Corona City Council
February 5, 2025

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AESTHETICS

ENPLANNERS

4.1-45
permitted clustering is to enhance the environmental sensitivity of a development project, and facilitate the permanent protection of key features of the natural environment, such as steep slopes, biological habitats, ridgelines, and scenic areas, including the retention of protected open space areas. Clustering is not be used to increase the overall density of an area beyond that which is otherwise permitted by the Specific Plan, nor is clustering to be used to create suburban style subdivisions within the Specific Plan area. All development, including clustered development is to be rural in character.
a) The location of clustered units is to be restricted to portions of a site with less than a 35 percent actual slope.
b) Clustered development must preserve open space in its natural state.

Adequate legal provisions shall be made during additional environmental review of any clustered development projects to ensure the preservation of open space areas in perpetuity.
• The use of retaining walls and structures is encouraged when it significantly reduces site grading. Except where employed to facilitate construction of a residential dwelling, retaining structures shall be located and restricted to 4 vertical feet in height so that they do not become a dominating visual feature. When taller retaining structures are built to accommodate a single family dwelling unit, the retaining structure should be located behind the dwelling so as to be screened from view by the home.
• Where retaining walls face or will be visible from public streets, they should be faced with materials that help blend the wall into the natural character of the terrain.
a) Large retaining walls in a uniform plane should be avoided. Break retaining walls into elements and terraces, and use landscaping to screen them from view.
b) The overall scale and massing of structures shall respect the natural surroundings and unique visual resources of the area by incorporating designs which minimize bulk and mass, follow natural topography, and minimize visual intrusion on the natural landscape.
• Houses shall not be excessively tall so as to dominate their surroundings.

Structures shall be a maximum of 30 feet in height, but may be constructed on split, flat pads contained within a limited envelope parallel to the finished grade, rather than "jutting out" over natural slopes.
• Building forms shall be scaled to the particular environmental setting so as to complement the hillside character and to avoid excessively massive forms that fail to enhance the hillside character.
• Building facades shall change plane or use overhangs as a means to create changing shadow lines to further break up massive forms.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AESTHETICS

ENPLANNERS

4.1-46
• Wall surfaces facing towards viewshed areas shall be minimized through the use of homes placed on split pads, setbacks, roof pitches, and landscaping.
• Roof lines and elements shall reflect the naturally occurring ridgeline silhouettes and topographical variation, or create an overall variety, that blends with the hillside.
• Architectural style, including materials and colors, should be compatible with the natural setting. The use of colors, textures, materials and forms that will attract attention by not relating to other elements in the neighborhood is to be avoided.
• As part of submittal requirements for tentative tract and parcel maps within PA 5, require that building pads be identified for all proposed development, that tentative maps identify the type of construction (e.g., slab-on-grade, post and beam, etc.), and that tentative maps establish a three-dimensional building envelope for each dwelling.
• Overhead utilities (e.g., electrical, telephone, etc.) should only be permitted under the following circumstances:
a) within the right-of-way of roadways connecting development areas; b) within the rights-of-way of roadways where all lots are 5 acres in size or greater.

In cases where aboveground utilities are permitted within the right-of-way of a roadway, connections to individual dwellings shall be underground. Utilities shall continue to be underground within subdivisions and parcel maps along roadways serving parcels smaller than 5 acres, as currently required. Where overhead utilities are permitted, their adverse visual impact on surrounding properties is to be mitigated through sensitive placement. Clear cutting of vegetation for an overhead utility corridor shall not be permitted.

4.6.1B: The interface between new development and natural open space shall be designed to provide a gradual transition from manufactured areas into natural areas. By extending fingers of planting into existing and sculptured slopes, the new landscape should blend in with the natural vegetation. It is intended that the transition between manufactured areas and natural areas occur sufficiently beyond residential structures so as to permit the development to meet applicable Fire Department brush clearance requirements.

4.6.1C: Planting along the slope side of development shall be designed to allow controlled views out, yet partially screen and soften the architecture. In general, 50 percent screening of new structures with plant materials should be accomplished.

4.6.1D: Trees and shrubs are to be arranged in informal, randomly spaced masses, and shall be placed selectively to reduce the scale of long, steep slopes.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AESTHETICS

ENPLANNERS

4.1-47

4.6.1E: To protect the public health and safety, development within PAs 1, 5, and 6 shall ensure the ongoing maintenance of manufactured slopes.

4.6.1F: Development within hillside areas shall be conditioned upon the following:
a) Where a manufactured slope over 5 feet in height is created in order to develop a single family dwelling, landowners should be required to record a deed restriction which provides an acknowledgment of the existence of the manufactured slope, requires that such slope be maintained by landowner, and indemnifies the City from damages should the slope fail in the future.
b) In the case of a parcel map or tentative tract map, a declaration of covenants, conditions, and restrictions shall be prepared and recorded providing for the development and maintenance of manufactured slopes over 5 feet in height, and indemnifying the City from damages should the slope fail in the future

4.6.1G: In addition, the applicant for such a land division or subdivision shall include a program and/or make provision for staff for preventive maintenance of manufactured slope areas in excess of 5 feet in height. Such program must be approved prior to approval of a final map, and shall include homeowner slope maintenance requirements and guidelines to be incorporated into the declaration of covenants, conditions, and restrictions.

4.6.1H: A minimum five-year revegetation monitoring and maintenance program is to be required for all development requiring slope bank and/or habitat vegetation.

The revegetation monitoring program shall include monthly inspection for months 1 through 12, quarterly inspection for months 12 through 36, and semiannual inspection for months 36 through 60. Inspections shall be performed by a qualified botanist subject to City approval.

4.6.1I: Primary ridgelines should be protected from any construction activities including, but not limited to roads, structures, water tanks, antennae, utilities, etc. so as to maintain a natural skyline.

4.6.1J: New parcels that have, as their only feasible building site, a primary ridgeline shall not be created. Where the only feasible building site within an existing parcel is on a primary ridgeline, the structure shall be sited at the lowest possible elevation on the site, and along the least visible portion of the ridge upon which a structure can feasibly be constructed.

4.6.1K: Where development is proposed to occur adjacent to a primary ridgeline (a ridge which is visible against the sky as viewed from a public street), it should be set back a sufficient distance so as to be located below the ridgeline. The intent of this requirement is to maintain a natural skyline.

4.6.1L: Planting shall be used along recontoured secondary (non-skyline) ridges to recreate a natural silhouette, and to act as a backdrop for structures. Trees shall be planted to create a continuous linear silhouette since gaps in the planting will not give the desired effect.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AESTHETICS

ENPLANNERS

4.1-48

4.6.1M: Sources of lighting within the Specific Plan area should be limited to the minimum standard to ensure safe circulation and visibility.

4.6.1N: Street lighting should be limited to intersections and other locations needed to maintain safe access (e.g., sharp curves).

4.6.1O: Exterior lighting for buildings should be of a low profile and intensity.

4.6.2A: Access: Roadways within PA 5 should provide for minimum safe passage of two cars along a paved road section, except in limited circumstances. Within the upper elevations of PA 5, a further reduction in required roadway width for private roadways which will ultimately serve a maximum of four dwellings, based on the maximum allowable density permitted by the Specific Plan, and where not providing such a reduction would effectively preclude access may be permitted upon the approval of the City Engineer. For such roadways, a curbto-curb width which does not allow for passage of two vehicles (minimum 16 feet, measured edge-to-edge) for a distance of up to 150 feet in any one segment may be permitted upon the approval of the City Engineer.

Where such a reduction in roadway width is permitted, owners whose land is served by such a roadway should be required to provide adequate assurance that the roadway will be kept properly maintained at all times. In addition, such landowners will be required to record a deed restriction that prohibits further subdivision of the property, and provides an acknowledgment of this special circumstance. Such owners will also be required to indemnify the City or any other service provider against any liability regarding emergency or nonemergency vehicle access.

4.6.2B: Roadway grades and curves should accommodate safety and emergency vehicles. Existing roadway grade standards shall be applied to all proposed subdivisions and parcel maps. However, the City Engineer may grant exceptions to existing roadway standards for grades and curves where, in his judgement, existing or future access cannot reasonably meet such standards.

These exceptions are to be limited to providing access to a single family dwelling on an existing lot of record along roadways which will ultimately serve a maximum of four dwellings, based on the maximum allowable density in the Specific Plan, and where not providing such an exception would effectively preclude access to an existing lot of record.

Where the City Engineer grants an exception to roadway grade standards, owners whose land is served by such a roadway will be required to provide adequate assurance that the roadway will be kept properly maintained at all times. In addition, such landowners and/or developer will be required to record a deed restriction at the time of tract map recordation that prohibits further subdivision of the property, and provides an acknowledgment of this special circumstance.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AESTHETICS

ENPLANNERS

4.1-49
Such owners will also be required to indemnify the City or any other service provider against any liability regarding emergency or non-emergency vehicle access.

4.6.2C: The provision of adequate flood control and/or erosion control measures for public and private roadways shall occur in a manner consistent with the rural character of PA 5. Require the provision of concrete curbs and gutters to the portions of PA 5 area where they are needed to prevent erosion, as determined by the City Engineer. Within PA 5, rolled curbs are to be the preferred road edge along paved roads where such curbing will be adequate to contain drainage and prevent erosion.

4.6.3A: Preservation of Open Space: Development projects are to be designed to protect habitat values and to preserve significant, viable habitat areas and habitat connections in their natural condition. Manufactured slopes shall be landscaped or revegetated with natural or naturalized, fire-resistant vegetation.

4.1.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT No new mitigation measures related to aesthetics are required.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AESTHETICS

ENPLANNERS

4.1-50
This Page Intentionally Left Blank

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-1

4.2 AGRICULTURAL AND FORESTRY RESOURCES

4.2.1 INTRODUCTION
This section provides a summary of applicable impacts and mitigation measures from the 2001 EIR, an overview of existing agricultural and forest resources within the GRRSP Planning Area and surrounding region, a summary of applicable regulations, and analyses of potential changes in impacts to agricultural and forest resources from implementation of the Modified Project in comparison to the Approved Project. No NOP comment letters, or Scoping Meeting comments were received pertaining to this topic.

4.2.2 SUMMARY OF IMPACTS AND MITIGATION MEASURES FROM THE 2001 EIR
The 2001 EIR determined the Approved Project would not impact Agricultural Resources.

Although impacts related to forest resources were not analyzed in the 2001 EIR because CEQA guidelines at that time did not require such discussion, impact to forest resources will be analyzed below.

The Approved Project impact analysis related to Agricultural Resources as presented in the 2001 EIR as well as any mitigation measures identified to reduce significant impacts are summarized as follows.
a) Affect agricultural resources or operations? (Land Use and Planning) The 2001 EIR concluded the Approved Project would produce no impacts to agricultural resources. At that time, the northern portion of the site south of Green River Road was being used for horse boarding with several pens and corrals located in the northwestern portion of the property. Implementation of the Approved Project would necessitate the removal of the horse boarding activities and associated structures and equipment. Impacts were considered be less than significant. Similar to existing conditions, the Project site was not being used for the production of agricultural crops and does not otherwise contribute to the agricultural productivity of the immediate area, City, region, or state. As the response concluded, the proposed Project would not have an impact on either agricultural production or resources.

Cumulative Impacts
Because the proposed Project would not have an impact on either agricultural production or resources, it can be concluded cumulative impacts would be less than significant as there were no other development projects that would produce impacts that would comingle with those from the Approved Project creating a significant agricultural impact over and above those at the Project level. Therefore, cumulative were determined to be less than significant.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-2

4.2.3 ENVIRONMENTAL SETTING
The GRRSP Planning Area encompasses the area adjacent to Green River Road, east of the SR-91/Green River Road interchange and west of Dominguez Ranch Road. The Project site is largely undeveloped. However, the site is surrounded by residential development to the north (beyond the SR-91), vacant and disturbed land to the south, residential and commercial development to the east, and vacant and disturbed land to the west. Vacant areas are mostly covered with native vegetation, much of which consists of low-lying scrub. Elevations on site range from 1,110 feet in the southwestern corner of the property to 515 feet in the northeastern corner of the property.

The southern portion of the property is in an undeveloped natural condition dominated by rugged hillside terrain of the Santa Ana Mountains vegetated by grass, brush, scrub, and chaparral. Due to the topography of the property, development has been limited to the northern portion of the Specific Plan area. The eastern portion of the GRRSP Planning Area is occupied by two single-family residences. Several equestrian stables, one above water reservoir and a concrete lined stormwater basin related to prior horse boarding operations remain on-site.

The current Farmland Monitoring and Mapping Program (FMMP) map identifies the Project site, which consists of the ±160-acre Project site as having the following designations:

Grazing Land: Existing vegetation is suited to the grazing of livestock.

Urban and Built-up Land: Urban and Built-Up land is occupied by structures with a building density of at least 1 unit to 1.5 acres, or approximately 6 structures to a 10-acre parcel. Common examples include residential, industrial, commercial, institutional facilities, cemeteries, airports, golf courses, sanitary landfills, sewage treatment, and water control structures.

Other Land: land not included in any other mapping category. Examples include low density rural developments.

Farmland of Local Importance: Land of importance to the local agricultural economy as determined by each county's board of supervisors and a local advisory committee.

The Project site does not contain any land defined as prime or farmland of statewide importance, forest land (as defined by Public Resources Code section 12220(g)), timberland (as defined by Public Resources Code section 4526), or land zoned Timberland Production (as defined by Government Code section 51104(g)).

4.2.4 PROJECT DESIGN FEATURES (PDF)
No Project Design Features are proposed for the Modified Project.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-3

4.2.5 EXISITNG REGULATIONS, PLANS, PROGRAMS, AND POLICIES

FEDERAL REGUALTIONS
There are no federal regulations that apply to the Modified Project.

STATE REGULATIONS
California Land Conservation Act (CLCA)
The CLCA of 1965, also known as the Williamson Act (California Government Code § 51200, et seq.), enables local governments to enter into contracts with private landowners for the purpose of restricting specific parcels of land to agricultural or related open space use. In return, landowners receive property tax assessments that are much lower than normal because they are based upon farming and open space uses as opposed to full market value. Pursuant to California Government Code § 51230, counties and cities may establish Agricultural Preserves, which define boundaries of those areas within which the city or county will be willing to enter into contracts pursuant to the CLCA. Contracts pursuant to the CLCA are only allowed for areas within established Agricultural Preserves. Agricultural Preserves generally must be at least 100 acres in size; however, a city or county may allow for lesser acreage if a finding is made that the characteristics of the agricultural enterprises in the area are unique and that the establishment of preserves of less than 100 acres is consistent with the general plan of the county or city. Once established, land uses within an Agricultural Preserve must be agricultural in nature, or other such uses that are not incompatible with agricultural uses. (CDC, 2019; CA Legislative Info, n.d.)
Farmland Mapping and Monitoring Program (FMMP)
The goal of the CDC’s FMMP is to provide consistent, timely, and accurate data to decision makers for use in planning for the present and future of California's agricultural land resources.

To meet this goal, the FMMP's objective is to provide maps and statistical data to the public, academia, and local, state, and federal governments to assist them in making informed decisions for the best utilization of California's farmland. The FMMP was established in 1982 in response to what was by then a critical need for data on the nature, location, and extent of farmland, grazing land, and urban built-up areas in the State. California Government Code § 65570 mandates FMMP to biennially report to the Legislature on the conversion of farmland and grazing land, and to provide maps and data to local government and the public. The FMMP was also directed to prepare and maintain an automated map and database system to record and report changes in the use of agricultural lands. It was the intent of the Legislature and a broad coalition of building, business, government, and conservation interests that FMMP be non-regulatory, and provide a consistent and impartial analysis of agricultural land use and change in California. With this in mind, FMMP provides basic data from which observations and analyses can be made in the land use planning process. Pursuant to the FMMP, all lands

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-4
within California are classified into one of seven map categories, as previously summarized in subsection 4.2.1. (CDC, 2004)
California Forest Practice Act
The California Department of Forestry and Fire Protection (CAL FIRE) enforces the laws that regulate logging on privately-owned lands in California. The Forest Practice Act was enacted in 1973 to ensure that logging is done in a manner that will preserve and protect fish, wildlife, forests and streams. The State Board of Forestry and Fire Protection (BFFP) enacts and enforces additional rules to protect these resources. (CAL FIRE, n.d.)

REGIONAL REGULATIONS
There are no regional regulations that apply to the Modified Project.

LOCAL REGULATIONS
Corona Municipal Code
The City of Corona’s Municipal Code has an Agricultural zone defined by Chapter 17.06 and two overlay zones of Agricultural Products (AP) and Animal Keeping and Agricultural Operation (AA), defined by Chapter 17.62 that allow for agricultural uses. The agriculture (A) zone was developed to accommodate the agricultural land uses that existed in Corona before urbanization. The AP overlay zones was originally developed during the early 1980s to allow the retail sale of agricultural products on land where the product is grown and has an Agricultural zone. The AA overlay zone was created in 2013 when the city attempted to annex Temescal Valley.

City of Corona 2020-2040 General Plan
Healthy Communities Element
Policy HC-3.1 Allow for limited agricultural uses, including community gardens, in areas of the city that are consistent with land use, zoning, and permitting requirements.

Environmental Resources Element
Policy ER-8.1 Cooperate with federal and state agencies to achieve the sustainable conservation of forest lands as a means of providing open space and protecting natural resources and MSHCP habitat.

Policy ER-8.2 Support conservation programs to reforest privately held forest lands.

Policy ER-8.3 Work with Riverside County to update the Vegetation Map for Corona and the SOI areas in cooperation with the California Department of Fish and Wildlife, the Natural Diversity Data Base, the United States Forest Service, and other knowledgeable agencies.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-5

4.2.6 THRESHOLDS OF SIGNIFICANCE
Based on the relevant CEQA Guidelines as currently implemented by the City of Corona, significant agricultural and forest resources impacts would occur if the proposed Project or any Project-related component would:

Threshold AGF-1 Convert Prime Farmland, Unique Farmland, or Farmland of Statewide Importance (Farmland), as shown on the maps prepared pursuant to the Farmland Mapping and Monitoring Program of the California Resources Agency, to non-agricultural use?
Threshold AGF-2 Conflict with existing zoning for agricultural use or a Williamson Act contract?
Threshold AGF-3 Conflict with existing zoning for, or cause rezoning of, forest land (as defined in Public Resources Code section 12220(g)), timberland (as defined by Public Resources Code section 4526), or timberland zoned Timberland Production (as defined by Government Code section 51104(g))?
Threshold AGF-4 Result in the loss of forest land or conversion of forest land to non-forest use?
Threshold AGF-5 Involve other changes in the existing environment, which, due to their location or nature, could result in conversion of Farmland to nonagricultural use or conversion of forest land to non-forest use?

METHODOLOGY
The following analysis was used to assess the potential impacts of the Modified Project on agricultural and forestry resources. Review of existing data sources, such as the California Department of Food and Agriculture's Farmland Mapping and Monitoring Program (FMMP) and the US Forest Service's Forest Inventory and Analysis (FIA) program was used to identify the agricultural and forestry resources in the Project area. In addition, assessment of the Modified Project’s potential impacts on agricultural and forestry resources included evaluation of the potential to convert agricultural land to non-agricultural uses, to disrupt agricultural operations, or to damage forestry resources.

Desktop analysis was used to review existing data sources on agricultural and forestry resources in the Project area. The following data sources were used to assess the potential impacts of the project on agricultural and forestry resources:
• California Department of Food and Agriculture's Farmland Mapping and Monitoring Program (FMMP)
• US Forest Service's Forest Inventory and Analysis (FIA) program

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-6
• National Agricultural Statistics Service
• California Department of Forestry and Fire Protection • Local agricultural and forestry agencies

4.2.7 ENVIRONMENTAL IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Impacts
Would the
Modified
Project result
in new or
more severe
impacts
requiring
revisions to
the Prior
EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions
to the Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the
Modified Project
requiring
revisions to the
Prior EIR?
Would the
Modified
Project result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

AGF-1 Convert Prime Farmland,
Unique Farmland, or
Farmland of Statewide
Importance (Farmland), as
shown on the maps
prepared pursuant to the
Farmland Mapping and
Monitoring Program of
the California Resources
Agency, to nonagricultural use?
AGF-2 Conflict with existing
zoning for agricultural use
or a Williamson Act
contract?
AGF-3 Conflict with existing
zoning for, or cause
rezoning of, forest land
(as defined in Public
Resources Code section
12220(g)), timberland (as
defined by Public
Resources Code section
4526), or timberland
zoned Timberland
Production (as defined by
Government Code section
51104(g))?
AGF-4 Result in the loss of forest
land or conversion of
forest land to non-forest
use?

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-7
AGF-5 Involve other changes in
the existing environment,
which, due to their
location or nature, could
result in conversion of
Farmland to nonagricultural use or
conversion of forest land
to non-forest use?

IMPACTS ASSOCIATED WITH THE MODIFIED PROJECT
Impact AGF-1: Convert Prime Farmland, Unique Farmland, or Farmland of Statewide Importance (Farmland), as shown on the maps prepared pursuant to the Farmland Mapping and Monitoring Program of the California Resources Agency, to non-agricultural use?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

No changes in the location, size, or boundaries of the GRRSP Planning Area boundary have occurred since adoption of the GRRSP in 2001. As discussed in the Project Description, the Modified Project would modify the size and boundaries of the GRRSP, however minimally in the northern portion of the Project site. In addition, the eastern portion of the Project site has been slightly expanded to incorporate appropriate grading limits within the hilly terrain.

Since certification of the EIR in 2001, a revised Important Farmland Map has been issued by the Farmland Mapping and Monitoring Program of the California Resources Agency. Based on the revised California Important Farmland Map (Department of Conservation, 2022) and similar to the analysis within the 2001 EIR, there are no Prime and Unique Farmland within the Specific Plan area. However, the Farmland of Local Importance located on the GRRSP Planning Area (northeastern) designated by the FMMP is not designated as such in the General Plan EIR, Figure 5.2-1, Agricultural Resources. Although the Modified Project increases the GRRSP Planning Area, the Modified Project would have no change in impacts in comparison to those identified in the 2001 EIR. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR.

Mitigation Measure
No mitigation measures are required.

Impact AGF-2: Conflict with existing zoning for agricultural use or a Williamson Act contract?

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-8
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The Modified Project would not include any new the land use designations beyond those previously analyzed in the 2001 EIR. Therefore, the Project would not conflict with an existing zoning for an agricultural use. As stated in the City’s General Plan EIR, a Williamson Act contract for a preserve in the City was terminated, and there were no Williamson Act contracts in the City. However, the General Plan EIR concluded development of the General Plan would convert Williamson Act Land to nonagricultural uses and the associated loss of agricultural preserve lands under would be significant and unavoidable.

As previously stated, there are no lands currently within the City that are in an existing Williamson Act contract. As a result, no conflicts with Williamson Act contract lands would occur. The Modified Project would result in no conflicts with Williamson Act contract lands.

Although not specifically analyzed in the 2001 EIR, the Modified Project would result in no impact to Williamson Act Contract lands. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact AGF-3: Conflict with existing zoning for, or cause rezoning of, forest land (as defined in Public Resources Code section 12220(g)), timberland (as defined by Public Resources Code section 4526), or timberland zoned Timberland Production (as defined by Government Code section 51104(g))?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The Modified Project proposes a minor increase in acreage, and changes to the land use designations within the GRRSP boundary. However, the proposed changes are designed to accommodate build out of the GRRSP and the proposed BPI Development. The GRRSPA would result in minor changes in land uses and these changes would result in no conflicts with existing zoning.

Although not discussed in the 2001 EIR, the City’s General Plan EIR concludes no forest land or timberlands are located within the City. The Cleveland National Forest is southerly adjacent to the City limits, however not within the City. The Modified Project is not zoned for any forest land or timberland uses. No new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR.

Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-9
Mitigation Measure
No mitigation measures are required.

Impact AGF-4: Result in the loss of forest land or conversion of forest land to nonforest use? Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As previously discussed in Impact AGF-3, the Modified Project would have no impact on forestland or timberland. The 2001 EIR did not address this topic, however the General Plan EIR determined that there are no current or planned fixed commercial timber operations subject to a Timber Harvesting Plan in southwest Riverside County (CALFIRE) and there are no timber production zones in the City or its SOI. Consequently, implementation of the General Plan Update would not result in loss or conversion of timberland to non-forest uses. It can be concluded the GRRSP Planning Area similarly does not contain any forest land or timberland uses, and implementation of the Modified Project would not result in the conversion of forest land to non-forest uses. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR.

Mitigation Measure
No mitigation measures are required.

Impact AGF-5: Involve other changes in the existing environment, which, due to their location or nature, could result in conversion of Farmland to nonagricultural use or conversion of forest land to non-forest use? Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As discussed above in Impacts AGF-1 through AGF-5, there are no farmlands in the vicinity of the GRRSP Planning Area that would be subject to potential conversion to non-agricultural use, and there are no forest lands in or within the vicinity of the Project. As concluded, the Farmland of Local Importance located on the GRRSP Planning Area (northeastern) designated by the FMMP is not designated as such in the General Plan EIR, Figure 5.2-1, Agricultural Resources. The Modified Project would not convert farmland to non-agricultural uses or forest land to non-forest uses. The Modified Project would not result in impacts to the existing environment, which due to their location or nature, could convert Farmland to non-agricultural use or forest land to non-forest use. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR.

Mitigation Measure
No mitigation measures are required.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AGRICULTURAL AND FORESTRY RESOURCES

ENPLANNERS

4.2-10

4.2.8 CUMULATIVE IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Less Than Significant Impact/No Changes or No New Information Requiring Preparation of an EIR.

The Approved Project’s cumulative impacts associated with agricultural and forestry resources was not specifically addressed in the 2001 EIR. However, the cumulative effect of development in the region was already resulting in the conversion of agricultural lands to nonagricultural uses at the time the 2001 EIR was certified. Because agricultural land, including Prime Farmland, Williamson Act land, and land zoned for agricultural operations, is a finite resource, the conversion of Farmland to urban uses, combined with planned and future development in the City and region, represents a significant cumulative impact to agricultural operations and resources that cannot be mitigated. It can be inferred both the Approved and Modified Project would not result in any cumulative impacts associated with farmland and forestry resources because there is no farmland or forestry zoned properties or operations within or near the GRRSP Planning Area. Therefore, the Modified Project would not result in a change in cumulative impacts that would require further analysis and the level of impact would remain the same as can be inferred from the time the 2001 EIR was certified.

4.2.9 MITIGATION MEASURES IDENTIFIED IN PRIOR EIR APPLICABLE TO

MODIFIED PROJECT
No mitigation measures are required.

4.2.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT No mitigation measures are required.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-1

4.3 AIR QUALITY

4.3.1 INTRODUCTION
This section provides a summary of applicable impacts and mitigation measures from the 2001 EIR, an overview of existing air quality conditions within the GRRSP Planning Area and surrounding region, a summary of applicable regulations, and analyses of potential changes in impacts to air quality from implementation of the Modified Project in comparison to the Approved Project. Mitigation measures are recommended as necessary to reduce significant air quality impacts. NOP comment letters from South Coast Air Quality Management District, Southern California Association of Governments, and California Allied for a Responsible Economy were received pertaining to this topic. No Scoping Meeting comments were received pertaining to this topic.

This section of the Draft SEIR is based in part on the Green River Ranch Specific Plan Amendment, SP00-001 Amendment No.1, Air Quality Impact Analysis, prepared by Urban Crossroads, dated June 12, 2024 (Appendix D-1), and the Green River Ranch Specific Plan Amendment, SP00-001 Amendment No.1, Health Risk Assessment, prepared by Urban Crossroads, dated June 12, 2024 (Appendix D-2).

4.3.2 SUMMARY OF IMPACTS AND MITIGATION MEASURES FROM THE 2001 EIR
The 2001 EIR screened out from detailed analysis and assessment of impacts associated with:
altering air movement, moisture, or temperature or cause any change in climate; emissions within ¼ mile of school; and burning of wastes as no impact or a less than significant impact was determined. These conclusions were reached because the type of commercial and residential buildings resulting from the GRRSP Plan would not significantly alter existing subregional air movements and none of the land uses GRRSP would significantly alter surrounding levels of moisture, temperature, or local temperatures. In addition, the 2001 EIR determined no schools were located in the Approved Project vicinity and therefore the Approved Project would not emit emissions near schools and the Approved Project would not involve the burning of wastes resulting in no impact. All further impacts were analyzed in detail 2001 EIR.

The Approved Project impact analysis related to air quality as presented in the 2001 EIR as well as any mitigation measures identified to reduce significant impacts are summarized as follows:
a) Conflict with or obstruct implementation of the applicable air quality plan? The 2001 EIR determined the increase in traffic volume resulting from development of the Approved Project would result in more air pollution emission in comparison to the uses that

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-2
could develop on the site per the existing County of Riverside General Plan that existed at that time. The then current Air Quality Management Plan (AQMP) contained air quality attainment goals based on air pollution emissions resulting from population and employment projections provided to SCAG from local agencies. Estimated increases in population and employment resulting from implementation of the Approved Project were determined to be within the population and employment projections provided to SCAG by the County of Riverside.

Consequently, the Approved Project was determined to be consistent with the AQMP and no mitigation was warranted.
b) Violate any air quality standard or contribute to an existing or projected air quality violation?
The 2001 EIR evaluated the significance of construction and operational emissions generated by the Approved Project. Peak grading and construction emissions associated with the Approved Project would exceed the SCAQMD thresholds for the criteria pollutant of NOx and PM10 resulting in a significant impact. Mitigation measures 4.3.1A thru G were identified to be implemented during construction of the Approved Project. Even with implementation of all feasible mitigation measures, the prior EIR determined construction impacts would remain significant and unavoidable.

The 2001 EIR determined area source emissions (stationary source emissions related to operations of a land use) and mobile source emissions (emissions from project related vehicular traffic) associated with the Approved Project would exceed the SCAQMD thresholds for the criteria pollutants CO, ROC, and NOx resulting in a significant impact. Mitigation measures

4.3.2A thru C were identified to be implemented during operations of the Approved Project.

Even with implementation of all feasible mitigation measures, the prior EIR determined operational impacts would remain significant and unavoidable. c) Expose sensitive receptors to substantial pollutant concentrations? The 2001 EIR evaluated the significance of emissions and particulates generated by the Approved Project. Air pollutants generated by the Approved Project would include temporary increased levels of emissions and particulates resulting from grading and construction activities. Air pollutants would be produced from vehicular emissions resulting from project traffic once the planned commercial facilities and residences are occupied. A notable sensitive receptor identified in the 2001 EIR that may be affected by these pollutants was the existing residential subdivision located east of the project on both sides of Dominguez Ranch Road.

However, the CO hot spot analyses determined the Approved Project would not result in CO hot spots impacts. As a result, the Approved Project was determined to have a less than significant impact on local air quality for CO, and no mitigation measures were warranted.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-3
d) Create objectionable odors?
Development of the non-residential land uses proposed by the Approved Project could include typical retail, service commercial, office, light industrial, restaurant and hotel uses. Odors typically associated with these uses are identified with organic material, such as food wastes generated by food and eating establishments. Many temporary or short-term odor releases are potentially associated with construction activity, which include the sources but are not limited to glues, paint, asphalt, and other architectural coatings.

Impacts were determined to be less than significant with proper handling and storage of such materials to prevent significant human exposure to offensive odors. These standard operating procedures, coupled with appropriate setbacks from sensitive off-site uses, were determined to reduce impacts from objectionable odors generated by the Approved Project to less than significant.

Cumulative Impacts
The 2001 EIR determined operational emissions associated with the Approved Project in conjunction with build out of the City's General Plan, would result in significant, cumulative air quality impacts within the Basin. Emissions of NOx during construction of the Approved Project would cumulatively contribute to regional ozone formation, and because the Basin is a non-attainment zone for ozone, this would be a significant air quality impact. Emissions of criteria pollutants and fugitive dust from construction activity would result in localized air quality impacts in the project vicinity. The 2001 EIR determined the Approved Project’s construction emissions would not comingle with construction emissions from other off-site locations and therefore localized air quality impacts would be less than significant. The 2001 EIR concluded that long-term operational stationary and mobile source emissions would contribute to regional criteria pollutant emissions, and these emissions would cumulatively contribute to significant regional air quality impacts. Impacts would be significant and unavoidable even with the implementation of mitigation measures 4.3.2A through C.

4.3.3 ENVIRONMENTAL SETTING
The proposed Project site is within the South Coast Air Basin (SCAB), an area covering approximately 6,745 square miles and bounded by the Pacific Ocean to the west and the San Gabriel, San Bernardino, and San Jacinto Mountains to the north and east. The Los Angeles County portion of the Mojave Desert Air Basin is bounded by the San Gabriel Mountains to the south and west, the Los Angeles / Kern County border to the north, and the Los Angeles / San Bernardino County border to the east. The Riverside County portion of the Salton Sea Air Basin is bounded by the San Jacinto Mountains in the west and spans eastward up to the Palo Verde Valley.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-4
Climate
The regional climate significantly affects the air quality in the SCAB because temperature, wind, humidity, precipitation, and sunshine all play a role. The SCAB including the GRRSP Area has a semi-arid climate with mild temperatures and low rainfall. However, the presence of a marine layer creates moist air near the surface, especially along the coast. This marine layer combined with sunshine are key factors in photochemical smog formation. Wind is also crucial for air quality as it disperses pollutants. Wind patterns vary throughout the year, with some seasonal winds like the Santa Ana winds contributing to higher air pollution.

Temperature inversions act as a lid over the SCAB, trapping pollutants near the ground. These inversions are more common in the summer and winter.

Air Quality
Air pollution contributes to a wide variety of adverse health effects. The EPA has established federal national ambient air quality standards (NAAQS) for six of the most common air pollutants: carbon monoxide (CO), lead (Pb), ozone (O3), particulate matter (PM10 and PM2.5), nitrogen dioxide (NO2), and sulfur dioxide (SO2) which are known as criteria pollutants. The California Air Resource Board (CARB) administers the California ambient air quality standards (CAAQS) first established in 1962. The CAAQS addresses the pollutants covered by the NAAQS and establishes standards for SO4, visibility, hydrogen sulfide (H2S), and vinyl chloride (C2H3Cl). However, at this time, H2S and C2H3Cl are not measured at any monitoring stations in the SCAB because they are not considered to be a regional air quality problem.

Generally, the CAAQS are more stringent than the NAAQS. The SCAQMD monitors levels of various criteria pollutants at 37 permanent monitoring stations and 5 single-pollutant source Pb air monitoring sites throughout the air district. On January 5, 2021, CARB posted the 2020 amendments to the state and national area designations.

SCAQMD has designated general forecast areas and air monitoring areas, Source Receptor Areas (SRA) throughout the district in order to provide Southern California residents about the air quality conditions. The GRRSP Planning Area is located within the Corona/Norco Area SRA 22. The Corona/Norco Area monitoring station is located approximately 5.4 miles northeast of the GRRSP Planning Area and reports air quality statistics for PM10 (2020 year).

As the Corona/Norco Area monitoring station does not include statistics for O3, CO, NO2, PM10 (for the 2019 and 2021 years), and PM2.5 the next nearest station was used within the Air Quality Impact Analysis (AQIA) prepared for the proposed Project. The SRA 33 monitoring station is located 10.7 miles northeast of the GRRSP Planning Area and reports air quality statistics for NO2 and PM2.5. Additionally, the Metropolitan Riverside County (SRA 23) monitoring station, located approximately 15.8 miles northeast of the GRRSP Planning Area, is the next nearest monitoring station that reports air quality statistics for O3, CO, and PM10 (for 2019 and 2021). As discussed in the AQIA (Appendix C-1), from 2019 through 2021 the

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-5
ambient air quality standards were exceeded for the study area, which is considered to be representative of the local air quality at the GRRSP Planning Area.

Sensitive Receptors
SCAQMD defines sensitive receptor locations as residential or other locations where sensitive populations may be located. Other sensitive receptor locations include schools, hospitals, convalescent homes, day care centers, and other locations where children, chronically ill individuals, or other sensitive persons could be exposed.

4.3.4 EXISTING REGULATIONS, PLANS, PROGRAMS, AND POLICIES

FEDERAL REGULATIONS
Federal Clean Air Act
Air quality is federally protected by the Federal Clean Air Act (FCAA) and its amendments.

Under the FCAA, the United States Environmental Protection Agency (EPA) developed the primary and secondary NAAQS for the criteria air pollutants including O3, NO2, CO, SO2, PM10, PM2.5, and lead. Proposed projects in or near nonattainment areas could be subject to more stringent air permitting requirements. The FCAA requires each state to prepare a State Implementation Plan (SIP) to demonstrate how it would attain the NAAQS within the federally imposed deadlines.

The EPA can withhold certain transportation funds from states that fail to comply with the planning requirements of the FCAA. If a state fails to correct these planning deficiencies within two years of Federal notification, the EPA is required to develop a Federal implementation plan for the identified nonattainment area or areas. The provisions of 40 Code of Federal Regulations Parts 51 and 93 apply in all nonattainment and maintenance areas for transportation-related criteria pollutants for which the area is designated nonattainment or has a maintenance plan. The EPA has designated enforcement of air pollution control regulations to the individual states.

STATE REGULATIONS
California Clean Air Act
CARB, which became part of the CalEPA in 1991, is responsible for ensuring implementation of the California Clean Air Act (Assembly Bill [AB] 2595), responding to the FCAA, and for regulating emissions from consumer products and motor vehicles. AB 2595 mandates achievement of the maximum degree of emissions reductions possible from vehicular and other mobile sources in order to attain the state ambient air quality standards by the earliest practical date. As noted previously, CARB established the CAAQS for all pollutants for which the federal government has NAAQS and, in addition, establishes standards for SO4, visibility, hydrogen sulfide (H2S), and vinyl chloride (C2H3Cl). Also noted previously, H2S and C2H3Cl are not measured at any monitoring stations in the SCAB because they are not considered to

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-6
be a regional air quality problem and generally, the CAAQS are more stringent than the NAAQS.

Local air quality management districts, such as the SCAQMD, regulate air emissions from stationary sources such as commercial and industrial facilities. All air pollution control districts have been formally designated as attainment or non-attainment for each CAAQS.

Serious non-attainment areas are required to prepare an AQMP that include specified emission reduction strategies in an effort to meet clean air goals. These plans are required to include:
• Application of Best Available Retrofit Control Technology to existing sources; • Developing control programs for area sources (e.g., architectural coatings and solvents) and indirect sources (e.g. motor vehicle use generated by residential and commercial development);
• A District permitting system designed to allow no net increase in emissions from any new or modified permitted sources of emissions;
• Implementing reasonably available transportation control measures and assuring a substantial reduction in growth rate of vehicle trips and miles traveled; • Significant use of low emissions vehicles by fleet operators; • Sufficient control strategies to achieve a 5% or more annual reduction in emissions or 15% or more in a period of three years for ROGs, NOX, CO and PM10. However, air basins may use alternative emission reduction strategy that achieves a reduction of less than 5% per year under certain circumstances.

California Title 24 Energy Efficiency Standards and California Green Building Standards
California Code of Regulations (CCR) Title 24 Part 6: The California Energy Code was first adopted in 1978 in response to a legislative mandate to reduce California’s energy consumption.

The standards are updated periodically to allow consideration and possible incorporation of new energy efficient technologies and methods. CCR, Title 24, Part 11: California Green Building Standards Code (CALGreen) is a comprehensive and uniform regulatory code for all residential, commercial, and school buildings that went in effect on January 1, 2009, and is administered by the California Building Standards Commission. CALGreen is updated on a regular basis, with the most recent approved update consisting of the 2022 California Green Building Code Standards that will be effective on January 1, 2023.

Local jurisdictions are permitted to adopt more stringent requirements, as state law provides methods for local enhancements. CALGreen recognizes that many jurisdictions have

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-7
developed existing construction waste and demolition ordinances and defers to them as the ruling guidance provided, they establish a minimum 65% diversion requirement.

The code also provides exemptions for areas not served by construction waste and demolition recycling infrastructure. The State Building Code provides the minimum standard that buildings must meet in order to be certified for occupancy, which is generally enforced by the local building official.

Energy efficient buildings require less electricity; therefore, increased energy efficiency reduces fossil fuel consumption and decreases greenhouse gas (GHG) emissions. The 2022 version of Title 24 was adopted by the CEC and will be effective on January 1, 2023.

The 2022 Title 24 standards would result in less energy use, thereby reducing air pollutant emissions associated with energy consumption in the SCAB and across the State of California.

For example, the 2022 Title 24 standards require solar photovoltaic systems for new homes, encourage the use of heat pumps for space and water heating, and require homes to be electric ready to ease the adoption of cleaner electric heating, cooking, and EV charging. The CEC anticipates that the 2022 energy code will provide $1.5 billion in consumer benefits and reduce GHG emissions by 10 million metric tons. The proposed Project would be required to comply with the applicable standards in place at the time building permit document submittals are made.

REGIONAL REGULATIONS
South Coast Air Quality Management District
SCAQMD is the air pollution control agency for Orange County as well as the urban portions of Los Angeles, Riverside, and San Bernardino Counties. The agency’s primary responsibility is ensuring that the federal and state ambient air quality standards are attained and maintained in the Basin. The SCAQMD is also responsible for adopting and enforcing rules and regulations concerning air pollutant sources, issuing permits for stationary sources of air pollutants, inspecting stationary sources of air pollutants, responding to citizen complaints, monitoring ambient air quality and meteorological conditions, awarding grants to reduce motor vehicle emissions, and conducting public education campaigns, as well as many other activities. All projects within the Basin are subject to SCAQMD rules and regulations in effect at the time of construction.

As stated previously, the AQMP is the SIP for the Basin. The AQMP is a regional blueprint for implementing air quality standards within the Basin and some portions of the Salton Sea Air Basin that are under SCAQMD’s jurisdiction. The AQMP asserts that the most effective way to reduce air pollution impacts is to reduce emissions from mobile sources. Additionally, the AQMP relies on partnerships between governmental agencies at the federal, state, regional, and local level. These agencies, which are comprised of USEPA, CARB, local governments, Southern California Association of Governments (SCAG) and the SCAQMD, are the primary

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-8
agencies that implement the AQMP programs. The AQMP incorporates the latest scientific and technical information and planning assumptions, including SCAG’s Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS), updated emission inventory methodologies for various source categories, and SCAG's latest growth forecasts, as well as includes integrated strategies and measures to meet the NAAQS.

During construction activities, the proposed Project would be subject to applicable rules established by the SCAQMD including, but not limited to:
• SCAQMD Rule 402: A person shall not discharge from any source whatsoever such quantities of air contaminants or other material that cause injury, detriment, nuisance, or annoyance to any considerable number of persons or to the public, or that endanger the comfort, repose, health, or safety of any such persons or the public, or that cause, or have a natural tendency to cause, injury or damage to business or property. The provisions of this rule do not apply to odors emanating from agricultural operations necessary for the growing of crops or the raising of fowl or animals.

Odor Emissions. All uses shall be operated in a manner such that no offensive odor is perceptible at or beyond the property line of that use. • SCAQMD Rule 403: This rule is intended to reduce the amount of particulate matter entrained in the ambient air as a result of anthropogenic (human-made) fugitive dust sources by requiring actions to prevent and reduce fugitive dust emissions. Rule 403 applies to any activity or human-made condition capable of generating fugitive dust and requires best available control measures to be applied to earth moving and grading activities.

Dust Control, Operations. Any operation or activity that might cause the emission of any smoke, fly ash, dust, fumes, vapors, gases, or other forms of air pollution, which can cause damage to human health, vegetation, or other forms of property, or can cause excessive soiling on any other parcel, shall conform to the requirements of the South Coast Air Quality Management District.
• SCAQMD Rule 1113: This rule serves to limit the Volatile Organic Compound (VOC) content of architectural coatings used on projects in the SCAQMD. This rule applies to any person who supplies, sells, offers for sale, or manufactures any architectural coating for use on projects.
• SCAQMD Rule 1301: This rule provides pre-construction review requirements to ensure that new or relocated facilities do not interfere with progress in attainment of the National Ambient Air Quality Standards (NAAQS), while future economic growth within the SCAQMD is not unnecessarily restricted. The specific air quality goal is to achieve no net increases from new or modified permitted sources of nonattainment air

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-9
contaminants or their precursors. Rule 1301 also limits emission increases of ammonia, and Ozone Depleting Compounds (ODCs) from new, modified or relocated facilities by requiring the use of Best Available Control Technology (BACT). • SCAQMD Rule 2305: The SCAQMD adopted Rule 2305, the Warehouse Indirect Source Rule, on May 7, 2021. Owners and operators associated with warehouses 100,000 square feet (sf) or larger are required to directly reduce NOX and PM emissions, or to otherwise facilitate emission and exposure reductions of these pollutants in nearby communities.
• SCAQMD Rule 461: Rule 461 governs the operation of gasoline stations and requires that all underground storage tanks are equipped with a “California Air Resources Board (CARB) certified” enhanced vapor recovery system, all fill tubes are equipped with vapor tight caps, all dry breaks are equipped with vapor tight seals, a spill box shall be installed to capture any gasoline spillage, and all equipment is required to be properly maintained per CARB regulations. Rule 461 also providers several additional requirements including detailed maintenance, testing, reporting, and recordkeeping requirements for all gas stations.

Although the proposed Project would comply with the above regulatory requirements, it should be noted that emission reductions associated with Rules 402, 1301, 401, 2305, and 461 cannot be quantified in the California Emissions Estimator Model (CalEEMod) and are therefore not reflected in the emissions presented herein. Conversely, Rule 403 (Fugitive Dust) (2) and Rule 1113 (Architectural Coatings) (3) can be modeled in CalEEMod. As such, credit for Rule 403 and Rule 1113 have been taken in the analysis.

LOCAL REGULATIONS
City of Corona 2020–2040 General Plan
Circulation Element
Policy CE-1.4 Design and employ traffic control measures to ensure City streets and roads function with safety and efficiency.

Policy CE-1.7 Limit driveway and local street access on arterial streets to maintain a desired quality of traffic flow. Wherever possible, consolidate driveways and implement access controls during redevelopment of adjacent parcels.

Policy CE-1.10 Require a traffic analysis to be prepared in accordance with the City’s adopted Traffic Impact Study Guidelines and require projects to mitigate impacts on the City’s circulation system that exceed the City’s adopted service thresholds for near term and future conditions.

Policy CE-3.3 Encourage employers to reduce vehicular trips by offering to employees commute trip reduction programs, such as transit fare subsidies, alternative work schedules

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-10
and telecommuting, employer-sponsored van pools or shuttles, ride share programs, and bike share.

Policy CE-4.2 Work with the Riverside Transit Agency to identify needs for additional bus services and enhancements to existing services.

Policy CE-4.5 Encourage employers to reduce single-occupant vehicular trips by providing employee incentives (e.g., reduced rate transit passes).

Policy CE-4.6 Require new development to provide transit facilities, such as bus shelters and turnouts, where deemed necessary, to encourage the use of transit and other alternative forms of transportation.

Policy CE-4.7 Preserve options for expanding future transit use when designing improvements for roadways or redeveloping major developments and including areas for transit facilities.

Policy CE-5.2 Maintain existing pedestrian facilities and encourage new development to provide walkways between and through developments.

Policy CE-5.3 Provide for safe accessibility to and use of pedestrian facilities by people with disabilities to implement accessibility requirements under the American with Disabilities Act.

Policy CE-5.6 Encourage new and existing development to provide accessible and secure areas for bicycle storage. Provide bicycle racks or storage facilities at public facilities and require bicycle parking, storage, and other support facilities as part of new office and retail developments.

Policy CE-5.7 Use easements and/or rights-or-way along flood control channels, public utilities, railroads, and streets wherever possible for bikeways and equestrian and hiking trails.

Policy CE-6.1 Provide primary truck routes on selected arterial streets that will serve the business community while minimizing the impacts of through truck traffic into residential areas.

Policy CE-6.2 Provide appropriately designed and maintained roadways in accordance with local, state, and federal standards for truck routes so that they can safely accommodate truck travel.

Policy CE-6.3 Develop appropriate treatments along local truck routes to minimize noise and vibration impacts on sensitive land uses that are adjacent to or impacted by the truck route.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-11
Policy CE-6.4 Ensure that new development provides adequate on-site truck loading facilities and enforce prohibition of queuing of trucks on public streets or in other areas not intended for such uses.

Policy CE-6.6 Strive to minimize through truck traffic in residential neighborhoods and other areas not intended for such travel, and enforce City codes that restrict or prohibit trucks on certain streets.

Policy CE-7.3 Encourage employers to include strategic parking provisions in new developments, where feasible, to encourage the use of transit and other modes of travel rather than single-occupancy autos.

Policy CE-7.4 Accommodate joint use of parking facilities as part of an area plan or site plan, based on the peak parking demands of permitted uses in the planning area.

Land Use Element
Policy LU-1.2 Emphasize the development of uses that sustain Corona as a cohesive, distinct, and self- sustaining community and minimize the need for residents to travel to surrounding communities for retail goods, services, and employment.

Policy LU-6.1 Promote sustainable features in new construction and significant renovations, including the use of locally sourced, recycled, and sustainable-sourced building materials, energy- and water-efficient building design, integrated renewable energy and energy storage systems, and waste minimization during construction.

Policy LU-6.2 Require that new residential, commercial, office, and industrial development be designed to minimize consumption of and sustain scarce environmental resources through:
• Site design—concentration and intermixing of development to minimize vehicular trips and promote walking and building orientation for solar access and heat gain and loss. • Landscaping—drought-tolerant species, use of recycled water for irrigation, and other purposes.
• Capture of rainwater and re-use on site.
• Building design and construction materials—energy-and water efficient fixtures, recycled building materials, insulation and wall thickness, permeable paving surfaces, and comparable techniques.

Policy LU-10.6 Establish a multi-use trail system that connects the rural and estate neighborhoods adjoining open spaces and parklands. These may be developed for pedestrians, bicycles, and/or for horseback riding where allowed by zoning.

Policy LU-11.6 Require that transit-supporting facilities, such as bus turnouts, passenger drop-offs, and shelters, be incorporated in new commercial centers or when subject to major

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-12
renovation and improvement, where appropriate to support local, citywide, and regional transit systems. The location and type of facility should be coordinated with transit agencies.

Policy LU-12.7 Regulate the development of industrial uses (consistent with local regulation and state law) that use, store, produce, or transport toxic and hazardous materials; generate unacceptable levels of air or noise pollution; or result in other adverse impacts.

Policy LU-13.2 Limit retail commercial and professional office uses within a mixedresidential- commercial/office use development to those uses that are compatible with residential uses.

Policy LU-13.3 Require that adequate open space and, for larger projects, recreational facilities be incorporated into mixed-use development projects to meet the need of their residents and improve overall aesthetics.

Healthy Community Element
Policy HC-2.5 Require the preparation of air quality, noise, and vibration technical studies to determine the impact of proposed new development on adjacent and surrounding land uses and to identify the appropriate measures required to mitigate such impacts.

Housing Element (2021-2029)
Policy H-1.2 Promote specific plans and zoning map amendments that provide a variety of housing types and densities based on the suitability of the land, including the availability of infrastructure, the provision of adequate City services and recognition of environmental constraints.

Policy H-1.4 Support the development of sustainable projects that reduce demand for water and energy resources, reduce commute times and operational costs, and provide for transitoriented development.

Environment Resources Element
Policy ER-12.1 Promote and encourage alternate employment work schedules for public- and private-sector businesses to achieve a reduction of employee-related motor vehicle emissions in accordance with SCAQMD Rule 2202.

Policy ER-12.2 Continue to cooperate with the SCAQMD and other local authorities in the air basin, in implementing air emission reduction programs and techniques.

Policy ER-12.3 Establish and strictly enforce controls on land use activities that contain operations or materials that individually or cumulatively add significantly to the degradation of air quality in Corona.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-13
Policy ER-12.6 Support major commercial centers and employment center projects, having 100 or more employees, to incorporate transit amenities, access points, and van and carpool parking as part of the project.

Policy ER-12.8 Require new commercial and industrial development and redevelopment projects of sufficient scale and number of employees to provide adequate facilities for bicycles, such as bicycle racks located close to the front entranceways of buildings and shower facilities with lockers.

Policy ER-12.9 Continue to incorporate bicycle lanes in all new and upgrade roadway projects in order to encourage commuter bicycle trips. Also, improve existing bicycle lanes for greater user safety.

Policy ER-12.11 Require that large-scale master-planned residential communities incorporate pedestrian and cycling paths/trails that link with adjacent neighborhoods, schools, areas of shopping and employment, community centers, other places of activity, and transit access points.

Policy ER-12.12 Provide effective utility of pedestrian and cycling paths/trails and place strong limitations on intrusions into these rights-of-way used for pedestrian and bicycling.

Policy ER-12.13 Reduce particulate emissions from paved and unpaved roads, parking lots, and road and building construction through the implementation of best practices as deemed feasible by the City of Corona.

Policy ER-12.14 Reduce energy consumed by commercial and residential uses by requiring the use and installation of energy conservation features in all new construction projects and wherever feasible, retrofitting existing and redevelopment projects.

Policy ER-13.2 Encourage the maximum feasible energy efficiency in site design, building orientation, landscaping, and utilities/infrastructure for all development and redevelopment projects (residential, commercial, industrial, and public agency) to support GHG emissions reductions.

Policy ER-13.3 Evaluate opportunities to reduce energy use and the urban heat island effect through site and building design, materials and landscaping, such as reflective roofs or pavement, vegetated roofs, pervious pavement, shade trees, and re-vegetation of paved areas.

Policy ER-13.4 Support the increase of clean energy supply to existing and new development and municipal facilities through means to include, but not be limited to: onsite or other local renewable energy sources for new and existing buildings and infrastructure.

Policy ER-13.5 Increase use of clean fuel and electric vehicles in the city through the support of the installation of electric vehicle infrastructure; explore opportunities to incentivize and/or facilitate installation of electric vehicle charging stations at convenient locations in Corona.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-14
Policy ER-13.6 Reduce solid waste sent to the landfills and associated community-wide GHG emissions by ensuring all properties have access to curbside solid waste, recycled materials, and green/organic waste programs; target special programs for construction debris, household hazardous waste, etc.

Policy ER-13.7 Support a wide variety of transportation related measures (e.g., active transportation, increased bus and rail transit, transportation system and demand management, etc.) as articulated in the Circulation Element to reduce the number of vehicle miles traveled in Corona.

Infrastructure and Utilities Element
Policy IU-7.7 Encourage the reduction of energy consumption through passive solar building orientation as well as the installation of rooftop solar energy systems and energyefficient technologies.

4.3.5 PROJECT DESIGN FEATURES
No Project Design Features are proposed for the Modified Project.

4.3.6 THRESHOLDS OF SIGNIFICANCE
Based on the relevant CEQA Guidelines as currently implemented by the City of Corona, significant air quality impacts would occur if the proposed Project or any Project-related component would:

Threshold AQ-1 Conflict with or obstruct implementation of the applicable air quality plan?
Threshold AQ-2 Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard? Threshold AQ-3 Expose sensitive receptors to substantial pollutant concentrations? Threshold AQ-4 Result in other emissions (such as those leading to odors) adversely affecting a substantial number of people?

METHODOLOGY
Air quality impacts were assessed in accordance with methodologies recommended by CARB and the SCAQMD. The latest version of CalEEMod (v2022.1), which was released by the SCAQMD in conjunction with CAPCOA and other California air quality districts in May 2022, was used to determine construction and operational air quality emissions of the Modified Project. CalEEMod is a statewide land use emissions computer model designed to quantify potential criteria pollutant emissions associated with both construction and operations from a variety of land use projects. Project construction-generated air pollutant emissions were

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-15
calculated using CalEEMod model defaults for Orange County. Construction of the proposed Project is anticipated to start in the first quarter of 2024 and the first phase (PAs 1, 2, and 3) would be completed and operational by 2024 and buildout of the Project (phase one plus PAs 4 and 5) operational by third quarter of 2025. Operational air pollutant emissions were based on the proposed Project site plans and the estimated traffic trip generation rates from the Green River Ranch Specific Plan Amendment, SP00-001 Amendment No.1, Traffic Analysis, dated June 10, 2024, and prepared by Urban Crossroads (Appendix S).

4.3.7 ENVIRONMENTAL IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Impacts
Would the
Modified
Project result
in new or
more severe
impacts
requiring
revisions to
the Prior
EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions to
the Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the
Modified Project
requiring
revisions to the
Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

AQ-1 Conflict with or obstruct
implementation of the
applicable air quality
plan?
AQ-2 Result in a cumulatively
considerable net
increase of any criteria
pollutant for which the
project region is nonattainment under an
applicable federal or
state ambient air quality
standard?
AQ-3 Expose sensitive
receptors to substantial
pollutant
concentrations?
AQ-4 Result in other emissions
(such as those leading to
odors) adversely
affecting a substantial
number of people?

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-16

IMPACTS ASSOCIATED WITH THE MODIFIED PROJECT
Impact AQ-1: Conflict with or obstruct implementation of the applicable air quality plan?
The Modified Project result in new or more severe impacts requiring revisions to the 2001 EIR.

Projects are considered consistent with the AQMP if the growth in socioeconomic factors (e.g., population, employment) is consistent with the underlying regional plans used to develop the AQMP. The future emissions forecasts are primarily based on demographic and economic growth projections provided by SCAG. Thus, demographic growth forecasts for various socioeconomic categories developed by SCAG in their current 2020-2045 RTP/SCS were in turn used to estimate future emissions by SCAQMD in their current 2022 AQMP (SCAQMD 2022).

Pursuant to SCAQMD’s consistency analysis guidelines contained in their CEQA Air Quality Handbook, consistency with the AQMP is affirmed when a project: (1) does not increase the frequency or severity of an air quality standards violation or cause a new violation; and (2) is consistent with the growth assumptions in the AQMP.

AQMP Consistency Criterion 1: The Modified Project would result in long-term operational pollutant emissions that exceed CEQA significance emissions thresholds established by SCAQMD, as demonstrated below; therefore, the proposed Modified Project would result in an increase in the frequency or severity of existing air quality violations or cause or contribute to new violations or delay the timely attainment of air quality standards or the interim emissions reductions specified in the AQMP. A detailed discussion of this conclusion follows.

As shown below in Table 4.3-1, the Modified Project construction-source emissions would exceed SCAQMD regional thresholds for NOX emissions. However, with implementation of Mitigation Measure, MM AQ-1 as presented in Section 4.3.10, the Modified Project construction source emissions impacts would be reduced to less than significant as shown in Table 4.3-2. Implementation of MM AQ-1 requires that all grading construction contractors ensure offroad diesel construction equipment complies with EPA/CARB Tier 4 Interim emissions standards or equivalent and ensure that all construction equipment is tuned and maintained in accordance with the manufacturer’s specifications. As a result, the Modified Project would not exceed the applicable regional significance thresholds for construction activity with mitigation incorporated. Thus, construction activities related to the Modified Project would be consistent with the first criterion.

As shown below in Table 4.3-3, the Modified Project’s long-term operational activities would exceed summer VOC emissions thresholds and NOX emissions thresholds for both summer and winter. As a result, the Modified Project has the potential to exceed the applicable regional

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-17
significance thresholds during operational activities. The Modified Project is required to comply with SCAQMD Rule 2305, the Warehouse Indirect Source Rule, which requires owners and operators associated with warehouses 100,000 square feet or larger are required to directly reduce NOX and PM emissions, or to otherwise facilitate emission and exposure reductions of these pollutants in nearby communities. As such, the Modified Project would be required to incorporate Mitigation Measures, MM AQ-2 through MM AQ-5 to reduce operational-related emissions, specifically designed to improve truck efficiency. However, the estimated long-term operational emissions generated under full buildout of the Modified Project would exceed the SCAQMD’s regional operational significance thresholds. In addition, Project operational-source VOC emissions during summer cannot be definitively reduced below applicable SCQMD thresholds and therefore would therefore exceed regional operational significance thresholds.

The proposed Project’s main operational-source emissions source would be generated by passenger cars and trucks accessing the Modified Project, and no feasible mitigation beyond the measures to be implemented exist that would reduce Project operational-source VOC and NOX emissions to levels that are less than significant. As a result, the Modified Project would conflict with the AQMP according to this criterion.

AQMP Consistency Criterion 2: The Modified Project would not exceed the growth assumptions in the AQMP. The 2022 AQMP demonstrates that the applicable ambient air quality standards can be achieved within the timeframes required under federal law. Growth projections from local general plans adopted by cities in the district are provided to SCAG, which develops regional growth forecasts, which are then used by SCAQMD to develop future air quality forecasts for the AQMP. The Approved Project land uses are consistent with the City’s GP and are therefore consistent with the AQMP growth projections. The Modified Project’s land uses are less intense than the Approved Project, and therefore are also consistent with the AQMP growth projections.

Per the City’s General Plan, PAs 1, 2, and 3 are designated for MU2 and GC uses, and PAs 4 and 5 are designated for MU2 and ER in accordance with the Approved Project. The MU2 land use designation allows for light industrial and commercial uses. The GC land use designation allows for the development of supermarkets, department stores, apparel stores, theaters, and nonretail uses such as offices and banks. The ER land use designation includes the development of single-family homes, light agriculture uses, and accessory buildings. The Modified Project’s proposed uses and development would be consistent with the land use designation intensities stated in the General Plan and the Approved Project (i.e., the GRRSP.

The Project would exceed the applicable SCAQMD regional thresholds for operational-source activity for emissions of summer VOC and NOX. Even with implementation of feasible mitigation, this threshold exceedance is considered significant and unavoidable. Thus, the Modified Project would have the potential to conflict with the second criterion.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-18
As previously discussed, Modified Project operational-source emissions would exceed the applicable SCAQMD regional thresholds for summer VOC and NOX with mitigation incorporated. In addition, the Project’s proposed land use designation for the GRRSP Planning Area would potentially affect the development intensities. As a result, the Project would conflict with the AQMP and result in a significant and unavoidable impact.

In summary, the Modified Project would result in a new increase in the frequency or severity of existing air quality violations or cause or contribute to new violations or delay the timely attainment of air quality standards or the interim emissions reductions specified in the AQMP.

The Modified Project would result in new or more severe impacts in comparison to those identified for the Approved Project in the 2001 EIR.

Mitigation Measure
The Modified Project introduces the following Mitigation Measures and are further described in detail Section 4.3.10.
• MM AQ-1 through AQ-5
Impact AQ-2: Result in a cumulatively considerable net increase of any criteria pollutant for which the project region is non-attainment under an applicable federal or state ambient air quality standard? Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The CAAQS designate the Modified Project area as nonattainment for O3, PM10, and PM2.5 while the NAAQS designates the Modified Project area as nonattainment for O3 and PM2.5. As presented in the AQIA , the analysis assumes that individual projects that do not generate operational or construction emissions that exceed the SCAQMD’s recommended daily thresholds for project specific impacts would also not cause a cumulatively considerable increase in emissions for those pollutants for which SCAB is in nonattainment, and, therefore, would not be considered to have a significant, adverse air quality impact. Alternatively, individual project-related construction and operational emissions that exceed SCAQMD thresholds for project-specific impacts would be considered cumulatively considerable.

Construction Impacts
As detailed in the AQIA , the estimated maximum daily construction emissions without mitigation are summarized on Table 4.3-1 below. Under the assumed scenarios, emissions resulting from the Modified Project construction will exceed thresholds established by the SCAQMD for emissions of NOX during construction activity. The exceedance is a result of on-site equipment operations occurring during the 2024 grading activities.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-19
Table 4.3-1: Overall Construction Emissions Summary – Without Mitigation Phase
Emissions (lbs/day)
VOC NOX CO SOX PM10 PM2.5
Summer
2024 33.76 105.22 77.06 0.30 16.80 7.77
2025 14.03 40.35 46.59 0.07 4.47 2.44
Winter
2024 33.63 106.55 72.64 0.30 16.80 7.90
2025 4.12 37.58 33.46 0.06 7.83 4.52
Maximum Daily Emissions 33.76 106.55 77.06 0.30 16.80 7.90 SCAQMD Regional Threshold 75 100 550 150 150 55
Threshold Exceeded? NO YES NO NO NO NO
Source: Urban Crossroads, 2024 (Appendix C-1)
The estimated maximum daily construction emissions with mitigation are summarized on Table 4.3-2 below. As presented above in Impact AQ-1, implementation of MM AQ-1 would be required to reduce the severity of the impacts from construction equipment. As a result, construction-source emissions would be reduced below the applicable SCAQMD thresholds.

Therefore, with implementation of MM AQ-1, Modified Project construction-source emissions would be less than significant with mitigation.

Table 4.3-2: Overall Construction Emissions Summary – With Mitigation Phase
Emissions (lbs/day)
VOC NOX CO SOX PM10 PM2.5
Summer
2024 33.76 69.91 82.95 0.30 13.62 4.86
2025 14.03 40.35 46.59 0.07 4.47 2.44
Winter
2024 33.63 71.24 82.26 0.30 13.62 7.90
2025 4.12 37.58 33.46 0.06 7.83 4.52
Maximum Daily Emissions 33.76 71.24 82.95 0.30 13.62 7.90 SCAQMD Regional Threshold 75 100 550 150 150 55
Threshold Exceeded? NO NO NO NO NO NO
Source: Urban Crossroads, 2024 (Appendix C-1)

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-20
Operational Impacts
Operational activities associated with the Project will result in emissions of VOCs, NOX, SOX, CO, PM10, and PM2.5. Operational emissions are expected from the following primary sources:
• Area Source Emissions
• Energy Source Emissions
• Mobile Source Emissions
• On-Site Cargo Handling Equipment Emissions
• Transportation Refrigeration Unit (TRU) Emissions
• Gasoline Dispensing Emissions
Table 4.3-3: Summary of Peak Operational Emissions – Without Mitigation Phase
Emissions (lbs/day)
VOC NOX CO SOX PM10 PM2.5
Summer
Mobile Source 35.63 59.42 282.46 0.95 67.91 18.03
Area Source 25.13 0.78 35.92 0.01 0.10 0.08
Energy Source 0.35 6.36 5.22 0.04 0.48 0.48
Stationary Sources 4.92 13.76 12.55 0.02 0.72 0.72
On-site Equipment 0.35 1.13 49.33 0.00 0.09 0.08
TRU Source 12.56 13.33 1.50 0.00 0.48 0.44
Fueling Station Source 1.22 0.00 0.00 0.00 0.00 0.00
Total Maximum Daily
Emissions

80.17 94.77 386.99 1.01 69.79 19.85
SCAQMD Regional Threshold 55 55 550 150 150 55
Threshold Exceeded? YES YES NO NO NO NO
Winter
Mobile Source 33.37 62.85 241.24 0.91 67.91 18.03
Area Source 19.40 0.48 0.20 0.00 0.04 0.04
Energy Source 0.35 6.36 5.22 0.04 0.48 0.48
Stationary Sources 4.92 13.76 12.55 0.02 0.72 0.72
On-site Equipment 0.35 1.13 49.33 0.00 0.09 0.08

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-21
TRU Source 12.56 13.33 1.50 0.00 0.48 0.44
Fueling Station Source 1.22 0.00 0.00 0.00 0.00 0.00
Total Maximum Daily
Emissions 72.18 97.90 310.06 0.97 69.73 19.80
SCAQMD Regional Threshold 55 55 550 150 150 55
Threshold Exceeded? YES YES NO NO NO NO
Source: Urban Crossroads, 2024 (Appendix C-1)
As shown above in Table 4.3-3, the Modified Project’s operational‐source NOX emissions will exceed applicable SCAQMD regional thresholds without implementation of mitigation resulting in a significant impact requiring mitigation.

As previously stated in Impact AQ-1, the Modified Project would be required to incorporate Mitigation Measures, MM AQ-2 through MM AQ-5 to reduce operational-related emissions.

The estimated maximum daily operational emissions with mitigation are summarized on Table

4.3-4 below.

Table 4.3-4: Summary of Peak Operational Emissions – With Mitigation Phase
Emissions (lbs/day)
VOC NOX CO SOX PM10 PM2.5
Summer
Mobile Source 35.63 59.42 282.46 0.95 67.91 18.03
Area Source 25.13 0.78 35.92 0.01 0.10 0.08
Energy Source 0.35 6.36 5.22 0.04 0.48 0.48
Stationary Sources 4.92 13.76 12.55 0.02 0.72 0.72
On-site Equipment 0.35 1.13 49.33 0.00 0.09 0.08
TRU Source 12.56 13.33 1.50 0.00 0.48 0.44
Fueling Station Source 1.22 0.00 0.00 0.00 0.00 0.00
Total Maximum Daily
Emissions

79.81 93.64 337.66 1.01 69.70 19.77
SCAQMD Regional Threshold 55 55 550 150 150 55
Threshold Exceeded? YES YES NO NO NO NO
Winter

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-22
Mobile Source 33.37 62.85 241.24 0.91 67.91 18.03
Area Source 19.40 0.48 0.20 0.00 0.04 0.04
Energy Source 0.35 6.36 5.22 0.04 0.48 0.48
Stationary Sources 4.92 13.76 12.55 0.02 0.72 0.72
On-site Equipment 0.35 1.13 49.33 0.00 0.09 0.08
TRU Source 12.56 13.33 1.50 0.00 0.48 0.44
Fueling Station Source 1.22 0.00 0.00 0.00 0.00 0.00
Total Maximum Daily
Emissions

71.83 96.77 260.72 0.97 69.64 19.72
SCAQMD Regional Threshold 55 55 550 150 150 55
Threshold Exceeded? YES YES NO NO NO NO
Source: Urban Crossroads, 2024 (Appendix C-1)
As shown above in Table 4.3-4, the Modified Project’s operational‐source NOX emissions will exceed applicable SCAQMD regional thresholds with implementation of mitigation resulting in a significant impact requiring mitigation. As stated in the AQIA, no feasible mitigation beyond the measures to be implemented exist that would reduce Project operational-source VOC and NOX emissions to levels that are less than significant. As a result, the Modified Project would result in a significant and unavoidable impact.

As discussed previously, the 2001 EIR determined the Approved Project would produce construction-related impacts from NOx and PM10 emissions and operational-related emissions from CO, ROC, and NOx that would be significant and unavoidable even with implementation of all feasible mitigation measures. Therefore, no new impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR.

However, additional mitigation measures MM AQ-1 through MM AQ-5 have been identified for the Modified Project to reduce impacts from construction and operations of the Modified Project to the fullest extent feasible.

Mitigation Measure
The Modified Project introduces the following Mitigation Measures and are further described in detail Section 4.3.10.
• MM AQ-1 through MM AQ-5
Impact AQ-3: Expose sensitive receptors to substantial pollutant concentrations? Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-23
Localized Impact Analysis
The AQIA includes a Localized Significance Threshold (LST) analysis based on SCAQMD methodology. The analysis quantified localized impacts (maximum daily emissions) for all nearest sensitive and non-sensitive receptors compared to the thresholds established by the SCAQMD. Consistent with LST Methodology, the LST emissions were calculated using an air dispersion model because the Project exceeds five acres.

During the peak phases of construction, the LST analysis determined no exceedances of SCAQMD thresholds would occur as shown in Table 4.3-5. Impacts would be less than significant. Notwithstanding, implementation of Mitigation Measure MM AQ-1 would further reduce localized emissions in Planning Areas 1, 2, and 3.

Table 4.3-5: Localized Significance Summary of Peak Construction – Without Mitigation Peak Construction
CO NO2 PM10 PM2.5
Averaging Time
1-Hour 8-Hour 1-Hour 24-Hours 24-Hours
Peak Day Localized Emissions 0.02 0.01 1.43E-02 0.59 0.34 Background ConcentrationA 1.70 1.20 0.085 NA NA
Total Concentration 1.72 1.21 0.10 0.59 0.34
SCAQMD LSTB 20 9 0.18 10.4 10.4
Threshold Exceeded? NO NO NO NO NO
A Highest concentration from the last three years of available data. Per SCAQMD LST guidance, PM10 and PM2.5 background concentrations are not considered. B Significance thresholds are based on SCAQMD’s Air Quality Significance Thresholds for Ambient Air Quality Standards for Criteria Pollutants.

Note: PM10 and PM2.5 background concentrations are expressed in ug/m3. All others are expressed in ppm.

Source: Urban Crossroads, 2024 (Appendix C-1)
The LST operational analysis generally includes on-site sources (area, energy, mobile, TRUs, and on-site cargo handling equipment). The Modified Project operational emissions would not exceed the numerical localized thresholds of significance established by the SCAQMD for any criteria pollutant as shown below in Table 4.3-6. Thus, a less than significant impact would occur for localized Project-related operational-source emissions, and no mitigation is required.

Table 4.3-6: Localized Significance Summary of Peak Operations – Without Mitigation Peak Construction
CO NO2 PM10 PM2.5
Averaging Time
1-Hour 8-Hour 1-Hour 24-Hours 24-Hours
Peak Day Localized Emissions 1.96E-02 8.31E-03 3.33E-03 0.15 0.05

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-24
Background ConcentrationA 1.70 1.20 0.085 NA NA
Total Concentration 1.72 1.21 0.09 0.15 0.05
SCAQMD LSTB 20 9 0.18 2.5 2.5
Threshold Exceeded? NO NO NO NO NO
A Highest concentration from the last three years of available data. Per SCAQMD LST guidance, PM10 and PM2.5 background concentrations are not considered.

B Significance thresholds are based on SCAQMD’s Air Quality Significance Thresholds for Ambient Air Quality Standards for Criteria Pollutants.

Note: PM10 and PM2.5 background concentrations are expressed in ug/m3. All others are expressed in ppm.

Source: Urban Crossroads, 2024 (Appendix C-1)
CO Hot Spot Analysis
The AQIA conducted a CO hot spot analysis to determine if the Modified Project's vehicular traffic additions would result in CO concentrations at nearby roadways and intersections that would result in a violation of ambient air quality standards. It has long been recognized that CO hotspots are caused by emissions from vehicles idling at congested intersections. As vehicle emissions standards have become increasingly stringent resulting in the replacement of older vehicles by newer vehicles in the vehicle fleet, plus the introduction of cleaner burning fuels, CO is now designated as attainment in the SCAB. The AQIA determined the Modified Project along with background and cumulative development would not produce the volume of traffic required to generate a CO hot spot based on empirical data derived from a 2003 Los Angeles hot spot study and based on representative Bay Area AQMD CO threshold considerations. Localized air quality impacts related to CO hot spots from the Modified Project’s mobile-source emissions would therefore be less than significant.

Health Risk Analysis Impacts
The Health Risk Assessment (HRA) prepared for the Modified Project evaluated potential health risk impacts to nearby sensitive receptors. The nearest sensitive receptors are the existing homes and residents to the east/southeast of the GRRSP Planning Area off Dominguez Ranch Road and workers associated with future development of the proposed Project. Health risk impacts result from exposure to Toxic Air Contaminants (TACs) including diesel particulate matter (DPM) as a result of heavy-duty diesel trucks accessing the site. The analysis was conducting in accordance with the SCAQMD’s Health Risk Assessment Guidance for Analyzing Cancer Risks from Mobile Source Diesel Idling Emissions for CEQA Air Quality Analysis. DPM emissions concentrations were calculated using the EPA’s AERMOD dispersion model using site specific, area climate, and Project inputs. Project data inputs include the detailed construction assumptions for each phase of the Modified Projects development contained in the AQIA. The phases analyzed were: Phase 1 = 746,167 sf of BPI uses in PAs 1, 2, 3; Phase 2 = Phase 1 plus 19,600 sf of GC uses in PA 4; Phase 3 = Phase 2 plus 32 ER DUs in PA 5.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-25
The individual land use with the maximum exposure to emissions from a project is referred to as the maximally individual receptor (MEIR). The MEIR the proposed Project’s construction and operational DPM source emissions was identified as the backyard of an existing residence on San Viscaya Circle approximately 246 feet east of PAs 1, 2 and 3. As shown in Table 4.3- 5, the maximum incremental cancer risk at the MEIR attributable to the proposed Project construction and operational DPM source emissions is estimated at 5.14 in one million, which is less than SCAQMD’s risk threshold of 10 in one million. Also shown in Table 4.3-5, noncancer risks were estimated to be 0.003 at the MEIR, which is less than SCAQMD’s hazard risk threshold of 1.0. The Modified Project will not cause a significant human health or cancer risk to adjacent land uses as a result of construction and operational activity. All other receptors during construction and operational activity would experience less risk than what is identified for this location. Health risk impacts from the Modified Project’s DPM emissions would therefore be less than significant and no mitigation is required.

Table 4.3-5: Summary of Construction and Operational Cancer and Non-Cancer Risks Time Period Location
Maximum
Lifetime Cancer
Risk (Risk per
Million)
Significance
Threshold
(Risk per
Million)
Exceeds
Significance
Threshold
30 Year
Exposure Maximum Exposed Sensitive Receptor 5.14 10 NO
Time Period Location Maximum Hazard
Index
Significance
Threshold
Exceeds
Significance
Threshold
Annual Average Maximum Exposed Sensitive Receptor 0.003 1.0 NO Source: Urban Crossroads, 2024 (Appendix C-1)
As discussed previously, the 2001 EIR determined the Approved Project would not result in emissions that would affect sensitive receptors. The Modified Project would not result in CO hot spot impacts, construction-related LST impacts from NOx and PM10 emissions, or operational-related LST impacts from CO, ROC, and NOx emissions. In addition, the Modified Project would not result in health risk impacts to nearby sensitive receptors. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Friant Ranch Case
The California Supreme Court held in 2018 that air quality analyses in an EIR must address the connection between identified air quality impacts to the human health consequences of the identified air quality impacts, or meaningfully explain why such an analysis cannot be provided given correlation of a project’s criteria air pollutant emissions to specific health impacts is challenging. SCAQMD expressed at the time it may be “difficult to quantify health impacts

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-26
for criteria pollutants,” an important opinion coming from one of the State’s are districts with the most sophisticated air quality modeling and health impact evaluation capabilities. Using O3 as an example, SCAQMD expressed why it is impracticable to determine specific health outcomes from criteria pollutants for all but very large, regional-scale projects. First, forming O3 “takes time and the influence of meteorological conditions for these reactions to occur, so ozone may be formed at a distance downwind from the sources.” Second, “it takes a large amount of additional precursor emissions (NOX and VOCs) to cause a modeled increase in ambient ozone levels over an entire region,” referencing a 2012 study showing that “reducing NOX by 432 tons per day (157,680 tons/year) and reducing VOC by 187 tons per day (68,255 tons/year) would reduce ozone levels at the SCAQMD’s monitor site with the highest levels by only 9 parts per billion.”
SCAQMD concluded it “does not currently know of a way to accurately quantify ozone related health impacts caused by NOX or VOC emissions from relatively small projects.” The San Joaquin Valley Unified Air Pollution Control District (SJVUAPCD) ties the difficulty of correlating the emission of criteria pollutants to health impacts to how ozone and particulate matter are formed, stating that “[b]ecause of the complexity of ozone formation, a specific tonnage amount of NOX or VOCs emitted in a particular area does not equate to a particular concentration of ozone in that area.” Similarly, the quantity of particulate matter “emitted does not always equate to the local PM concentration because it can be transported long distances by wind,” and “[s]econdary PM, like ozone, is formed via complex chemical reactions in the atmosphere between precursor chemicals such as sulfur dioxides (SOX) and NOX,” meaning that “the tonnage of PM-forming precursor emissions in an area does not necessarily result in an equivalent concentration of secondary PM in that area.” The disconnect between the amount of precursor pollutants and the concentration of ozone or PM formed makes it difficult to determine potential health impacts, which are related to the concentration of ozone and PM experienced by the receptor rather than levels of NOX, SOX, and VOCs produced by a source.

Most local agencies lack the data to do their own assessment of potential health impacts from criteria air pollutant emissions, as would be required to establish customized, locally specific thresholds of significance based on potential health impacts from an individual development project. The use of national or “generic” data to fill the gap of missing local data would not yield accurate results because such data does not capture local air patterns, local background conditions, or local population characteristics, all of which play a role in how a population experiences air pollution. Because it is impracticable to accurately isolate the exact cause of a human disease (for example, the role a particular air pollutant plays compared to the role of other allergens and genetics in cause asthma), existing scientific tools cannot accurately estimate health impacts of the proposed Project’s air emissions without undue speculation.

Instead, readers are directed to the proposed Project’s air quality impact analysis above, which provides extensive information concerning the quantifiable and non-quantifiable health risks related to the Project’s construction and long-term operation.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-27
The LST analysis above determined the proposed Project would not result in emissions exceeding SCAQMD’s LSTs. Therefore, the proposed Project would not be expected to exceed the most stringent applicable federal or state ambient air quality standards for emissions of CO, NOX, PM10, and PM2.5.

As the proposed Project’s emissions will comply with federal, state, and local air quality standards, the proposed Project’s emissions are not sufficiently high enough to use a regional modeling program to correlate health effects on a basin-wide level and would not provide a reliable indicator of health effects if modeled.

Mitigation Measure
The Modified Project introduces the following Mitigation Measures and are further described in detail Section 4.3.10.
• MM AQ-1
Impact AQ-4: Result in other emissions (such as those leading to odors) adversely affecting a substantial number of people?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As discussed in the AQIA, the Modified Project has the potential to generate objectionable odors from construction and operation related activities. Potential odor sources associated with construction related activities from the Modified Project may result from construction equipment exhaust and the application of asphalt and architectural coatings during construction activities. However, standard construction requirements would minimize odor related impacts from construction activities and equipment. Furthermore, the construction odor emissions would be temporary, short-term, and intermittent in nature and would cease upon completion of the respective phase of construction. Therefore, construction odor related impacts are considered to be less than significant.

Land use operations that are generally associated with objectional odor complaints include:
• Agricultural uses (livestock and farming)
• Wastewater treatment plants
• Food processing plants
• Chemical plants
• Composting operations
• Refineries
• Landfills
• Dairies
• Fiberglass molding facilities

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-28
As stated in the AQIA, potential odor related sources during operation of the Modified Project would primarily occur from development of Phase 2 which includes the super convenience gas station (with 12 vehicle fueling stations). Additionally, the refuse that would be stored in covered containers and removed at regular intervals in compliance with the solid waste regulations would be a potential odor related source. Pursuant to SCAQMD Rule 461 the proposed gas station land use would be required to utilize gas dispensing equipment that minimizes vapor and liquid leaks. Furthermore Rule 461 requires the equipment be maintained at proposed worker odor, which will minimize odor impacts occurring from the gasoline and diesel dispensing facilities. With required compliance of SCAQMD Rule 402 and Rule 461, odors associated with the Modified Project construction and operations would be less than significant and no mitigation is required. The 2001 determined the Approved Project would result in less than significant and no mitigation was required. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

4.3.8 CUMULATIVE IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
As stated within the AQIA, individual project-related construction and operational emissions that exceed SCAQMD thresholds for project-specific impacts would be considered cumulatively considerable. Due to the Modified Project’s construction-source air pollutant emissions not resulting in exceedances of regional thresholds with implementation of mitigation, cumulative impacts are considered to be less than significant. Alternatively, the Modified Projects operational‐source NOX emissions would exceed applicable SCAQMD regional thresholds. Per SCAQMD significance guidance, these impacts at the Project level are considered cumulatively significant and would persist over the life of the Project. The 2001 EIR determined the Approved Project would result in cumulatively considerable construction impacts from emission of NOx that would contribute to regional ozone formation. The 2001 EIR determined both long-term stationary (on-site energy consumption) and mobile (vehicular traffic) sources would contribute to regional criteria pollutant emissions, resulting in a cumulatively considerable impact. Therefore, no new or substantially greater cumulative impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-29

4.3.9 MITIGATION MEASURES IDENTIFIED IN PRIOR EIR APPLICABLE TO

MODIFIED PROJECT
The following 2001 EIR mitigation measures reduce air pollutants generated during the Project construction phase.

4.3.1A: The Construction Contractor shall select the construction equipment used on site based on low emission factors and high energy efficiency. The Construction Contractor shall ensure that construction grading plans include a statement that all construction equipment will be tuned and maintained in accordance with the manufacturer's specifications.

4.3.1B: The Construction Contractor shall utilize electric or diesel-powered equipment in lieu of gasoline-powered engines where feasible.

4.3.1C: The Construction Contractor shall ensure that construction grading plans include a statement that work crews will shut off equipment when not in use.

During smog season (May through October), the overall length of the construction period should be extended, thereby decreasing the size of the area prepared each day, to minimize vehicles and equipment operating at the same time.

4.3.1D: The Construction Contractor shall time the construction activities so as to not interfere with peak hour traffic and minimize obstruction of through traffic lanes adjacent to the site; if necessary, a flag person shall be retained to maintain safety adjacent to existing roadways.

4.3.1E: The Construction Contractor shall support and encourage ridesharing and transit incentives for the construction crew.

4.3.1F: Dust generated by the development activities shall be retained on site and kept to a minimum by following the dust control measures listed below:
a. During clearing, grading, earth moving, excavation, or transportation of cut or fill materials, water trucks or sprinkler systems shall be used to prevent dust from leaving the site and to create a crust after each day's activities cease.
b. During construction, water trucks or sprinkler systems shall be used to keep all areas of vehicle movement damp enough to prevent dust from leaving the site. At a minimum, this would include wetting down such areas in the later morning and after work is completed for the day, and whenever wind exceeds 15 miles per hour.
c. After clearing, grading, earth moving, or excavation is completed, the entire area of disturbed soil shall be treated immediately by pickup of the soil until

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-30
the area is paved or otherwise developed so that dust generation will not occur.
d. Soil stockpiled for more than two days shall be covered, kept moist, or treated with soil binders to prevent dust generation.
e. Trucks transporting soil, sand, cut or fill materials and/or construction debris to or from the site shall be tarped from the point of origin.

4.3.1G: The Construction Contractor shall utilize as much as possible precoated/natural colored building materials, water-based or low-VOC coating, and coating transfer or spray equipment with high transfer efficiency, such as high volume low pressure (HVLP) spray method, or manual coatings application such as paint brush, hand roller, trowel, spatula, dauber, rag, or sponge.

4.3.2A: The project shall comply with Title 24 of the California Code of Regulations established by the Energy Commission regarding energy conservation standards. The project applicant shall incorporate the following in building plans:
• Planting trees to provide shade and shadow to building. • Solar or low-emission water heaters shall be used with combined space/water heater unit.
• Refrigerator with vacuum power insulation.
• Double-pained glass or window treatment for energy conservation shall be used in all exterior windows.
• Energy-efficient low-sodium parking lot lights shall be used.

4.3.2B: Use of transportation demand measures (TDM) such as preferential parking for vanpooling/carpooling, subsidy for transit pass or vanpooling/carpooling, flextime work schedule, bike racks, lockers, showers, and on-site cafeteria shall be incorporated in the design of the commercial land uses.

4.3.2C: The project proponent shall determine with the City and the electrical purveyor if it is feasible to pre-wire houses for electrical charges for EV cars and/or opticfibers for home offices. If feasible, install EV charges and/or optic-fibers per the electrical purveyor's direction prior to Certificate of Occupancy.

4.3.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT The Modified Project introduces the following Mitigation Measures and are further described in detail below. No feasible mitigation measures beyond MM AQ-2 through MM AQ-5 exist that would reduce project-related operational emissions to levels that are less than significant.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

AIR QUALITY

ENPLANNERS

4.3-31
MM AQ-1: During grading of Planning Areas 1, 2, and 3, all Construction Contractors shall ensure that offroad diesel construction equipment complies with Environmental Protection Agency (EPA)/CARB Tier 4 Interim emissions standards or equivalent and shall ensure that all construction equipment is tuned and maintained in accordance with the manufacturer’s specifications.

MM AQ-2: Legible, durable, weather-proof signs shall be placed at truck access gates, loading docks, and truck parking areas that identify applicable CARB antiidling regulations. At a minimum, each sign shall include: 1) instructions for truck drivers to shut off engines when not in use; 2) instructions for drivers of diesel trucks to restrict idling to no more than five (5) minutes once the vehicle is stopped, the transmission is set to "neutral" or "park," and the parking brake is engaged; and 3) telephone numbers of the building facilities manager and the CARB to report violations. Prior to the issuance of a certificate of occupancy, the Lead Agency (City of Corona) shall conduct a site inspection to ensure that the signs are in place.

MM AQ-3: Prior to tenant occupancy for Planning Areas 1, 2 and 3, the Project Applicants or successors in interest shall provide documentation to the Lead Agency (City of Corona) demonstrating that occupants/tenants of the Project site have been provided documentation on funding opportunities, such as the Carl Moyer Program, that provide incentives for using cleaner-than-required engines and equipment.

MM AQ-4: The minimum number of automobile electric vehicle (EV) charging stations required by the California Code of Regulations (CCR) Title 24 shall be provided. Final designs of Project buildings shall include electrical infrastructure sufficiently sized to accommodate the potential installation of additional auto and truck EV charging stations.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

AIR QUALITY

ENPLANNERS

4.3-32
This Page Intentionally Left Blank

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-1

4.4 BIOLOGICAL RESOURCES

4.4.1 INTRODUCTION
This section of the Draft SEIR assesses the potential impacts associated with biological resources from the implementation of the Proposed Project. The impact discussions for each specific impact topic include a comparison to the impacts evaluated for the Approved Project consistent with the conditions detailed in CEQA Guidelines 15162 regarding a Subsequent EIR. The discussion describes the regulatory framework and existing conditions, identifies criteria used to determine impact significance, provides an analysis of the potential impacts associated with biological resources, and identifies methods to mitigate any potentially significant impacts of the Proposed Project.

This section of the Draft SEIR is based on the Biological Technical Report for the Green River Specific Plan, prepared by Glenn Lukos Associates, Inc. dated April 2, 2024 (Appendix E-1); Determination of Biologically Equivalent or Superior Preservation (DBESP) Analysis for impacts to MSHCP Riparian/Riverine Area Green River Ranch Industrial Project, prepared by Glenn Lukos Associates, Inc. dated August 29, 2024 (Appendix E-2); and Western Riverside County Multiple Species Habitat Conservation Plan Consistency Analysis, prepared by Glenn Lukos Associates, Inc. dated August 29, 2024 (Appendix E-3).

4.4.2 SUMMARY OF IMPACTS AND MITIGATION MEASURES FROM THE 2001 EIR
The 2001 EIR determined the Approved Project would result in less than significant impacts to: wildlife movement and wildlife corridors; conflicts with any local policies or ordinances protecting biological resources; and conflicts with adopted conservation plan. Impacts to:
migratory birds (MM 4.7.3A and 4.7.3B); federal waters and state streambed and riparian habitat (4.7.2A); and natural communities (MM 4.7.4A and 4.7.4B) were determined to be less than significant with implementation of mitigation. Impacts to endangered species and removal of associated habitat were determined to be significant and unavoidable even with implementation of all feasible mitigation (MM 4.7.1A). The Biological impact analysis related to biological resources is summarized below based on the checklist questions in place at that time.
a) Have a substantial adverse effect, either directly or indirectly or through habitat modification, on any species listed as threatened or endangered under the California or the federal endangered species act or on any species that can be shown to meet the criteria for such listing?
and;

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-2
f) Conflict with the provisions of an adopted habitat conservation plan, natural community conservation plan, or other approved local, regional, or state habitat conservation plan.

Sensitive Species
The 2001 EIR found implementation of the Approved Project could result in short-term impacts during construction from the loss of individual sensitive species members and loss of habitat. The species identified onsite were the San Diego horned lizard, golden eagle, sharpshinned hawk, Cooper’s hawk, loggerhead shrike, and southern California rufous-crowned sparrow. Several other sensitive wildlife species were found to have a moderate potential to occur on site but these species were not seen on site. Because these species were not protected by federal or state listings as threatened or endangered and any loss of individuals would not threaten their regional populations, removal of their habitat was determined to be a less than significant impact.

Listed Species
The 2001 EIR found implementation of the Approved Project could result in the take of an endangered species in the form of direct loss (i.e., complete or partial removal) of at least one California gnatcatcher individual and approximately 8 acres of habitat used by the species.

Such take could result from harassment and harm to the species from being displaced and habitat being graded during lawful grading and construction of the Approved Project. The Approved Project was also found to result in the loss of critical habitat as identified by the USFWS for the California gnatcatcher.

These affects were considered to be a significant impact requiring mitigation. To mitigate such affects, the 2001 EIR required implementation of Mitigation Measure MM 4.7.1A that would replace destroyed California gnatcatcher habitat of equal or greater quality at a minimum ratio of 1:1. The Approved Project would impact 8 acres of California gnatcatcher habitat, and therefore MM 4.7.1A required acquisition and preservation of at least 8 acres of habitat in a location that would facilitate management for the species (i.e., supports the species and contiguous with a larger area managed for conservation of the species).

It should be noted the 2001 EIR determined the Approved Project would also remove many common plants, however these are abundant elsewhere and expected to recover. Thus, impacts were determined to be less than significant.
b) Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, regulations or by the CDFG or the USFWS.
and;

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-3
e) Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance.

The 2001 EIR stated development of the Approved Project would result in the direct removal of individual Coast Live Oaks and reduction in approximately 3.90 acres of Coast Live Oak Woodland Communities. Consequently, the 2001 EIR determined impacts to individual oak trees and the reduction of overall Coast Live Oak Woodland Communities would be significant. To minimize such impacts, the 2001 EIR implemented Mitigation Measures MM

4.7.4A thru 4.7.4E of which required the Approved Project to prioritize clustering development and create an oak management plan that includes ongoing maintenance, access limitations, and transplanting opportunities. Additionally, the Approved Project would replant oak trees at a 10:1 ratio to compensate for any lost trees. As such, the 2001 EIR determined impacts to coast live oak woodlands would be reduced to a less than significant level with implementation of Mitigation Measures MM 4.7.4A thru 4.7.4E.
c) Have a substantial adverse effect on federally protected wetlands as defined by Section 404 of the Clean Water Act (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other means.

The 2001 EIR determined development of the Approved Project would result in the loss of Army Corps of Engineers (Corps) defined jurisdictional waters and California Department of Fish and Game (CDFG) defined jurisdictional streambed and related riparian habitat; therefore, impacts were considered significant due to the cumulative linear distance of stream impact and the complete filling of direct tributaries to the Santa Ana River. CDFG changed its name after certification of the 2001 EIR and is now known as the California Department of Fish and Wildlife (CDFW). CDFW will be referenced from this point forward.

The 2001 EIR stated implementation of the Approved Project would result in the loss of 1.76 acres of Corps jurisdictional waters and 9.81 acres of CDFW jurisdictional streambed and associated riparian habitat and approximately 15,350 linear feet of ephemeral streambed within the GRRSP area. The Approved Project would fill all of the on-site streambeds in the form of manufactured slopes. As previously stated, these impacts in the 2001 EIR were determined significant requiring implementation of Mitigation Measure 4.7.2A. MM 4.7.2A would replace any riparian habitat lost due to the Approved Project. Additionally, MM 4.7.2A required the Approved Project to either create new habitat on-site at a 1.5:1 ratio (e.g., creating

1.5 acres for every 1 acre lost) or purchase credits at a 2:1 ratio from an off-site mitigation bank. The created habitat must be permanent and any oak woodlands established for other mitigation measures can also count towards this goal if placed in riparian areas. Finally, MM

4.7.2A stated the Approved Project would likely need permits from wildlife and water quality agencies due to the impact on riparian habitat.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-4
In conclusion, the 2001 EIR determined impacts to jurisdictional waters were reduced to a less than significant level with implementation of Mitigation Measure MM 4.7.2A, and additional mitigation measures may be imposed by the Corps, CDFW, and Regional Water Quality Control Board (RWQCB) during their respective permitting/approval processes. d) Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native or resident migratory wildlife corridors, or substantially diminish wildlife habitat.

Migratory Wildlife
The 2001 EIR determined development of the Approved Project would disturb or destroy active migratory bird nests, a violation of the Migratory Bird Treaty Act, therefore, creating a potentially significant impact.

Although no nests were observed, the 2001 EIR determined the Approved GRRSP area supports a variety of tall trees (native and non-native) that could potentially support nesting birds, particularly raptors. Consequently, disturbing or destroying active nests is a violation of the Migratory Bird Treaty Act and was determined to be a significant adverse impact.

The 2001 EIR required the implementation of Mitigation Measures MM 4.7.3A and MM

4.7.3.B (Alternative) to protect nesting birds during construction of the Approved Project. This mitigation required the Approved Project to either conduct pre-construction surveys to identify and avoid active nests during nesting season (March-July), or simply delay tree removal and grading activities until after the nesting season is over. The 2001 EIR determined impacts to migratory bird nesting were reduced to a less than significant level with implementation of either Mitigation Measure MM 4.7.3A or 4.7.3B (Alternative).

Wildlife Corridor
The 2001 EIR determined the GRRSP area would not likely be used as a regional wildlife movement corridor and impacts to the site as a result of the Approved Project would not significantly impact regional wildlife movement. Biologists concluded that the GRRSP area was unlikely to be a corridor as the northern portion of the property itself is developed and lacks vegetation, and the surrounding freeways, railroads, and residential and commercial development block wildlife movement. The 2001 EIR concluded the larger undisturbed Coal Canyon with year-round water and diverse habitats is a more suitable path for wildlife traveling between the Santa Ana Mountains and Chino Hills open spaces. The 2001 EIR determined impacts to be less than significant.

Cumulative Impacts
The 2001 EIR stated that as many as 25 sensitive wildlife species, including the California gnatcatcher, (discussed above) could be reasonably expected or demonstrated to occur on the Approved Project site in a resident, seasonal, migratory or transient basis, utilizing coastal sage

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-5
scrub, chaparral, oak woodland, and grassland habitats. The 2001 EIR found that the project would have some impact on sensitive habitats and streambeds, and while the impact on individual species might be small, the overall effect on these resources would be significant.

Furthermore, the 2001 EIR stated the regional loss and fragmentation of coastal sage scrub habitat led to the 1993 listing of the California gnatcatcher as a Threatened species under the federal ESA. The 2001 EIR concluded that the Approved Project would significantly reduce habitat for various sensitive coastal plant and animal species, with efforts to mitigate the impact on the California gnatcatcher, the overall effect on such resources would remain significant and unavoidable even with implementation of mitigation.

4.4.3 ENVIRONMENTAL SETTING
The Modified Project site is located within the western portion of the City and consist of approximately 175 acres of various vegetation communities. Due to the topography of the property, development has historically been limited to the northern portion of the site. The property slopes to the north toward Green River Road. The southern portion of the site is dominated by the rugged hillside terrain of the Santa Ana Mountains. Northerly trending ridges with intervening northerly drainage tributary canyons flow from the high terrain. As these canyons descend to the north into the Study Area, the canyons transition to narrow streambeds that ultimately discharge to series of pipes and culverts on the south side of Green River Road. The central portion of the site contains several low foothills and deeply incised drainages, while the northern portion of the property is characterized by gently sloping to flat terrain. Elevations within the Project site range from approximately 525 feet above mean sea level (MSL) at Green River Road to over 2,500 feet above MSL in the southcentral portions.

The Modified Project area is located south of SR 91, southwest of Dominguez Ranch Road, and southeast of Fresno Road. Green River Road bisects a small portion of the GRRSP Planning Area in an east-west alignment. The Modified Project site is bounded by undeveloped land on the north, partially developed land to the east, the 91 Freeway to the west, and undeveloped land to the south. Further to the south, is the Cleveland National Forest. The Open Space and Estate Residential portions of the Project are located within the foothills of the Santa Ana Mountains. The BPI portion of the Modified Project is located at the base of these foothills.

Plant Community/Habitat Classification
Vegetation is similar to that outlined within the 2001 EIR. The Study Area supports the following MSHCP vegetation and land-cover types: Riparian Scrub, Woodland, Forest/Riverine Vegetation, Coastal Sage Scrub, Chaparral, Desert, Developed/Disturbed Land, and Grassland. Within the Riparian Scrub, Woodland, Forest/Riverine Vegetation classification, there are two different vegetation alliances: Coast Live Oak Woodland and Elderberry Stands. For the Coastal Sage Scrub classification, the following alliances are

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-6
present: Coastal Sage Scrub and Riversidean Sage Scrub/Mixed Chaparral. In the Chaparral classification there are four alliances: Disturbed Mixed Chaparral, Lower Montane Mixed Chaparral, Mixed Chaparral, Southern Mixed Chaparral. In the Desert classification there is one alliance: Saltbush Scrub. The Grassland classification is vegetated by Non-native Grassland. The description of the natural communities is provided below and on Table 4.4-1 and in Figure 4.4.1.

Table 4.4-1: Natural Communities within the Project site and Offsite Improvements Natural Community Onsite Project Site
(Acres)
Offsite
Improvements
(Acres)
Scrub Communities
Coastal Sage Scrub 1.27 1.15
Saltbush Scrub 0.25 0.76
Chaparral Communities
Riversidean Sage Scrub/Mixed Chaparral 1.90 0.00
Mixed Chaparral 41.69 0.00
Disturbed Mixed Chaparral 15.59 0.03
Southern Mixed Chaparral 3.45 0.00
Lower Montane Mixed Chaparral 0.94 0.00
Grassland Communities
Ruderal/Non-Native Grassland 69.37 1.64
Woodland Communities
Elderberry Savannah 0.55 0.26
Coast Live Oak Woodland 4.74 0.00
Disturbed or Developed Areas
Disturbed/Developed 18.29 10.94
Residential/Urban/Exotic 1.78 0.52
Total 159.82 15.30
PAGE: 4.4-7
FIGURE 4.4-1: PROJECT VEGETATION MAP
SOURCE: GLENN LUKOS ASSOCIATES, 2024.

LEGEND
Specific Plan Boundary (Onsite)
Offsite Improvements
Coast Live Oak Woodland
Coastal Sage Scrub
Disturbed Mixed Chaparral
Disturbed/Developed
Elderberry Savannah
Lower Montane Mixed Chaparral
Mixed Chaparral
Residential/Urban/Exotic
Riversidean Sage Scrub/Mixed Chaparral
Ruderal/Non-native grassland
Saltbush Scrub
Southern Mixed Chaparral

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-8
This Page Intentionally Left Blank

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-9
Coastal Sage Scrub
The Study Area supports approximately 2.42 acres of coastal sage scrub within the southwestern Project boundary and north of Green River Road, of which 1.27 acres are within the Specific Plan (onsite) and 1.15 acres are located in the offsite improvement areas. This plant community is dominated with California sagebrush (Artemisia californica), California brittlebush (Encelia californica), California buckwheat (Eriogonum fasciculatum), occasional individuals or small patches of deerweed (Acmispon glaber), and non-native grasses in the understory.

Saltbush Scrub
The Study Area supports approximately 1.01 acres of Southern Saltbush Scrub, of which 0.25 acre is within the Specific Plan (onsite) and 0.76 acre is located in the offsite improvement areas. This plant community occurs primarily on along the shoulders of Green River Road.

This plant community is dominated by big saltbush (Atriplex lentiformis), with laurel sumac, California buckwheat, California sagebrush, California brittlebush, and coyote bush (Baccharis pilularis).

Riversidean Sage Scrub/Mixed Chaparral
The Study Area contains 1.90 acres of Riversidean Sage Scrub/Mixed Chaparral, all of which is in the Specific Plan (onsite). This plant community occurs primarily within the southern portions of the Study Area. This plant community is dominated primarily with deerweed (Acmispon glaber), black sage (Salvia mellifera), and California sagebrush.

Mixed Chaparral
The Study Area supports approximately 41.69 acres of Mixed Chaparral, all of which is in the Specific Plan (onsite). This plant community occurs primarily on the southern portion of the Study Area. This plant community is dominated by laurel sumac, California sagebrush, California buckwheat, and chaparral yuca.Disturbed Mixed Chaparral The Study Area supports approximately 15.62 acres of Disturbed Mixed Chaparral, of which

15.59 acres are within the Specific Plan (onsite) and 0.03 acre is located in the offsite improvement areas. This plant community occurs primarily within the southwestern Project boundary. This plant community is dominated by laurel sumac (Malosma laurina), lemonade berry (Rhus integrifolia), California sagebrush, California buckwheat, and chaparral yucca (Hesperoyucca whipplei).

Southern Mixed Chaparral
The Study Area supports approximately 3.45 acres of Southern Mixed Chaparral, all of which is in the Specific Plan (onsite). This plant community occurs primarily on the southern portion of the Study Area. This plant community is dominated by lemonade berry, chamise

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-10
(Adenostoma fasciculatum), California sagebrush, California buckwheat, laurel sumac, California buckwheat, and chaparral yucca.

Lower Montane Mixed Chaparral
The Study Area supports approximately 0.94 acre of Lower Montane Mixed Chaparral, all of which is in the Specific Plan (onsite). This plant community occur primarily within the western portion of the Study Area south of Fresno Road. This plant community is dominated by toyon (Heteromeles arbutifolia) in the shrub layer along with black sage (Salvia mellifera), and California sagebrush. The understory is sparsely vegetated.

Ruderal/Non-Native Grassland
The Study Area supports approximately 71.01 acres of Ruderal/Non-Native Grassland, of which 69.37 acres are within the Specific Plan (onsite) and 1.64 acres are located in the offsite improvement areas. This plant community is present throughout the Study Area. As such, this plant community is dominated by non-native ruderal species including red brome (Bromus madritensis ssp. rubens), Russian thistle (Salsola tragus), foxtail barley (Hordeum murinum), Mediterranean grass (Schismus barbatus), black mustard (Brassica nigra), tocalote (Centaurea melitensis), and coastal heron’s bill (Erodium cicutarium).

Elderberry Savannah
The Study Area supports approximately 0.81 acre of Elderberry Savannah, of which 0.55 acre is within the Specific Plan (onsite) and 0.26 acre is located in the offsite improvement areas.

This plant community occurs within the northern portions of the Study Area just north of Green River Road in the offsite Commercial Development. This plant community is dominated with blue elderberry (Sambucus nigra ssp. caerulea) with a non-native grasses in the understory.

Coast Live Oak Woodland
The Study Area supports approximately 4.74 acres of coast live oak woodland near the southern and eastern Project boundary, all of which is in the Specific Plan (onsite). This plant community is dominated with coast live oak (Quercus agrifolia) with non-native grasses in the understory. This plant community is riparian vegetation associated with drainage features.

Disturbed/Developed
The Study Area supports approximately 29.23 acres of disturbed/developed lands, of which

18.29 acres are within the Specific Plan (onsite) and 10.94 acres are located in the offsite improvement areas. This land-cover type occurs primarily within the northern portions of the Study Area. Developed areas are areas where human disturbance has resulted in permanent modification of the existing landscape. These include paved areas, equestrian uses, Green River Road, and buildings. As such, this land cover type does not represent a natural plant community.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-11
Residential/Urban/Exotic
The Study Area contains 2.30 acres of Residential/Urban/Exotic vegetation, of which 1.78 acres are within the Specific Plan (onsite) and 0.52 acre is located in the offsite improvement areas. Residential/Urban/Exotic vegetation includes areas where the vegetation predominately consists of introduced or escaped non-native horticultural plants, including trees, shrubs, flowers, and turf grass. This plant community occurs primarily along Green River Road, the eastbound SR-91 onramp, and along Dominguez Ranch Road. This plant community include eucalyptus (Eucalyptus sp.), Peruvian pepper tree (Schinus molle), and fountain grass (Pennisetum setaceum).

Sensitive Plant Surveys
Similar to the 2001 EIR, sensitive plant surveys were conducted concurrently with other survey efforts for the Modified Project and in accordance with published survey guidelines. Sensitive plant species include those listed as threatened or endangered or candidates for listing by USFWS, CDFW, and listed by CNPS as extinct, rare, threatened, or endangered (CNPS list 1A, 1B, and 2). Because the Project lies within the potential Quino checkerspot butterfly (QCB) range, exhaustive survey efforts were undertaken to identify any potential host plant species for the QCB. The level of detail necessary to identify those host plants also led to a thorough survey for all sensitive plant species potentially occurring on the subject property.

Plant surveys were focused within all habitat communities on site. All plant species observed were recorded in field notes.

Several sensitive plant species were reported in the Biological Technical Report (Appendix D1) as potentially existing in the region. Table 4-3 in Appendix D-1 provides a complete list of sensitive plant species and likelihood of presence/absence within the Study Area. However, none of the sensitive plant species were observed on the within the development footprint.

Coast live oaks woodland occurs on site (4.74 acres) in the easterly and the centrally located drainages of the property.

Waters of the U.S. and Wetlands
A jurisdictional wetlands and waters of the U.S. assessment of the Project site was conducted according to the methods outlined in the Corps Wetland Delineation Manual (1987). Nonwetland waters of the U.S. were delineated based on the limits of the an ordinary high water mark (OHWM) as determined by erosion, the deposition of vegetation or debris, and changes in vegetation. The CDFW jurisdiction was defined to the bank of the stream/channels or to the limit of the adjacent riparian vegetation.

Jurisdictional features addressed within the Study Area include three major drainage systems, referred to herein as Drainage Systems A, B, and C. Each of these systems includes several small tributaries that feed into the larger drainages and are sometimes connected to the system

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-12
by non-jurisdictional swale-like features that do not possess an OHWM or obvious bed, bank, or channel. There is also a small drainage feature located north of Green River Road that is referred to herein as Drainage D. Drainage C contained a pocket of riparian vegetation in an upper reach. The vegetation consists of mature coast live oak, arroyo willow (Salix lasiolepis), red willow (Salix laevigata), Fremont cottonwood (Populus fremontii), and black cottonwood (Populus balsamifera).

All drainages are identified as being ephemeral.

Identified within the three major drainage systems and their respective tributaries, the RWQCB jurisdiction totals 18,838 linear feet, of which 467 linear feet occurs offsite. The total acreage of RWQCB jurisdiction is 3.03 acres, of which 0.06 acres occurs offsite. No Corps jurisdiction was identified. The existing Corps and RWQCB jurisdictional drainages are shown on Figure

4.4-2.

Identified within the three major drainage system and their respective tributaries, total CDFW jurisdiction is 8,838 linear feet, of which 467 linear feet occurs offsite. The total acreage of CDFW jurisdiction is 8.30 acres, of which 0.10 acres occurs offsite. Of the 8.30 acres of CDFW jurisdiction, a total of 4.66 acres is identified as riparian habitat. The existing CDFW jurisdictional drainages are shown on Figure 4.4-3.

Identified within the three major drainage system and their respective tributaries, total Riparian/Riverine MSHCP jurisdiction is 8.30 acres, of which 0.10 acres occurs offsite. Of the

8.30 acres, 3.64 acres is considered MSHCP Riverine habitat, and 4.66 acres is considered MSHCP Riparian habitat. The existing Riparian/Riverine jurisdictional drainages are shown on Figure 4.4-4.

General Wildlife Inventory
General wildlife surveys were conducted concurrent with all site investigations. Animals identified during the diurnal field surveys by sight, call, tracks, nests, scat, remains, or other signs were recorded. In addition to species observed on the property, species expected to use the site were derived from analysis of habitats on the site and known preferences of regionally occurring wildlife species were listed as potentially present on the property.

The property is located along the southern edge of a significant natural area, which surrounds the Santa Ana River in the western most edge of Riverside County. The area is labeled as site number RIV 14 by the CDFW (Significant Natural Areas of Riverside County, 1999).

Wildlife species common to the region and habitat types occurring on site are expected or observed to be present on site. Special status species observed during the Biological and focused surveys include least Bell’s vireo, Crotch’s bumble bee, yellow warbler, and Southern California rufous-crowned sparrow.

FIGURE 4.4-2: RWQCB JURISDICTIONAL DRAINAGES
PAGE: 4.4-13
LEGEND
SOURCE: GLENN LUKOS ASSOCIATES, 2024.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-14
This Page Intentionally Left Blank
FIGURE 4.4-3: CDFW JURISDICTIONAL DRAINAGES
SOURCE: GLENN LUKOS ASSOCIATES, 2024. PAGE: 4.4-15
LEGEND

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-16
This Page Intentionally Left Blank
PAGE: 4.4-17
FIGURE 4.4-4: MSHCP JURISDICTIONAL DRAINAGES
SOURCE: GLENN LUKOS ASSOCIATES, 2024.

LEGEND

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-18
This Page Intentionally Left Blank

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-19
Wildlife species observed as well as those expected to occur within the study area are summarized in Appendix B of the Biological Resources Assessment (Appendix E-1 to this Supplemental EIR).

Regional Connectivity / Wildlife Movement Corridor Assessment The Project site and adjacent lands support the movement of multiple mammalian species, including mountain lion, mule deer, bobcat, coyote, and grey fox, utilizing an extension system of ridges, canyons, and trails. The Project site occurs within an area that the MSHCP identifies as Proposed Constrained Linkage 1 (PCL-1). PCL-1 is intended to connect Existing Core A (north of the Project site) with Existing Core B to the south and is expected to provide for movement of mountain lion, bobcat, and other wildlife. However, the northern portion of PCL1 contains multiple constraints to wildlife movement, including SR-91, the Burlington Northern Santa Fe (BNSF) railroad line, and Green River Road. Because of these constraints and the presence of an important wildlife movement area to the west (referred to as “B Canyon”), the RCA, Wildlife Agencies, and the City of Corona have for a number of years discussed the possibility of relocating PCL-1 to the west to coincide with the B Canyon area.

However, because the B Canyon lands have until recently been privately owned, it was not possible to accomplish a Criteria Refinement necessary to formally re-designate the Linkage, referred to within this document as the Alternative Alignment of PCL-1. Recently the RCA completed the acquisition of approximately 740 acres of lands located south and west of the Specific Plan Project that coincide with B Canyon. Concurrent with the land acquisition, GLA submitted a Criteria Refinement Analysis via the City of Corona to the RCA to support the formal relocation of PCL-1. The RCA issued Criteria Refinement Review Findings (CR# 24- 01-10-01, dated February 20, 2024) in support of the Criteria Refinement and those (Appendix D-4).

RCA and Wildlife Agencies have conceptually approved the Refinement Criteria and Alternative Alignment of PCL-1 (Appendix D-4). Additional information and environmental analysis of the Alternative Alignment of PCL-1 can be found in Section 5.0.

In further support of the assembly of PCL-1, the Project conserves 80.77 acres of land within the southern half of the Project site. The proposed conservation is contiguous with the lands recently acquired by the RCA for the MSHCP Reserve. The 80.77 acres of proposed conservation contains the structural topography and vegetative cover to facilitate regional wildlife movement. It also aligns with the wildlife linkage/corridor conservation goals of the MSHCP.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-20

4.4.4 EXISTING REGULATIONS, PLANS, PROGRAMS, AND POLICIES

FEDERAL
Federal Endangered Species Act
The Federal Endangered Species Act (FESA) of 1973 defines an endangered species as “any species that is in danger of extinction throughout all or a significant portion of its range.” A threatened species is defined as “any species that is likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range.” Under provisions of Section 9(a)(1)(B) of the FESA it is unlawful to “take” any listed species. “Take” is defined in Section 3(18) of FESA: “...harass, harm, pursue, hunt, shoot, wound, kill, trap, capture, or collect, or to attempt to engage in any such conduct.” Further, the USFWS, through regulation, has interpreted the terms “harm” and “harass” to include certain types of habitat modification that result in injury to, or death of species as forms of “take.” These interpretations, however, are generally considered and applied on a case-by-case basis and often vary from species to species. In a case where a property owner seeks permission from a federal agency for an action that could affect a federally listed plant and animal species, the property owner and agency are required to consult with USFWS. Section 9(a)(2)(b) of the FESA addresses the protections afforded to listed plants.

Section 7 of the ESA outlines the procedures for Federal interagency cooperation to conserve Federally listed species and designated critical habitat. Section 7 of the Act requires federal agencies to consult with the USFWS on proposed actions which may affect threatened or endangered species or which may affect critical habitat. Section 7 also requires federal agencies to confer with the USFWS if the agency determines that its action is likely to jeopardize the continued existence of any proposed species or result in the destruction or adverse modification of proposed critical habitat. This consultation may take place in two steps:

1. Informal consultation is an optional process that includes all discussions, correspondence, etc. between the USFWS and the federal agency or a designated non-federal representative. Informal consultation is designed to assist the involved agencies in determining whether an action may affect a listed species. If the USFWS concurs that an action is not likely to adversely affect a listed species, Section 7 consultation ends. During informal consultation, the USFWS may suggest modifications to the action that the federal agency and/or permittee could make to avoid the likelihood of adverse effect.

2. If the project is likely to adversely affect a listed species, formal consultation between the USFWS and the federal agency is initiated. During formal consultation, the USFWS evaluates information relating to potential project effects on the listed species. At the conclusion of this evaluation, the USFWS formulates

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-21
a Biological Opinion as to whether the project is likely to jeopardize the continued existence of the listed species. If a "jeopardy opinion" is issued, the USFWS is to include reasonable and prudent alternatives to the federal action. In the case of a "no jeopardy opinion" (or with the implementation of reasonable and prudent alternatives), the USFWS may also issue an "incidental take" statement, which allows the incidental take of a listed species in accordance with terms and conditions specified in the Biological Opinion.

Section 10 of the ESA provides the regulatory mechanism which allows the incidental take of a listed species by private interests and non-federal government agencies during lawful land, water, and ocean use activities. Under these conditions habitat conservation plans (HCPs) for the impacted species must be developed, approved by the USFWS, and implemented by the permittee. It is the goal through the HCP to minimize impacts to the species and develop viable mitigation measures to offset the unavoidable impacts.

STATE
California Endangered Species Act
California’s Endangered Species Act (CESA) defines an endangered species as “a native species or subspecies of a bird, mammal, fish, amphibian, reptile, or plant which is in serious danger of becoming extinct throughout all, or a significant portion, of its range due to one or more causes, including loss of habitat, change in habitat, overexploitation, predation, competition, or disease.” The State defines a threatened species as “a native species or subspecies of a bird, mammal, fish, amphibian, reptile, or plant that, although not presently threatened with extinction, is likely to become an endangered species in the foreseeable future in the absence of the special protection and management efforts required by this chapter. Any animal determined by the commission as rare on or before January 1, 1985 is a threatened species.” Candidate species are defined as “a native species or subspecies of a bird, mammal, fish, amphibian, reptile, or plant that the commission has formally noticed as being under review by the department for addition to either the list of endangered species or the list of threatened species, or a species for which the commission has published a notice of proposed regulation to add the species to either list.” Candidate species may be afforded temporary protection as though they were already listed as threatened or endangered at the discretion of the Fish and Game Commission. Unlike the Federal Endangered Species Act (FESA), CESA does not list invertebrate species.

Article 3, Sections 2080 through 2085, of the CESA addresses the taking of threatened, endangered, or candidate species by stating “No person shall import into this state, export out of 18 this state, or take, possess, purchase, or sell within this state, any species, or any part or product thereof, that the commission determines to be an endangered species or a threatened species, or attempt any of those acts, except as otherwise provided.” Under the CESA, “take”

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-22
is defined as “hunt, pursue, catch, capture, or kill, or attempt to hunt, pursue, catch, capture, or kill.” Exceptions authorized by the state to allow “take” require permits or memoranda of understanding and can be authorized for endangered species, threatened species, or candidate species for scientific, educational, or management purposes and for take incidental to otherwise lawful activities. Sections 1901 and 1913 of the of the California Fish and Game Code provide that notification is required prior to disturbance.

State authorizations of impacts to or incidental take of a listed species by a private individual or other private entity would be granted as outlined within Sections 2090-2097 of the CESA.

This requires that the state lead agency consult with CDFW on projects with potential impacts on state-listed species. These provisions also require CDFW to coordinate consultations with USFWS for actions involving federally listed as 19 well as state-listed species. In certain circumstances, Section 2080.1 of the California Fish and Game Code allows CDFW to adopt the federal incidental take statement or the 10(a) permit as its own based on its findings that the federal permit adequately protects the species under state law.

Clean Water Act, Section 404
Pursuant to Section 404 of the Clean Water Act, the Corps regulates the discharge of dredged and/or fill material into waters of the United States. The term "waters of the United States" is defined in Corps regulations at 33 CFR Part 328.3(a) as:
(1) All waters which are currently used, or were used in the past, or may be susceptible to use in interstate or foreign commerce, including all waters which are subject to the ebb and flow of the tide;
(2) All interstate waters including interstate wetlands; (3) All other waters such as intrastate lakes, rivers, streams (including intermittent streams), mudflats, sandflats, wetlands, sloughs, prairie potholes, wet meadows, playa lakes, or natural ponds, the use, degradation or destruction of which could affect foreign commerce including any such waters:
(i) Which are or could be used by interstate or foreign travelers for recreational or other purposes; or
(ii) From which fish or shell fish are or could be taken and sold in interstate or foreign commerce; or
(iii) Which are used or could be used for industrial purpose by industries in interstate commerce...
(4) All impoundments of waters otherwise defined as waters of the United States under the definition;
(5) Tributaries of waters identified in paragraphs (a) (1)-(4) of this section; (6) The territorial seas;
(7) Wetlands adjacent to waters (other than waters that are themselves wetlands) identified in paragraphs (a) (1)-(6) of this section.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-23
(8) Waters of the United States do not include prior converted cropland. Notwithstanding the determination of an area's status as prior converted cropland by any other federal agency, for the purposes of the Clean Water Act, the final authority regarding Clean Water Act jurisdiction remains with the EPA.

Waste treatment systems, including treatment ponds or lagoons designed to meet the requirements of CWA (other than cooling ponds as defined in 40 CFR 123.11(m) which also meet the criteria of this definition) are not waters of the United States.

In the absence of wetlands, the limits of Corps jurisdiction in non-tidal waters, such as intermittent streams, extend to the OHWM which is defined at 33 CFR 328.3(e) as: ...that line on the shore established by the fluctuation of water and indicated by physical characteristics such as clear, natural line impressed on the bank, shelving, changes in the character of soil, destruction of terrestrial vegetation, the presence of litter and debris, or other appropriate means that consider the characteristics of the surrounding areas.

The term “wetlands” (a subset of “waters of the United States”) is defined at 33 CFR 328.3(b) as "those areas that are inundated or saturated by surface or ground water at a frequency and duration sufficient to support...a prevalence of vegetation typically adapted for life in saturated soil conditions." In 1987 the Corps published the Wetland Manual to guide its field personnel in determining jurisdictional wetland boundaries. The methodology set forth in the Wetland Manual and the Arid West Supplement generally require that, in order to be considered a wetland, the vegetation, soils, and hydrology of an area exhibit at least minimal hydric characteristics. While the Wetland Manual and Arid West Supplement provide great detail in methodology and allow for varying special conditions, a wetland should normally meet each of the following three criteria:
• More than 50 percent of the dominant plant species at the site must be hydrophytic in nature as published in the most current national wetland plant list; • Soils must exhibit physical and/or chemical characteristics indicative of permanent or periodic saturation (e.g., a gleyed color, or mottles with a matrix of low chroma indicating a relatively consistent fluctuation between aerobic and anaerobic conditions); and
• Whereas the Wetland Manual requires that hydrologic characteristics indicate that the ground is saturated to within 12 inches of the surface for at least five percent of the growing season during a normal rainfall year, the Arid West Supplement does not include a quantitative criteria with the exception for areas with “problematic hydrophytic vegetation”, which require a minimum of 14 days of ponding to be considered a wetland.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-24
Clean Water Act, Section 401
The California Regional Water Quality Control Board (RWQCB) is responsible for the administration of Section 401 of the Clean Water Act. RWQCB and each of its nine Regional Boards regulate the discharge of waste (dredged or fill material) into waters of the United States and waters of the state. Waters of the United States are defined above in Section II.A and waters of the state are defined as “any surface water or groundwater, including saline waters, within the boundaries of the state” (California Water Code 13050[e]).

The Project is within the jurisdiction of the Santa Ana RWQCB and will require a water quality certification or waiver. Section 401 of the CWA requires certification for any federal permit or license authorizing impacts to waters of the U.S. (i.e., waters that are within federal jurisdiction), such as Section 404 of the CWA and Section 10 of the Safe Rivers and Harbors Act, to ensure that the impacts do not violate state water quality standards. When a project could impact waters outside of federal jurisdiction, the Regional Board has the authority under the Porter-Cologne Water Quality Control Act to issue Waste Discharge Requirements (WDRs) to ensure that impacts do not violate state water quality standards. Clean Water Act Section 401 Water Quality Certifications, WDRs, and waivers of WDRs are also referred to as orders or permits.

California Fish and Wildlife Section 1600
Sections 1600-1603 of the California Fish and Game Code, the California Department of Fish and Wildlife (CDFW) regulates all diversions, obstructions, or changes to the natural flow or bed, channel, or bank of any river, stream, or lake, which supports fish or wildlife.

CDFW defines a stream (including creeks and rivers) as "a body of water that flows at least periodically or intermittently through a bed or channel having banks and supports fish or other aquatic life. This includes watercourses having surface or subsurface flow that supports or has supported riparian vegetation." CDFW's definition of "lake" includes "natural lakes or manmade reservoirs." CDFW also defines a stream as “a body of water that flows, or has flowed, over a given course during the historic hydrologic regime, and where the width of its course can reasonably be identified by physical or biological indicators.” It is important to note that the Fish and Game Code defines fish and wildlife to include: all wild animals, birds, plants, fish, amphibians, invertebrates, reptiles, and related ecological communities including the habitat upon which they depend for continued viability (FGC Division 5, Chapter 1, section 45 and Division 2, Chapter 1 section 711.2(a) respectively).

Furthermore, Division 2, Chapter 5, Article 6, Section 1600 et seq. of the California Fish and Game Code does not limit jurisdiction to areas defined by specific flow events, seasonal changes in water flow, or presence/absence of vegetation types or communities.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-25

REGIONAL
Western Riverside Multiple Species Habitat Conservation Plan The Western Riverside County Multiple Species Habitat Conservation Plan (MSHCP) was adopted on June 17, 2003, and an Implementing Agreement (IA) was executed between the federal and state wildlife agencies and participating entities. The MSHCP is a comprehensive habitat conservation-planning program for western Riverside County. The intent of the MSHCP is to preserve native vegetation and meet the habitat needs of multiple species, rather than focusing preservation efforts on one species at a time. As such, the MSHCP is intended to streamline review of individual projects with respect to the species and habitats addressed in the MSHCP, and to provide for an overall Conservation Area that would be of greater benefit to biological resources than would result from a piecemeal regulatory approach. The MSHCP provides coverage (including take authorization for listed species) for special-status plant and animal species, as well as mitigation for impacts to sensitive species pursuant to Section 10(a) of the FESA.

Through agreements with the U.S. Fish and Wildlife Service (USFWS) and the California Department of Fish and Wildlife (CDFW), the MSHCP designates 146 special-status animal and plant species that receive some level of coverage under the plan. Of the 146 “Covered Species” designated under the MSHCP, the majority of these species have no additional survey/conservation requirements. In addition, through project participation with the MSHCP, the MSHCP provides mitigation for project-specific impacts to Covered Species so that the impacts would be reduced to below a level of significance pursuant to CEQA. As noted above, project-specific survey requirements exist for species designated as “Covered Species not yet adequately conserved”. These include Narrow Endemic Plant Species, as identified by the Narrow Endemic Plant Species Survey Areas (NEPSSA); Criteria Area Plant Species identified by the Criteria Area Species Survey Areas (CASSA); animal species as identified by survey area; and plant and animal species associated with riparian/riverine areas and vernal pool habitats (Volume I, Section 6.1.2 of the MSHCP document).

For projects that have a federal nexus such as through federal Clean Water Act Section 404 permitting, take authorization for federally listed covered species would occur under Section 7 (not Section 10) of FESA and that USFWS would provide a MSHCP consistency review of the proposed project, resulting in a biological opinion. The biological opinion would require no more compensation than what is required to be consistent with the MSHCP.

LOCAL
City of Corona 2020–2040 General Plan
The City of Corona 2020–2040 General Plan includes several goals and policies relating to biological resources including:

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-26
Environmental Resources Element
Goal ER-4: Proper management of floodplain and riparian areas for their importance to wildlife habitat, unique and sensitive plant life, water recharge, and public health and safety.

Policy ER-4.4: Preserve and enhance existing native riparian habitat and prevent obstruction of natural watercourses to the extent feasible in new private and public developments or implement on-site replacement as mitigation.

Goal ER-5: Preservation and protection of natural and man-made wetlands from development impacts for their importance to wildlife habitat, unique and sensitive plant life, water recharge, and scenic value.

Policy ER-5.5: Prohibit the planting of invasive, nonnative species in areas that would encroach and affect watercourses, their banks, and riparian areas.

Goal ER-6: Protection, enhancement, and sustaining of significant plant and wildlife species and habitat that exist in Corona and its Planning Area, for the long-term benefit of the natural environment and Corona residents and visitors.

Policy ER-6.1: Support the rehabilitation and enhancement of the biological diversity, and integrity of the City’s natural resources through such means as vegetation restoration, control of alien plants and animals, landscape buffering, and natural watercourse channel restoration.

Policy ER-6.2: Preserve the wildlife and plant species and habitats listed in Tables 4- 12 and 4-13 of the Technical Background Report for the General Plan and EIR and those that may be considered by the City of Corona in the future.

Policy ER-6.3: Ensure that new developments and circulation improvements demonstrate compliance with state and federal regulations concerning the status, location, and condition of significant and sensitive biological species and habitats and riparian and riverine corridors. Biological surveys, as required and defined by the Western Riverside County Multiple Species Habitat Conservation Plan, should identify potential impacts on biological resources and include mitigation measures to protect/replace resources in like kind.

Policy ER-6.4: Ensure that new developments through the development review process adhere to the Western Riverside County Multiple Species Habitat Conservation Plan, the Stephens’ Kangaroo Rat Habitat Conservation Plan, and other habitat plans as appropriate to conserve biological diversity through protection of natural communities.

Policy ER-6.5: Preserve wildlife habitat of significant natural open space areas, including expanding habitat ranges, movement corridors, and nesting sites by adhering to and implementing the core biological linkages identified in the MSHCP for parts of the Temescal Canyon Area Plan in the City. Any proposed recreational use of those areas such as trails shall be designed to not interfere with the preservation efforts established in the MSHCP.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-27
Goal ER-7: Adequate protection of biological resources and increased public awareness of their value to the community.

Policy ER-7.1: Require that public and private construction activities be conducted in a manner to minimize adverse impacts on natural resources and biological resources in proximity to MSHCP conservation areas and adhere to the MSHCP Guidelines pertaining to Urban/Wildlife Interface for drainage, toxics, lighting, noise, invasive barriers and grading [MSHCP Section 6.1.4].

Goal ER-8: Protection, enhancement, and sustaining of significant plant and wildlife species and habitat that exist in Corona and its Planning Area, for the long-term benefit of the natural environment and Corona residents and visitors.

Policy ER-6.1: Support the rehabilitation and enhancement of the biological diversity, and integrity of the City’s natural resources through such means as vegetation restoration, control of alien plants and animals, landscape buffering, and natural watercourse channel restoration.

Goal ER-8: Protection of forest and vegetation resources in the City of Corona.

Policy ER-8.1: Cooperate with federal and state agencies to achieve the sustainable conservation of forest lands as a means of providing open space and protecting natural resources and MSHCP habitat.

Policy ER-8.4: Maintain and conserve superior examples of native trees (including oak trees), natural vegetation, stands of established trees, and other features for aesthetic and water conservation purposes.

Policy ER-8.5: Conserve the oak tree resources in the City to the extent feasible.

Goal ER-9: Protection of regional washes and waterways and their use for recreational and open space purposes such as trails, habitat preservation, and groundwater recharge.

Policy ER-9.1: Protect sensitive biological resources in the Temescal Canyon Area Plan through adherence to policies in the Western Riverside County MSHCP.

Policy ER-9.2: Conserve existing wetlands and wetland functions and values in the Temescal Canyon Wash, Prado Basin, and the Santa Ana River with a focus on conservation of existing riparian, woodland, coastal sage scrub, alluvial fan scrub, and open water habitats.

Policy ER-9.3: Conserve existing known populations of least Bell’s vireo and southwestern willow flycatcher within the Temescal Canyon Area Plan including locations at Prado Basin, Santa Ana River, and Temescal Wash. Maintain existing breeding habitat for these species at Prado Basin, Santa Ana River, and Temescal Wash where applicable to a particular project and location.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-28
Policy ER-9.4: Conserve and manage suitable habitat for species known to exist in the Temescal Canyon Area Plan of Western Riverside County’s Multiple Species Habitat Conservation Plan.

Policy ER-9.5: Conserve clay soils supporting sensitive plant species known to occur in the Temescal Canyon area, including Munz’s onion, Palmer’s grappling hook, smallflowered morning glory, long-spined spineflower, thread-leaved brodiaea, smallflowered microseris, and many-stemmed dudleya.

Policy ER-9.6: Conserve sandy soils co-occurring with chaparral supporting Palomar monkeyflower, known to occur in the Temescal Canyon area.

Policy ER-9.7: Conserve locations supporting California muhly, heart-lived pitcher sage, Hall’s monardella, and other sensitive plant species that may occur in a wide variety of habitat types within the Temescal Canyon Area Plan.

Policy ER-9.8: Provide for and maintain connection(s) from the Cleveland National Forest to Prado Basin and the Santa Ana River within Temescal Canyon, providing opportunities for offsite connections to Chino Hills State Park.

Policy ER-9.10: Conserve floodplain areas supporting sensitive plant species known to occur in Temescal Canyon, including Parry’s spineflower, peninsular spineflower, and smooth tarplant, and Coulter’s matilija poppy.

Policy ER-9.11: Conserve rocky soils co-occurring with coastal sage scrub, peninsular jumper, or chaparral supporting Payson’s jewelflower, known to occur in the Temescal Canyon area.

Policy ER-9.12: Provide for and maintain a continuous linkage along Temescal Wash from the southern boundary of the Temescal Canyon area to the Santa Ana River.

4.4.5 PROJECT DESIGN FEATURES
No biological resource project design features.

4.4.6 THRESHOLDS OF SIGNIFICANCE
Criteria for determining the significance of impacts related to biological resources are based on criteria contained in Appendix G of the State CEQA Guidelines and the City’s CEQA Manual. The proposed Project could have a significant impact on the environment if it would:

Threshold BIO-1 Have a substantial adverse effect, either directly or through habitat modifications, on any species identified as a candidate, sensitive, or special status species in local or regional plans, policies, or regulations, or by the California Department of Fish and Game or U.S. Fish and Wildlife Service?

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-29
Threshold BIO-2 Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, regulations or by the California Department of Fish and Game or U.S. Fish and Wildlife Service?
Threshold BIO-3 Have a substantial adverse effect on state or federally protected wetlands (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other means?
Threshold BIO-4 Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use of native wildlife nursery sites?
Threshold BIO-5 Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance? Threshold BIO-6 Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community Conservation Plan, or other approved local, regional, or state habitat conservation plan?

METHODOLOGY
The following analysis is based, in part, on information provided by the Biological Technical Report for the Green River Specific Plan, prepared by Glenn Lukos Associates, Inc. dated April 2, 2024 (Appendix D-1); Determination of Biologically Equivalent or Superior Preservation (DBESP) Analysis for impacts to MSHCP Riparian/Riverine Area Green River Ranch Industrial Project, prepared by Glenn Lukos Associates, Inc. dated April 11, 2024 (Appendix D-2); and Western Riverside County Multiple Species Habitat Conservation Plan Consistency Analysis, prepared by Glenn Lukos Associates, Inc. dated April 11, 2024 (Appendix D-3). The information obtained from these sources and other relevant materials was reviewed to evaluate the potential presence of biological resources on the Project site.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-30

4.4.7 ENVIRONMENTAL IMPACTS ASSOCIATED WITH MODIFIED

PROJECT
Impacts
Would the
Modified
Project result in
new or more
severe impacts
requiring
revisions to the
Prior EIR?
Would the
Modified
Project be
implemented
under changed
circumstances
resulting in new
or more severe
impacts
requiring
revisions to the
Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the
Modified
Project requiring
revisions to the
Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to impacts
and no changes to
the Prior EIR are
required?
Would the Project:

BIO-1 Have a substantial adverse
effect, either directly or
through habitat
modifications, on any
species identified as a
candidate, sensitive, or
special status species in
local or regional plans,
policies, or regulations, or
by the California
Department of Fish and
Game or U.S. Fish and
Wildlife Service.

BIO-2 Have a substantial adverse
effect on any riparian
habitat or other sensitive
natural community
identified in local or
regional plans, policies,
regulations or by the
California Department of
Fish and Game or U.S.

Fish and Wildlife Service.

BIO-3 Have a substantial adverse
effect on state or federally
protected wetlands
(including, but not limited
to, marsh, vernal pool,
coastal, etc.) through
direct removal, filling,
hydrological interruption,
or other means.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-31
Impacts
Would the
Modified
Project result in
new or more
severe impacts
requiring
revisions to the
Prior EIR?
Would the
Modified
Project be
implemented
under changed
circumstances
resulting in new
or more severe
impacts
requiring
revisions to the
Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the
Modified
Project requiring
revisions to the
Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to impacts
and no changes to
the Prior EIR are
required?
Would the Project:

BIO-4 Interfere substantially
with the movement of any
native resident or
migratory fish or wildlife
species or with established
native resident or
migratory wildlife
corridors, or impede the
use of native wildlife
BIO nursery sites. -5 Conflict with any local
policies or ordinances
protecting biological
resources, such as a tree
preservation policy or
ordinance.

BIO-6 Conflict with the
provisions of an adopted
Habitat Conservation
Plan, Natural Community
Conservation Plan, or
other approved local,
regional, or state habitat
conservation plan.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-32

IMPACTS ASSOCIATED WITH THE MODIFIED PROJECT
Impact BIO-1: Have a substantial adverse effect, either directly or through habitat modifications, on any species identified as a candidate, sensitive, or special status species in local or regional plans, policies, or regulations, or by the California Department of Fish and Game or U.S. Fish and Wildlife Service?
New information that would result in new or more severe impacts from the Modified Project requiring revisions to the Prior EIR.

As previously stated in the 2001 EIR, construction of the Approved Project would result in the loss of common plant species. One special status plant species was observed with the updated survey for the Modified Project and includes Coulter's matilija poppy. This species is a covered species under the MSHCP. This species is not a state or federally listed species, but is classified as Rank 4. As summarized in Table 3-1 of the Biological Study, Rank 4 species are currently thought to be limited in distribution or range whose vulnerability or susceptibility to threat is currently low. Given the low sensitivity of this species and the limited presence within the Modified Project site, impacts to the matilija poppy would be less than significant.

Three special-status birds were observed during the updated biological surveys for the Modified Project including yellow warbler, southern California rufous-crowned sparrow and least Bell’s vireo. The Project would impact habitat for the rufous-crowned sparrow, least Bell’s vireo, and yellow warbler. Additionally, the Project would remove habitat with the potential to support white-tailed kite and would reduce the suitable foraging and/or nesting habitat (e.g., chaparral, coastal sage scrub, oak woodland, and scrub oak chaparral). The rufous-crowned sparrow is not listed and is not a California Species of Concern, but does have a S3 State Ranking, and therefore is marginally considered to have special-status. However, based on the relatively low sensitivity ranking, broad distribution, and limited impact by the Project compared to the large range of species and the Project’s adjacency to MSHCP conservation areas to the south and to the west where proximate foraging habitat is available, impacts to the rufous-crowned sparrow would be less than significant.

Impacts to the least Bell’s vireo and yellow warbler that would occur upon development of the Commercial component would be potentially significant. However, as the MSHCP provides coverage for both species, the Project’s participation in the MSHCP through mandatory MSHCP fee payments and compliance with the biological requirements of the MSHCP ensures that any impacts to covered special status plants would be less than significant. In addition, the loss of habitat for the least Bell’s vireo would require mitigation and the impacts would require the approval of a DBESP by the Wildlife Agencies.

Construction of the BPI Industrial Development would potentially impact least Bell’s vireo, and as part of the JPR process for the development project RCA is requiring construction

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-33
mitigation for such indirect impacts. This is considered to be a significant impact requiring mitigation. MM 4.7.3.A and MM 4.7.3.B (alternative) remain applicable to the Modified Project to reduce impacts to Migratory Birds to a less than significant level. With the inclusion of additional construction mitigation contained in MM BIO-1 for indirect impacts to the least Bell’s vireo, impacts would be mitigated to less than significant.

Mitigation Measure MM BIO-1: If construction will occur within 300 feet of potential vireo habitat between March 15 and September 30, a biologist shall determine whether vireo individuals are present within the adjacent habitat. If work will start prior to March 15 and continue into the vireo season, or will start between March 15 and April 30, the biologist shall survey the adjacent habitat weekly for eight weeks[1] starting on or around March 15 until vireo are detected, or until eight visits are completed and the vireo is confirmed absent. If construction work will start after April 30, then surveys will start on or around April 10 (the formal start of the vireo survey period), and surveys will follow the survey intervals as stated above.

If vireo individuals are detected, the biologist will determine necessity and applicability of measures to address edge effects for construction activities occurring within 300 feet of occupied vireo habitat to protect the vireo. At minimum the following are recommended.
1) Noise: Given the proximity of the vireo habitat to the existing Green River Road and the adjacent SR-91, there is already an existing noise baseline from heavy traffic use, and it is possible that construction noise would not exceed that baseline. The Project proponent will retain a qualified biologist to perform noise monitoring to determine the ambient noise level at the habitat edge without construction activities occurring within 300 feet of the habitat edge, and then determine noise levels while construction activities are occurring. If it is determined that with construction, the noise levels exceed the ambient levels, then noise attenuation measures may be implemented, including the construction of a temporary noise attenuation barrier (sound wall) along the disturbance limits north of Green River Road. If it is determined that noise levels cannot be attenuated, then the specific construction activities resulting in the noise will need to be temporarily ceased until August 31, or prior if it is determined through surveys that the vireo are no longer present.
2) Lighting: Any night lighting needed during construction within 300 feet of occupied vireo habitat will be down shielded or directed away from the vireo habitat to prevent the illumination of the adjacent habitat.
3) Dust Emissions: The Project, as a part of standard best management practices (BMPs) pursuant to South Coast Air Quality Management District Rule 403, will introduce dust control measures for the duration of construction activities to minimize any dust-related effect on adjacent vireos.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-34
4) Trespassing: Prior to the start of construction activities along the northern side of Green River Road, the edge of the disturbance limits adjacent to the vireo habitat will be demarcated with orange construction fencing to prevent trespassing into the adjacent habitat. In addition, the Project proponent will implement an Environmental Awareness Training program prior to the start of construction to advise workers of sensitive biological areas adjacent to the development footprint, including the habitat areas north of Green River Ranch Road.

In 2019 the Crotch Bumble Bee was listed as a State Candidate Endangered (SCE) Species.

Crotch bumble bee was observed onsite during focused surveys for this species. The overall Study Area supports potentially suitable habitat for the Crotch bumble bee primarily within the non-native grasslands and within the scrub; however, this species is a habitat generalist as it will occur in a variety of plant communities throughout its range. Individuals were detected on the lower slopes in the southern portion of the Project’s impact footprint where the grassland areas are less disturbed and native scrub vegetation is present. Furthermore, if Crotch bumble bee remains as a SCE or has otherwise been confirmed as a State Endangered species at the time of Project site disturbance, then an Incidental Take Permit (ITP) may be required prior to the disturbance of the occupied habitat. Impact would be considered potentially significant.

The following mitigation measure which includes the conservation of 50.96 acres of scrub habitat and 26 acres of non-native grasslands and conservation of open space will offset impacts to the Crotch Bumble Bee and bring impacts to a less than significant level.

Mitigation Measure MM BIO-2: If the bumble bee is still a Candidate species or has been confirmed as a State listed species at the time of Project site disturbance, then prior to the issuance of a grading permit that would remove Crotch bumble bee habitat:
1) The Project proponent shall have conveyed or have an agreement to convey approximately 50.96 acres of various scrub habitats and 26 acres of non-native grassland in the southern portion of the Project site to the RCA, which constitutes avoidance of suitable habitat.
2) If the land to be conserved in the southern portion of the Project site has not been conveyed to the RCA and no agreement is yet in place to convey the property, the Project proponent shall coordinate with CDFW to address the extent of impacts and determine whether an ITP for Crotch bumble bee would be required. If an ITP were required, then mitigation may be required by CDFW as part of the ITP process, and the conservation of the comparable open space habitat would be presented to support the ITP.

This impact is new information or more severe impact as a result of the Modified Project, however, with the addition of Mitigation Measure MM BIO-2 impacts would be reduced to a less than significant level.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-35
As identified in the 2001 EIR for the Approved Project, suitable habitat occurs onsite for Plummer’s mariposa lily and intermediate mariposa lily and they have a moderate potential to occur onsite. These species were not observed during the updated surveys for the Modified Project. Many-stemmed dudleya and Brauton’s milk-vetch have a low likelihood of occurring onsite. These species were not observed during the updated surveys for the Modified Project, therefore impacts remain similar to those identified in the 2001 EIR for the Approved Project, which is less than significant.

Several sensitive wildlife species were observed on site during the updated surveys for the Modified Project. Several other sensitive wildlife species have at least a moderate potential to occur on site, identified within Appendix A and Append B of the Biological Technical Report.

As identified within the 2001 EIR for the Approved Project, short-term impacts may occur to the species as a result of construction activities. These species are not protected by federal or state listings as threatened or endangered and any loss of individuals would not threaten their regional populations. Removal of their habitat represents a less than significant impact to regional populations of these species.

As identified within the 2001 EIR, implementation of the Approved Project would result in a direct loss of at least one California gnatcatcher and occupied live-in habitat for the species.

While the loss of habitat for the species is now covered by the MSHCP, the Modified Project prohibits clearing occupied habitat during breeding season (March 1 through August 31).

These impacts remain potentially significant for the Modified Project. Mitigation Measure

4.7.1.A remain applicable to the Modified Project to reduce impacts to California gnatcatcher to a less than significant level.

The 2001 EIR concluded implementation of the Modified Project would result in potential impacts to migratory birds and the nests. Mitigation Measure 4.7.3.A and Mitigation Measure 4.7.3.B (alternative) remain applicable to the Modified Project to reduce impacts to Migratory Birds to a less than significant level.

With the inclusion of the additional Mitigation Measure for the Crotch Bumble Bee, Impacts would be more severe impacts from the Modified Project requiring revisions to the Prior EIR. With the include of the additional Mitigation Measure MM BIO-1 for the Crotch Bumble Bee, impacts are reduced to a less than significant level.

Impact BIO-2: Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, regulations or by the California Department of Fish and Game or U.S. Fish and Wildlife Service?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-36
Under the Modified Project, a total of 2.10 acres of Regional Board jurisdiction would be permanently impacted (all non-wetland waters), including 2.07 acres onsite and 0.03 acre offsite.

A total of 3.66 acres of CDFW Jurisdiction would be permanently impacted as part of the BIP Development. This includes 2.51 acres of non-riparian streambed and 1.15 acres of riparian streambed.

As identified in the 2001 EIR of the Approved Project, a total of 1.76 acres of Corps/RWQCB jurisdiction and 9.81 acres of CDFW jurisdiction would be impacted as a result of the Approved Project implementation. Per the 2001 EIR Mitigation Measure 4.7.2.A, impacts to riparian habitat would be replaced through creation of new riparian habitat at a minimum of

1.5:1 onsite or alternatively, or in combination with onsite crease, riparian or wetlands mitigation credits shall be acquired in an offsite mitigation bank at a replacement ratio of 2:1.

While RWQCB impacts have slightly increase for the Modified Project, these impacts are minor. Furthermore, impacts to CDFW jurisdiction as a result of the Modified Project has decreased significantly. Mitigation Measure 4.7.2.A remains applicable for the Modified Project with the clarification that impacts to the 3.66 acres of CDFW jurisdiction shall be mitigated at a greater than 3:1 ratio (11.14 acres). The Mitigation would be a combination of onsite restoration and preservation, and purchase of offsite mitigation bank (Riverpark Mitigation Bank). The onsite mitigation would consist of restoration of 2.57 acres of riparian oak woodland and preservation of 3.80 acres of oak woodlands and streams. The remaining balance of 4.68 acres would be purchased at a Mitigation bank. As such, Mitigation Measure

4.7.2.A would be clarified to include the following language.

Mitigation Measure 4.7.2A All riparian habitat impacted (i.e., removed) by the proposed project shall be replaced through creation of new riparian habitat of equal or greater quality. Permanent impacts to 3.47 acres of CDFW jurisdiction (including 1.96 acres of potential Corps/RWQCB jurisdiction) shall be mitigated through the combination of onsite restoration and preservation, and offsite mitigation (Riverpark Mitigation Bank: Should Riverpark Mitigation Bank become unavailable in the future, an alternative mitigation strategy through another mitigation bank within the MSHCP Plan Boundary shall be reviewed and approved by the RCA and Wildlife Agencies (CDFW and USFWS) prior to issuance of a grading permit). The onsite mitigation will consist of the restoration of 2.57 acres of riparian oak woodland and the preservation of 6.36 acres of oak woodlands and streams. The balance of mitigation would consist of 4.62 acres would be purchased at a Mitigation bank.

It is anticipated that project construction will require permits or approvals from the CDFW (per Section 1601/1603 of the Fish and Game Code), and RWQCB (per Section 401 of the federal Clean Water Act).

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-37
If habitat creation is conducted on site, the replacement ratio shall be a minimum of

1.5:1(create 1.5 acres of habitat for each 1 acre impacted). Suitable locations for onsite creation of habitat include proposed debris basins and drainage corridors that may be retained or established in the proposed estate residential area. Any portions of the basins that are used for habitat creation will be excluded from any debris removal, sediment removal, or other maintenance operations. The created habitat shall be retained in a natural condition in perpetuity. Since the existing coast live oak woodland is primarily associated with drainage courses, oak woodlands established as mitigation for measures 4.7.4A will also qualify as created riparian habitat if established in riparian settings including in or adjacent to the proposed debris basins.

With the clarification language for the Modified Project, impacts would be less than significant within mitigation, as previously identified in the 2001 EIR for the Approved Project.

Impact BIO-3: Have a substantial adverse effect on state or federally protected wetlands (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other means?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The biological studies prepared for the Modified Project determined the site does not support any wetlands. Consequently, no impact to state or federally protected wetlands would occur and no mitigation is required.

Impact BIO-4: Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use of native wildlife nursery sites?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The Modified Project will impact the lower portions of north-south ridges and canyons that terminate at the flat portion of the property at Green River Road that support the local movement of wildlife.

As discussed above, the City is currently pursuing a Criteria Refinement through the RCA and Wildlife Agencies to formally relocated PCL-1 west to coincide with the B Canyon area.

Additional information and environmental analysis of the Alternative Alignment of PCL-1 can be found in Section 5.0. The processing of the Criteria Refinement coincides with the RCA’s

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-38
recent acquisition of approximately 740 acres of lands located south and west of the Project site that contain B Canyon. The RCA issued Criteria Refinement Review Findings (CR# 24- 01-10-01, dated February 20, 2024) in support of the Criteria Refinement stating approval of the realignment of PCL-1. The findings letter is included as Appendix D-4.

The formal relocation of PCL-1 removes the Modified Project site from the Linkage and thereby greatly reduces the relative importance of the Project site to facilitate wildlife movement and to connect Core A and Core B. In further support of the assembly of PCL-1, the Modified Project proponent is proposing to conserve 80.77 acres of land within the southern half of the site. The proposed conservation is contiguous with the lands recently acquired by the RCA for the MSHCP Reserve. The 80.77 acres of proposed conservation contains the structural topography and vegetative cover to facilitate regional wildlife movement. It aligns with the wildlife linkage/corridor conservation goals of the MSHCP.

The Modified Project includes the construction of a wildlife fence between the proposed MSHCP conservation areas and the of the Project. The fencing will be constructed along the western and southern edges of the Project site to direct wildlife to the west along the rerelocated PCL-1 Route in B Canyon. The fence will start at the eastern property boundary, extending west along the limits of the proposed MSHCP Conservation until the fence reaches the western boundary shared with the existing MSHCP Additional Reserve Lands. Then the fence will turn north along the property boundary to the terminus of Fresno Road, then northwest where the fence will terminate at the limits of Caltrans’ easement for SR-91. The fence is proposed to be chain link (at least 8 feet tall) and will include one-way swing gates to allow for wildlife escape access to the open space to the south and west.

Temporary disturbances to wildlife movement may occur during construction; however, these disturbances would primarily occur during day-time hours during construction activities and would not interfere significantly with wildlife movement on a landscape level. The Project’s consistency with the MSHCP and adherence to mandatory MSHCP requirements would reduce impacts to wildlife movement to a level of less than significant under CEQA.

Additionally, no native wildlife nursery sites were observed within the Project area and therefore, no impacts to wildlife nursery sites would occur.

The Project’s construction activities have the potential to impact active bird nests if vegetation is removed during the nesting season (February 1 to September 15). To avoid impacts to nesting birds, as identified within the 2001 EIR Mitigation Measure 4.7.3.A and Mitigation Measure 4.7.3.B (alternative) remain applicable to the Modified Project to reduce impacts to Migratory Birds to a less than significant level.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-39
Impact BIO-5: Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The 2001 EIR identified 3.90 acres of coast live oak that would be impacted as a result of the Approved Project. Mitigation Measures 4.7.4.A through 4.7.4.E was included to mitigate for the impacts associated with coast live oak woodlands to a less than significant level.

The Modified Project would also implement Mitigation Measures 4.7.4.A through 4.7.4.E to reduce impacts to coast live oak. However, the Modified Project would impact 1.13 acres of coast live oak woodland, which is significantly less impacts than the Approved Project.

Furthermore, the Modified Project would avoid and conserve 3.50 acres of coast live oak woodland. Therefore, the Modified Project reduces impacts to coast live oak woodland in comparison to the Approved Project.

While the City has no direct tree preservation ordinance, the City’s 2020–2040 General Plan includes several goals and policies relating to biological resources. The goals and policies of the General Plan are intended to support consistency with the MSHCP and to protect and preserve biological resources including plants and wildlife, vegetation communities, and wetlands and drainages.

The Project will not conflict with any local policies or ordinances protecting biological resources. The Project proponent is proposing permanent conservation of 80.77 acres of land within the southern half of the Study Area, and all development associated with the Modified Project will comply with the requirements of the MSHCP. The conservation of native land and compliance with the MSCHP in conjunction with avoidance, minimization, and mitigation will render the Project compliant with and not conflict with the biological resource policies of the City of Corona 2020–2040 General Plan. With implementation of Mitigation Measures

4.7.4.A through 4.7.4.E, impacts are considered less than significant.

Impact BIO-6: Conflict with the provisions of an adopted Habitat Conservation Plan, Natural Community Conservation Plan, or other approved local, regional, or state habitat conservation plan?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The Modified Project occurs within the MSHCP Temescal Area Plan, specifically in Subunit 1 (Santa Ana River to Santa Ana Mountains), Criteria Cells 1702, 1704, 1811, and 1812 [Exhibit 5A – MSHCP Overlay Map]. Lands described for conservation within these Criteria Cells are intended support the assembly of Proposed Constrained Linkage 1 (“PCL-1”) and

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-40
Proposed Constrained Linkage 2 (“PCL-2”) further to the east. The City is currently pursuing a Criteria Refinement through the RCA and Wildlife Agencies to formally relocate PCL-1 west to coincide with the B Canyon area. Additional information and environmental analysis of the Alternative Alignment of PCL-1 can be found in Section 5.0. The processing of the Criteria Refinement coincides with the RCA’s recent acquisition of approximately 740 acres of lands located south and west of the Specific Plan Project that contain B Canyon. The RCA issued Criteria Refinement Review Findings (CR# 24-01-10-01, dated February 20, 2024) in support of the Criteria Refinement stating approval of the realignment of PCL-1. The findings letter is included as Appendix D-4.

The formal relocation of PCL-1 removes the Modified Project site from the Linkage and thereby greatly reduces the relative importance of the Project site to facilitate wildlife movement and to connect Core A and Core B. Even with the approval of the Criteria Refinement, i.e., the relocation of PCL-1, the Modified Project is still subject to JPR for the RCA to determine the Project’s overall consistency with the MSHCP; however, the Modified Project would no longer be required to conserve lands in support of the original PCL-1 alignment. Regardless, the Modified Project would conserve approximately 80.77 acres of land within the southern half of the site to contribute to the MSHCP Reserve. The conserved lands would be dedicated to the RCA and managed and protected in perpetuity.

The Modified Project would impact approximately 3.66 acres of MSHCP riparian/riverine areas, including 1.15 acres of riparian vegetation and 2.51 acres of unvegetated riverine areas.

The functions of impacted MSHCP riparian areas must be replaced such that the resulting project is “biologically equivalent or superior” to the existing site conditions. A DBESP must be approved by the wildlife agencies (USFWS and CDFW) for the proposed Modified Project.

Per the submitted DBESP prepared by GLA on January 17, 2022 and revised August 29, 2024 included as Appendix E-2, the modified Project avoids a total of 80.77 acres in the southern portion of the site, and protect in perpetuity 6.36 acres which contain 2.57 acres of riparian/riverine areas and 3.80 acres of coast live oak woodland.

In comparison, of the 3.66 acres of impacts to riparian/riverine areas, more than half of the impacts (2.07 acres) include drainage features in the northern portion of the Project site that have been disturbed through past land uses, with 1.01 acres mapped as disturbed or developed;

0.96 acre as supporting vegetation associated with ruderal areas, including non-native grasses and forbs; and 0.10 acre in areas mapped as residential/urban/exotic. These drainage features do not contain habitats described for conservation, nor do they contain habitat that support Section 6.1.2 species. However, the Project will impact 1.59 acres of riverine areas supporting native vegetation communities, including 1.12 acres of coast like oak woodland, 0.03 acre of elderberry stands, and 0.44 acre of native upland scrub. The coast live oak woodland and elderberry stands are classified as riparian communities.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-41
With the implementation of Mitigation Measure 4.7.2.A, impacts would be less than significant. Furthermore, with the realignment and conservation of PCL-1, the Project would conserve 80.77 acres of lands, which increases habitat for sensitive and listed species. These lands would be protected in perpetuity via the MSHCP Reserve to support Covered Species.

Lastly, the Project will conserve and protect 2.57 acres of riparian/riverine areas, including

3.80 acres of coast live oak woodland and 0.64 acre of native upland scrub communities (chaparral and Riversidean sage scrub. The Project will conserve habitat functions at a 2.5:1 to nearly 3:1 ratio to the quantity impacted. In addition, the Project will further mitigate impacts to 3.66 acres of MSHCP riparian/riverine areas through the onsite restoration of 2.57 acres of oak woodland and the additional purchase of 4.62 acres of mitigation credits at the Riverpark Mitigation Bank.

4.4.8 CUMULATIVE IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Less than Significant Impact with Mitigation. Cumulative impacts are defined as the direct and indirect effects of a proposed project which, when considered alone, would not be deemed a substantial impact, but when considered in addition to the impacts of related projects in the area, would be considered potentially significant. “Related projects” refers to past, present, and reasonably foreseeable probable future projects, which would have similar impacts to the proposed Project.

Anticipated cumulative impacts are addressed by the MSHCP, which, as currently adopted, addresses 146 “Covered Species” that represent a broad range of habitats and geographical areas within western Riverside County, including threatened and endangered species and regionally- or locally-sensitive species that have specific habitat requirements and conservation and management needs. The MSHCP addresses biological impacts for take of Covered Species within the MSHCP area. Impacts to Covered Species and establishment and implementation of a regional conservation strategy and other measures included in the MSHCP are intended to address the federal, state, and local mitigation requirements for these species and their habitats.

Impacts to the special-status vegetation communities could be potentially cumulatively significant, prior to mitigation. These vegetation communities are Coast Live Oak Woodland, Coastal Sage Scrub, Elderberry Savannah, and Riparian/Riverine resources for the Modified Project. For those non-riparian/riverine vegetation communities, the MSHCP provides full mitigation for proposed impacts. For the proposed impacts to riparian/riverine resources, the MSHCP requires equivalent or superior preservation that is detailed in a DBESP. As presented above, the Modified Project would mitigate 3.04 acres of riparian/riverine resources (1.11 acres of riparian and 1.93 acres of unvegetated streambed). This would mitigate impacts to a level

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-42
of less than significant under CEQA and would be consistent with MSHCP requirements in that equivalent or superior preservation is provided.

The proposed BPI Project would remove several Coulter’s matilija poppy, a non-listed special status plant species that is covered and adequately conserved by the MSHCP. The removal of Coulter’s matilija poppy by the Modified Project would not pose a cumulatively considerable contribution to the regional decline of this species.

Impacts to the following animal species would be potentially cumulatively significant, prior to mitigation, as a result of the loss of potential habitat for these species: Crotch’s bumble bee, least Bell’s vireo, Cooper’s hawk, yellow warbler, southern California rufous-crowned sparrow, western mastiff bat, western yellow bat, coast horned lizard, coast patch-nosed snake, coastal whiptail, orange throat whiptail, red-diamond rattlesnake, and southern California legless lizard.

Some of these species are fully covered species under the MSHCP and as such any proposed impacts would be fully mitigated under the MSHCP. For others such as the bat species, impacts would be potentially cumulatively significant, however the Project is proposing permanent natural land conservation in the southern portion of the Project site. With implementation of Project mitigation in combination with the Project’s proposed design feature of open space conservation, the potential for the Project to make a cumulatively considerable contribution to the regional decline of any of these species would not occur.

With implementation of the Modified Project’s open space and in combination with Mitigation Measure 4.7.1.A for impacts to California gnatcatchers, Additional information and environmental analysis of the Alternative Alignment of PCL-1 can be found in Section

5.0. for Crotch bumble bee, Mitigation Measure 4.7.2.A for mitigation for impacts to jurisdictional features, Mitigation Measure 4.7.3.A for nesting birds, Mitigation Measure BIO-1 for least Bell’s vireo, Mitigation Measure BIO-2 for Crotch’s bumble bee, Mitigation Measure 4.7.4 through 4.7.4.E for oak woodlands mitigation, the Modified Project would have a less than significant with mitigation cumulative impact regarding biological resources.

4.4.9 MITIGATION MEASURES IDENTIFIED IN PRIOR EIR APPLICABLE TO

MODIFIED PROJECT
With minor modifications in some instances, all mitigation as identified within the 2001 EIR are applicable to the Modified Project as follows.

4.7.1A: Prior to issuance of grading permits for each increment of development, applicable pre-construction California gnatcatcher surveys shall be conducted and a survey report approved by the City. The report shall identify mitigation for impacts to the California gnatcatcher consisting of acquiring and preserving California gnatcatcher habitat of equal or greater quality at a minimum

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-43
replacement ratio of 1:1 (acquire at least 1 acre for each acre impacted). The Modified Project would impact 8 acres of habitat used by the California gnatcatcher; therefore, mitigation shall consist of the acquisition and preservation of at least 8 acres of occupied habitat. The acquired habitat shall be in a location that facilitates management for the species (i.e., currently supports the species and is contiguous with a larger area that will be managed for conservation of the species). Potential suitable locations include areas adjacent to existing reserves (such as Stephens’ kangaroo rat reserves) or within established mitigation banks for the California gnatcatcher.

Project impacts to the California gnatcatcher and its designated critical habitat may require consultation or other permitting for compliance with the federal ESA that may result in requirements for additional mitigation measures beyond those described above.

4.7.2A: Prior to issuance of grading permits for each increment of development, applicable pre-construction riparian area surveys shall be conducted and a survey report approved by the City. The report shall identify all riparian habitat impacted (i.e., removed) by the proposed project and such impacted areas shall be replaced through creation of new riparian habitat of equal or greater quality.

Impacts to 3.66 acres of CDFW jurisdiction (including 2.10 acres of potential RWQCB jurisdiction) shall be mitigated at a 3:1 ratio (10.98 acres) through the combination of onsite restoration and preservation, and offsite mitigation (Riverpark Mitigation Bank). The onsite mitigation will consist of the restoration of 2.57 acres of riparian oak woodland and the preservation of 6.36 acres of oak woodlands and streams. The balance of mitigation would consist of 4.62 acres would be purchased at a Mitigation bank.

It is anticipated that project construction may require permits or approvals from the CDFW (per Section 1601/1603 of the Fish and Game Code) and RWQCB (per Section 401 of the federal Clean Water Act),.

4.7.3A: Prior to the commencement of tree removal or grading on the proposed project site during the nesting season (March-July), all suitable habitat shall be thoroughly surveyed for the presence of nesting birds by a qualified biologist.

If any active nests are detected, the area shall be flagged and avoided until the nesting cycle is complete. In addition, a biologist shall be present on site to monitor the tree removal and grading to ensure that any nests detected during the initial survey are not disturbed.

4.7.3B: (Alternative) Tree removal and grading shall be delayed until after the nesting season (March-July).

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-44

4.7.4A: Prior to issuance of grading permits for PA 1, 2, 3, and 5, the project shall comply with the City’s Hillside Development Overlay Ordinance. This mitigation was previously introduced as mitigation measure 4.6-1. This Ordinance promotes the use of residential clustering techniques and their measures to minimize impacts on hillside sites, typically areas containing oak trees. Home sites shall be clustered into the fewest number of acres possible to minimize the spread of impacts over a large portion of the property to reduce fragmentation of the remaining natural areas.

4.7.4B: Prior to issuance of grading permits for PAs 1, 2, 3, and 5, the applicant shall design an oak woodland management plan which includes the following:
• Provisions for ongoing maintenance, management, and construction impact practices for all oaks on site.
• Provisions for enhancing oak woodlands not within the development zone. • Provisions for limiting human and vehicular access to existing oak woodland areas in order to preserve habitat quality.
• Limitations on the use of herbicides or pesticides within the oak woodland areas.

4.7.4C: Prior to grading within PAs 1, 2, 3, and 5, the applicant shall conduct a revised Tree Survey, based on the staking of the specific limits of grading, to assess opportunities for transplanting the oak trees.

4.7.4D: Prior to issuance of building permits within PAs 1, 2, 3, and 5 a qualified native plant horticulturist shall determine the sensibility and likelihood of survival of transplanting 10 percent of the oak trees.

4.7.4E: Prior to certification of occupancy, the applicant shall replant 15-gallon size oaks at a ratio of 10 to 1 for all oaks lost but not transplanted. The location and methods for these plantings would be specified by a qualified native plant biologist/horticulturist.

4.4.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT MM BIO-1: If construction will occur within 300 feet of potential vireo habitat between March 15 and September 30, a biologist shall determine whether vireo individuals are present within the adjacent habitat. If work will start prior to March 15 and continue into the vireo season, or will start between March 15 and April 30, the biologist shall survey the adjacent habitat weekly for eight weeks[1] starting on or around March 15 until vireo are detected, or until eight visits are completed and the vireo is confirmed absent. If construction work

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-45
will start after April 30, then surveys will start on or around April 10 (the formal start of the vireo survey period), and surveys will follow the survey intervals as stated above.

If vireo individuals are detected, the biologist will determine necessity and applicability of measures to address edge effects for construction activities occurring within 300 feet of occupied vireo habitat to protect the vireo. At minimum the following are recommended.
1) Noise: Given the proximity of the vireo habitat to the existing Green River Road and the adjacent SR-91, there is already an existing noise baseline from heavy traffic use, and it is possible that construction noise would not exceed that baseline. The Project proponent will retain a qualified biologist to perform noise monitoring to determine the ambient noise level at the habitat edge without construction activities occurring within 300 feet of the habitat edge, and then determine noise levels while construction activities are occurring. If it is determined that with construction, the noise levels exceed the ambient levels, then noise attenuation measures may be implemented, including the construction of a temporary noise attenuation barrier (sound wall) along the disturbance limits north of Green River Road.

If it is determined that noise levels cannot be attenuated, then the specific construction activities resulting in the noise will need to be temporarily ceased until August 31, or prior if it is determined through surveys that the vireo are no longer present.
2) Lighting: Any night lighting needed during construction within 300 feet of occupied vireo habitat will be down shielded or directed away from the vireo habitat to prevent the illumination of the adjacent habitat. 3) Dust Emissions: The Project, as a part of standard best management practices (BMPs) pursuant to South Coast Air Quality Management District Rule 403, will introduce dust control measures for the duration of construction activities to minimize any dust-related effect on adjacent vireos.
4) Trespassing: Prior to the start of construction activities along the northern side of Green River Road, the edge of the disturbance limits adjacent to the vireo habitat will be demarcated with orange construction fencing to prevent trespassing into the adjacent habitat. In addition, the Project proponent will implement an Environmental Awareness Training program prior to the start of construction to advise workers of sensitive biological areas adjacent to

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

BIOLOGICAL RESOURCES

ENPLANNERS

4.4-46
the development footprint, including the habitat areas north of Green River Ranch Road.

MM BIO-2: If the Crotch bumble bee is still a Candidate species or has been confirmed as a State listed species at the time of Modified Project site disturbance, then prior to the issuance of a grading permit that would remove Crotch bumble bee habitat the following measures shall be implemented:
• The Project proponent shall have conveyed or have an agreement to convey approximately 50.96 acres of various scrub habitats and 26 acres of nonnative grassland in the southern portion of the Project site to the RCA, which constitutes avoidance of suitable habitat.
• If the land to be conserved in the southern portion of the Project site has not been conveyed to the RCA and no agreement is yet in place to convey the property, the Project proponent shall coordinate with CDFW to address the extent of impacts and determine whether an Incidental Take Permit (ITP) for Crotch bumble bee would be required. If an ITP were required, then mitigation may be required by CDFW as part of the ITP process, and the conservation of the comparable open space habitat would be presented to support the ITP.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

CULTURAL RESOURCES

ENPLANNERS

4.5-1

4.5 CULTURAL RESOURCES

4.5.1 INTRODUCTION
This section provides a summary of applicable impacts and mitigation measures from the 2001 EIR, an overview of existing cultural resources within the GRRSP Planning Area and surrounding region, a summary of applicable regulations, and analyses of potential changes in impacts to cultural resources from implementation of the Modified Project in comparison to the Approved Project. No NOP comment letters, or Scoping Meeting comments were received pertaining to this topic.

This section of the Draft SEIR is based on the Phase I Cultural Resources Assessment for the Green River Ranch III Project (CRA), prepared by Brian F. Smith Associates, Inc. (BFSA), dated August 7, 2020, revised January 10, 2024 (Appendix F).

4.5.2 SUMMARY OF IMPACTS AND MITIGATION MEASURES FROM THE 2001 EIR
The Approved Project impact analysis related to cultural resources as presented in the 2001 EIR as well as any mitigation measures identified to reduce significant impacts are summarized as follows:
b) Archeological resources?
c) Historical site or building?
d) Ethnic cultural values?
As stated in the 2001 EIR, the GRRSP area contained two manufactured homes, facilities for a horse boarding operation, and a church operating out of an old restaurant building. In addition, a 1939 concrete culvert at the extreme north end of the Project area was evaluated for consideration as a historic resource, but was not considered a historic resource and not eligible for inclusion in the National Register. The remainder of the Project area was undeveloped and no other potential historic structures existed on site. As a result, the 2001 EIR determined no impact would result.
e) Restriction of sacred uses?
Although the GRRSP area included a church on site, the 2001 EIR determined there were no known unique ethnic or cultural values associated with the site. In addition, there were no known religious or sacred uses on site which would be affected by the Approved development, and no significant impact on religious/sacred uses attributable to the Approved Project would be expected.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CULTURAL RESOURCES

ENPLANNERS

4.5-2
Cumulative Impacts
The 2001 EIR determined there were no significant prehistoric or historic archeological resources located within the GRRSP Planning Area. As a result, the 2001 EIR determined, there was no cumulative impact anticipated by the implementation of Approved Project.

4.5.3 ENVIRONMENTAL SETTING
The GRRSP Planning Area is located in the northwestern portion of the Santa Ana Mountains at the eastern entrance to the Santa Ana Canyon. Topographically, the surrounding area of the GRRSP site slopes down north and west towards Wardlow Wash and the Santa Ana River, and slopes down to the north from the Santa Ana Mountain hillside to Green River Ranch Road.

The northern portion of the GRRSP Planning Area consists of gently sloping to almost flat terrain. However, the southern portion of the Planning Area is comprised of the steep slopes of the Santa Ana Mountains which are separated by seasonal drainages extending from higher elevations north through the property into the Santa Ana River and the Wardlow Wash.

Topographic elevation for the GRRSP Planning Area include ranges from approximately 515 to 1,800 feet above mean sea level (AMSL).

The Santa Ana Mountains are composed of Pleistocene nonmarine, Oligocene nonmarine, Upper Cretaceous, and Paleocene marine and include two faults, the Chino and the WhittierElsinore fault. The alluvial and aeolian deposition and faults combined with erosion processes are responsible for the modern appearance of the region.

Records Search
As stated in the CRA, A request was submitted to the Eastern Information Center (EIC) for a records search; however, due to the current pandemic (2020 COVID-19 outbreak), results of the archaeological records search have yet to be obtained. However, in support of the 2001 EIR, the entire property was surveyed in 1999 by LSA Associates, Inc., including four previous times (Kirkish and McCoy 1972; Leonard 1975; Lipp 1977; Tedlock 1977). None of these studies identified any cultural resources on the property. Although, a historic concrete culvert stamped “1939” was identified in the northern portion of the development, LSA evaluated the culvert as not eligible for the California Register of Historical Resources (CRHR) (LSA 2000).

A Sacred Lands File (SLF) search was also requested from the Native American Heritage Commission (NAHC). The NAHC SLF search did not indicate the presence of any sacred sites or locations of religious or ceremonial importance within the search radius.

Field Survey
BFSA conducted the survey of the GRRSP Planning Area on July 10, 2020 by Senior Field Archaeologist Clarence Hoff with assistance from field archaeologists James Shrieve. The archaeological survey of the Planning. Area was a reconnaissance consisting of a series of parallel survey transects spaced at approximately 10-meter intervals, except where the steep

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

CULTURAL RESOURCES

ENPLANNERS

4.5-3
slopes and dense vegetation prohibited systematic transects. The appropriate primary records form is included in the technical study contained in Appendix E.

4.5.4 PROJECT DESIGN FEATURES (PDF)
No Project Design Features are proposed for the Modified Project.

4.5.5 EXISITNG REGULATIONS, PLANS, PROGRAMS, AND POLICIES

FEDERAL REGULATIONS
National Historic Preservation Act (NHPA)
The NHPA of 1966 established a federal program to identify and protect historic places. It created the National Register of Historic Places, an inventory of districts, sites, buildings, structures, and objects deemed significant for their history, architecture, archaeology, engineering, or culture. The NHPA also requires federal agencies to consider the potential effects of their undertakings on historic properties. This process, outlined in Section 106 of the NHPA, ensures that consulting parties are identified, the significance of historic properties is assessed, and adverse effects are avoided, minimized, or mitigated.

STATE REGULATIONS
California Public Resources Code Section 5097.5
Public Resources Code section 5097.5 provides for the protection of cultural and paleontological resources and prohibits the removal, destruction, injury, or defacement of archaeological and paleontological features on any lands under the jurisdiction of State or local authorities.

California Register of Historical Resources Section 5020 State law also protects cultural resources by requiring evaluations of the significance of prehistoric and historic resources in CEQA documents. A cultural resource is an important historical resource if it meets any of the criteria found in Section 15064.5(a) of the State CEQA Guidelines. These criteria are nearly identical to those of the National Register.

The State Historic Preservation Officer (SHPO) maintains the California Register. Properties listed, or formally designated eligible for listing, on the National Register are nominated to the California Register and then selected to be listed on the California Register, as are the State Landmarks and Points of Interest.

California Penal Code Section 622.5
California Penal Code section 622.5 provides misdemeanor penalties for injuring or destroying objects of historic or archaeological interest located on public or private lands, but specifically excludes the landowner.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CULTURAL RESOURCES

ENPLANNERS

4.5-4
California Health and Safety Code Sections 7050.5 and 7052 California Health and Safety Code section 7050.5 declares that in the event of the discovery of human remains outside a dedicated cemetery, all ground disturbance must cease and the county coroner must be notified. California Health and Safety Code section 7052 establishes a felony penalty for mutilating, disinterring, or otherwise disturbing human remains, except by relatives.

REGIONAL REGULATIONS
There are no regional regulations that apply to the Modified Project.

LOCAL REGULATIONS
City of Corona 2020-2040 General Plan
Historic Resources Element
Goal HR-3 Recognize the importance of archeological and paleontological resources and ensure the identification and protection of those resources within the City of Corona.

Policy HR-3.1 Require appropriate treatment/preservation of archaeological collections in a culturally appropriate manner, in accordance with state and federal standards, and in consultation with interested Native American tribes that have traditional cultural affiliation with the project area and/or the resources affected by the project.

Policy HR-3.2 Require that development proposals incorporate specific measures to identify, protect, and preserve cultural resources in the planning, environmental review, and development process.

Policy HR-3.3 Archaeological resources found prior to or during construction shall be evaluated by a qualified archaeologist and appropriate mitigation measures applied, pursuant to § 21083.2 of CEQA, before the resumption of development activities. Any measures applied shall include the preparation of a report meeting professional standards, which shall be submitted to the appropriate CHRIS information center.

Policy HR-3.4 Any project that involves earth-disturbing activities in an area determined to be archaeologically or culturally sensitive shall require evaluation of the site by a qualified archaeologist. The applicant shall implement the recommendations of the archaeologist, subject to the approval of the City. Planning Department.

Policy HR-3.5 Any project that involves earth-disturbing activities in an area determined to be archaeologically or culturally sensitive shall require consultation by the applicant with interested federally recognized American Indian Tribe(s) that have a traditional cultural affiliation with the project area and/or the resources affected by the project, for the purposes of determining resources impacts and appropriate mitigation to address such impacts.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

CULTURAL RESOURCES

ENPLANNERS

4.5-5
Applicant shall also arrange for monitoring of earth-disturbing activities by interested federally recognized American Indian Tribe(s) that have a traditional cultural affiliation with the project area and/or the resources affected by the project, if requested.

Policy HR-3.8 In the event of the discovery of a burial, human bone, or suspected human bone, all excavation or grading in the vicinity of the find shall halt immediately and the area shall be protected and the project applicant immediately shall notify the Riverside County Coroner and comply with provisions of the Health and Safety Code § 7050.5, including PRC § 5097.98, if applicable. If the find is determined to be Native American human remains, the applicant shall consult with the Most Likely Descendent to determine appropriate treatment for such remains.

4.5.6 THRESHOLDS OF SIGNIFICANCE
Based on the relevant CEQA Guidelines as currently implemented by the City of Corona, significant cultural resources impacts would occur if the proposed Project or any Projectrelated component would:

Threshold CUL-1 Cause a substantial adverse change in the significance of a historical resource pursuant to § 15064.5?
Threshold CUL-2 Cause a substantial adverse change in the significance of an archaeological resource pursuant to § 15064.5?
Threshold CUL-3 Disturb any human remains, including those interred outside of dedicated cemeteries?

METHODOLOGY
Cultural resource impacts are assessed based on the potential for the Modified Project to significantly affect existing known and unknown historic and archaeological resources. The methodology entails identifying significant cultural resources and whether the Modified Project would cause a substantial adverse change in the significance of the resource. Examples of substantial adverse changes include physical demolition, destruction, relocation, or alteration of the resource or its immediate surroundings such that the significance of an historical resource would be materially impaired.

A review of the CRA comprised of an archaeological survey consisting of an institutional records search, a sacred lands file (SLF) search, and a pedestrian survey within the prior 164- acre Project Boundary (now 160 acres).

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CULTURAL RESOURCES

ENPLANNERS

4.5-6

4.5.7 ENVIRONMENTAL IMPACTS
Impacts
Would the
Modified
Project result
in new or
more severe
impacts
requiring
revisions to
the Prior EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions to
the Prior EIR?
Is there new
information that
would result in
new or more severe
impacts from the
Modified Project
requiring revisions
to the Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

CUL-1 Cause a substantial
adverse change in
the significance of a
historical resource
pursuant to §
15064.5?
CUL-2 Cause a substantial
adverse change in
the significance of
an archaeological
resource pursuant to
§ 15064.5?
CUL-3 Disturb any human
remains, including
those interred
outside of dedicated
cemeteries?

IMPACTS ASSOCIATED WITH THE MODIFIED PROJECT
Impact CUL-1: Cause a substantial adverse change in the significance of a historical resource pursuant to § 15064.5?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

An adverse effect is found when a project may alter, directly or indirectly, any of the characteristics of a historic resource that would diminish the integrity of the property’s location, design, setting, materials, workmanship, feeling, or association. Substantial adverse change in the significance of an historical resource means physical demolition, destruction, relocation, or alteration of the resource or its immediate surroundings such that the significance of an historical resource would be materially impaired (CEQA, Title 14, Chapter 3, p78; Federal Register, 36 CFR Part 800).

As discussed in the Project Description, no changes in the location, size, or boundaries of the GRRSP Planning Area boundary have occurred since adoption of the GRRSP in 2001. In

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

CULTURAL RESOURCES

ENPLANNERS

4.5-7
addition, the Modified Project would modify the size and boundaries of the GRRSP, however minimally in the northern portion of the Project site. In addition, the eastern portion of the Project site has been slightly expanded to incorporate appropriate grading limits within the hilly terrain. As such, BFSA conducted this updated assessment to locate and record any cultural resources identified within the Modified Project boundary in compliance with the California Environmental Quality Act (CEQA) and following City of Corona Environmental Guidelines.

As stated in the CRA prepared for the Modified Project, the previously discussed 1939 culvert recorded by LSA has been completely replaced when the City of Corona conducted improvements to Green River Road between 2015 and 2016. Although the 1939 culvert has been replaced, additional historic features were identified in the Modified Project’s CRA within the GRRSP Planning Area. Within the CRA, BFSA identified these features as Site Temp-1 of which consist of a board-formed concrete water tank, a concrete-lined reservoir, and a front-gabled cinderblock garage. Based upon aerial photographs and property research, Site Temp-1 appears to be associated with the ranching operations first visible on aerial photographs from 1946. However, Site Temp-1 is not eligible for listing on the CRHR and do not qualify as significant resources under CEQA. As determined in the CRA prepared for the Modified Project, there are no significant resources identified within the GRRSP Planning Area. Therefore, no new or substantially greater impacts related to historical resources would occur with implementation of the proposed Modified Project when compared to those identified in the 2001 EIR.

Mitigation Measure
No mitigation measures are required.

Impact CUL-2: Cause a substantial adverse change in the significance of an archaeological resource pursuant to § 15064.5?
Change in Circumstance or New Information Requiring Major or Minor EIR Revisions.

The archaeological surveys conducted within the GRRSP Planning Area for the 2001 EIR revealed no archaeological or cultural resources. Similarly, the CRA prepared for the Modified Project (Appendix E) determined that no significant resources were identified within the GRRSP Planning Area boundary. However, the CRA states that given the prior disturbance and historic use of the Project site, and the proximity to multiple natural sources of water, unknown buried archaeological deposits may be encountered within the Planning Area during grading operations. Due to current best practices and the City’s General Plan, it is understood that unknown resources may be encounter during development of the Modified Project may occur resulting in a significant impact.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CULTURAL RESOURCES

ENPLANNERS

4.5-8
As stated below in Mitigation Measure, MM CUL-1, all earthwork for development of the Modified Project would be required to be monitored by a qualified archaeologist and protocols within the Mitigation Monitoring Reporting Program (MMRP) are to be followed. As a result, with implementation of MM CUL-1 impacts to unknown archaeological resources would be reduced to less than significant. However, no substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR.

Mitigation Measure
The Modified Project introduces the following Mitigation Measures and are further described in detail Section 4.5.10.
• MM CUL-1 Mitigation Monitoring and Reporting Program (MMRP) Impact CUL-3: Disturb any human remains, including those interred outside of dedicated cemeteries?
Change in Circumstance or New Information Requiring Major or Minor EIR Revisions.

As previously stated, no changes in the location, size, or boundaries of the Specific Plan area have occurred since the 2001 EIR. In addition, the Modified Project would modify the size and boundaries of the GRRSP, however minimally. No evidence suggesting the area has been utilized in the past for human burials has been identified in the approved GRRSP Planning Area. Nevertheless, the remote potential exists that human remains may be unearthed during grading and excavation activities associated with Modified Project construction should Project-related construction activities extend into previously undisturbed soils.

As stated in Mitigation Measure, MM CUL-2, in the unlikely event human remains are discovered during grading or construction activities within the area, compliance with State law (Health and Safety Code § 7050.5) (HSC § 7050.5) would be required. As stated in the City’s General Plan, these requirements have been imposed on any construction activity in which human remains are detected after certification of the 2001 EIR. Therefore, the potential to encounter human remains would occur as a result of the Modified Project and implementation of MM CUL-2 would be required per State Law and render potential impacts to less than significant. However, no substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR.

Mitigation Measure
The Modified Project introduces the following Mitigation Measures and are further described in detail Section 4.5.10.
• MM CUL-2 Human Remains

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

CULTURAL RESOURCES

ENPLANNERS

4.5-9

4.5.8 CUMULATIVE IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
As stated in the 2001 EIR, the cumulative impact area for cultural resources is the City of Corona. Similar to the Modified Project, the 2001 EIR determined no significant prehistoric or historic archeological resources were located within the Project area. Moreover, the previously identified concrete culvert located at the north end of the Project area was evaluated for consideration as a historic resource is not considered a historic resource and is not eligible for inclusion in the National Register. Therefore, as determined in the 2001 EIR, there are no cumulative impact anticipated by the implementation of the Modified Project.

4.5.9 MITIGATION MEASURES IDENTIFIED IN PRIOR EIR APPLICABLE TO

MODIFIED PROJECT
No mitigation measures were included in the 2001 EIR.

4.5.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT The Modified Project introduces the following Mitigation Measures and are further described in detail below. In some instances, the new measures to be implemented reflect current regulations and/or best practices, but the measures substantively accomplish the same level of significance as the 2001 EIR.

MM CUL-1: Mitigation Monitoring and Reporting Program (MMRP) - As a condition of project approval, a MMRP is recommended to identify any cultural resources that may be uncovered during grading, and subsequently, to mitigate potential impacts to any discovered archaeological resources evaluated as significant.

This program shall include, but not be limited to, the following actions:
1) Prior to issuance of a grading permit, the applicant shall provide written verification in the form of a letter from the project archaeologist to the lead agency stating that a certified archaeologist has been retained to implement the monitoring program.
2) The project applicant shall provide Native American monitoring during grading when the archaeological monitor identifies undisturbed soil or Native American artifacts. The Native American monitor shall work in concert with the archaeological monitor to observe ground disturbances and search for cultural materials when the potential exists to encounter prehistoric artifacts.
3) The certified archaeologist shall attend the pre-grading meeting with the contractors to explain and coordinate the requirements of the monitoring program.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CULTURAL RESOURCES

ENPLANNERS

4.5-10
4) During the cutting of previously undisturbed deposits, the archaeological monitor(s) shall be on-site, as determined by the consulting archaeologist, to perform periodic inspections of the excavations. The frequency of inspections will depend upon the rate of excavation, the materials excavated, and the presence and abundance of artifacts and features. The consulting archaeologist shall have the authority to modify the monitoring program if the potential for cultural resources appears to be less than anticipated.
5) Isolates and clearly non-significant deposits will be minimally documented in the field so the monitored grading can proceed. 6) In the event that previously unidentified cultural resources are discovered, the archaeologist shall have the authority to divert or temporarily halt ground disturbance operation in the area of discovery to allow for the evaluation of potentially significant cultural resources.

The archaeologist shall contact the lead agency at the time of discovery.

The archaeologist, in consultation with the lead agency, shall determine the significance of the discovered resources. The lead agency must concur with the evaluation before construction activities will be allowed to resume in the affected area. For significant cultural resources, a Research Design and Data Recovery Program to mitigate impacts shall be prepared by the consulting archaeologist and approved by the lead agency before being carried out using professional archaeological methods. If any human bones are discovered, the county coroner and lead agency shall be contacted. In the event that the remains are determined to be of Native American origin, the Most Likely Descendant (MLD), as identified by the NAHC, shall be contacted in order to determine proper treatment and disposition of the remains. 7) Before construction activities are allowed to resume in the affected area, the artifacts shall be recovered and features recorded using professional archaeological methods. The project archaeologist shall determine the amount of material to be recovered for an adequate artifact sample for analysis.
8) All cultural material collected during the grading monitoring program shall be processed and curated according to the current professional repository standards. The collections and associated records shall be transferred, including title, to an appropriate curation facility, to be accompanied by payment of the fees necessary for permanent curation.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

CULTURAL RESOURCES

ENPLANNERS

4.5-11
9) A report documenting the field and analysis results and interpreting the artifact and research data within the research context shall be completed and submitted to the satisfaction of the lead agency prior to the issuance of any building permits. The report will include DPR Primary and Archaeological Site Forms.

MM CUL-2: Human Remains - If human remains are encountered, California Health and Safety Code Section 7050.5 states that no further disturbance shall occur until the Riverside County Coroner has made the necessary findings as to origin.

Further, pursuant to Public Resource Code Section 5097.98(b), remains shall be left in place and free from disturbance until a final decision as to the treatment and disposition has been made. If the Riverside County Coroner determines the remains to be Native American, the Native American Heritage Commission (NAHC) shall be contacted within the period specified by law (24 hours). Subsequently, the NAHC shall identify the "most likely descendant." The most likely descendant shall then make recommendations and engage in consultation concerning the treatment of the remains as provided in Public Resources Code Section 5097.98.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CULTURAL RESOURCES

ENPLANNERS

4.5-12
This Page Intentionally Left Blank

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-1

4.6 ENERGY

4.6.1 INTRODUCTION
This section provides a summary of applicable impacts and mitigation measures identified in the 2001 EIR for the Approved Project, an overview of existing environmental conditions and regulatory requirements related to energy, and analyses of potential changes in impacts associated with energy consumption from implementation of the Modified Project in comparison to the Approved Project. Mitigation measures are recommended as necessary to reduce significant energy related impacts. No NOP comment letters, or Scoping Meeting comments were received pertaining to this topic.

This section of the Draft SEIR is based in part on the Green River Ranch Specific Plan Amendment, SP00-001 Amendment No.1, Energy Analysis, June 12, 2024, Urban Crossroads dated (Appendix G).

4.6.2 SUMMARY OF IMPACTS AND MITIGATION MEASURES FROM THE 2001 EIR
The following summarizes the determination from the 2001 EIR as it relates to energy impacts from the Approved Project.
a) Conflict with energy conservation plans?
As determined in the 2001 EIR, development of the Approved Project would not conflict with any adopted energy conservation plan by the City. Although the Approved Project would consume approximately 21,077 kilowatt hours of electricity per day, this was determined to be an insignificant amount of the electrical energy when compared to the amount of electricity supplied daily by Southern California Edison or of the energy consumption in the City. As a result, impacts were determined to be less than significant. b) Use of non-renewable resources?
Although energy in the form of fossil fuels and electricity would be utilized by construction vehicles and lighting during construction, post-construction, and occupancy use of the structures, the 2001 EIR determined construction of the Approved Project would not require use of large or wasteful amounts of fuel or energy. The use of energy to construct the Approved Project would be an irrevocable commitment of fossil fuel resources. However, the Approved Project would comply with the City's policies relevant to energy conservation, and would incorporate designs that include energy conservation features consistent with Uniform Building Code (UBC) standards and State Building Energy Efficiency Standards (under Title 24 of the California Administrative Code). Development of the Approved Project was not expected to use construction materials or energy in a wasteful or inefficient manner. As a result,

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-2
the 2001 EIR determined impacts from the approved Project’s use of non-renewable resources to be less than significant requiring no mitigation.

4.6.3 ENVIRONMENTAL SETTING
Due to the topography of the property, development has been limited to the northern portion of the GRRSP Planning Area. Previous on-site structures included two residential homes and horse boarding facilities (corrals, feed and tack storage containers, pasture, etc.) in the northern and flatter portions of the Project site south of Green River Road. Most of these structures and facilities have been removed after approval of the Approved Project. Currently, the GRRSP Planning Area is primarily undeveloped and vacant with the exception of drainage facilities installed within the hillside of the southeastern border of the site. As a result, the Planning Area does not consume energy.

Electricity
Electricity is a man-made resource. The production of electricity requires the consumption or conversion of renewable and non-renewable energy resources including water, wind, oil, gas, coal, solar, geothermal, and nuclear resources into energy. Electricity is used for a variety of purposes (e.g., lighting, heating, cooling, and refrigeration, and for operating appliances, computers, electronics, machinery, and public transportation systems).

The GRRSP Planning Area is within the service territory of Southern California Edison (SCE).

SCE provides electricity to more 15 million people, 180 incorporated cities, 15 counties, 5,000 large businesses, and 280,000 small businesses throughout its 50,000-square-mile service area.

According to the California Energy Commission (CEC), total electricity consumption in the SCE service area in 2022 was approximately 85,869 GWh. (31,603 GWh for the residential sector). Total electricity consumption in Riverside County in 2022 was 17,781 GWh (for residential and nonresidential sectors).

Natural Gas
Natural gas is a non-renewable fossil fuel. Natural gas is a combustible mixture of hydrocarbon compounds (primarily methane) that is used as a fuel source. Natural gas is found in naturally occurring reservoirs in deep underground rock formations. Natural gas is used for a variety of uses including heating buildings, generating electricity, and powering appliances such as stoves, washing machines and dryers, gas fireplaces, and gas grills.

The Southern California Gas Company (SoCalGas) is the natural gas service provider for the Project site. SoCalGas provides natural gas to approximately 21.8 million people in a 24,000 square-mile service area. According to the CEC, total natural gas consumption in the SoCalGas service area in 2022 was approximately 5,026 million therms (2,230 million therms for the residential sector). Total natural gas consumption in Riverside County in 2022 was approximately 431 million therms (284 million therms for the residential sector).

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-3
Petroleum Transportation Energy
Petroleum is also a non-renewable fossil fuel. According to the U.S. Energy Information Administration (EIA), gasoline is the most used transportation fuel in California, being consumed by passenger vehicles including light-duty cars, pickup trucks, and sport utility vehicles. According to the EIA, in 2021, total consumption of energy in California was 6,923 trillion British Thermal Units (BTU). In 2021, California consumed approximately 12,157 million gallons in motor gasoline (33.31 million per day) and approximately 3,541 million gallons of diesel fuel (9.7 million per day).

4.6.4 EXISTING REGULATIONS, PLANS, PROGRAMS, AND POLICIES

FEDERAL REGULATIONS
Intermodal Surface Transportation Efficiency Act Of 1991 (ISTEA) The ISTEA promoted the development of inter‐modal transportation systems to maximize mobility as well as address national and local interests in air quality and energy. ISTEA contained factors that Metropolitan Planning Organizations (MPOs) were to address in developing transportation plans and programs, including some energy‐related factors. To meet the new ISTEA requirements, MPOs adopted explicit policies defining the social, economic, energy, and environmental values guiding transportation decisions.

Transportation Equity Act for the 21st Century (TEA-21) The TEA‐21 was signed into law in 1998 and builds upon the initiatives established in the ISTEA legislation, discussed above. TEA‐21 authorizes highway, highway safety, transit, and other efficient surface transportation programs. TEA‐21 continues the program structure established for highways and transit under ISTEA, such as flexibility in the use of funds, emphasis on measures to improve the environment, and focus on a strong planning process as the foundation of good transportation decisions. TEA‐21 also provides for investment in research and its application to maximize the performance of the transportation system through, for example, deployment of Intelligent Transportation Systems, to help improve operations and management of transportation systems and vehicle safety.

STATE REGULATIONS
Integrated Energy Policy Report (IEPR)
Senate Bill 1389 (Bowen, Chapter 568, Statutes of 2002) requires the CEC to prepare a biennial integrated energy policy report that assesses major energy trends and issues facing the state’s electricity, natural gas, and transportation fuel sectors and provides policy recommendations to conserve resources; protect the environment; ensure reliable, secure, and diverse energy supplies; enhance the state’s economy; and protect public health and safety (Public Resources Code § 25301[a]). The CEC prepares these assessments and associated policy

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-4
recommendations every two years, with updates in alternate years, as part of the Integrated Energy Policy Report. The 2022 IEPR was adopted February 2023, and continues to work towards improving electricity, natural gas, and transportation fuel energy use in California.

The 2022 IEPR introduces a new framework for embedding equity and environmental justice at the CEC and the California Energy Planning Library which allows for easier access to energy data and analytics for a wide range of users. Additionally, energy reliability, western electricity integration, gasoline cost factors and price spikes, the role of hydrogen in California’s clean energy future, fossil gas transition and distributed energy resources are topics discussed within the 2022 IEPR.

State of California Energy Plan
The CEC is responsible for preparing the State Energy Plan, which identifies emerging trends related to energy supply, demand, conservation, public health and safety, and the maintenance of a healthy economy.

The Plan calls for the state to assist in the transformation of the transportation system to improve air quality, reduce congestion, and increase the efficient use of fuel supplies with the least environmental and energy costs. To further this policy, the plan identifies several strategies, including assistance to public agencies and fleet operators and encouragement of urban designs that reduce vehicle miles traveled (VMT) and accommodate pedestrian and bicycle access.

California Code Title 24, Part 6, Energy Efficiency Standards California Code of Regulations (CCR) Title 24 Part 6: The California Energy Code was first adopted in 1978 in response to a legislative mandate to reduce California’s energy consumption.

The standards are updated periodically to allow consideration and possible incorporation of new energy efficient technologies and methods. CCR, Title 24, Part 11: California Green Building Standards Code (CALGreen) is a comprehensive and uniform regulatory code for all residential, commercial, and school buildings that went in effect on January 1, 2009, and is administered by the California Building Standards Commission. CALGreen is updated on a regular basis, with the most recent approved update consisting of the 2022 California Green Building Code Standards that will be effective on January 1, 2023.

Local jurisdictions are permitted to adopt more stringent requirements, as state law provides methods for local enhancements. CALGreen recognizes that many jurisdictions have developed existing construction waste and demolition ordinances and defers to them as the ruling guidance provided, they establish a minimum 65% diversion requirement.

The code also provides exemptions for areas not served by construction waste and demolition recycling infrastructure. The State Building Code provides the minimum standard that

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-5
buildings must meet in order to be certified for occupancy, which is generally enforced by the local building official.

Energy efficient buildings require less electricity; therefore, increased energy efficiency reduces fossil fuel consumption and decreases greenhouse gas (GHG) emissions. The 2022 version of Title 24 was adopted by the CEC and will be effective on January 1, 2023.

The 2022 Title 24 standards would result in less energy use, thereby reducing air pollutant emissions associated with energy consumption in the SCAB and across the State of California.

For example, the 2022 Title 24 standards require solar photovoltaic systems for new homes, encourage the use of heat pumps for space and water heating, and require homes to be electric ready to ease the adoption of cleaner electric heating, cooking, and EV charging. The CEC anticipates that the 2022 energy code will provide $1.5 billion in consumer benefits and reduce GHG emissions by 10 million metric tons (19). The Project would be required to comply with the applicable standards in place at the time building permit document submittals are made.

These require, among other items (20):

Residential Mandatory Measures
• Electric vehicle (EV) charging stations. New construction shall comply with Section

4.106.4.1, 4.106.4.2, 4.106.4.3, to facilitate future installation and use of EV chargers.

Electric vehicle supply equipment (EVSE) shall be installed in accordance with the California Electrical Code, Article 625. (4.106.4).
o New one- and two-family dwellings and town-houses with attached private garages. For each dwelling unit, install a listed raceway to accommodate a dedicated 208/240-volt branch circuit. The raceway shall not be less than trade size 1 (nominal 1-inch inside diameter). The raceway shall originate at the main service or subpanel and shall terminate into a listed cabinet, box or other enclosure in close proximity to the proposed location of an EV charger. Raceways are required to be continuous at enclosed, inaccessible or concealed areas and spaces. The service panel and/or subpanel shall provide capacity to install a 40-ampere 208/240-volt minimum dedicated branch circuit and space(s) reserved to permit installation of a branch circuit overcurrent protective device.
o New hotels and motels. All newly constructed hotels and motels shall provide EV spaces capable of supporting future installation of EVSE. The construction documents shall identify the location of the EV spaces. The number of required EV spaces shall be based on the total number of parking spaces provided for all types of parking facilities in accordance with Table 4.106.4.3.1. • Water conserving plumbing fixtures and fittings. Plumbing fixtures (water closets and urinals) and fittings (faucets and showerheads) shall comply with Sections 4.303.1.1,

4.303.1.2, 4.303.1.3, and 4.303.1.4.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-6
• Outdoor potable water use in landscape areas. Residential developments shall comply with a local water efficient landscape ordinance or the current California Department of Water Resource ‘Model Water Efficient Landscape Ordinance (MWELO), whichever is more stringent.
• Operation and maintenance manual. At the time of final inspection, a manual, compact disc, web-based reference or other media acceptable to the enforcing agency which includes all of the following shall be placed in the building:
o Directions to the owner or occupant that the manual shall remain with the building throughout the life cycle of the structure.
o Operations and maintenance instructions for the following:

1. Equipment and appliances, including water-saving devices and systems, HVAC systems, photovoltaic systems, EV chargers, water-heating systems and other major appliances and equipment.

2. Roof and yard drainage, including gutter and downspouts.

3. Space conditioning systems, including condensers and air filters.

4. Landscape irrigation systems.

5. Water reuse systems.
o Information from local utility, water and waste recovery providers on methods to future reduce resource consumption, including recycle programs and locations. o Public transportation and/or carpool options available in the area. o Educational material on the positive impacts of an interior relative humidity between 30-60% and what methods an occupants may use to maintain the relative humidity level in that range.
o Information about water-conserving landscape and irrigation design and controllers which conserve water.
o Instructions for maintaining gutters and downspouts and the importance of diverting water at least 5 feet away from the foundation. o Information about state solar energy and incentive programs available. o A copy of all special inspection verifications required by the enforcing agency of this code.
o Information from CALFIRE on maintenance of defensible space around residential structures.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-7
• Any installed gas fireplace shall be direct-vent sealed-combustion type. Any installed woodstove or pellet stove shall comply with U.S. EPA New Source Performance Standards (NSPS) emission limits as applicable, and shall have a permanent label indicating they are certified to meet the emission limits. Woodstoves, pellet stoves and fireplaces shall also comply with applicable local ordinances. • Paints and coatings. Architectural paints and coatings shall comply with VOC limits in Table 1 of the CARB Architectural Suggested Control Measure, as shown in Table

4.504.3, unless more stringent local limits apply. The VOC content limit for coatings that do not meet the definitions for the specialty coatings categories listed in Table

4.504.3 shall be determined by classifying the coating as a Flat, Nonflat, or Nonflathigh Gloss coating, based on its glass, as defined in subsections 4.21, 4.36, and 4.37 of the 2007 CARB, Suggested Control Measure, and the corresponding Flat, Nonflat, Nonflat-high Gloss VOC limit in Table 4.504.3 shall apply.

Nonresidential Mandatory Measures
• Short-term bicycle parking. If the new project or an additional alteration is anticipated to generate visitor traffic, provide permanently anchored bicycle racks within 200 feet of the visitors’ entrance, readily visible to passers-by, for 5% of new visitor motorized vehicle parking spaces being added, with a minimum of one two-bike capacity rack (5.106.4.1.1).
• Long-term bicycle parking. For new buildings with tenant spaces that have 10 or more tenant-occupants, provide secure bicycle parking for 5% of the tenant-occupant vehicular parking spaces with a minimum of one bicycle parking facility (5.106.4.1.2). • Designated parking for clean air vehicles. In new projects or additions to alterations that add 10 or more vehicular parking spaces, provide designated parking for any combination of low-emitting, fuel-efficient and carpool/van pool vehicles as shown in Table 5.106.5.2 (5.106.5.2).
• EV charging stations. New construction shall facilitate the future installation of EV supply equipment. The compliance requires empty raceways for future conduit and documentation that the electrical system has adequate capacity for the future load. The number of spaces to be provided for is contained in Table 5.106. 5.3.3 (5.106.5.3).

Additionally, Table 5.106.5.4.1 specifies requirements for the installation of raceway conduit and panel power requirements for medium- and heavy-duty electric vehicle supply equipment for warehouses, grocery stores, and retail stores. • Outdoor light pollution reduction. Outdoor lighting systems shall be designed to meet the backlight, uplight and glare ratings per Table 5.106.8 (5.106.8).

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-8
• Construction waste management. Recycle and/or salvage for reuse a minimum of 65% of the nonhazardous construction and demolition waste in accordance with Section

5.408.1.1. 5.405.1.2, or 5.408.1.3; or meet a local construction and demolition waste management ordinance, whichever is more stringent (5.408.1). • Excavated soil and land clearing debris. 100% of trees, stumps, rocks and associated vegetation and soils resulting primarily from land clearing shall be reuse or recycled.

For a phased project, such material may be stockpiled on site until the storage site is developed (5.408.3).
• Recycling by Occupants. Provide readily accessible areas that serve the entire building and are identified for the depositing, storage, and collection of non-hazardous materials for recycling, including (at a minimum) paper, corrugated cardboard, glass, plastics, organic waste, and metals or meet a lawfully enacted local recycling ordinance, if more restrictive (5.410.1).
• Water conserving plumbing fixtures and fittings. Plumbing fixtures (water closets and urinals) and fittings (faucets and showerheads) shall comply with the following:
o Water Closets. The effective flush volume of all water closets shall not exceed 1.28 gallons per flush (5.303.3.1)
o Urinals. The effective flush volume of wall-mounted urinals shall not exceed 0.125 gallons per flush (5.303.3.2.1). The effective flush volume of floor- mounted or other urinals shall not exceed 0.5 gallons per flush (5.303.3.2.2). o Showerheads. Single showerheads shall have a minimum flow rate of not more than

1.8 gallons per minute and 80 psi (5.303.3.3.1). When a shower is served by more than one showerhead, the combine flow rate of all showerheads and/or other shower outlets controlled by a single valve shall not exceed 1.8 gallons per minute at 80 psi (5.303.3.3.2).
o Faucets and fountains. Nonresidential lavatory faucets shall have a maximum flow rate of not more than 0.5 gallons per minute at 60 psi (5.303.3.4.1). Kitchen faucets shall have a maximum flow rate of not more than 1.8 gallons per minute of 60 psi (5.303.3.4.2). Wash fountains shall have a maximum flow rate of not more than 1.8 gallons per minute (5.303.3.4.3). Metering faucets shall not deliver more than 0.20 gallons per cycle (5.303.3.4.4). Metering faucets for wash fountains shall have a maximum flow rate not more than 0.20 gallons per cycle (5.303.3.4.5). • Outdoor potable water uses in landscaped areas. Nonresidential developments shall comply with a local water efficient landscape ordinance or the current California Department of Water Resources’ Model Water Efficient Landscape Ordinance (MWELO), whichever is more stringent (5.304.1).

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-9
• Water meters. Separate submeters or metering devices shall be installed for new buildings or additions in excess of 50,000 sf or for excess consumption where any tenant within a new building or within an addition that is project to consume more than 1,000 gallons per day (GPD) (5.303.1.1 and 5.303.1.2).
• Outdoor water uses in rehabilitated landscape projects equal or greater than 2,500 sf.

Rehabilitated landscape projects with an aggregate landscape area equal to or greater than 2,500 sf requiring a building or landscape permit (5.304.3). Commissioning. For new buildings 10,000 sf and over, building commissioning shall be included in the design and construction processes of the building project to verify that the building systems and components meet the owner’s or owner representative’s project requirements (5.410.2)
AB 1493 Pavley Regulations And Fuel Efficiency Standards California AB 1493, enacted on July 22, 2002, required CARB to develop and adopt regulations that reduce GHGs emitted by passenger vehicles and light duty trucks. Under this legislation, CARB adopted regulations to reduce GHG emissions from non-commercial passenger vehicles (cars and light-duty trucks). Although aimed at reducing GHG emissions, specifically, a co-benefit of the Pavley standards is an improvement in fuel efficiency and consequently a reduction in fuel consumption.

California’s Renewable Portfolio Standard (RPS)
First established in 2002 under Senate Bill (SB) 1078, California’s Renewable Portfolio Standards (RPS) requires retail sellers of electric services to increase procurement from eligible renewable resources to 33% of total retail sales by 2020.

Clean Energy And Pollution Reduction Act Of 2015 (SB 350) In October 2015, the legislature approved, and the Governor signed SB 350, which reaffirms California’s commitment to reducing its GHG emissions and addressing climate change. Key provisions include an increase in the renewables portfolio standard (RPS), higher energy efficiency requirements for buildings, initial strategies towards a regional electricity grid, and improved infrastructure for electric vehicle charging stations. Specifically, SB 350 requires the following to reduce statewide GHG emissions:
• Increase the amount of electricity procured from renewable energy sources from 33% to 50% by 2030, with interim targets of 40% by 2024, and 25% by 2027. • Double the energy efficiency in existing buildings by 2030. This target will be achieved through the California Public Utility Commission (CPUC), the California Energy Commission (CEC), and local publicly owned utilities.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-10
• Reorganize the Independent System Operator (ISO) to develop more regional electrify transmission markets and to improve accessibility in these markets, which will facilitate the growth of renewable energy markets in the western United States (California Leginfo 2015).
100 Percent Clean Energy Act Of 2018 (SB 100)
In September 2018, the legislature approved, and the Governor signed SB 100, which builds on the targets established in SB 1078 and SB 350. Most notably, SB 100 sets a goal of powering all retail electricity sold in California with renewable and zero-carbon resources. Additionally, SB 100 updates the interim renewables target from 50% to 60% by 2030.

REGIONAL REGULATIONS
There are no regional energy regulations that apply to the Modified Project.

LOCAL REGULATIONS
City of Corona Climate Action Plan (CAP)
In June 2020, the City adopted the 2019 CAP Update, which includes an interim goal of reducing GHG emission to 49% below 2008 levels by the year 2030 and a longer-term GHG reduction goal of 66% below 2008 levels by 2040. The interim and longer-term goals put the City on a path toward the state’s long-term goal to reduce emissions 80% below 1990 levels by 2050. The 2019 CAP Update (establishes goals and policies that encourage energy efficiency, water conservation, alternative transportation, solid waste reduction, and clean energy.

To meet the established 2020 Reduction Target, the current CAP includes various reduction measures across several sectors that include transportation, energy, water, solid waste, and agriculture. The reduction measures encompass both state- and local-based measures.

Identified state-based measures related to energy include compliance with the Building Energy Efficiency Standards and CALGreen and utilities meeting the RPS. The 2012 CAP also includes energy-related local-based measures, which are measures the City can implement that are beyond statewide measures.

The Modified Project shall implement Screening Table Measures providing for a minimum of 100 points per the City’s CAP Screening Tables. The Project would be consistent with the CAP’s requirement to achieve at least 100 points for both the residential and non-residential portions of the Project and thus the Project is considered to have a less than significant individual and cumulatively considerable impact on GHG emissions. The City shall verify incorporation of the identified Screening Table Measures within the Project building plans and site designs prior to the issuance of building permit(s) and/or site plans (as applicable). Projects

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-11
that achieve a total of 100 points or more are considered to have a less than significant individual and cumulative impact on GHG emissions.

City of Corona 2020–2040 General Plan
Circulation Element
Policy CE-1.4 Design and employ traffic control measures to ensure City streets and roads function with safety and efficiency.

Policy CE-1.7 Limit driveway and local street access on arterial streets to maintain a desired quality of traffic flow. Wherever possible, consolidate driveways and implement access controls during redevelopment of adjacent parcels.

Policy CE-3.1 Implement and maintain traffic signal coordination and advanced traffic management strategies throughout the City to the maximum extent practicable and integrate signal systems with adjacent jurisdictions and Caltrans.

Policy CE-3.2 Implement, maintain, and enforce the traffic demand and system management recommendations in the South Coast Air Quality Management District’s Air Quality Management Plan and in the Riverside County Congestion Management Program.

Policy CE-3.3 Encourage employers to reduce vehicular trips by offering to employees commute trip reduction programs, such as transit fare subsidies, alternative work schedules and telecommuting, employer-sponsored van pools or shuttles, ride share programs, and bike share.

Policy CE-4.1 Maintain local fixed-route and demand-responsive transit service to ensure mobility within Corona and to ensure that users have adequate access to public facilities, services, and employment options.

Policy CE-4.2 Work with the Riverside Transit Agency to identify needs for additional bus services and enhancements to existing services.

Policy CE-4.3 Encourage the development of additional regional public transportation services and facilities, including park-and-ride near the SR-91 and I-15 freeways and mobility hubs at key transit stations.

Policy CE-4.4 Ensure public transit opportunities (e.g., fixed-route buses, paratransit) for elderly and disabled persons and accessibility of such services by elderly and disabled persons.

Policy CE-4.5 Encourage employers to reduce single-occupant vehicular trips by providing employee incentives (e.g., reduced rate transit passes).

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-12
Policy CE-4.6 Require new development to provide transit facilities, such as bus shelters and turnouts, where deemed necessary, to encourage the use of transit and other alternative forms of transportation.

Policy CE-4.7 Preserve options for expanding future transit use when designing improvements for roadways or redeveloping major developments and including areas for transit facilities.

Policy CE-4.8 Encourage access to and the expansion of regional rail transportation facilities and services at the Metrolink stations to increase ridership.

Policy CE-4.9 Encourage the development of bus rapid transit systems along major transportation corridors where feasible.

Policy CE-4.10 Improve first/last mile connections to improve transit use and accessibility. Explore use of transportation network companies, micro-transit, and other emerging technologies to strengthen the transit system.

Policy CE-5.1 Provide for safety of bicyclists, equestrians, and pedestrians by adhering to national standards and uniform practices; adhere to accessibility requirements for people with disabilities.

Policy CE-5.2 Maintain existing pedestrian facilities and encourage new development to provide walkways between and through developments.

Policy CE-5.3 Provide for safe accessibility to and use of pedestrian facilities by people with disabilities to implement accessibility requirements under the American with Disabilities Act.

Policy CE-5.4 Develop bicycle routes in accordance with the City’s adopted Bicycle Master Plan and implement other elements of that plan.

Policy CE-5.5 Develop and maintain a bikeway system that provides connections to routes of neighboring jurisdictions and regional bikeways.

Policy CE-5.6 Encourage new and existing development to provide accessible and secure areas for bicycle storage. Provide bicycle racks or storage facilities at public facilities and require bicycle parking, storage, and other support facilities as part of new office and retail developments.

Policy CE-5.7 Use easements and/or rights-or-way along flood control channels, public utilities, railroads, and streets wherever possible for bikeways and equestrian and hiking trails.

Policy CE-5.8 Improve bicycling and pedestrian safety by minimizing conflict points (e.g., bicycle and vehicle crossings) with motorized traffic, separating bike routes and truck

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-13
routes where possible, or adding and improving existing facilities with buffers/barriers to separate bikes from vehicle lanes.

Policy CE-5.9 Coordinate with the Riverside County General Plan and the Santa Ana River Trails Plan to create an uninterrupted Class I bicycle route through Corona that connects to the Santa Ana River Trail in surrounding cities.

Policy CE-5.10 Encourage and support safe bicycle riding on City streets. Provide bicycle safety and education programs through public outreach. Support future bikeway designs that minimize bicycle conflicts with vehicles, separate bikeways from vehicles where possible, and lower bicycle level of stress.

Policy CE-6.1 Provide primary truck routes on selected arterial streets that will serve the business community while minimizing the impacts of through truck traffic into residential areas.

Policy CE-7.3 Encourage employers to include strategic parking provisions in new developments, where feasible, to encourage the use of transit and other modes of travel rather than single-occupancy autos.

Land Use Element
Policy LU-1.2 Emphasize the development of uses that sustain Corona as a cohesive, distinct, and self- sustaining community and minimize the need for residents to travel to surrounding communities for retail goods, services, and employment.

Policy LU-6.1 Promote sustainable features in new construction and significant renovations, including the use of locally sourced, recycled, and sustainable-sourced building materials, energy- and water-efficient building design, integrated renewable energy and energy storage systems, and waste minimization during construction.

Policy LU-6.2 Require that new residential, commercial, office, and industrial development be designed to minimize consumption of and sustain scarce environmental resources through:
• Site Design – concentration and intermixing of development to minimize vehicular trips and promote walking and building orientation for solar access and heat gain and loss.
• Landscaping – drought tolerant species, use of recycled water for irrigation, and other purposes.
• Capture of rainwater and re-use on site.
• Building design and construction materials-energy and water efficient fixtures, recycled building materials, insulation and wall thickness, permeable paving surfaces and comparable techniques.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-14
Policy LU-10.6 Establish a multi-use trail system that connects the rural and estate neighborhoods adjoining open spaces and parklands. These may be developed for pedestrians, bicycles, and/or for horseback riding where allowed by zoning.

Policy LU-11.6 Require that transit-supporting facilities, such as bus turnouts, passenger drop-offs, and shelters, be incorporated in new commercial centers or when subject to major renovation and improvement, where appropriate to support local, citywide, and regional transit systems. The location and type of facility should be coordinated with transit agencies.

Policy LU-12.7 Regulate the development of industrial uses (consistent with local regulation and state law) that use, store, produce, or transport toxic and hazardous materials; generate unacceptable levels of air or noise pollution; or result in other adverse impacts.

Policy LU-13.2 Limit retail commercial and professional office uses within a mixedresidential- commercial/office use development to those uses that are compatible with residential uses.

Policy LU-13.3 Require that adequate open space and, for larger projects, recreational facilities be incorporated into mixed-use development projects to meet the need of their residents and improve overall aesthetics.

Housing Element (2021-2029)
Policy H-1.4 Support the development of sustainable projects that reduce demand for water and energy resources, reduce commute times and operational costs, and provide for transitoriented development.

Environment Resources Element
Policy ER-12.4 Continue to expand the City-owned fleet of vehicles to alternative fuels, such as methanol or other clean-burning energy sources, as technology becomes feasible and cost-effective.

Policy ER-12.14 Reduce energy consumed by commercial and residential uses by requiring the use and installation of energy conservation features in all new construction projects and wherever feasible, retrofitting existing and redevelopment projects.

Policy ER-13.1 Maintain and periodically update a comprehensive Climate Action Plan that detail the City’s strategies to reduce GHG emissions and to ensure ongoing and sustained reduction of GHG emissions from all sectors to meet 2020, 2030, and 2040 reduction targets.

Policy ER-13.2 Encourage the maximum feasible energy efficiency in site design, building orientation, landscaping, and utilities/infrastructure for all development and redevelopment projects (residential, commercial, industrial, and public agency) to support GHG emissions reductions.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-15
Policy ER-13.3 Evaluate opportunities to reduce energy use and the urban heat island effect through site and building design, materials and landscaping, such as reflective roofs or pavement, vegetated roofs, pervious pavement, shade trees, and re-vegetation of paved areas.

Policy ER-13.4 Support the increase of clean energy supply to existing and new development and municipal facilities through means to include, but not be limited to: onsite or other local renewable energy sources for new and existing buildings and infrastructure.

Infrastructure and Utilities Element
Policy IU-2.1 Continue to implement the City’s water conservation and reuse efforts; review these programs regularly, and modify them as appropriate and feasible.

Policy IU-2.2 Establish guidelines and standards for water conservation and actively promote use of water conserving devices and practices in new construction, major alterations and additions to existing buildings, and retrofitting of irrigation systems where feasible.

Policy IU-2.3 Require incorporation of best available technologies for water conservation, internally and externally, in new construction and associated site design.

Policy IU-2.4 Expand the recycled water program to provide water for landscaped medians and other appropriate open spaces along SR-91 and I-15, in coordination with Caltrans when feasible.

Policy IU-2.5 Require that sewer flows be minimized in existing and future developments through water conservation and recycling efforts.

Policy IU-2.6 Encourage the use of recycled water by industrial, commercial, and institutional users through the use of incentives such as differential pricing; require recycled water use for landscaped irrigation, grading, and other noncontact uses in new projects, where feasible.

Policy IU-2.7 Require the use of recycled water for landscaped irrigation, grading, and other noncontact uses in new developments, parks, golf courses, sports fields, and comparable uses, where feasible.

Policy IU-2.8 Continue to provide and support public educational efforts to residents, business, and students regarding the importance of water conservation and recycled water use.

Policy IU-2.9 Require that grading plans be designed and implemented to reduce stormwater runoff by capturing rainwater onsite and storing on a temporary, short-term basis to facilitate groundwater recharge rather than relying solely on community drainage facilities.

Policy IU-2.10 Require the use of rainwater capture and storage facilities, techniques, and improvements in residential and nonresidential developments to further objectives for water conservation.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-16
Policy IU-7.1 Require that new development is approved contingent upon its ability to be served with adequate natural gas, energy facilities, and other critical infrastructure.

Policy IU-7.2 Coordinate with energy providers and the City Department of Power and Water to ensure that adequate services and facilities will meet SB 100 guidelines and the demand of existing and future developments, and be compatible with adjacent uses in Corona.

Policy IU-7.5 Continue to require and regulate the undergrounding of electrical poles and wires in accordance with the Corona Municipal Code.

Policy IU-7.6 Continue to expand the supply of rooftop solar energy systems at public facilities and improve energy efficiency in City operations and capital improvements.

Policy IU-7.7 Encourage the reduction of energy consumption through passive solar building orientation as well as the installation of rooftop solar energy systems and energyefficient technologies.

Policy IU-7.8 Continue to inform the community of rebates and other supportive programs for energy efficient building improvements, appliances, and alternative energy systems.

4.6.5 PROJECT DESIGN FEATURES
No Project Design Features are proposed for the Modified Project.

4.6.6 THRESHOLDS OF SIGNIFICANCE
Based on the relevant CEQA Guidelines as currently implemented by the City of Corona, significant impacts related to energy would occur if the proposed Project or any Project-related component would:

Threshold EN-1 Result in potentially significant environmental impact due to wasteful, inefficient, or unnecessary consumption of energy resources, during project construction or operation?
Threshold EN-2 Conflict with or obstruct a state or local plan for renewable energy or energy efficiency?
With regard to Threshold EN-1, this analysis relies upon Appendix F of the State CEQA Guidelines. Appendix F of the State CEQA Guidelines was prepared in response to the requirement in PRC Section 21100(b)(3), which states that an EIR shall include a detailed statement setting forth “mitigation measures proposed to minimize significant effects of the environment, including, but not limited to, measures to reduce the wasteful, inefficient, and unnecessary consumption of energy.” In addition, Appendix F of the State CEQA Guidelines states that the means of achieving the goal of energy conservation includes the following:

1. Decreasing overall per capita energy consumption,

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-17

2. Decreasing reliance on fossil fuels such as coal, natural gas and oil, and

3. Increasing reliance on renewable energy sources.

METHODOLOGY
The analysis of electricity/natural gas usage is based on the CalEEMod Version 2022.1 modeling conducted by Urban Crossroads (June 2024) which quantifies energy use for the Modified Project operations. This energy study utilizes the different fuel types for each vehicle class from the annual EMFAC2021 emission inventory in order to derive the average vehicle fuel economy which is then used to determine the estimated annual fuel consumption associated with vehicle usage during Project construction and operational activities. For purposes of analysis, the 2024, 2025 and 2026 analysis years were utilized to determine the average vehicle fuel economy used throughout the duration of the Modified Project.

Information from the CalEEMod outputs for the Modified Project AQ Analysis was utilized in the Energy Analysis, detailing the Modified Project related construction equipment, transportation energy demands, and facility energy demands.

4.6.7 ENVIRONMENTAL IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Impacts
Would the
Modified
Project result
in new or
more severe
impacts
requiring
revisions to
the Prior EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions to
the Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the Modified
Project requiring
revisions to the
Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

EN-1 Result in potentially
significant
environmental impact
due to wasteful,
inefficient, or
unnecessary
consumption of energy
resources, during
project construction or
operation?
EN-2 Conflict with or
obstruct a state or local
plan for renewable
energy or energy
efficiency?

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-18

IMPACTS ASSOCIATED WITH THE MODIFIED PROJECT
Impact EN-1: Result in potentially significant environmental impact due to wasteful, inefficient, or unnecessary consumption of energy resources, during project construction or operation?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

Construction
Construction of the Modified Project would require energy for the manufacture and transportation of construction materials, preparation of the site for grading and building activities, and construction of the building. All or most of this energy would be derived from nonrenewable resources. Petroleum fuels (e.g., diesel and gasoline) would be the primary sources of energy for these activities.

Construction of the Modified Project is proposed to be developed in three (3) phases. Phase 1 would include the construction of the 746,167 square-foot BPI Development within PAs 1, 2, and 3. Phase 2 would include Phase 1 plus the construction of PA 4 comprised of 19,600 square feet of GC uses. Project buildout Phase 3 would include Phases 1 and 2 plus the addition of 32 ER residential lots. Construction of PAs 1, 2, and 3 is expected to occur over 11 months, and construction of PAs 4 and 5 would occur over seven (7) months.

Based on estimations provided in the Energy Analysis prepared for the Modified Project, the estimated total electricity usage during construction, after full Project build-out, was calculated to be approximately 549,793 kWh. In addition, construction-related vehicle trips would result in approximately 1.28 million VMT and consume an estimated 271,647 gallons of gasoline and diesel combined. The construction-related equipment would not be powered by natural gas and no natural gas demand is anticipated during construction, therefore would not involve the consumption of natural gas.

Construction equipment use of fuel would not be atypical for the type of construction proposed because there are no aspects of the Project’s proposed construction process that are unusual or energy-intensive, and Project construction equipment would conform to the applicable CARB emissions standards, acting to promote equipment fuel efficiencies. In addition, CCR Title 13, Title 13, Motor Vehicles, section 2449(d)(3) Idling, limits idling times of construction vehicles to no more than 5 minutes, thereby precluding unnecessary and wasteful consumption of fuel due to unproductive idling of construction equipment. BACMs inform construction equipment operators of this requirement. Enforcement of idling limitations is realized through periodic site inspections conducted by City building officials, and/or in response to citizen complaints.

Moreover, given the cost of fuel, contractors and owners have a strong financial incentive to avoid wasteful, inefficient, and unnecessary consumption of energy during construction.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-19
Although the temporary nature of construction and the financial incentives for owners and contractors to use energy-consuming resources in an efficient manner, the construction phase of the Modified Project would not result in wasteful, inefficient, and unnecessary consumption of energy. Therefore, the construction-related impacts related to electricity and fuel consumption would be less than significant and no mitigation is required.

Operation
Electricity and Natural Gas
Operation of the Modified Project would consume energy as part of building operations and transportation activities. Building operations would involve energy consumption for multiple purposes including, but not limited to, building heating and cooling, refrigeration, lighting, and electronics. Based on CalEEMod energy use estimations, operations for the Modified Project would result in approximately 15,108,857 kWh of electricity and 23,731,098 kBTU per year of natural gas annually.

Development of the Modified Project would be designed and constructed in accordance with the City’s latest adopted energy efficiency standards, which are based on the California Title 24 energy efficiency standards. Title 24 standards include a broad set of energy conservation requirements that apply to the structural, mechanical, electrical, and plumbing systems in a building. For example, the Title 24 Lighting Power Density requirements define the maximum wattage of lighting that can be used in a building based on its square footage. Title 24 standards are widely regarded as the most advanced energy efficiency standards, would help reduce the amount of energy required for lighting, water heating, and heating and air conditioning in buildings and promote energy conservation. Therefore, operational impacts related to electricity and natural gas consumption would be less than significant requiring no mitigation.

Fuel
Operational gasoline and diesel energy would also be consumed during vehicle trips associated with the Modified Project. Fuel consumption would be primarily related to passenger vehicle use by residents, visitors, and employees as well truck trips to and from the BPI and commercial uses. Based on CalEEMod energy use estimations, project-related vehicle trips would result in approximately 28.78 million VMT and consume an estimated 1,522,736 gallons of gasoline and diesel combined, annually.

The Modified Project is partially surrounded by urban uses, and the availability of existing transportation facilities and infrastructure would provide future residents, visitors, and employees associated with the Modified Project good access to a mix of nearby land uses, further reducing fuel consumption demand. Additionally, the Modified Project would provide parking and EV infrastructure that would further promote fuel efficient vehicles. For these reasons, operational-related transportation fuel consumption would not result in a significant environmental impact due to wasteful, inefficient, or unnecessary consumption of energy

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-20
resources. Therefore, the operational impact related to vehicle fuel consumption would be less than significant requiring no mitigation.

Construction Plus Operation
Overall, the Modified Project would not result in a wasteful, inefficient, or unnecessary of energy resources during Project construction or operation. Impacts would be less than significant requiring no mitigation. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact EN-2: Conflict with or obstruct a state or local plan for renewable energy or energy efficiency?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

Construction
As previously discussed in Impact EN-1, the Modified Project would result in energy consumption through the combustion of fossil fuels in construction vehicles, worker commute vehicles, and construction equipment, and the use of electricity for temporary buildings, lighting, and other sources. California Code of Regulations Title 13, Sections 2449 and 2485, limit idling from both on- road and off-road diesel-powered equipment and are enforced by the ARB. The Modified Project would comply with these regulations. There are no policies at the local level applicable to energy conservation specific to the construction phase. Thus, it is anticipated that construction of the Modified Project would not conflict with any applicable plan, policy, or regulation adopted for the purpose of reducing energy use or increasing the use of renewable energy. Therefore, construction- related energy efficiency and renewable energy standards consistency impacts would be less than significant requiring no mitigation.

Operation
California’s Renewable Portfolio Standard (RPS) establishes a goal of renewable energy for local providers to be 44 percent by 2040. Similarly, the State is promoting renewable energy target to meet the 2022 Scoping Plan greenhouse gas emissions reductions. As previously discussed in Impact EN-1, the Modified Project would result in approximately 15,108,857 kWh of electricity and 23,731,098 kBTU/year of natural gas annually.

Future development projects would be designed and constructed in accordance with the City’s latest adopted energy efficiency standards, which are based on the California Title 24 energy efficiency standards. Title 24 standards include a broad set of energy conservation

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024
ENERGY

ENPLANNERS

4.6-21
requirements that apply to the structural, mechanical, electrical, and plumbing systems in a building. For example, the Title 24 Lighting Power Density requirements define the maximum wattage of lighting that can be used in a building based on its square footage. Title 24 standards are widely regarded as the most advanced energy efficiency standards, would help reduce the amount of energy required for lighting, water heating, and heating and air conditioning in buildings and promote energy conservation.

Compliance with the aforementioned mandatory measures would ensure that future development projects would not conflict with any applicable plan, policy, or regulation adopted for the purpose of reducing energy use or increasing the use of renewable energy.

Therefore, operational energy efficiency and renewable energy standards consistency impacts would be less than significant requiring no mitigation.

Construction Plus Operation
Overall, the Modified Project would be consistent with applicable plans and policies and would not result in wasteful or inefficient use of nonrenewable energy sources. Impacts would be less than significant. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the or the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

4.6.8 CUMULATIVE IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Less Than Significant Impact/No Changes or No New Information Requiring Preparation of an EIR.

Development of the proposed BPI Development would be required to comply and be consistent with obligatory energy efficiency requirements in the City’s General Plan and Development Code as well as all obligatory State-level energy programs and requirements. Similarly, as future development projects within PAs 4 and 5 of the GRRSP are received and reviewed by the City in subsequent years, those projects would also be reviewed for compliance consistency with the General Plan and Development Code and all relevant State-level energy programs and requirements. All development associated with the Modified Project would implement the most current version of Title 24 energy efficiency requirements, as required by State law.

Consistency with the General Plan, Development Code and other mandatory State-level programs would ensure that the Modified Project’s contributions to inefficient, wasteful or unnecessary energy use would be less than significant. Moreover, as identified above, implementation of the Modified Project would not be expected to cause an inefficient, wasteful, or unnecessary use of energy resources nor conflict with or obstruct a state or local

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1
ENERGY

ENPLANNERS

4.6-22
plan for renewable energy or energy efficiency. As a result, the Modified Project’s incremental contribution to cumulative energy impacts would be less than cumulatively considerable requiring no mitigation.

4.6.9 MITIGATION MEASURES IDENTIFIED IN PRIOR EIR APPLICABLE TO

MODIFIED PROJECT
No mitigation measures related to energy were included in the 2001 EIR, although numerous measures were included as part of mitigation for Air Quality impacts.

4.6.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT No mitigation measures are required.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-1

4.7 GEOLOGY AND SOILS

4.7.1 INTRODUCTION
This section provides a summary of applicable impacts and mitigation measures from the 2001 EIR, an overview of existing geology, soils, seismicity, and paleontological resources within the GRRSP Planning Area and surrounding region, a summary of applicable regulations, and analyses of potential changes in impacts to geology and soils from implementation of the Modified Project in comparison to the Approved Project. No NOP comment letters, or Scoping Meeting comments were received pertaining to this topic.

This section of the Draft SEIR is based on the EIR-Level Geotechnical Study prepared by Petra Geosciences, Inc., dated August 12, 2020 (Appendix H-1), the Update of EIR-Level Geotechnical Study prepared by Petra Geosciences, Inc., dated January 31, 2024 (Appendix H-2), and the Paleontological Resource Record Search Update for the Green River Ranch III Project, prepared by Brian F. Smith and Associates, revised January 10, 2024 (Appendix H3).

4.7.2 SUMMARY OF IMPACTS AND MITIGATION MEASURES FROM THE 2001 EIR
The Approved Project impact analysis related to geology and soils as presented in the 2001 EIR as well as any mitigation measures identified to reduce significant impacts are summarized as follows.

Geology and Soils
a) Exposes people or structures to major geologic hazards, including but not limited to: strong ground motion, faulting, ground rupture, slope instability, liquefaction, soil settlement and/or expansion, erosion, and/or seismic induced flooding.

The 2001 EIR evaluated the significance of geologic hazards as it relates to the development of the Approved Project. The 2001 EIR determined the Approved Project site is not traversed by any identified faults, and potential impacts resulting for on-site ground rupture were determined to be less than significant. The 2001 EIR determined significant impact from expansion or settlement of on-site soils is expected to occur, and based on the results of laboratory testing, the Approved Project’s on-site surface and near surface soils exhibit very low expansion potential. The 2001 EIR concluded properly compacted-engineered fill would generally possess adequate strength and consolidation characteristics to support the Approved Project’s commercial structures without detrimental settlement. Due to relatively low existing groundwater depths, the 2001 EIR determined potential impacts associated with liquefaction to be less than significant.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-2
The 2001 EIR identified the nearest active fault to be the Elsinore Fault. The northern branch of the fault is located 300 feet south of the southern property line and the main branch approximately 2,200 feet to the south. The 2001 EIR acknowledged close proximity to the Elsinore Fault would create the potential for moderate to severe ground shaking from an earthquake generated along this fault. As such, the 2001 EIR determined with implementation of mitigation measure MM 4.10.1A, ground shaking hazards would be reduced to a less than significant level. MM 4.10.1A would require that all on-site structures be designed and constructed in accordance with the City’s existing seismic code. b) Permits development in areas of unsuitable geologic conditions.

The 2001 EIR determined the commercial and industrial portions of the Approved Project consist of alluvial materials considered unsuitable to support the anticipated structures resulting from development of the GRRSP. The 2001 EIR determined the specific recommendations and design standards contained in the Approved Project’s geotechnical report should be applied to all construction resulting from the GRRSP as stated in mitigation measures MM 4.10.2A through 4.10.2L. The 2001 EIR determined with implementation of mitigation measure, MM 4.10.2A through 4.10.2L, impacts associated with the unsuitable alluvium materials would be reduced to below a level of significance. c) Creates substantial erosion or otherwise diminishes soil as a natural resource.

The 2001 EIR evaluated the significance of erosion as it relates to alluvium slope raveling and slope instability. The 2001 EIR noted the southern portion of the industrial and commercial pad areas would located in cut areas and therefore older alluvial materials would be exposed at pad grade. The 2001 EIR concluded this creates the potential for alluvium slope raveling and slope instability. The 2001 EIR determined the specific recommendations and design standards contained in the Approved Project’s geotechnical report should be applied to all construction resulting from the GRRSP as stated in mitigation measures MM 4.10.3A through MM 4.10.3E. With implementation of MM 4.10.3A through MM 4.10.3E, , potential impacts related to slope stability would be reduced to less than significant. d) Alteration or destruction of any significant paleontological resource.

The 2001 EIR analyzed the Approved Project’s potential to impact paleontological resources and determined the Approved Project would produce indirect and direct adverse impacts to significant non-renewable paleontological resources as the parcel is developed or after construction has ceased. The 2001 EIR determined excavation and grading of the Approved Project would require mitigation to reduce the potential impact. The 2001 EIR identified Mitigation Measure MM 4.9.1A to be implemented to assure the protection of potential subsurface paleontological resources that may be unearthed during earth moving activities. MM

4.9.1.A requires the applicant to retain a qualified vertebrate paleontologist, approved by the City, to develop a Paleontological Resources Impact Mitigation Program (PRIMP). The

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-3
PRIMP would be reviewed by the City of Corona Planning Department for consistency with the paleontology resource impact mitigation guidelines from both Riverside County and the Society of Vertebrate Paleontology. The 2001 EIR determined impacts to paleontological resources would be reduced to a less than significant level with implementation of the Mitigation Measure MM 4.9.1A.

Cumulative Impacts
The 2001 EIR determined the potential impacts related to the geology and paleontological resources from development of the Approved Project site would be reduced to less than significant with mitigation incorporated. Impacts related to earthquakes and construction on alluvial material were identified, and appropriate mitigation provided. The 2001 EIR stated development of the Approved Project site would contribute to the alteration of the existing topography in the region and any new development within the region had the potential of exposing a greater population to regional and site-specific seismic hazards. The 2001 EIR noted seismic impacts could only be mitigated through appropriate site planning and building design, and adherence to identified mitigation measures would reduce potential seismic and soil erosion impacts to less than significant levels.

In addition, the 2001 EIR noted the cumulative impact area for paleontological resources are the Ladd and Paleocene Silverado formations, which are known to contain significant fossils.

The 2001 EIR determined future development within this area would result in potential loss of paleontological resources. To the extent that each development project implements appropriate mitigation during earth moving activities (as is the case for the Approved Project), cumulative impacts to paleontological resources were determined to be reduced to below a level of significance. The 2001 EIR acknowledged that pursuant to the provisions of CEQA, development project within the cumulative impact area that require a discretionary action by a public agency would be assessed for its impact on paleontological resources and it is reasonable to assume appropriate mitigation would be implemented.

Overall, the 2001 EIR determined implementation of the Approved Project would not contribute to cumulative impacts related to potential geologic and seismic hazards and paleontological resources with mitigation incorporated.

4.7.3 ENVIRONMENTAL SETTING
The Modified Project site is located along the northern flank of the Santa Ana Mountains in western Riverside County. The Santa Ana River Valley and Prado Dam are located to the north.

Rugged hillside terrain of the Santa Ana Mountains is located to the south. Tertiary through Cretaceous bedrock formations have been mapped in the Santa Ana Mountains in the Project vicinity. These formations include the upper Cretaceous Ladd Formations, the Paleocene Silverado Formation, and the Middle Eocene Santiago Formation. These formations are comprised of sedimentary rocks ranging in composition from sandstone to shale. Quaternary

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-4
deposits on site and to the north include younger and older alluvium. The older alluvium was deposited from ancestral stream channels to the Santa Ana River. Younger alluvium has been deposited from the Santa Ana River and tributary canyons from the Santa Ana Mountains.

Topography
The GRRSP Planning Area consists of approximately 160.0 acres. Elevations range from 1,110 feet AMSL in the southwestern corner of the Modified Project site to 515 feet amsl in the northeastern corner of the property. Maximum relief of the site is 595 feet.

The southern portion of the Modified Project site is dominated by rugged hillside terrain of the Santa Ana Mountains. Northerly trending ridges with intervening northerly draining tributary canyons originate from the high terrain in the southern portion of the Modified Project site.

Natural slopes in this area range from 4:1 horizontal to vertical along the ridges to 1.5:1 horizontal to vertical on the descending slopes.

Site Geology
On-site geology is consistent with the regional geology. Bedrock underlying the southern portion of the Modified Project area is assigned to the Paleocene Silverado Formation while bedrock in the middle portion of the site has been assigned to the middle Eocene Santiago Formation. Older alluvium has been mapped on the northern slope flanks while young alluvium has been mapped along the stream channels and gently sloping areas further north.

The bedrock structure of the Modified Project area is dominated by east-west trending steeply southerly dipping overturned bedding in the south. The southern portion of the Project area is underlain by the Paleocene Silverado Formation comprised of brownish-yellow to greenishgray marine sandstone and coarse-grained micaceous feldspathic nonmarine continental sandstone and conglomerate. The south central portion of the Modified Project site is underlain by the middle Eocene Santiago formation comprised of white to brownish-yellow massive coarse-grained sandstone and conglomerate. Gray sandstone, sandy siltstone, and conglomerate also occur with this formation. The Santiago formation overlies the Silverado formation.

The hillside terrain in the north-central portion of the Modified Project site is underlain by older alluvium. Older alluvium consists of reddish-brown clayey sand with abundant wellrounded pebbles and cobble beds and lenses. Older alluvial deposits observed on site displayed approximate horizontal stratification. Alluvium located in the northern portion of the site and in the southerly flowing tributary stream drainages consists of silty to clayey sand with common pebble and cobble beds and lenses, while boulder size materials were encountered in exploratory pits in the tributary canyon areas. Artificial fill occurs in the vicinity of the prior equestrian uses and the existing concrete reservoir in the eastern portion of the Project area.

Artificial fill consists of alluvial and older alluvial materials that have been moved to create pad areas, berms, and reservoirs. Generally, on-site artificial fill is loose and non-compacted.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-5
Seismicity
The GRRSP Planning Area is located in a region within Southern California that is characterized by moderate to high seismic activity. The Project area is located in relatively close proximity to the Whittier, Glen Ivy, and Chino sections of the Elsinore Fault Zone. The northern branch of this fault traverses the Santa Ana Mountains approximately 300 feet south of the southern Project area property line. The main branch of this fault is located approximately 2,200 feet south of the southern Project area boundary. The Elsinore fault is a steeply dipping east-west trending fault. Although the bedrock structure in the vicinity of the GRRSP Planning Area is affected by this fault, it is not identified as an Alquist-Priolo Earthquake Fault Zone in the Planning Area vicinity. This designation is applied to portions of the fault located northwest and southeast of the Project area.

Paleontological Resources
Paleontological resources (fossils) are the remains and/or traces of prehistoric life. Fossils are typically preserved in layered sedimentary rocks and the distribution of fossils is a result of the sedimentary history of the geologic units within which they occur. Fossils occur in a noncontinuous and often unpredictable distribution within some sedimentary units, and the potential for fossils to occur within sedimentary units depends on several factors. Although it is not possible to determine whether a fossil will occur in any specific location, it is possible to evaluate the potential for geologic units to contain scientifically significant paleontological resources, and therefore evaluate the potential for impacts to those resources and provide mitigation for paleontological resources if they do occur during construction.

The existence of Quaternary (middle to early Pleistocene) very old alluvial fan sediments and three Tertiary sedimentary formations beneath the Project area, the High paleontological resource sensitivity assigned to these geologic units, and fossils recovered from within and nearby the Project area. However, no Pleistocene fossils are known from within the project.

4.7.4 EXISTING REGULATIONS, PLANS, PROGRAMS, AND POLICIES

FEDERAL REGULATIONS
Earthquake Hazards Reduction Act
The Earthquake Hazards Reduction Act was enacted in 1997 to "reduce the risks to life and property from future earthquakes in the United States through the establishment and maintenance of an effective earthquake hazards and reduction program." To accomplish this, the Act established the National Earthquake Hazards Reduction Program that provides characterization, and prediction of hazards and vulnerabilities; improvement of building codes and land use practices; risk reduction through post-earthquake investigations and education; development and improvement of design and construction techniques; improvement of mitigation capacity; and accelerated application of research results. This Act designated the

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-6
Federal Emergency Management Agency (FEMA) as the lead agency of the program and assigns it several planning, coordinating, and reporting responsibilities. Programs under this Act provide building code requirements such as emergency evacuation responsibilities and seismic code standards such as those to which development would be required to adhere.

STATE REGULATIONS
Alquist-Priolo Earthquake Fault Zoning Act
The Alquist-Priolo Earthquake Fault Zoning Act was enacted in 1972 to prohibit the location of developments and structures for human occupancy across the trace of active faults. To assist with this, the State Geologist delineates appropriately wide earthquake fault zones (AlquistPriolo Zones) to encompass potentially and recently active traces, which are submitted to city and county agencies to be incorporated into their land use planning and construction policies.

A trace is a line on the earth’s surface defining a fault, and an active fault is defined as one that has ruptured in the last 11,000 years. The minimum distance a structure for human occupancy can be placed from an active fault is generally fifty feet.

Seismic Hazard Mapping Act
The Seismic Hazards Mapping Act (SHMA) of 1990 directs the Department of Conservation, California Geological Survey to identify and map areas prone to earthquake hazards of liquefaction, earthquake- induced landslides and amplified ground shaking. The purpose of the SHMA is to reduce the threat to public safety and to minimize the loss of life and property by identifying and mitigating these seismic hazards.

The SHMA requires the State Geologist to establish regulatory zones (Zones of Required Investigation) and to issue appropriate maps (Seismic Hazard Zone Maps). These maps are distributed to all affected cities, counties, and state agencies for their use in planning and controlling construction and development.

California Building Code
The California Building Code (also known as the “California Building Standards Code”) is promulgated under the California Code of Regulations (CCR) (Title 24, Parts 1 through 12) and is administered by the California Building Standards Commission. The national model code standards adopted into Title 24 apply to all occupancies in California except for modifications adopted by State agencies and local governing bodies. The California Building Standards Commission published the 2022 California Building Code which came into effect in January 2023. The Project would comply with State requirements regarding seismic design in effect at the time building permits are issues. Cities and counties may adopt ordinances making more restrictive requirements than provided by the California Building Code, because of local climatic, geological, or topographical conditions. Such adoptions and a finding of need statement must be filed with the California Building Standards Commission.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-7
Paleontological Resources
California Public Resources Code
Paleontological sites are protected under a wide variety of state policies and regulations in the California Public Resources Code (PRC). In addition, paleontological resources are recognized as nonrenewable resources and receive protection under the PRC and CEQA. PRC Division 5, Chapter 1.7, Section 5097.5, and Division 20, Chapter 3, Section 30244 states:

No person shall knowingly and willfully excavate upon, or remove, destroy, injure or deface any historic or prehistoric ruins, burial grounds, archaeological or vertebrate paleontological site, including fossilized footprints, inscriptions made by human agency, or any other archaeological, paleontological or historical feature, situated on public lands, except with the express permission of the public agency having jurisdiction over such lands. Violation of this section is a misdemeanor. This statute prohibits the removal, without permission, of any paleontological site or feature from lands under the jurisdiction of the state or any city, county, district, authority, or public corporation, or any agency thereof. As a result, local agencies are required to comply with PRC 5097.5 for their own activities, including construction and maintenance, as well as for permit actions (e.g., encroachment permits) undertaken by others.

PRC Section 5097.5 also establishes the removal of paleontological resources as a misdemeanor, and requires reasonable mitigation of adverse impacts to paleontological resources from developments on public (state, county, city, and district) lands.

REGIONAL REGULATIONS
There are no regional regulation applicable to the Modified Project.

LOCAL REGULATIONS
City of Corona 2020–2040 General Plan
Public Safety Element
Policy PS-1.1 Maintain accurate records, information, and mapping of seismic and geologic activity and hazards in Corona and the region from the California Geologic Survey; update records with information from local geotechnical studies.

Policy PS-1.2 In areas subject to seismic and geologic hazards, require development proposals to include a geotechnical hazard analysis and specific mitigations to reduce risks to acceptable levels as a condition of approval.

Policy PS-1.3 Enforce development requirements, such as seismic study analyses, project siting, setbacks, and project design features for proposed developments near the Elsinore Fault Zone and other active faults in accordance with the Alquist-Priolo Act.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-8
Policy PS-1.4 Require adherence to the latest California Building Codes and associated regulations in the City’s Municipal Code; update local codes and development requirements periodically for the latest best practices.

Policy PS-1.5 Locate new or existing buildings in the Elsinore earthquake fault zone or in other areas at risk from liquefaction, landslides, or other seismic and geologic hazards in the community and take corrective actions to minimize the risk of loss.

Policy PS-1.6 Identify vulnerable structures and encourage the retrofit or upgrade of vulnerable buildings (e.g., mobile homes) to minimize the damage to structures and reduce the risk or injury or death from seismic or geologic events.

Policy PS-1.7 Require geotechnical analysis for projects proposed in areas subject to corrosive soils. Where found, require appropriate cathodic protections and other best practices to minimize damage to buildings, structures, and infrastructure.

Policy PS-1.8 Limit grading for developments to the minimum needed to preserve natural topography, preserve vegetation, and maintain soil and slope stability. Require appropriate grading plans and slope stability to minimize soil instability.

Environmental Resources Element
Policy HR-3.1 Require appropriate treatment/preservation of archaeological collections in a culturally appropriate manner, in accordance with state and federal standards, and in consultation with interested Native American tribes that have traditional cultural affiliation with the project area and/or the resources affected by the project.

Policy HR-3.2 Require that development proposals incorporate specific measures to identify, protect, and preserve cultural resources in the planning, environmental review, and development process.

Policy HR-3.4 Any project that involves earth-disturbing activities in an area determined to be archaeologically or culturally sensitive shall require evaluation of the site by a qualified archaeologist. The applicant shall implement the recommendations of the archaeologist, subject to the approval of the City.

Policy HR-3.6 Any project that involves earth-disturbing activities in soil or rock units known or reasonably suspected to be fossil-bearing shall require monitoring by a qualified paleontologist retained by the project applicant for the duration of excavation or trenching.

Policy HR-3.7 Paleontological resources found prior to or during construction shall be evaluated by a qualified paleontologist, and appropriate mitigation measures applied, pursuant to § 21083.2 of CEQA, before the resumption of development activities. Any measures applied shall include the preparation of a report meeting professional standards, which shall be submitted to the Riverside County Museum of Natural History.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-9
Infrastructure and Utilities Element
Policy IU-3.3 Build, upgrade, maintain, and expand existing sewer collection and treatment facilities where existing systems are deficient in accordance with the Sewer Master Plan and state and federal standards.

Policy IU-3.4 Require that new development be connected to the municipal sewer system and ensure that adequate capacity is available for the treatment of generated sewer flows and safe disposal of sludge.

Policy IU-3.6 Restrict and prioritize sewer connections, if necessary, to comply with available treatment capacity.

Policy IU-3.7 Ensure that sewer connection fees and charges are reviewed annually and are sufficient to fully fund and support the construction, improvement, and rehabilitation of sewer facilities.

Policy IU-3.8 Require that new development be connected to the City’s sewer system.

4.7.5 PROJECT DESIGN FEATURES
No Project Design Features are proposed for the Modified Project.

4.7.6 THRESHOLDS OF SIGNIFICANCE
Based on the relevant CEQA Guidelines as currently implemented by the City of Corona, significant geology and soilsimpacts would occur if the proposed Project or any Project-related component would:

Threshold GEO-1 a. Directly or indirectly cause potential substantial adverse effects, including the risk of loss, injury or death involving:
i. Rupture of a known earthquake fault, as delineated on the most Alquist-Priolo Earthquake Fault Zoning Map, issued by the State Geologist for the area or based on other substantial evidence of a known fault.

Threshold GEO-2 ii. Strong seismic ground shaking.

Threshold GEO-3 iii. Seismic-related ground failure, including liquefaction.

Threshold GEO-4 iv. Landslides.

Threshold GEO-5 Result in substantial soil erosion or the loss of topsoil.

Threshold GEO-6 Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in onor off-site landslide, lateral spreading, subsidence, liquefaction, or collapse.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-10
Threshold GEO-7 Be located on expansive soil, as defined in Table 18-I-B of the Uniform Building Code (1994), creating substantial direct or indirect risks to life or property.

Threshold GEO-8 Have soils incapable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the disposal of wastewater.

Threshold GEO-9 Directly or indirectly destroy a unique paleontological resource or site or unique geologic feature.

METHODOLOGY
The analysis of geology and soils impacts associated with the Modified Project is based on a review of the EIR-Level Geotechnical Study dated August 12, 2020 and the Update of EIRLevel Geotechnical Study dated January 31, 2024 prepared by Petra Geosciences, Inc., referred to as the Geotechnical Study for the Modified Project, and the Paleontological Resource Record Search Update for the Green River Ranch III Project, prepared by Brian F. Smith and Associates, revised January 10, 2024. The assessment presents field exploration, findings, conclusions and recommendations, and seismic design considerations based on the analysis in the Geotechnical Study. Additional resources reviewed include the City’s 2020-2040 General Plan and General Plan Technical Update Draft EIR, and the California Department of Conservation. The sections that follow describe the identified impacts and the measures that would be incorporated to mitigate significant impacts from the Modified Project.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-11

4.7.7 ENVIRONMENTAL IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Impacts
Would the
Modified
Project result
in new or
more severe
impacts
requiring
revisions to
the Prior
EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions
to the Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the
Modified Project
requiring
revisions to the
Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

GEO-1 a. Directly or indirectly
cause potential
substantial adverse
effects, including the risk
of loss, injury or death
involving:
i. Rupture of a known
earthquake fault, as
delineated on the most
Alquist-Priolo
Earthquake Fault Zoning
Map, issued by the State
Geologist for the area or
based on other
substantial evidence of a
known fault.

GEO-2 ii. Strong seismic ground
shaking.

GEO-3 iii. Seismic-related
ground failure, including
liquefaction.

GEO-4 iv. Landslides.

GEO-5 Result in substantial soil
erosion or the loss of
topsoil.

GEO-6 Be located on a geologic
unit or soil that is
unstable, or that would
become unstable as a
result of the project, and
potentially result in on- or
off-site landslide, lateral
spreading, subsidence,
liquefaction, or collapse.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-12
Impacts
Would the
Modified
Project result
in new or
more severe
impacts
requiring
revisions to
the Prior
EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions
to the Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the
Modified Project
requiring
revisions to the
Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

GEO-7 Be located on expansive
soil, as defined in Table
18-I-B of the Uniform
Building Code (1994),
creating substantial direct
or indirect risks to life or
property.

GEO-8 Have soils incapable of
adequately supporting the
use of septic tanks or
alternative wastewater
disposal systems where
sewers are not available
for the disposal of
wastewater.

GEO-9 Directly or indirectly
destroy a unique
paleontological resource
or site or unique geologic
feature.

IMPACTS ASSOCIATED WITH THE MODIFIED PROJECT
Impact GEO-1: a. Directly or indirectly cause potential substantial adverse effects, including the risk of loss, injury or death involving:
i. Rupture of a known earthquake fault, as delineated on the most Alquist-Priolo Earthquake Fault Zoning Map, issued by the State Geologist for the area or based on other substantial evidence of a known fault.

Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As stated previously, the GRRSP Planning Area is not within a State of California defined Alquist-Priolo Earthquake Fault Hazard Zone and no known active faults transect the Project site. As determined in the Geotechnical Study (Appendix G-1), no known surface traces of active or potentially active faults traverse any portion of the Modified Project site and field

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-13
observations did not reveal evidence of ground rupturing faulting at the surface. Therefore, the potential for substantial adverse effects due to surface rupture along a known earthquake fault is less than significant and no mitigation is required. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact GEO-2: ii. Strong seismic ground shaking.

Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The GRRSP Planning Area is located in a seismically active area of southern California. The type and magnitude of seismic hazards that may affect the Modified Project site are dependent on both the distance to causative faults and the intensity and duration of the seismic event.

Although surface rupture is considered less than significant, the Modified Project could be subject to future seismic shaking and strong ground motion resulting in structural damage.

Future construction of the Modified Project and the construction of the proposed BPI Development and future construction of the balance of the Modified Project would be subject to applicable ordinances and requirements of the current California Building Code (CCR Title 24). The CBC provides requirements for foundation strength, tie-downs, shear strength, and other building requirements designed to withstand significant ground-shaking. Similar to the Approved Project, with implementation of design and construction techniques tailored to withstand ground shaking to an acceptable level defined by the CBC, potential impacts to the proposed BPI Development and balance of the Modified Project would be reduced to less than significant. Mitigation Measure 4.10.1A was identified in the 2001 EIR for the Approved Project to require adherence to obligatory design and construction techniques related to mitigating the affects from ground shaking. However, such mitigation is not necessary because the requirements are obligatory. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact GEO-3: iii. Seismic-related ground failure, including liquefaction.

Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-14
The secondary effects of seismic activity that are typically considered as potential hazards to a particular site include several types of ground failure. The general types of ground failure that can occur as a consequence of severe ground shaking include liquefaction. The probability of occurrence of each type of ground failure depends on the severity of the earthquake, distance from the causative fault, topography, soil, and groundwater conditions and other factors.

Liquefaction occurs when dynamic loading of a saturated sand or silt causes pore-water pressures to increase to levels where grain-to-grain contact is lost or significantly reduced and material temporarily behaves as a viscous fluid. Typically, these conditions must be present within 30 to 35 feet of the ground surface. Liquefaction can cause settlement of the ground surface, settlement and tilting of engineered structures, flotation of buoyant buried structures and fissuring of the ground surface. A common surface manifestation of liquefaction is the formation of sand boils.

As stated in the Geotechnical Study, only dry-sand settlement appears to be a potential concern with respect to development of the Modified Project including proposed BPI development project. However, as stated in the 2001 EIR and consistent with the findings in the current Geotechnical Study, liquefaction beneath the Modified Project site is considered unlikely because groundwater was not encountered in the exploratory borings completed to a maximum depth of 87 feet below grade. As a result, the potential for the occurrence of liquefaction beneath the GRRSP Planning Area with impact to the development is considered less than significant.

In addition, the effects of seismic-related ground failure would be further mitigated through remedial grading, and the incorporation of strengthened foundation systems (i.e. mat or posttensioned) into the project design which are obligatory requirements of State and local laws and ordinances, including Chapter 18 of the CBC as the City has adopted in its Municipal Code. These requirements include implementation of specific recommendations for remedial grading and foundation design determined in the design-phase geotechnical report. Remedial grading would include excavation and recompaction of near-surface soils to increase the relative density of the surficial dry sandy soils. Therefore, impacts are considered to be less than significant with implementation of existing regulations and no mitigation is required.

Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact GEO-4: iv. Landslides.

Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-15
Landslides or large unstable slopes can result in soil movement downslope that damages property or results in injury to persons located downslope. The potential for such soil movements can be evaluated to determine the presence of weak soil or rock layers, or unstable materials that may contribute to the occurrence of landslides..

Cut slopes up to approximately 180 feet in height have been proposed to facilitate building pad construction of the BPI Development. As stated in the Geotechnical Study, it is anticipated that the upper portion of these slopes will consist of very old alluvial fan deposits, while the lower portions and the toe of these slopes are likely to expose bedrock. As such, the proposed slope configurations are likely to be stable with adequate factors of safety under static conditions.

As discussed previously, the BPI Development site is very close to active faulting associated with the Elsinore fault and therefore seismic shaking potential at the BPI Development site is very high as previously analyzed.

Preliminary results from the Geotechnical Study indicated that typical 2:1 slopes of 180 feet in height may not achieve adequate factors of safety. The Geotechnical Study identified one landslide surface within the southwesterly cut slope of the BPI Development; however, it will be removed during designed grading of the cut slope. Implementation of specific recommendations for remedial grading determined in the design-phase geotechnical report will include detailed evaluation of the slope stability and any landslides at the site for determination of appropriate design measures. The design-phase geotechnical report will include a pseudostatic analysis which takes into account the potential ground shaking at the site. The stability analysis will ensure an adequate factor of safety will be constructed at the slope, including modifications to the design if needed such as a further laid back or further stabilized such that the potential for seismically induced slope failure will be less than significant. With implementation of these obligatory requirements included in the BPI Development Project’s design, impacts associated with slope stability and from a future landslide would be reduced to less than significant levels.

Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact GEO-5: Result in substantial soil erosion or the loss of topsoil.

Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As previously discussed, construction of the Modified Project would include the grading of slopes of moderate to significant height within the Modified Project site as it pertains to the proposed BPI Development. Potential runoff from precipitation or uncontrolled irrigation,

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-16
erosion of graded areas could occur during construction of all portions of the Modified Project that would result in offsite transport of the non-cohesive surface soils.

Reduction of the erosion potential during construction activities can be accomplished through a Storm Water Pollution Prevention Plan (SWPPP), which specifies best management practices (BMPs) for temporary erosion controls. As part of the SWPPP, standard erosion control measures would be implemented for development of each phase of development of the Modified Project including the BPI Development to minimize the risk of erosion or sedimentation during construction. The SWPPP requires the inclusion of an erosion control plan that prescribes measures such as phasing grading, limiting areas of disturbance, designating restricted-entry zones, diverting runoff from disturbed areas, protective measures for sensitive areas, outlet protection, and provisions for revegetation or mulching. The erosion control plan(required under Section 15.36.060, Erosion Control Plan, of the City’s Municipal Code) would also include treatment measures to trap sediment, including inlet protection, straw bale barriers, straw mulching, straw wattles, silt fencing, check dams, terracing, and siltation or sediment ponds.

Such standards include proper implementation of storm water BMPs (as mandated by the City’s water quality ordinance) prior to commencement of earthwork operations within the Modified Project site including the BPI development, as well as diligent maintenance of erosion control devices throughout the early phases of construction until such time as the permanent storm water conveyance system has been constructed and activated. During the post-construction and occupancy period, the potential for soil erosion and loss of topsoil would remain less than significant through proper maintenance of irrigation systems and permanent storm water conveyance devices, as well as though compliance with the City’s water quality ordinance.

The 2001 EIR concluded construction of the Approved Project would create the potential for alluvium slope raveling and slope instability causing potential erosion impacts. With implementation of specific design recommendations from the Approved Project’s geotechnical study as detailed in mitigation measures MM 4.10.3A through MM 4.10.3E identified in the 2001 EIR, potential impacts related to slope stability would be reduced to less than significant.

However, it can be assumed implementation of standard obligatory regulations would reduce impacts from soil erosion and loss of topsoil associated with development of each phase of the Modified Project’s development to less than significant.

Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-17
Impact GEO-6: Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the project, and potentially result in on- or off-site landslide, lateral spreading, subsidence, liquefaction, or collapse.

Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

Based on testing and a review of the borings and laboratory testing provided in the Geotechnical Study, existing soils within the low-lying/northerly portion of the BPI Development site are considered unsuitable. As a result, these soils are unsuitable for development and should be removed to underlying competent alluvial fan soils and replaced as properly compacted fill. Localized areas of deeper excavation of unsuitable soils may be necessary, and should be anticipated. Removal of soils in the natural canyon areas that extend southward into the hilly portion of the Modified Project site will likely be required down to bedrock. As such, the unsuitable soils and the recommendations detailed in the Geotechnical Study, over excavation and remediation of soils is required to render impacts to below a level less than significant.

In order to provide suitable support for the proposed BPI Development and similar conditions for future development of the GRRSP Planning Area, existing compressible materials should be over-excavated and the excavated material replaced as properly compacted, engineered fill.

As stated in the Geotechnical Study, the depth of required over-excavation will vary below existing grades and actual remedial grading depths will need to be determined during supplemental investigations and during grading based on on-site field observations by the Project geotechnical consultant. Detailed recommendations for remedial and design grading should be provided in the comprehensive design-phase geotechnical report. Additionally, the remedial recommendations should consider the need to protect any adjacent offsite properties and other restrictions that may be imposed by property limit boundaries.

Remedial and design grading within the Modified Project site including the BPI Development site would be performed in accordance with local grading ordinances, current standards of practice in the area, and the site-specific recommendations to be provided by the Project geotechnical professional. Based on the preceding findings, it is expected that excessive settlement resulting from compression and/collapse of existing near surface soils will be reduced to a less than significant level with implementation of the detailed recommendations contained in the design-phase geotechnical report, during supplemental investigations, and during grading based on on-site field observations by the Project geotechnical consultant.

Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-18
Mitigation Measure
No mitigation measures are required.

Impact GEO-7: Be located on expansive soil, as defined in Table 18-I-B of the Uniform Building Code (1994), creating substantial direct or indirect risks to life or property.

Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

Expansive soils are types of soil that expand or contract when they absorb or lose moisture.

This can cause problems for buildings with concrete surfaces or rigid floors, like cracking or shifting. As stated in the Geological Study (Appendix G-1), laboratory testing determined nearsurface soil and bedrock is anticipated to generally have a very low expansion potential.

Similar to the conclusions in the 2001 EIR, the Geotechnical Study indicated clayey alluvial materials located in the northern portion of the proposed BPI Development have a higher expansion potential. The CBC, Section 1808.6, as adopted by the City, contains provisions for design of building foundations and floor slabs to address the potential detrimental effects of expansive soils.

As mentioned in the Geotechnical Study, construction at the Modified Project will include mass grading and mixing of the various materials that are currently beneath the site. As stated in the 2001 ERI, properly compacted-engineered fill would be considered adequate in strength and consolidation characteristics to support the future structures constructed as part of the Approved Project without detrimental settlement. After completion of grading, the Geotechnical Study determined any identified near-surface soils within building pad areas exhibit an elevated expansion potential, those expansive soils would be addressed through design of structural foundations and floor slabs in compliance with the provisions of Section 1808.6 of the CBC, as adopted by the City Development Code, to prevent structural damage to the structures. With implementation of these obligatory procedures, impacts from expansive soils would be less than significant and no further mitigation is required.

Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact GEO-8: Have soils incapable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the disposal of wastewater.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-19
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As discussed in Section 4.19, Utilities and Service Systems, sewer services within the GRRSP Planning Area and BPI Development area would be provided by the City of Corona Water Utilities Department. No septic tanks or alternative wastewater disposal systems are proposed as part of the Modified Project. Soils would not be required to support septic tanks once the project is implemented. As a result, there would be no impact and no mitigation is required.

No new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact GEO-9: Directly or indirectly destroy a unique paleontological resource or site or unique geologic feature.

Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The Geotechnical Study identified the existence of very old alluvial fan sediments and sedimentary formations beneath the Modified Project that are considered to possess high paleontological resource sensitivity. Consequently, ground breaking activities during Project construction are considered to have a potential for impact to paleontological resources and therefore mitigation is required. Full-time paleontological monitoring shall be required in undisturbed fossil-bearing formations starting at the surface during surficial grading, excavation, or utility trenching activities associated with site preparation. This same conclusion was reached by the earlier investigations contained in the 2001 EIR for the Approved Project.

For this reason, the Geotechnical Study recommended a draft PRIMP that would compliment the PRIMP contained in MM 4.9.1A of the prior 2001 EIR for the Approved Project. The revised and updated PRIMP would be comparable to the Approved Project’s mitigation, consistent with the provisions of CEQA, the City’s GP policies regarding paleontological resources, and the guidelines of the Society of Vertebrate Paleontology. Upon implementation, the revised and updated PRIMP in combination with the recommendations contained in the 2001 EIR Mitigation Measure 4.9.1A would mitigate any adverse impacts (loss or destruction) to potential nonrenewable paleontological fossil resources, if present, to less than significant.

The updated and revise PRIMP acknowledges that paleontological monitoring may be reduced or halted if the excavations are unlikely to yield paleontological resources based upon the observations and recommendations of the professional-level project paleontologist.

Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-20
with implementation of 2001 EIR MM 4.9.1.A plus revised and updated Mitigation Measure MM PAL-1.

Mitigation Measure
In addition to 2001 EIR MM 4.9.1.A, the Modified Project introduces Mitigation Measure MM PAL-1 that would reduce project-related impacts to levels that are less than significant.

4.7.8 CUMULATIVE IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Future development within the Modified Project vicinity would result in the potential for loss of paleontological resources. However, each development project is required to implement appropriate mitigation during earth moving activities in the same manner as identified for the Modified Project (prior EIR MM 4.9.1.4 and new MM PAL-1). For this reason, cumulative impacts to paleontological resources would be reduced to below a level of significance in the same manner as concluded in the 2001 EIR. Pursuant to local paleontological protection measures contained in the County of Riverside’s and City’s GPs, and the provisions of CEQA, impacts to paleontological resources from projects within the cumulative impact area that require discretionary action by a public agency would be assessed. Similar to the conclusion reached in the prior EIR, it is reasonable to assume appropriate mitigation would be required for all cumulative projects and impacts would be reduced to less than significant on a project and cumulative level. Therefore, no new or substantially greater cumulative impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

4.7.9 MITIGATION MEASURES IDENTIFIED IN PRIOR EIR APPLICABLE TO

MODIFIED PROJECT
No prior 2001 EIR mitigation measures are applicable as they are 1) superseded by the obligatory requirements of the CBC; or 2) the new Geotechnical Study (Appendix G-1 and G2) current design and construction recommendations.

4.7.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT The Modified Project introduces the following Mitigation Measures and are further described in detail below.

MM PAL-1: 1) Monitoring of mass grading and excavation activities in areas identified as likely to contain paleontological resources by a qualified paleontologist or paleontological monitor. Full time monitoring of grading or excavation activities should be performed starting from the surface in undisturbed areas of very old Quaternary (middle to early Pleistocene) alluvial fan deposits, and the Tertiary-aged Sespe, Vaqueros, Santiago, and Silverado formations within the

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GEOLOGY AND SOILS

ENPLANNERS

4.7-21
project. Paleontological monitors will be equipped to salvage fossils as they are unearthed to avoid construction delays and to remove samples of sediments that are likely to contain the remains of small fossil invertebrates and vertebrates.

The monitor must be empowered to temporarily halt or divert equipment to allow for the removal of abundant or large specimens in a timely manner.

Monitoring may be reduced if the potentially fossiliferous units are not present in the subsurface, or if present, are determined upon exposure and examination by qualified paleontological personnel to have a low potential to contain or yield fossil resources.
2) Paleontological salvage during trenching and boring activities is typically from the generated spoils and does not delay the trenching or drilling activities.

Fossils are collected and placed in cardboard flats or plastic buckets and identified by field number, collector, and date collected. Notes are taken on the map location and stratigraphy of the site, and the site is photographed before it is vacated and the fossils are removed to a safe place. On mass grading projects, any discovered fossil site is protected by red flagging to prevent it from being overrun by earthmovers (scrapers) before salvage begins. Fossils are collected in a similar manner, with notes and photographs being taken before removing the fossils. Precise location of the site is determined with the use of handheld Global Positioning System units. If the site involves a large terrestrial vertebrate, such as large bone(s) or a mammoth tusk, that is/are too large to be easily removed by a single monitor, Brian F. Smith and Associates, Inc. (BFSA) will send a fossil recovery crew in to excavate around the find, encase the find within a plaster jacket, and remove it after the plaster is set. For large fossils, use of the contractor’s construction equipment is solicited to help remove the jacket to a safe location before it is returned to the BFSA laboratory facility for preparation.
3) Particularly small invertebrate fossils typically represent multiple specimens of a limited number of organisms, and a scientifically suitable sample can be obtained from one to several five-gallon buckets of fossiliferous sediment. If it is possible to dry screen the sediment in the field, a concentrated sample may consist of one or two buckets of material. For vertebrate fossils, the test is usually the observed presence of small pieces of bones within the sediments. If present, as many as 20 to 40 five-gallon buckets of sediment can be collected and returned to a separate facility to wet-screen the sediment. In the laboratory, individual fossils are cleaned of extraneous matrix, any breaks are repaired, and the specimen, if needed, is stabilized by soaking in an archivally approved acrylic hardener (e.g., a solution of acetone and Paraloid B-72).

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GEOLOGY AND SOILS

ENPLANNERS

4.7-22
4) Preparation of recovered specimens to a point of identification and permanent preservation, including screen washing sediments to recover small invertebrates and vertebrates, if necessary. Preparation of individual vertebrate fossils is often more time-consuming than for accumulations of invertebrate fossils.
5) Identification and curation of specimens into a professional, accredited public museum repository with a commitment to archival conservation and permanent retrievable storage (e.g., the Western Science Center, 2345 Searl Parkway, Hemet, California 92543). The paleontological program should include a written repository agreement prior to the initiation of mitigation activities.
6) Preparation of a final monitoring and mitigation report of findings and significance, including lists of all fossils recovered and necessary maps and graphics to accurately record their original location. The report, when submitted to the appropriate lead agency (City of Corona), will signify satisfactory completion of the project program to mitigate impacts to any paleontological resources.
7) Decisions regarding the intensity of the MMRP will be made by the project paleontologist based upon the significance of the potential paleontological resources and their biostratigraphic, biochronologic, paleoecologic, taphonomic, and taxonomic attributes, not upon the ability of a project proponent to fund the MMRP.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-1

4.8 GREENHOUSE GAS EMISSIONS

4.8.1 INTRODUCTION
This section provides a summary of applicable impacts and mitigation measures from the 2001 EIR, an overview of existing Greenhouse Gas (GHG) conditions within the GRRSP Planning Area and surrounding region, a summary of applicable regulations, and analyses of potential changes in impacts from GHG emissions from implementation of the Modified Project in comparison to the Approved Project. The NOP comment letters from South Coast Air Quality Management District, Southern California Association of Governments, and California Allied for a Responsible Economy were received pertaining to this topic. No Scoping Meeting comments were received pertaining to this topic.

This section of the Draft SEIR is based in part on the Green River Ranch Specific Plan Amendment, SP00-001 Amendment No.1, Greenhouse Gas Analysis (GHG Analysis), prepared by Urban Crossroads dated June 12, 2024 (Appendix I) .

4.8.2 SUMMARY OF IMPACTS AND MITIGATION MEASURES FROM THE 2001 EIR
The 2001 EIR did not include analysis of GHG emissions.

4.8.3 ENVIRONMENTAL SETTING
GHGs are any gas that absorbs infrared radiation in the atmosphere. This absorption traps heat within the atmosphere, altering the Earth’s surface temperature. Increased surface temperatures caused by increased absorption of the sun’s infrared radiation from GHGs is commonly referred to as the greenhouse gas effect. A majority of the scientific community believes GHG emissions resulting from human activities have caused increased levels of most naturally occurring GHGs measured in the atmosphere over the past several decades. Regardless of the cause, the majority of the scientific community believes the continued increase of these GHG levels will result in an increase in the temperature of the Earth’s lower atmosphere. This increase in atmospheric temperature from increased GHGs is a phenomenon commonly referred to as global warming. Warming of the Earth’s lower atmosphere induces a suite of additional changes, including changes in global precipitation patterns; ocean circulation, temperature, and acidity; global mean sea level; species distribution and diversity; and the timing of biological processes. These large-scale changes are collectively referred to as global climate change. The GHGs listed by the Intergovernmental Panel on Climate Change (IPCC) include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), fluoroform (HFC-23), tetrafluoroethane (HFC-134a), difluoroethane (HFC-152a), and sulfur hexaflouride (SF6) (IPCC 2022).

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-2
The Global Warming Potential (GWP) was developed to simplify quantification, reporting, analysis, and comparison of the global warming impacts of different GHGs. IPCC defines the GWP of various GHG emissions on a normalized scale that recasts all GHG emissions in terms of CO2 equivalents (CO2e). The GWP of CO2 is, by definition, 1. GHG emissions are quantified and presented in terms of metric tons (MT) of CO2e emitted per year.

4.8.4 EXISTING REGULATIONS, PLANS, PROGRAMS, AND POLICIES

FEDERAL REGULATIONS
Executive Order 13990
On January 20, 2021, federal agencies were directed to immediately review and take action to address federal regulations promulgated and other actions taken during the prior 4 years that conflict with: national objectives to improve public health and the environment; ensure access to clean air and water; limit exposure to dangerous chemicals and pesticides; hold polluters accountable, including those who disproportionately harm communities of color and lowincome communities; reduce GHG emissions; bolster resilience to the impacts of climate change; restore and expand our national treasures and monuments; and prioritize both environmental justice and employment.

STATE REGULATIONS
AB 1493 - Pavley Fuel Efficiency Standards
In 2002, the California Legislature adopted AB 1493 requiring the adoption of regulations to reduce GHG emissions in the transportation sector. In September 2004, pursuant to AB 1493, the California Air Resources Board (CARB) approved regulations to reduce GHG emissions from new motor vehicles beginning with the 2009 model year (Pavley Regulations). In September 2009, CARB adopted amendments to the Pavley Regulations to reduce GHG from 2009 to 2016. CARB, EPA, and the U.S. Department of Transportation’s National Highway Traffic and Safety Administration (NHTSA) have coordinated efforts to develop fuel economy and GHG standards for model 2017-2025 vehicles. The GHG standards are incorporated into the “Low Emission Vehicle” (LEV) Regulations.

Executive Order S-3-05
California Governor Arnold Schwarzenegger announced on June 1, 2005, through Executive Order S-3-05, the following reduction targets for GHG emissions:
• By 2010, reduce GHG emissions to 2000 levels.
• By 2020, reduce GHG emissions to 1990 levels.
• By 2050, reduce GHG emissions to 80% below 1990 levels.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-3
The 2050 reduction goal represents what some scientists believe is necessary to reach levels that would stabilize the climate. The 2020 goal was established to be a mid-term target.

Because this is an executive order, the goals are not legally enforceable for local governments or the private sector.

Assembly Bill (AB) 1279
Assembly Bill (AB) 1279 requires the state to achieve net zero greenhouse gas emissions (GHG) as soon as possible, but no later than 2045, and achieve and maintain net negative greenhouse gas emissions thereafter. The bill also requires California to reduce statewide GHG emissions by 85 percent compared to 1990 levels and directs the California Air Resources Board to work with relevant state agencies to achieve these goals.

AB 32 Global Warming Solutions Act of 2006
The California State Legislature enacted AB 32, the Global Warming Solutions Act, in 2006 requiring GHGs emitted in California be reduced to 1990 levels by the year 2020 (this goal has been met). GHGs as defined under AB 32 include CO2, CH4, N2O, HFCs, PFCs, and SF6. Since AB 32 was enacted, a seventh chemical, NF3, has also been added to the list of GHGs. CARB is the state agency charged with monitoring and regulating sources of GHGs. Pursuant to AB 32, CARB adopted regulations to achieve the maximum technologically feasible and costeffective GHG emission reductions. AB 32 states the following:
“Global warming poses a serious threat to the economic well-being, public health, natural resources, and the environment of California. The potential adverse impacts of global warming include the exacerbation of air quality problems, a reduction in the quality and supply of water to the state from the Sierra snowpack, a rise in sea levels resulting in the displacement of thousands of coastal businesses and residences, damage to marine ecosystems and the natural environment, and an increase in the incidences of infectious diseases, asthma, and other human health-related problems.”
2022 Scoping Plan
The California Global Warming Solutions Act of 2006 (AB 32) requires that CARB develop and update every five years a scoping plan that sets forth the approach California will take to reduce statewide GHG emissions. The fourth Scoping Plan was approved by CARB in December 2022. The 2022 Scoping Plan focuses on turning California into a clean energy economy overall, with regulations that touch on numerous industries. The plan would cut GHG emissions by 48% below 1990 levels by 2030, an increase from the current 40% statutory mandate. By 2045, the plan would cut emissions by a dramatic 85% below 1990 levels and attain carbon neutrality. The plan would result in a 71% reduction in smog-forming air pollution, reduce fossil fuel consumption to less than one-tenth of what California uses presently, create 4 million new jobs in the energy sector, and save Californians $200 billion in health costs due to pollution in 2045.As part of the plan, CARB would seek to reduce liquid

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-4
petroleum fuel consumption by 94% and total fossil fuel demand by 86% by 2030. The most ambitious of these new measures includes a prohibition on building new fossil gas plants or expanding on current plants in the state. Instead, energy development would be focused on renewable resources. For the electricity generation sector at large, CARB’s plan includes lowering sector GHG emissions to 38 million metric tons (MMT) in 2030 and 30 MMT in 2035.

CARB’s plan calls for installing point source capture technology on petroleum refineries, cement production facilities, and electricity-generating gas plants where there is currently no feasible alternative to combustion energy. These technological capture methods are intended to be implemented in addition to increased focus on carbon capture via natural means, such as the preservation of natural lands by planting trees and restoring wetlands.

The plan incorporates newly passed measures that ban the sale of gasoline-only cars by 2035.

The plan calls for at least 35% of new vehicles sold to be zero emission by 2026, a threshold which gradually increases each year to meet the 100% goal. Other transportation modes will be targeted including aviation fuels, mass transit transportation emissions (buses and light rail), and freight and passenger locomotive sales.

The plan will reduce impacts from residential and commercial buildings. New residential will require all electric appliances by 2026. For existing homes, 80% of new appliance sales must be electric by 2030 and 100% by 2045. For new commercial buildings, all appliances must be electric by 2029. Existing commercial buildings, 80% of new appliance sales must be electric by 2030 and 100% by 2045.

AB 1881
The Water Conservation in Landscaping Act of 2006 requires local agencies to adopt the updated DWR model ordinance or equivalent. AB 1881 also requires the CEC to consult with the DWR to adopt, by regulation, performance standards and labeling requirements for landscape irrigation equipment, including irrigation controllers, moisture sensors, emission devices, and valves to reduce the wasteful, uneconomic, inefficient, or unnecessary consumption of energy or water.

Senate Bill (SB) 1368. California SB 1368 adds Sections 8340 and 8341 to the Public Utilities Code (effective January 1, 2007) with the intent “to prevent long-term investments in power plants with GHG emissions in excess of those produced by a combined-cycle natural gas power plant” with the aim of “reducing emissions of GHGs from the state’s electricity consumption, not just the state’s electricity production.” SB 1368 provides a mechanism for reducing the GHG emissions of electricity providers, both in-state and out-of-state, thereby assisting CARB in meeting its mandate under AB 32, the Global Warming Solutions Act of 2006.

SB 375

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-5
In August 2008, the Legislature passed, and on September 30, 2008, Governor Schwarzenegger signed SB 375, which addresses GHG emissions associated with the transportation sector through regional transportation and sustainability plans. Regional GHG reduction targets for the automobile and light-truck sector for 2020 and 2035, as determined by CARB, are required to consider the emission reductions associated with vehicle emission standards (see SB 1493), the composition of fuels (see Executive Order S-1-07), and other CARB-approved measures to reduce GHG emissions. Regional metropolitan planning organizations (MPOs) will be responsible for preparing a Sustainable Communities Strategy (SCS) within their Regional Transportation Plan (RTP). The goal of the SCS is to establish a development plan for the region, which, after considering transportation measures and policies, will achieve, if feasible, the GHG reduction targets. If an SCS is unable to achieve the GHG reduction target, an MPO must prepare an Alternative Planning Strategy demonstrating how the GHG reduction target would be achieved through alternative development patterns, infrastructure, or additional transportation measures or policies. SB 375 provides incentives for streamlining CEQA requirements by substantially reducing the requirements for “transit priority projects,” as specified in SB 375, and eliminating the analysis of the impacts of certain residential projects on global warming and the growth-inducing impacts of those projects when the projects are consistent with the SCS or Alternative Planning Strategy. On September 23, 2010, CARB adopted the SB 375 targets for the regional MPOs.

Clean Energy and Pollution Reduction Act of 2015 (Sb 350) In October 2015, the legislature approved, and Governor Jerry Brown signed SB 350, which reaffirms California’s commitment to reducing its GHG emissions and addressing climate change. Key provisions include an increase in the RPS, higher energy efficiency requirements for buildings, initial strategies towards a regional electricity grid, and improved infrastructure for EV charging stations. Provisions for a 50% reduction in the use of petroleum statewide were removed from the Bill because of opposition and concern that it would prevent the Bill’s passage. Specifically, SB 350 requires the following to reduce statewide GHG emissions:
• Increase the amount of electricity procured from renewable energy sources from 33% to 50% by 2030, with interim targets of 40% by 2024, and 25% by 2027. • Double the energy efficiency in existing buildings by 2030. This target would be achieved through the California Public Utilities Commission (CPUC), the California Energy Commission (CEC), and local publicly owned utilities. • Reorganize the Independent System Operator (ISO) to develop more regional electrify transmission markets and to improve accessibility in these markets, which would facilitate the growth of renewable energy markets in the western United States.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-6
SB 32 (Chapter 249, Statutes of 2016)
On September 8, 2016, Governor Brown signed SB 32 and its companion bill, AB 197. SB 32 requires the state to reduce statewide GHG emissions to 40% below 1990 levels by 2030, a reduction target that was first introduced in Executive Order B-30-15. The new legislation builds upon the AB 32 goal and provides an intermediate goal to achieving S-3-05, which sets a statewide GHG reduction target of 80% below 1990 levels by 2050. AB 197 creates a legislative committee to oversee regulators to ensure that CARB not only responds to the Governor, but also the Legislature.

Cap-and-Trade Program
According to CARB, a cap-and-trade program will help put California on the path to meet its goal of reducing GHG emissions to 1990 levels by the year 2020 and ultimately achieving an 80% reduction from 1990 levels by 2050. Under cap-and-trade, an overall limit on GHG emissions from capped sectors is established, and facilities subject to the cap will be able to trade permits to emit GHGs within the overall limit.

CARB adopted a California Cap-and-Trade Program pursuant to its authority under AB 32.

See Title 17 of the CCR §§ 95800 to 96023). The Cap-and-Trade Program is designed to reduce GHG emissions from major sources (deemed “covered entities”) by setting a firm cap on statewide GHG emissions and employing market mechanisms to achieve AB 32’s emissionreduction mandate of returning to 1990 levels of emissions by 2020. The statewide cap for GHG emissions from the capped sectors (e.g., electricity generation, petroleum refining, and cement production) commenced in 2013 and will decline over time, achieving GHG emission reductions throughout the program’s duration.

California Regulations and Building Codes
California has a long history of adopting regulations to improve energy efficiency in new and remodeled buildings. These regulations have kept California’s energy consumption relatively flat even with rapid population growth.

Title 20 CCR Sections 1601 Et Seq. – Appliance Efficiency Regulations. The Appliance Efficiency Regulations regulate the sale of appliances in California. The Appliance Efficiency Regulations include standards for both federally regulated appliances and nonfederally regulated appliances. 23 categories of appliances are included in th-e scope of these regulations. The standards within these regulations apply to appliances that are sold or offered for sale in California, except those sold wholesale in California for final retail sale outside the state Green River Ranch Specific Plan Amendment and those designed and sold exclusively for use in recreational vehicles (RV) or other mobile equipment (CEC 2012).

Title 24 Ccr Part 6 – California Energy Code. The California Energy Code was first adopted in 1978 in response to a legislative mandate to reduce California’s energy consumption. The

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-7
standards are updated periodically to allow consideration and possible incorporation of new energy efficient technologies and methods.

Title 24 Ccr Part 11 – California Green Building Standards Code. California Code of Regulations (CCR) Title 24 Part 6: The California Energy Code was first adopted in 1978 in response to a legislative mandate to reduce California’s energy consumption. The standards are updated periodically to allow consideration and possible incorporation of new energy efficient technologies and methods. CCR, Title 24, Part 11: California Green Building Standards Code (CALGreen) is a comprehensive and uniform regulatory code for all residential, commercial, and school buildings that went in effect on January 1, 2009, and is administered by the California Building Standards Commission. CALGreen is updated on a regular basis, with the most recent approved update consisting of the 2022 California Green Building Code Standards that became effective on January 1, 2023.

Local jurisdictions are permitted to adopt more stringent requirements, as state law provides methods for local enhancements. CALGreen recognizes that many jurisdictions have developed existing construction waste and demolition ordinances and defers to them as the ruling guidance provided, they establish a minimum 65% diversion requirement.

The code also provides exemptions for areas not served by construction waste and demolition recycling infrastructure. The State Building Code provides the minimum standard that buildings must meet in order to be certified for occupancy, which is generally enforced by the local building official.

Energy efficient buildings require less electricity; therefore, increased energy efficiency reduces fossil fuel consumption and decreases greenhouse gas (GHG) emissions. The 2022 version of Title 24 was adopted by the CEC and became effective on January 1, 2023.

The 2022 Title 24 standards would result in less energy use, thereby reducing air pollutant emissions associated with energy consumption in the SCAB and across the State of California.

For example, the 2022 Title 24 standards require solar photovoltaic systems for new homes, encourage the use of heat pumps for space and water heating, and require homes to be electricready to ease the adoption of cleaner electric heating, cooking, and EV charging. The CEC anticipates that the 2022 energy code will provide $1.5 billion in consumer benefits and reduce GHG emissions by 10 million metric tons (40). The Project would be required to comply with the applicable standards in place at the time building permit document submittals are made.

Model Water Efficient Landscape Ordinance
The Model Water Efficient Landscape Ordinance (MWELO) was required by AB 1881, the Water Conservation Act. The bill required local agencies to adopt a local landscape ordinance at least as effective in conserving water as the Model Ordinance by January 1, 2010.

Reductions in water use of 20% consistent with (SBX-7-7) 2020 mandate are expected upon

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-8
compliance with the ordinance. Governor Brown’s Drought Executive Order of April 1, 2015 (Executive Order B-29-15) directed the Department of Water Resources (DWR) to update the Ordinance through expedited regulation. The California Water Commission approved the revised Ordinance on July 15, 2015 effective December 15, 2015. New development projects that include landscape areas of 500 sf or more are subject to the Ordinance. The update requires:
• More efficient irrigation systems;
• Incentives for graywater usage;
• Improvements in on-site stormwater capture;
• Limiting the portion of landscapes that can be planted with high water use plants; and
• Reporting requirements for local agencies.

CARB Refrigerant Management Program
CARB adopted a regulation in 2009 to reduce refrigerant GHG emissions from stationary sources through refrigerant leak detection and monitoring, leak repair, system retirement and retrofitting, reporting and recordkeeping, and proper refrigerant cylinder use, sale, and disposal. The regulation is set forth in sections 95380 to 95398 of Title 17, CCR. The rules implementing the regulation establish a limit on statewide GHG emissions from stationary facilities with refrigeration systems with more than 50 pounds of a high GWP refrigerant. The refrigerant management program is designed to (1) reduce emissions of high-GWP GHG refrigerants from leaky stationary, non-residential refrigeration equipment; (2) reduce emissions from the installation and servicing of refrigeration and air-conditioning appliances using high-GWP refrigerants; and (3) verify GHG emission reductions.

Tractor‐Trailer GHG Regulation
The tractors and trailers subject to this regulation must either use EPA SmartWay certified tractors and trailers or retrofit their existing fleet with SmartWay verified technologies. The regulation applies primarily to owners of 53‐foot or longer box‐type trailers, including both dryvan and refrigerated‐van trailers, and owners of the heavy-duty tractors that pull them on California highways. These owners are responsible for replacing or retrofitting their affected vehicles with compliant aerodynamic technologies and low rolling resistance tires. Sleeper cab tractors model year 2011 and later must be SmartWay certified. All other tractors must use SmartWay verified low rolling resistance tires. There are also requirements for trailers to have low rolling resistance tires and aerodynamic devices.

Phase I and 2 Heavy-Duty Vehicle GHG Standards
CARB has adopted a new regulation for GHG emissions from HDTs and engines sold in California. It establishes GHG emission limits on truck and engine manufacturers and harmonizes with the EPA rule for new trucks and engines nationally. Existing heavy-duty

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-9
vehicle regulations in California include engine criteria emission standards, tractor-trailer GHG requirements to implement SmartWay strategies (i.e., the Heavy-Duty Tractor-Trailer GHG Regulation), and inuse fleet retrofit requirements such as the Truck and Bus Regulation.

In September 2011, the EPA adopted their new rule for HDTs and engines. The EPA rule has compliance requirements for new compression and spark ignition engines, as well as trucks from Class 2b through Class 8. Compliance requirements begin with model year 2014 with stringency levels increasing through model year 2018. The rule organizes truck compliance into three groupings, which include a) heavy-duty pickups and vans; b) vocational vehicles; and c) combination tractors. The EPA rule does not regulate trailers.

CARB staff has worked jointly with the EPA and the NHTSA on the next phase of federal GHG emission standards for medium-duty trucks (MDT) and HDT vehicles, called federal Phase 2. The federal Phase 2 standards were built on the improvements in engine and vehicle efficiency required by the Phase 1 emission standards and represent a significant opportunity to achieve further GHG reductions for 2018 and later model year HDT vehicles, including trailers. But as discussed above, the EPA and NHTSA have proposed to roll back GHG and fuel economy standards for cars and light-duty trucks, which suggests a similar rollback of Phase 2 standards for MDT and HDT vehicles may be pursued.

In February 2019, the OAL approved the Phase 2 Heavy-Duty Vehicle GHG Standards and became effective April 1, 2019. The Phase 2 GHG standards are needed to offset projected VMT growth and keep heavy-duty truck CO2 emissions declining. The federal Phase 2 standards establish for the first time, federal emissions requirements for trailers hauled by heavy-duty tractors. The federal Phase 2 standards are more technology-forcing than the federal Phase 1 standards, requiring manufacturers to improve existing technologies or develop new technologies to meet the standards. The federal Phase 2 standards for tractors, vocational vehicles, and heavy-duty pick-up trucks and vans (PUVs) will be phased-in from 2021-2027, additionally for trailers, the standards are phased-in from 2018 (2020 in California) through 2027.

REGIONAL REGULATIONS
SCAQMD
SCAQMD is the agency responsible for air quality planning and regulation in the SCAB. The SCAQMD addresses the impacts to climate change of projects subject to SCAQMD permit as a lead agency if they are the only agency having discretionary approval for the project and acts as a responsible agency when a land use agency must also approve discretionary permits for the project. The SCAQMD acts as an expert commenting agency for impacts to air quality.

This expertise carries over to GHG emissions, so the agency helps local land use agencies through the development of models and emission thresholds that can be used to address GHG emissions.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-10
In 2008, SCAQMD formed a Working Group to identify GHG emissions thresholds for land use projects that could be used by local lead agencies in the SCAB. The Working Group developed several different options that are contained in the SCAQMD Draft Guidance Document – Interim CEQA GHG Significance Threshold, that could be applied by lead agencies. The working group has not provided additional guidance since the release of the interim guidance in 2008. The SCAQMD Board has not approved the thresholds; however, the Guidance Document provides substantial evidence supporting the approaches to significance of GHG emissions that can be considered by the lead agency in adopting its own threshold.

The current interim thresholds consist of the following tiered approach:
• Tier 1 consists of evaluating whether or not the project qualifies for any applicable exemption under CEQA.
• Tier 2 consists of determining whether the project is consistent with a GHG reduction plan. If a project is consistent with a qualifying local GHG reduction plan, it does not have significant GHG emissions.
• Tier 3 consists of screening values, which the lead agency can choose, but must be consistent with all projects within its jurisdiction. A project’s construction emissions are averaged over 30 years and are added to the project’s operational emissions. If a project’s emissions are below one of the following screening thresholds, then the project is less than significant:
o Residential and commercial land use: 3,000 MTCO2e/yr
o Industrial land use: 10,000 MTCO2e/yr
o Based on land use type: residential: 3,500 MTCO2e/yr; commercial: 1,400 MTCO2e/yr; or mixed use: 3,000 MTCO2e/yr
• Tier 4 has the following options:
o Option 1: Reduce Business-as-Usual (BAU) emissions by a certain percentage; this percentage is currently undefined.
o Option 2: Early implementation of applicable AB 32 Scoping Plan measures o Option 3: 2020 target for service populations (SP), which includes residents and employees: 4.8 MTCO2e per SP per year for projects and 6.6 MTCO2e per SP per year for plans;
o Option 3, 2035 target: 3.0 MTCO2e per SP per year for projects and 4.1 MTCO2e per SP per year for plans.
• Tier 5 involves mitigation offsets to achieve target significance threshold.

The SCAQMD’s interim thresholds used the Executive Order S-3-05-year 2050 goal as the basis for the Tier 3 screening level. Achieving the Executive Order’s objective would contribute to worldwide efforts to cap CO2 concentrations at 450 ppm, thus stabilizing global climate. SCAQMD only has authority over GHG emissions from development projects that include air quality permits. At this time, it is unknown if the project would include stationary

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-11
sources of emissions subject to SCAQMD permits. Notwithstanding, if the Project requires a stationary permit, it would be subject to the applicable SCAQMD regulations.

SCAQMD Regulation XXVII, adopted in 2009 includes the following rules:
• Rule 2700 defines terms and post global warming potentials. • Rule 2701, SoCal Climate Solutions Exchange, establishes a voluntary program to encourage, quantify, and certify voluntary, high quality certified GHG emission reductions in the SCAQMD.
• Rule 2702, GHG Reduction Program created a program to produce GHG emission reductions within the SCAQMD. The SCAQMD will fund projects through contracts in response to requests for proposals or purchase reductions from other parties.

SCAQMD Rule 2305
The SCAQMD adopted Rule 2305, the Warehouse Indirect Source Rule, on May 7, 2021.

Owners and operators associated with warehouses 100,000 square feet (sf) or larger are required to directly reduce NOX and PM emissions, or to otherwise facilitate emission and exposure reductions of these pollutants in nearby communities. While NOX and PM emissions are the target of this regulation, GHG emission reductions would also be realized through the implementation of zero-emission and/or near-zero emissions trucks, solar panels, and electric vehicle chargers.

LOCAL REGULATIONS
City of Corona Climate Action Plan (CAP)
In June 2020, the City adopted the 2019 CAP Update, which includes an interim goal of reducing GHG emission to 49% below 2008 levels by the year 2030 and a longer-term GHG reduction goal of 66% below 2008 levels by 2040. The interim and longer-term goals put the City on a path toward the state’s long-term goal to reduce emissions 80% below 1990 levels by 2050. The 2019 CAP Update (establishes goals and policies that encourage energy efficiency, water conservation, alternative transportation, solid waste reduction, and clean energy.

For new development projects in the City, consistency with the CAP is obtained by using Screening Tables to confirm the project’s features equate to 100 points. The point values in the Screening Tables were derived from the projected emissions reductions that would be achieved by each of the reduction measures associated with new development within the City. The points within the Screening Tables calculated using projected growth in households and commercial uses in 2030 and proportioning the appropriate reduction quantities for new development to the residential, commercial, and industrial land use sectors within the Screening Tables. The resulting point values are assigned by residential unit or commercial/industrial square footage.

The size of the project is not relevant, each project must obtain 100 points in the Screening

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-12
Tables to demonstrate consistency with the CAP. The result is that the GHG emissions calculated for a project, which are directly tied to its size, are not used to determine CAP consistency. Rather, project efficiency becomes important through use of the Screening Tables.

City of Corona 2020–2040 General Plan
Circulation Element
Policy CE-1.4 Design and employ traffic control measures to ensure City streets and roads function with safety and efficiency.

Policy CE-1.7 Limit driveway and local street access on arterial streets to maintain a desired quality of traffic flow. Wherever possible, consolidate driveways and implement access controls during redevelopment of adjacent parcels.

Policy CE-1.10 Require a traffic analysis to be prepared in accordance with the City’s adopted Traffic Impact Study Guidelines and require projects to mitigate impacts on the City’s circulation system that exceed the City’s adopted service thresholds for near term and future conditions.

Intercity and Regional Transportation
Policy CE-2.1 Support RCTC and Caltrans efforts to improve management of the SR91, I-15, and SR-71. Promote improvements that reduce regional cut-through traffic on City streets and work with RCTC and Caltrans to ensure that accessibility to these facilities is provided to Corona residents.

Policy CE-2.2 Support regional transportation infrastructure that would provide alternative connections and access to neighboring counties and reduce the volume of cutthrough traffic on City streets.

Transportation Management
Policy CE-3.3 Encourage employers to reduce vehicular trips by offering to employees commute trip reduction programs, such as transit fare subsidies, alternative work schedules and telecommuting, employer-sponsored van pools or shuttles, ride share programs, and bike share.

Public Transportation
Policy CE-4.2 Work with the Riverside Transit Agency to identify needs for additional bus services and enhancements to existing services.

Policy CE-4.5 Encourage employers to reduce single-occupant vehicular trips by providing employee incentives (e.g., reduced rate transit passes).

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-13
Policy CE-4.6 Require new development to provide transit facilities, such as bus shelters and turnouts, where deemed necessary, to encourage the use of transit and other alternative forms of transportation.

Policy CE-4.7 Preserve options for expanding future transit use when designing improvements for roadways or redeveloping major developments and including areas for transit facilities.

Bicycle and Pedestrian Facilities
Policy CE-5.2 Maintain existing pedestrian facilities and encourage new development to provide walkways between and through developments.

Policy CE-5.3 Provide for safe accessibility to and use of pedestrian facilities by people with disabilities to implement accessibility requirements under the American with Disabilities Act.

Policy CE-5.6 Encourage new and existing development to provide accessible and secure areas for bicycle storage. Provide bicycle racks or storage facilities at public facilities and require bicycle parking, storage, and other support facilities as part of new office and retail developments.

Policy CE-5.7 Use easements and/or rights-or-way along flood control channels, public utilities, railroads, and streets wherever possible for bikeways and equestrian and hiking trails.

Goods Movement
Policy CE-6.1 Provide primary truck routes on selected arterial streets that will serve the business community while minimizing the impacts of through truck traffic into residential areas.

Policy CE-6.2 Provide appropriately designed and maintained roadways in accordance with local, state, and federal standards for truck routes so that they can safely accommodate truck travel.

Policy CE-6.3 Develop appropriate treatments along local truck routes to minimize noise and vibration impacts on sensitive land uses that are adjacent to or impacted by the truck route.

Policy CE-6.4 Ensure that new development provides adequate on-site truck loading facilities and enforce prohibition of queuing of trucks on public streets or in other areas not intended for such uses.

Policy CE-6.6 Strive to minimize through truck traffic in residential neighborhoods and other areas not intended for such travel, and enforce City codes that restrict or prohibit trucks on certain streets.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-14
Parking
Policy CE-7.3 Encourage employers to include strategic parking provisions in new developments, where feasible, to encourage the use of transit and other modes of travel rather than single-occupancy autos.

Policy CE-7.4 Accommodate joint use of parking facilities as part of an area plan or site plan, based on the peak parking demands of permitted uses in the planning area.

Land Use Element
Policy LU-1.2 Emphasize the development of uses that sustain Corona as a cohesive, distinct, and self- sustaining community and minimize the need for residents to travel to surrounding communities for retail goods, services, and employment.

Policy LU-6.1 Promote sustainable features in new construction and significant renovations, including the use of locally sourced, recycled, and sustainable-sourced building materials, energy- and water-efficient building design, integrated renewable energy and energy storage systems, and waste minimization during construction.

Policy LU-6.2 Require that new residential, commercial, office, and industrial development be designed to minimize consumption of and sustain scarce environmental resources through:
• Site design—concentration and intermixing of development to minimize vehicular trips and promote walking and building orientation for solar access and heat gain and loss. • Landscaping—drought-tolerant species, use of recycled water for irrigation, and other purposes.
• Capture of rainwater and re-use on site.
• Building design and construction materials—energy-and water efficient fixtures, recycled building materials, insulation and wall thickness, permeable paving surfaces, and comparable techniques.

Policy LU-10.6 Establish a multi-use trail system that connects the rural and estate neighborhoods adjoining open spaces and parklands. These may be developed for pedestrians, bicycles, and/or for horseback riding where allowed by zoning.

Policy LU-11.6 Require that transit-supporting facilities, such as bus turnouts, passenger drop-offs, and shelters, be incorporated in new commercial centers or when subject to major renovation and improvement, where appropriate to support local, citywide, and regional transit systems. The location and type of facility should be coordinated with transit agencies.

Policy LU-12.7 Regulate the development of industrial uses (consistent with local regulation and state law) that use, store, produce, or transport toxic and hazardous materials; generate unacceptable levels of air or noise pollution; or result in other adverse impacts.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-15
Policy LU-13.2 Limit retail commercial and professional office uses within a mixedresidential- commercial/office use development to those uses that are compatible with residential uses.

Policy LU-13.3 Require that adequate open space and, for larger projects, recreational facilities be incorporated into mixed-use development projects to meet the need of their residents and improve overall aesthetics.

Healthy Community Element
Policy HC-2.5 Require the preparation of air quality, noise, and vibration technical studies to determine the impact of proposed new development on adjacent and surrounding land uses and to identify the appropriate measures required to mitigate such impacts.

Housing Element (2021-2029)
Policy H-1.2 Promote specific plans and zoning map amendments that provide a variety of housing types and densities based on the suitability of the land, including the availability of infrastructure, the provision of adequate City services and recognition of environmental constraints.

Policy H-1.4 Support the development of sustainable projects that reduce demand for water and energy resources, reduce commute times and operational costs, and provide for transitoriented development.

Environment Resources Element
Policy ER-12.1 Promote and encourage alternate employment work schedules for public- and private-sector businesses to achieve a reduction of employee-related motor vehicle emissions in accordance with SCAQMD Rule 2202.

Policy ER-12.2 Continue to cooperate with the SCAQMD and other local authorities in the air basin, in implementing air emission reduction programs and techniques.

Policy ER-12.3 Establish and strictly enforce controls on land use activities that contain operations or materials that individually or cumulatively add significantly to the degradation of air quality in Corona.

Policy ER-12.6 Support major commercial centers and employment center projects, having 100 or more employees, to incorporate transit amenities, access points, and van and carpool parking as part of the project.

Policy ER-12.8 Require new commercial and industrial development and redevelopment projects of sufficient scale and number of employees to provide adequate facilities for bicycles, such as bicycle racks located close to the front entranceways of buildings and shower facilities with lockers.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-16
Policy ER-12.9 Continue to incorporate bicycle lanes in all new and upgrade roadway projects in order to encourage commuter bicycle trips. Also, improve existing bicycle lanes for greater user safety.

Policy ER-12.11 Require that large-scale master-planned residential communities incorporate pedestrian and cycling paths/trails that link with adjacent neighborhoods, schools, areas of shopping and employment, community centers, other places of activity, and transit access points.

Policy ER-12.12 Provide effective utility of pedestrian and cycling paths/trails and place strong limitations on intrusions into these rights-of-way used for pedestrian and bicycling.

Policy ER-12.13 Reduce particulate emissions from paved and unpaved roads, parking lots, and road and building construction through the implementation of best practices as deemed feasible by the City of Corona.

Policy ER-12.14 Reduce energy consumed by commercial and residential uses by requiring the use and installation of energy conservation features in all new construction projects and wherever feasible, retrofitting existing and redevelopment projects.

Policy ER-13.2 Encourage the maximum feasible energy efficiency in site design, building orientation, landscaping, and utilities/infrastructure for all development and redevelopment projects (residential, commercial, industrial, and public agency) to support GHG emissions reductions.

Policy ER-13.3 Evaluate opportunities to reduce energy use and the urban heat island effect through site and building design, materials and landscaping, such as reflective roofs or pavement, vegetated roofs, pervious pavement, shade trees, and re-vegetation of paved areas.

Policy ER-13.4 Support the increase of clean energy supply to existing and new development and municipal facilities through means to include, but not be limited to: onsite or other local renewable energy sources for new and existing buildings and infrastructure.

Policy ER-13.5 Increase use of clean fuel and electric vehicles in the city through the support of the installation of electric vehicle infrastructure; explore opportunities to incentivize and/or facilitate installation of electric vehicle charging stations at convenient locations in Corona.

Policy ER-13.6 Reduce solid waste sent to the landfills and associated community-wide GHG emissions by ensuring all properties have access to curbside solid waste, recycled materials, and green/organic waste programs; target special programs for construction debris, household hazardous waste, etc.

Policy ER-13.7 Support a wide variety of transportation related measures (e.g., active transportation, increased bus and rail transit, transportation system and demand management,

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-17
etc.) as articulated in the Circulation Element to reduce the number of vehicle miles traveled in Corona.

Infrastructure and Utilities Element
Policy IU-7.7 Encourage the reduction of energy consumption through passive solar building orientation as well as the installation of rooftop solar energy systems and energyefficient technologies.

4.8.5 PROJECT DESIGN FEATURES
No Project Design Features are proposed for the Modified Project.

4.8.6 THRESHOLDS OF SIGNIFICANCE
Based on the relevant CEQA Guidelines as currently implemented by the City of Corona, significant greenhouse gas emission impacts would occur if the proposed Project or any Project-related component would:

Threshold GHG-1 Generate GHG emissions, either directly or indirectly, that may have a significant impact on the environment?
Threshold GHG-2 Conflict with an applicable plan, policy or regulation adopted for the purpose of reducing the emissions of GHGs?

METHODOLOGY
This section describes existing global climate change conditions, existing rules and regulations as adopted by the state and the City of Corona 2020–2040 General Plan (2020) and City of Corona’s (City’s) 2019 Climate Action Plan (CAP) Update (2019) to reduce greenhouse gas (GHG) emissions, an inventory of the approximate GHG emissions that would result from implementation of the Modified Project, and an analysis of the significance of the impact of these GHG emissions. The analysis in this section is based in part on the following information:

Green River Ranch Specific Plan Amendment, SP00-001 Amendment No.1, Greenhouse Gas Analysis (GHG Analysis), dated June 14, 2024, and prepared by Urban Crossroads (Appendix H), City’s 2019 CAP Update (2019), and South Coast Air Quality Management District (SCAQMD) Interim California Environmental Quality Act (CEQA) GHG Significance Threshold Guidance Document (2008).

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-18

4.8.7 ENVIRONMENTAL IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Impacts
Would the
Modified
Project result
in new or more
severe impacts
requiring
revisions to
the Prior EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions to
the Prior EIR?
Is there new
information that
would result in new
or more severe
impacts from the
Modified Project
requiring revisions
to the Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

GHG-1 Generate GHG
emissions, either
directly or
indirectly, that may
have a significant
impact on the
environment?
GHG-2 Conflict with an
applicable plan,
policy or regulation
adopted for the
purpose of reducing
the emissions of
GHGs?

IMPACTS ASSOCIATED WITH THE MODIFIED PROJECT
Impact GHG-1: Generate GHG emissions, either directly or indirectly, that may have a significant impact on the environment?
Impact GHG-2: Conflict with an applicable plan, policy or regulation adopted for the purpose of reducing the emissions of GHGs?
Under changed circumstances the Modified Project resultsin new or more severe impacts requiring revisions to the 2001 EIR.

As stated in the GHG Analysis, the Modified Project would result in direct and indirect emissions of CO2, CH4, N2O and Refrigerants. Direct Project-related GHG emissions include emissions from construction activities, area sources, and mobile sources, while indirectsources include emissions from electricity consumption, water demand, and solid waste generation.

Project-related GHG emissions were quantified with CalEEMod Version 2022.1, which relies upon vehicle trip rates and Project-specific land use data to calculate emissions. As shown below in Table 4.8-1, the Modified Project would result in a total of approximately 19,208.02 MTCO2e/yr.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-19
Table 4.8-1: Project GHG Emissions
Emissions Source
Emissions (MT/yr)
CO2 CH4 N2O Refrigerants Total CO2e
Annual construction-related
emissions amortized over 30
years

87.36 3.07E-03 5.04E-03 5.12E-02 88.99
Mobile Source 13,952.83 0.48 1.18 19.90 14,336.03
Area Source 23.24 0.00 0.00 0.00 23.30
Energy Source 3,631.75 0.34 0.03 0.00 3,649.06
Water Usage 80.47 1.11 0.03 0.00 116.27
Waste 95.62 9.56 0.00 0.00 334.54
Refrigerants 0.00 0.00 0.00 52.73 52.73
On-Site Equipment 142.10
TRUs 407.70
Total CO2e (All Sources) 19,208.02
Source: Urban Crossroads, 2023 (Appendix H)
As noted previously, instead of showing consistency with an adopted numeric threshold of significance for GHG emissions, the City’s CAP utilizes a point system to show consistency through use of a point system. Calculation of the points is conducted using the CAP Screening Tables, which allocates points for specific features of a project or features that can be added to a project to obtain the necessary points. The points are based on the GHG reduction value of the feature. For this reason, the Modified Project’s GHG emissions of 19,208.02 MTCO2e/yr, is not specifically evaluated because the CAP implements a project efficiency based determination of consistency with CEQA Guidelines Section 15064.4(b) by considering whether the Modified Project is consistent with applicable regulations or requirements adopted to implement a Statewide, regional, or local plan for the reduction or mitigation of GHG emissions.

The Modified Project shall show CAP consistency with the CAP through use of the Screening Table Measures to show the Project’s GHG reduction features obtain a minimum of 100 points.

The Modified Project would be consistent with the CAP’s requirement to achieve at least 100 points for both the residential and non-residential portions of the Project and thus the Project would be considered to have a less than significant individual and cumulatively considerable impact on GHG emissions. The City shall verify incorporation of the identified Screening Table Measures within the Project building plans and site designs prior to the issuance of building permit(s) and/or site plans (as applicable).

As previously stated, a minimum of 100 points will be required for both the residential and non-residential portions of the Modified Project. The City shall verify incorporation of the identified Screening Table Measures within the Project building plans and site designs prior to the issuance of building permit(s) and/or site plans (as applicable). Projects that achieve a total

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-20
of 100 points or more are considered to have a less than significant individual and cumulative impact on GHG emissions.

In order to ensure the appropriate GHG reduction features are implemented, new Mitigation Measure MM GHG-1, shall be required to ensure each phase of the Modified Project includes applicable measures from the CAP Screening Tables (Appendix C to the CAP) to achieve a minimum of 100 points for both the residential and non-residential portions of the Modified Project. Alternatively, specific measures may be substituted for other measures that achieve an equivalent amount of GHG reduction, subject to City of Corona Building Division review.

As previously discussed, the Project would not generate significant GHG emissions, nor conflict with any applicable plan, policy or regulation. Therefore, a less than significant impact is expected with mitigation measure MM GHG-1 incorporated.

Overall, the Modified Project implemented under changed circumstances would result in new or more severe impacts requiring revisions to the Prior EIR.

Mitigation Measure
The Modified Project introduces the following Mitigation Measures and are further described in detail Section 4.8.10.
• MM GHG-1

4.8.8 CUMULATIVE IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
GHG emissions impacts are assessed in a cumulative context, since no single project can cause a discernible change to climate. Climate change impacts are the result of incremental contributions from natural processes, and past and present human-related activities. Therefore, the area in which a proposed project in combination with other past, present, or future projects, could contribute to a significant cumulative climate change impact would not be defined by a geographical boundary such as a project site or combination of sites, city or air basin. Even though the emissions of GHGs cannot be defined by a geographic boundary and are effectively part of the global issue of climate change, CEQA places a boundary for the analysis of impacts at the state’s borders. Thus, the geographic area for analysis of cumulative GHG emissions impacts is the State of California. Therefore, the Modified Project would generate GHG emissions that would contribute to cumulative emissions in California.

The Modified Project would not generate significant GHG emissions, nor conflict with any applicable plan, policy or regulation with mitigation measure MM GHG-1 incorporated resulting in a less than significant impact. As a result, with the implementation of mitigation and GHG reduction strategies, the Modified Project’s cumulative GHG emissions would be considered less than significant.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-21

4.8.9 MITIGATION MEASURES IDENTIFIED IN PRIOR EIR APPLICABLE TO

MODIFIED PROJECT
No mitigation measures related to Greenhouse Gas Emissions were included in the 2001 EIR.

4.8.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT MM GHG-1: Prior to issuance of a building permit for each increment of development in the GRRSP, the Project applicant shall provide documentation to the City of Corona Building Division demonstrating that the improvements and/or buildings subject to a building permit application include the measures from the CAP GHG Emissions Screening Tables (Appendix C to the CAP), as needed to achieve a minimum of 100 points for both the residential and non-residential portions of the Project. Alternatively, specific measures may be substituted for other measures that achieve an equivalent amount of GHG reduction, subject to City of Corona Building Division review.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

GREENHOUSE GAS EMISSIONS

ENPLANNERS

4.8-22
This Page Intentionally Left Blank

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-1

4.9 HAZARDS AND HAZARDOUS MATERIALS

4.9.1 INTRODUCTION
This section provides a summary of applicable impacts and mitigation measures from the 2001 EIR, an overview of existing hazards and hazardous materials within the GRRSP Planning Area and surrounding region, a summary of applicable regulations, and analyses of potential changes in impacts to hazards and hazardous materials from implementation of the Modified Project in comparison to the Approved Project. Scoping Meeting comments from Bruce Fields were received pertaining to this topic. No NOP comment letters were received pertaining to this topic.

This section of the Draft SEIR is based in part on the Phase I Environmental Site Assessment Update Assessor’s Parcel Numbers (APNS) 101-180-014, -015, -037 AND -038 (ESA), prepared by GeoTek, Inc. (GeoTek), dated August 19, 2019 (Appendix J). The ESA addresses the proposed BPI Development (PAs 1, 2, 3) and future Estate Residential (PA 5) components of the Modified Project area.

4.9.2 SUMMARY OF IMPACTS AND MITIGATION MEASURES FROM THE 2001 EIR
The 2001 EIR determined the Approved Project would not generate impacts related to hazards and hazardous materials. The Approved Project impact analysis related to hazards and hazardous materials as presented in the 2001 EIR as well as any mitigation measures identified to reduce significant impacts are summarized as follows. a) A risk of accidental explosion or release of hazardous substances? Potential land uses that could develop upon implementation of the Approved Project include office, light industrial, and retail uses that could entail transferring, storing, and dispensing limited amounts of oil and gasoline products. The 2001 EIR noted potential impacts are associated primarily with operation of light industrial and auto oriented commercial uses. In addition, hazardous materials such as pesticides, fertilizer, and paint products were disclosed in the 2001 EIR as being potentially stored and sold in conjunction with retail-oriented uses within the GRRSP. However, the prior EIR noted transportation, storage, and handling of such materials is routinely conducted at commercial facilities of this nature in accordance with federal and state safety standards. Consequently, the 2001 EIR concluded risk of accidental explosion or release of hazardous substances was considered less than significant and no mitigation was determined necessary.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-2
b) Possible interference with an emergency response plan or emergency evacuation plan?
Implementation of the Approved Project would result in new development in accordance with the land uses contained in the GRRSP. The Approved Project would not interfere with adopted emergency response or emergency evacuation plans. Consequently, the 2001 EIR concluded the Approved Project would not interfere with an emergency response plan or emergency evacuation plan and impacts were considered less than significant requiring no mitigation. c) The creation of any health hazard or potential health hazard? The Approved Project proposed land uses in the GRRSP would allow development of business park/office commercial, retail, service, and residential uses. The non-residential components of the GRRSP could result in development of uses that store and dispense potentially hazardous materials as discussed in Section 4.9.2 a) above. The risk of accidental release of hazardous substances associated with the Approved Project was determined to be less than significant requiring no mitigation.
d) Exposure of people to existing sources of potential health hazards? No existing health hazards were identified in the GRRSP Planning Area. Exposure of people to existing health hazards resulting from implementation of the Approved Project was determined to be unlikely, as no existing health hazards were identified in the project vicinity.

Consequently, the 2001 EIR concluded the Approved Project would not expose people to existing sources of potential health hazards and impacts were considered less than significant requiring no mitigation.
e) Emissions within 0.25 mile of schools? (Air Quality) The 2001 EIR noted that no schools are located in the vicinity of the GRRSP Planning Area.

The nearest existing school, Prado View Elementary School, was determined to be located approximately 1.5 miles to the east of the Approve Project and no schools were known to be planned any closer than Prado View Elementary School.

Cumulative Impacts
Because the Approved Project would not result in an impact associated with hazards or hazardous materials, it can be concluded cumulative impacts would be less than significant as there were no other development projects that would produce impacts that would comingle with those from the Approved Project creating a significant agricultural impact over and above those at the Approved Project level. Therefore, cumulative impacts were determined to be less than significant requiring not mitigation.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-3

4.9.3 ENVIRONMENTAL SETTING
The GRRSP Planning Area encompasses the area adjacent to Green River Road, east of the SR-91/Green River Road interchange and west of Dominguez Ranch Road. The Project site is largely undeveloped. However, the site is surrounded by residential development to the north (beyond the SR-91), vacant and disturbed land to the south, residential and commercial development to the east, and vacant and disturbed land to the west. Vacant areas are mostly covered with native vegetation, much of which consists of low-lying scrub. Elevations on site range from 1,110 feet in the southwestern corner of the property to 515 feet in the northeastern corner of the property.

The southern portion of the property is in an undeveloped natural condition dominated by rugged hillside terrain of the Santa Ana Mountains vegetated by grass, brush, scrub, and chaparral. Due to the topography of the property, development has been limited to the northern portion of the Specific Plan area. The eastern portion of the GRRSP Planning Area is occupied by two single-family residences. Several equestrian stables, one above water reservoir and a concrete lined stormwater basin related to prior horse boarding operations remain on-site.

Based on readily available historic information, the ESA determined the Site appears to have been vacant land from at least 1931 until approximately 1946. Two residential structures and associated agricultural land can be observed in the northeastern portion of the Site from at least 1946 until approximately 1987. From 1946 to the present, the above ground water reservoir can be seen on the northeast portion of the Site and the concrete lined stormwater basin can be seen near the eastern property line from 1953 to the present. Portions of the Site appear to have been used for agricultural fields from approximately 1946 to 1953. From 1987 to approximately 1990 a commercial building with surrounding parking areas can be observed.

Within the commercial building pad several floor tiles are currently present. Aerial photography from 1994 shows the central and northern portions of the Site being used as equestrian stables. There are numerous in-use and abandoned storage containers, farm equipment and vehicles, and various sized horse pens. By 1994 the site appears to be similar to the current condition. The surrounding properties appear to historically have been vacant and undeveloped land, or occupied by residential development, since at least 1938. The residential development to the east of the Site can first be observed in an aerial photograph dated 1990. The commercial development to the northeast can first be observed in an aerial photograph dated 1994.

4.9.4 PROJECT DESIGN FEATURES (PDF)
No Project Design Features are proposed for the Modified Project.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-4

4.9.5 EXISTING REGULATIONS, PLANS, PROGRAMS, AND POLICIES

FEDERAL REGULATIONS
Comprehensive Environmental Response, Compensation and Liability Act The Comprehensive Environmental Response, Compensation and Liability Act of 1980 (CERCLA) is a law developed to protect the water, air, and soil resources from the risks created by past chemical-disposal practices. This law is also referred to as the Superfund Act and regulates sites on the National Priority List (NPL), which are called Superfund sites.

Emergency Planning and Community Right-To-Know Act
In 1986, Congress passed the Superfund Amendments and Reauthorization Act. Title III of this regulation may be cited as the “Emergency Planning and community Right-to-Know Act of 1986” (EPCRA). The Act required the establishment of state commissions, planning districts, and local committees to facilitate the preparation and implementation of emergency plan. Under the requirements, local emergency planning committees are responsible for developing a plan for preparing for and responding to a chemical emergency, including:
• An identification of local facilities and transportation routes where hazardous materials are present.
• The procedures for immediate response in case of an accident (this must include a community-wide evacuation plan).
• A plan for notifying the community that an incident has occurred. • The names of response coordinators at local facilities. • A plan for conducting drills to test the plan.

The emergency plan is reviewed by the State Emergency Response Commission and publicized throughout the community. The local emergency planning committee is required to review, test, and update the plan each year. The Riverside County Department of Environmental Health is responsible for coordinating hazardous material and disaster preparedness planning and appropriate response efforts with city departments and local and state agencies. The goal is to improve public- and private-sector readiness and to mitigate local impacts resulting from natural or man-made emergencies.

Another purpose of the EPCRA is to inform communities and citizens of chemical hazards in their areas. Sections 311 and 312 of EPCRA require businesses to report to state and local agencies the location and quantities of chemicals stored onsite. Under section 313 of EPCRA, manufacturers are required to report chemical releases for more than 600 designated chemicals.

In addition to chemical releases, regulated facilities are also required to report offsite transfers of waste for treatment or disposal at separate facilities, pollution prevention measures, and

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-5
chemical recycling activities. The US Environmental Protection Agency (EPA) maintains the Toxic Release Inventory database that documents the information that regulated facilities are required to report annually.

Resource Conservation and Recovery Act
The Resource Conservation and Recovery Act (RCRA) is the principal federal law that regulates generation, management, and transportation of hazardous waste. Hazardous waste management includes the treatment, storage, or disposal of hazardous waste.

STATE REGULATIONS
Hazardous Materials Release Notification
Many state statutes require emergency notification of a hazardous chemical release:
• California Health and Safety Codes Sections 25270.8, and 25507 • Vehicle Code Section 23112.5
• Public Utilities Code Section 7673, (PUC General Orders #22-B, 161) • Government Code Sections 51018, 8670.25.5 (a)
• Water Codes Sections 13271, 13272,
• California Labor Code Section 6409.1 (b)10
Requirements for immediate notification of all significant spills or threatened releases cover owners, operators, persons in charge, and employers. Notification is required regarding significant releases from facilities, vehicles, vessels, pipelines, and railroads. In addition, all releases that result in injuries or harmful exposure to workers must be immediately reported to the California Occupational Safety and Health Administration pursuant to the California Labor Code Section 6409.1(b).

Hazardous Materials Disclosure Programs
The Unified Program administered by the State of California consolidates, coordinates, and makes consistent the administrative requirements, permits, inspections, and enforcement activities for environmental and emergency management programs, which include: Hazardous Materials Release Response Plans and Inventories (business plans), the California Accidental Release Prevention (CalARP) Program, and the Underground Storage Tank (UST) Program.

The Unified Program is implemented at the local government level by Certified Unified Program Agencies (CUPAs).

The CUPA for the City of Corona is the Riverside County Department of Environmental Health (DEH), which is responsible for regulating hazardous waste and tiered permitting; underground storage tanks; aboveground storage tanks; and risk management plans.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-6
The Corona Fire Department (CFD) is a Participating Agency under the Certified Unified Program, and administers Hazardous Materials Release Response Plan and Inventory Program and Hazardous Materials Management Plans and Inventory and permits for handling underground storage and storage of hazardous materials pursuant to the Corona Fire Code.

Hazardous Materials Business Plans
Both the federal government (Code of Federal Regulations) and the State of California (California Health and Safety Code) require all businesses that handle more than a specified amount—or “reporting quantity”—of hazardous or extremely hazardous materials to submit a hazardous materials business plan to the CFD. According to City guidelines, the preparation, submittal, and implementation of a business plan is required by any business that handles a hazardous material or a mixture containing a hazardous material in specified quantities.

Business plans must include an inventory of the hazardous materials at the facility. Businesses must update their business plan and the chemical portion annually. Also, business plans must include emergency response plans and procedures to be used in the event of a significant or threatened significant release of a hazardous material. These plans need to identify the procedures for immediate notification of all appropriate agencies and personnel, identification of local emergency medical assistance appropriate for potential accident scenarios, contact information for all company emergency coordinators, a listing and location of emergency equipment at the business, an evacuation plan, and a training program for business personnel.

California Accidental Release Prevention Program
CalARP became effective on January 1, 1997, in response to Senate Bill 1889. CalARP aims to be proactive and therefore requires businesses to prepare risk management plans, which are detailed engineering analyses of the potential accident factors present at a business and the mitigation measures that can be implemented to reduce this accident potential. This requirement is coupled with the requirements for preparation of hazardous materials business plans under the Unified Program, implemented by the CUPA.

Leaking Underground Storage Tanks
Leaking USTs have been recognized since the early 1980s as the primary cause of groundwater contamination from gasoline compounds and solvents. In California, regulations aimed at protecting against UST leaks have been in place since 1983 (Health and Safety Code). This occurred one year before RCRA was amended to add Subtitle I, requiring UST systems to be installed in accordance with standards that address the prevention of future leaks. The State Water Resources Control Board has been designated the lead California regulatory agency in the development of UST regulations and policy.

Older tanks are typically single-walled steel tanks. Many of these have leaked as a result of corrosion, punctures, and detached fittings. As a result, the State of California required the

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-7
replacement of older tanks with new double-walled fiberglass tanks with flexible connections and monitoring systems. UST owners were given 10 years to comply with the new requirements—deadline was December 22, 1998. However, many UST owners did not act by the deadline, so the state granted an extension for their replacement ending January 1, 2002.

The California Regional Water Quality Control Boards, in cooperation with the Office of Emergency Services, maintain an inventory of leaking USTs in a statewide database.

California Code of Regulations, Title 22, Division 4.5
Title 22, Division 4.5, of the California Code of Regulations (CCR) sets forth the requirements for hazardous waste generators; transporters; and owners or operators of treatment, storage, or disposal facilities. These regulations include the requirements for packaging, storage, labeling, reporting, and general management of hazardous waste prior to shipment. In addition, the regulations identify standards applicable to transporters of hazardous waste. These regulations specify the requirements for transporting shipments of hazardous waste, including manifesting, vehicle registration, and emergency accidental discharges during transportation.

California Fire Code
The California Fire Code (CCR Title 24 Part 9) sets forth requirements including those for building materials and methods pertaining to fire safety and life safety, fire protection systems in buildings, emergency access to buildings, and handling and storage of hazardous materials.

The city adopts the update to the CFC every three years.

California Building Code
The California Building Code requires the installation and maintenance of smoke alarms in residential dwelling units:
• CCR Title 24, Part 2, Section 907.2.11.2. Smoke alarms shall be installed and maintained on the ceiling or wall outside of each separate sleeping area in the immediate vicinity of bedrooms. In each room used for sleeping purposes, and in each story within a dwelling unit. The smoke alarms shall be interconnected.

Evacuation Routes
Government Code Section 65302 requires the Safety Element of a General Plan to address evacuation routes. The California Department of Forestry and Fire Protection (CAL FIRE) Safety Element checklist also requires cities to address evacuation routes. In addition, Senate Bill 99 (2018) requires a Safety Element, upon the next revision of the housing element on or after January 1, 2020, to include information identifying residential developments in hazard areas that do not have at least two emergency evacuation routes.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-8

REGIONAL REGULATIONS
South Coast Air Quality Management District
SCAQMD Rule 1403 governs the demolition of buildings containing asbestos materials. Rule 1403 specifies work practices with the goal of minimizing asbestos emissions during building demolition and renovation activities, including the removal and associated disturbance of asbestos-containing material (ACM). The requirements for demolition and renovation activities include asbestos surveying, notification, ACM removal procedures and time schedules, ACM handling and cleanup procedures, and storage and disposal requirements for asbestos-containing waste materials.

Riverside County Department of Environmental Health
In the SOI, the DEH is responsible for all components of the CUPA program described above, including Hazardous Materials Business Plans and hazardous materials inventories, for which CFD is responsible within the City of Corona.

Hazardous Waste Transporters and Disposal Facilities
The DEH list of hazardous waste transporters includes six in western Riverside County, including three in Corona (DEH 2015). No landfills in Riverside County accept hazardous waste; one landfill in surrounding counties, the Clean Harbors Westmoreland Landfill Facility near the City of Westmoreland in Imperial County, accepts such wastes (SWRCB 2016).

Two facilities in western Riverside County—one in the City of Corona and one in the City of Riverside—are listed by DEH as accepting universal wastes which include televisions, computers, and other electronic devices as well as batteries, fluorescent lamps, mercury thermostats, and other mercury-containing equipment (DEH 2014).

CAL FIRE, County of Riverside Unit Strategic Plan
The California Strategic Plan is implemented through individual “unit plans” that are prepared for different regions of the state. CAL FIRE has adopted a Riverside Unit Fire Plan that covers Riverside County and the agency’s priorities for prevention, protection, and suppression of wildfires. The overall goal of the Riverside County Unit Fire Plan is to reduce total costs and losses from wildland fire in the unit by protecting assets at risk through focused prefire management prescriptions and increasing initial attack success.

LOCAL REGULATIONS
City of Corona Local Hazard Mitigation Plan
The City of Corona has prepared a Local Hazard Mitigation Plan (LHMP) to identify the City’s hazards, review and assess past disaster occurrences, estimate the probability of future occurrences, and set goals to reduce or eliminate long-term risk to people and property from

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-9
natural and man-made hazards. Wildfire hazard is rated the second highest risk of the 23 hazards evaluated, after earthquakes. The LHMP contains a series of goals and mitigation programs to address each of the hazards.

City of Corona Emergency Operations Plan
The City of Corona has prepared an Emergency Operations Plan (EOP) to address the City’s planned response to natural disasters, technological incidents, and national security emergencies. The EOP does not address normal day-to-day emergencies or the wellestablished and routine procedures used in coping with such emergencies. The EOP’s operational concepts focus on potential large-scale disasters that can generate unique situations requiring unusual emergency responses. The EOP’s emergency management goals are:

1. Provide effective life safety measures and reduce property losses.

2. Provide for the rapid resumption of impacted businesses and community services.

3. Provide accurate documentation and records required for cost recovery efforts.

Corona Standards of Coverage Study and Fire Strategic Plan The Corona Fire Department sets the vision, mission, business operations and guiding principles for the department by means of a strategic plan. The purpose of the strategic plan is so that the members of the organization can envision its future and develop the necessary procedures and operations to achieve that future. The strategic plan is a foundational plan that assists the department in preparing annual fiscal year budgets, master plans, and other related activities it is required to perform. Although the planning period is eight years, it is updated annually to assess service levels, performance, and other needed functions that may change during the course of a year.

Corona Municipal Code
Chapter 2.52, Emergency Management Organization, provides for the preparation and carrying out of plans to protect people and property within the City of Corona during an emergency or disaster event.
• Section 2.52.060 establishes a Disaster Council in the event there is an emergency or disaster event in the City. The Disaster Council include the Fire Chief, who shall be the Council Chair, and member of the Riverside County Disaster Council, unless otherwise stated by the City Manager, and the Disaster Council shall include the Fire Department Emergency Services Director.
• Section 2.52.090 indicates that the Fire Chief shall be the Emergency Services Director and shall appoint an Emergency Services Coordinator.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-10
• Section 2.52.120 established the Corona Fire Department Office of Emergency Services, which consists of positions that may be established by the City Council by resolution. The Corona Fire Department are assigned the office and its responsibilities. • Section 2.52.130 establishes the position of Emergency Services Coordinator, which the Fire Chief shall appoint. The Emergency Services Coordinator, and associated duties, is assigned to the Fire Department, and the person serving that position is assigned to the Emergency Services Director.

Chapter 15.16, Fire Hazard Severity Zones, outlines the authority of the Fire Chief in determining Very High Fire Hazard Severity Zones (VHFHSZ) and creating a VHFHSZ map. • In Section 15.16.010, the City Council delegates authority to its Fire Chief to designate within the City VHFHSZs as required by California Government Code Section 51175 et seq. and other applicable state and federal laws, rules, and regulations. The Fire Chief has the authority to make any future revisions to the VHFHSZ in accordance with state and federal laws, rules, and regulations.
• In Section 15.16.020, the Fire Chief shall prepare and maintain a map titled the “City of Corona Very High Fire Hazard Severity Zones in LRA” (“VHFHSZ Map”) to show the VHFHSZ within the City. The Fire Chief has the authority to make any future revisions to the VHFHSZ Map in accordance with state and federal laws, rules, and regulations.
• In Section 15.16.040, the VHFHSZ Map is intended to be used in conjunction with the most current edition of the California Building Code, and supersedes any other maps previously adopted by the City designating high fire hazard areas. The Building Official shall be responsible for enforcing provisions of the code and other applicable law which may be applicable to property identified on the VHFHSZ Map within the City, pursuant to Section 3202, Title 24 of the California Code of Regulations and other applicable state and federal laws, rules, and regulations.

City of Corona 2020–2040 General Plan
Environmental Resources Element
Policy ER-1.2 Require all public and private grading and construction activities to minimize adverse impacts on the City’s water resources through the use of best management practices, as established and updated from time to time by the City of Corona.

Policy ER-1.3 Implement standard conditions of approval on development and related projects that require appropriate mediation strategies if soil or groundwater contamination is encountered during project grading and construction.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-11
Policy ER-1.4 Prohibit the discharge of toxins, debris, refuse, and other contaminants into watercourses, other drainages, water bodies, and groundwater basins. Work with appropriate entities to ensure the cleanup of contamination of existing water resources.

Policy ER-13.6 Reduce solid waste sent to the landfills and associated community-wide GHG emissions by ensuring all properties have access to curbside solid waste, recycled materials, and green/organic waste programs; target special programs for construction debris, household hazardous waste, etc.

Healthy Community Element
Policy HC-2.1 Require that proposals for new sensitive land uses and/or industrial and commercial uses incorporate the adequate use of setbacks, barriers, landscaping, or other design measures as necessary to minimize air quality impacts and achieve appropriate health standards.

Policy HC-2.2 Designate and maintain truck routes that are sufficient to serve the needs of industry and commerce while avoiding residential areas, schools, or other sensitive land uses so as to minimize exposure to the noise, air pollution, and vibration associated with trucks.

Policy HC-2.4 Ensure that individuals, neighborhoods, and businesses clearly understand the potential for adverse pollution, noise, odor, vibration, and lighting and glare, and the effects of toxic materials or emissions when generating uses are proposed near them.

Policy HC-2.6 Apply and enforce performance standards with respect to fire and explosion hazards, radio frequency or electrical disturbance, noise and vibration, dust, smoke, glare, underground storage tanks, or other potential sources of exposure to pollution.

Policy HC-4.6 Support housing construction practices, where initiated by developers, that are free from asbestos, volatile organic compounds, and other chemicals known to be hazards.

Land Use Element
Policy LU-2.1 Locate and design development to reflect Corona’s unique physical setting considering its natural topography, environmental resources, natural hazards, and opportunities for views in accordance with this plan’s policies.

Policy LU-4.3 Allow for the development of vacant lands on the periphery of existing development that complements the scale and pattern of existing uses; protects significant plant, animal, and other natural environmental resources; protects development and population from natural hazards; and where it is logical and feasible to extend infrastructure.

Policy LU-10.3 Minimize the removal of native landscape and integrate with new residential development, to the extent feasible and practical for fire control; require adherence to building construction and site designs necessary to minimize risks from wildfire, such as implementation of fuel modification areas, concrete tile roofs and boxed eaves.

Policy LU-10.4 Require that new development and major rehabilitations be located, designed, and built to maintain natural drainages, riparian vegetation, and the viability of habitats, except as necessary to protect from flooding or wildfire, or that impacted areas be properly mitigated.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-12
Policy LU-12.7 Regulate the development of industrial uses (consistent with local regulation and state law) that use, store, produce, or transport toxic and hazardous materials; generate unacceptable levels of air or noise pollution; or result in other adverse impacts.

Policy LU-16.1 Accommodate open spaces that can be used for recreation and conserved to protect significant plant and animal habitats and population from the risks of flood, fire, and seismic hazards in accordance with the designations of the land use plan.

Policy LU-16.7 Work with Corona Fire, CAL FIRE and Forest Service and with property owners in affected areas to reduce and minimize the hazards associated with wildfire in the hillsides and open spaces, consistent with the goals and policies of the safety element.

Policy LU-22.10 Collaborate with local, county, and regional governmental agencies to provide water, sewer, public safety, fire response, and other appropriate municipal services; coordinate emergency response services through mutual and automatic aid agreements.

Circulation Element
Policy CE-1.11 Provide all residential, commercial, and industrial areas with efficient and safe access for emergency vehicles, including undeveloped areas or those on the hillsides in high or very high fire hazard severity zones.

Infrastructure and Utilities Element
Policy IU-6.7 Continue to work with providers and businesses to educate the community and to provide household hazardous material, used oil, and electronic waste collection for the community.

Public Safety Element
Policy PS-3.1 Enforce federal and state regulations and local ordinances in accordance with Certified Unified Program Agency requirements that require all users, producers and transporters of hazardous materials and waste to clearly identify materials that they store, use or transport, and make available emergency response plans, emergency release reports, hazardous material inventory reports, and toxic chemical release reports to reduce the risk from natural or other hazards and effectively protect the community.

Policy PS-3.2 Require projects to comply with applicable land use regulation, building and fire codes, and local ordinances; determine the need for buffer zones/setbacks, building modifications, site design, operational changes, or other measures to minimize risk from hazardous materials.

Policy PS-3.8 Require property owners of contaminated sites to develop and implement, at their own expense, a site remediation plan to the satisfaction of the Riverside County and the California Department of Toxic Substances Control.

Policy PS-3.9 Minimize the potential risk of contamination to surface water and groundwater resources and implement restoration efforts to resources adversely impacted by past urban and rural land use activities.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-13
Policy PS-7.1 Require larger developments to incorporate site design features that help ensure maximum visibility and security for entrances, pathways, streets and sidewalks, corridors, public and private open space, and parking lots and structures.

Policy PS-7.2 Require the incorporation of appropriate lighting that provides adequate exterior illumination around commercial, business park, public spaces, parking lots, and multifamily structures.

Policy PS-7.3 Work with traffic engineers to develop methods through design, enforcement, and engineering to reduce the volume and severity of vehicle, pedestrian, and bicycling accidents citywide and around sensitive land uses such as schools, apartments, and other highly traveled uses.

Policy PS-7.5 Require large-scale retail developments to incorporate video surveillance security systems within their facilities and grounds to monitor open public spaces and, where appropriate and feasible, provide office space for police facilities.

Policy PS-8.2 Ensure that fire staff at all levels are sufficient in number and appropriately trained to effectively plan and respond to all types of fire and related emergencies in the community.

Policy PS-9.4 Maintain safe and accessible evacuation routes throughout the community; take precautions and ensure backup or mitigations for routes crossing high hazard areas (e.g., flood, seismic, high fire, etc.).

Policy PS-10.2 Require all improved and new homes, structures, and facilities in the very high fire hazard severity zones to adhere to additional fire safe design standards consistent with state law and local practice.

Policy PS-10.3 Require all improved and new developments to be thoroughly reviewed for their impact on safety and the provision of fire protection services as part of the development review process.

Policy PS-10.4 Require new and rehabilitated homes and structures to meet or exceed City fire prevention standards and state law, including building access, construction design, sprinklers, and others as required by Corona Fire.

Policy PS-10.5 Require all new commercial, industrial, institutional, multiple-unit housing, mixed-use, and one- and two-family dwelling developments to install fire protection systems and encourage the use of automatic sprinkler systems where not required by local codes and ordinances.

Policy PS-10.6 Require fuel modification plans and vegetation clearance standards for development in VHFHSZs to protect structures from wildfire, protect wildlands from structure fires, and provide safe access routes for the community and firefighters.

Policy PS-10.7 Condition approval of parcel maps and tentative maps in VHFHSZs based on meeting or exceeding the SRA Fire Safe Regulations and the fire hazard reduction around buildings and structures regulations.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-14
Policy PS-10.8 Coordinate with the Department of Water and Power to ensure that adequate water supply and flows are available for firefighting; where inadequate, ensure provision of off-site water supply and transport.

Policy PS-10.9 Continue to require visible premise identification and signage per Corona’s Premise Identification Guideline that meet or exceed SRA and CFC requirements.

4.9.6 THRESHOLDS OF SIGNIFICANCE
Based on the relevant CEQA Guidelines as currently implemented by the City, significant hazards and hazardous materials impacts would occur if the proposed Project or any Projectrelated component would:

Threshold HAZ-1 Create a significant hazard to the public or the environment through the routine transport, use, or disposal of hazardous materials? Threshold HAZ-2 Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment?
Threshold HAZ-3 Emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within one-quarter mile of an existing or proposed school?
Threshold HAZ-4 Be located on a site which is included on a list of hazardous materials sites compiled pursuant to Government Code § 65962.5 and, as a result, would it create a significant hazard to the public or the environment? Threshold HAZ-5 For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project result in a safety hazard or excessive noise for people residing or working in the project area?
Threshold HAZ-6 Impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan?
Threshold HAZ-7 Expose people or structures, either directly or indirectly, to a significant risk of loss, injury or death involving wildland fires? (SEE SEIR SECTION 4.20 - WILDFIRE)

METHODOLOGY
As indicated previously, a Phase I ESA Update was prepared addressing hazardous conditions on the proposed BPI Development (PAs 1, 2, 3) and future Estate Residential (PA 5) components of the Modified Project area. The purpose of ESA was to identify and evaluate actual and potential environmental conditions involving the subject site. It was not the purpose of this assessment to determine the degree or extent of contamination, if any, but rather the

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-15
potential for contamination. The scope of work performed therefore focused on general characterizations of environmental concerns based on reasonably ascertainable information and observations. The ESA was conducted in accordance with ASTM E 1527-13 and included the following tasks:
• A reconnaissance of the Site and surrounding properties to visually assess current utilization and indications of potential surface contamination. This was accomplished by driving the Site boundaries, and then traversing the Site until the entire Site had been surveyed.
• A reconnaissance of the surrounding area for approximately one-half mile was conducted, without entering the properties, making observations concerning property uses, conditions, and housekeeping.
• An environmental database report was obtained from a data service provider. This database report compiles and locates documented “hazardous waste” facilities within specific minimum search distances as defined by ASTM E 1527-13. If necessary, additional information on identified facilities was gathered by a file review at the appropriate federal, state, local, and/or tribal regulatory agency.

4.9.7 ENVIRONMENTAL IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Impacts
Would the
Modified
Project result
in new or
more severe
impacts
requiring
revisions to
the Prior
EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions
to the Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the
Modified Project
requiring
revisions to the
Prior EIR?
Would the
Modified
Project result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

HAZ-1 Create a significant hazard
to the public or the
environment through the
routine transport, use, or
disposal of hazardous
materials?
HAZ-2 Create a significant hazard
to the public or the
environment through
reasonably foreseeable
upset and accident
conditions involving the
release of hazardous
materials into the
environment?

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-16
HAZ-3 Emit hazardous emissions
or handle hazardous or
acutely hazardous
materials, substances, or
waste within one-quarter
mile of an existing or
proposed school?
HAZ-4 Be located on a site which
is included on a list of
hazardous materials sites
compiled pursuant to
Government Code §
65962.5 and, as a result,
would it create a
significant hazard to the
public or the environment?
HAZ-5 For a project located
within an airport land use
plan or, where such a plan
has not been adopted,
within two miles of a
public airport or public use
airport, would the project
result in a safety hazard or
excessive noise for people
residing or working in the
project area?
HAZ-6 Impair implementation of
or physically interfere with
an adopted emergency
response plan or
emergency evacuation
plan?
HAZ-7 Expose people or
structures, either directly
or indirectly, to a
significant risk of loss,
injury or death involving
wildland fires?

IMPACTS ASSOCIATED WITH THE MODIFIED PROJECT
Impact HAZ-1: Create a significant hazard to the public or the environment through the routine transport, use or disposal of hazardous materials? Impact HAZ-2: Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into the environment?

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-17
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

No changes in the location, size, or boundaries of the GRRSP Planning Area boundary have occurred since adoption of the GRRSP in 2001. As discussed in the Project Description, the Modified Project would modify the size and boundaries of the GRRSP, however minimally in the northern portion of the Project site. In addition, the eastern portion of the Modified Project has been slightly expanded to incorporate appropriate grading limits within the hilly terrain.

All fuels, solvents and other materials used during construction of each phase of the Modified Project would be required to comply with applicable standards and regulations related to hazardous materials and hazardous waste as discussed in the 2001 EIR. Nonetheless, development of the GRRSP as proposed for amendment would result in an incremental increase over existing conditions in the potential for accidental releases of hazardous materials during routine transportation and disposal of hazardous materials. All materials used during construction and operation would be required to comply with applicable standards and regulations related to hazardous waste as specified in the 2001 EIR and as currently regulated through existing procedures and therefore no new or substantially greater impacts would occur.

The Modified Project’s impacts associated with hazards from routine transport, use, or disposal of hazardous materials and from the release of hazardous materials from upset and accident conditions would be less than significant and no mitigation is required. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR This topic will not be evaluated further in this SEIR.

Mitigation Measure
No mitigation measures are required.

Impact HAZ-3: Emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within one-quarter mile of an existing or proposed school?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As noted in the Prior EIR, there were no schools within 0.25 mile of the Approved Project. No schools have been built within 0.25 mile of the Modified Project since approval of the Approved Project. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project as compared to the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-18
Impact HAZ-4: Be located on a site which is included on a list of hazardous materials sites compiled pursuant to Government Code Section 67962.5 and, as a result, would it create a significant hazard to the public or the environment?
The Modified Project would result in new or more severe impacts requiring revisions to the Prior EIR.

The ESA prepared to assess hazardous conditions affecting the BPI Development and ER portions of the Modified Project found these properties do not appear on the hazardous database reports obtained for the assessment. There is one adjacent facility to the northeast listed on the California Environmental Reporting System (CERS) Hazardous Waste, CERS TANKS, facility and Manifest Data (HAZNET), Underground Storage Tank (UST), and the Resource Conservation and Recovery Act (RCRA) NonGen databases. This facility is listed Kaykel Investments Properties DBA Green River 76 located at 4350 Green River Road. The CERS Hazardous Waste and TANKS have CERS descriptions listed as “Hazardous Waste Generator” and “Underground Storage Tank”, respectively. There are multiple violations described that have all been returned to compliance. The HAZNET listing lists the waste code as “aqueous solution with total organic residues less than 10 percent with the disposal method listed as “other recovery of reclamation for reuse including acid regeneration”. The UST database lists four tanks total. The RCRA Non-Gen database lists the classification as “nongenerator” with a description of “handler: non-generators do not presently generate hazardous waste” with no violations found. There are 24 additional facilities listed on the database report within the various search distances specified by ASTM E 1527-13. Due to the status listings, distances and/or locations (hydro-geologically down-or crossgradient), these facilities do not represent an environmental concern to the Site. Therefore, the ESA determined no evidence exists of a recognized environmental condition in connection with the subject Site. However, the ESA noted that prior to demolition of any of the existing Site structures, existing federal and state regulations require asbestos-containing materials (ACM) and lead-based paint (LBP) surveys be performed.

In addition, there is evidence of an environmental concern at the subject Site that is a common concern frequently found on properties with former historical agricultural use. The northern portion of the Site has historically been used for agricultural purposes from at least 1946 to at least 1953. Historically, some agricultural sites have utilized pesticides that are currently considered a health risk and no longer used and consideration should be given to performing limited site testing of near surface soils prior to site preparation and grading in order to test for elevated concentrations of these chemicals. This is significant impact requiring mitigation.

Implementation of new Mitigation Measure MM HAZ-1 would reduce the impact to less than significant.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-19
Overall, the Modified Project implemented under changed circumstances would result in new or more severe impacts requiring revisions to the Prior EIR.

Mitigation Measure
The Modified Project introduces the following Mitigation Measures further described in detail Section 4.9.10.
• MM HAZ-1
Impact HAZ-5: For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the project result in a safety hazard or excessive noise for people residing or working in the project area? Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

There are no public or private airports in the vicinity of the GRRSP Planning Area that would be affect or be affected by the Modified Project. Development of the Modified Project would not result in a safety hazard for people residing or working within the GRRSP Planning Area.

No new or substantially greater impacts would occur with implementation of the Modified Project. The Modified Project’s impacts regarding public and private airports are consistent with the impacts identified in the Prior EIR and the level of impact (no impact) remains unchanged. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project when compared to those identified in the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact HAZ-6: Impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The Modified Project would be designed, constructed, and maintained in accordance with applicable standards associated with vehicular and emergency access, which would ensure that access would be properly provided for adequate emergency access and evacuation to and from each phase of the Modified Project’s development. Access to the BPI Development site would be provided to and from Green River Road via Street “A” and emergency vehicle access would be provided via a driveway on Dominguez Ranch Road. Traffic from all of the Modified Project would not use Fresno Road for site access. Construction activities that could

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-20
temporarily restrict vehicular traffic on public roadways would be required to implement a Traffic Management Plan as part of building permit approval to ensure adequate access is maintained. Compliance with existing regulations for emergency access and evacuation would ensure impacts related to emergency access and response is less than significant and no mitigation is required.

Members of the public expressed concerns regarding the Modified Project’s potential to further limit the ability for emergency response vehiclesto travel along Green River Road, Dominguez Ranch Road, and other roadways in the vicinity when responding to calls during congested weekday a.m. and p.m. peak commute periods. These concerns were expressed at the public scoping meeting held at City Hall on September 22, 2022 and in letter/email form in response to the Notice of Preparation distributed for review August 29, 2022 through September 28, 2022. The following analysis addresses these concerns.

At the time the 2001 EIR was prepared, the area currently proposed for BPI land uses in revised PAs 1, 2, and 3 was planned for Mixed-Use (MU) land uses as shown in the existing GRRSP.

Because this MU land use category allows a wide range of land use types, analysis of impacts was conducted based on development of retail shopping uses. These uses entail the highest trip generation potential and therefore was used in the analysis assumptions of the Approved Project in the 2001 EIR in order to ensure impacts associated with air quality, noise and traffic were adequately assesses and not underestimated. Section 4.2 of the 2001 EIR estimated trip generation for the Approved Project to be 11,207 trips per day with 913 occurring during the a.m. peak hour and 965 occurring during the p.m. peak hour. As identified in Section 4.17 of this SEIR, trip generation for the Modified Project is estimated to be 4,370 trips per day with 429 occurring during the a.m. peak hour and 386 occurring during the p.m. peak hour. Table

4.9.A summaries the trip generation estimates contained in the 2001 EIR for the Approved Project and in Section 4.17 of this SEIR for the Modified Project.

Table 4.9-1: Trip Generation Comparison Approved Project vs. Modified Project Estimate Daily
Trip Generation
A.M. Peak Hour
Trip Generation
P.M. Peak Hour
Trip Generation
Approved Project 11,207 913 965
Modified Project 4,370 429 386
Trip Reduction
(Percent Decrease)
6,837
(61.0%)
484
(53.0%)
579
(60.0%)
Source: Urban Crossroads (Appendix P)
As shown in Table 4.9.A, the Modified Project would result in a substantially reduced trip generation in comparison to the Approved Project. On a daily basis the Modified Project would generate approximately 61% fewer trips per day, approximately 53% fewer trips in the a.m.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-21
peak commute hour, approximately 60% fewer trips in the p.m. peak commute hour Approved Project.

Traffic conditions at the time the 2001 EIR was approved were similarly congested as they are currently. Although improvements to SR-91 and Green River Road have been constructed and completed, regional population growth has outpaced these improvements and traffic congestion persists. Nonetheless, this congestion is an existing condition not created by the Modified Project and traffic congestions is no longer used as the definition of a traffic impact.

For these reasons and based on the substantially reduced quantity of trips estimated for the Modified Project in comparison to the Approved Project, it reasonable to conclude the Modified Project’s impacts associated with physical interference with an adopted emergency response plan are consistent with the impacts identified in the Prior EIR and the level of impact (less than significant) remains unchanged. Therefore, no new or substantially greater impacts would occur with implementation of the Modified Project as compared to the 2001 EIR for the Approved Project.

Mitigation Measure
No mitigation measures are required.

Impact HAZ-7: Expose people or structures, either directly or indirectly, to a significant risk of loss, injury or death involving wildland fires? See Section 4.20 of this SEIR for a detailed analysis of the Wildfire topic is currently required under CEQA.

4.9.8 CUMULATIVE IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Less Than Significant Impact/No Changes or No New Information Requiring Preparation of an EIR.

Project-specific hazardous material impacts resulting from individual future development projects will be mitigated via application of applicable regulations or addressed separately in future CEQA documents. Anticipated future development will contribute through increases in population and the number of outlets that transport or dispose of hazardous materials, to a cumulative increase in risk for hazardous material incidents. Although each project has unique hazardous materials considerations, future cumulative projects would comply with the local, State, and Federal regulations and requirements as these are required for all development projects. As a result, cumulative impacts associated with hazardous materials would be less than significant.

Cumulative aircraft hazard impacts consist of future development within the boundaries of applicable Airport Land Use Plan (ALUP) accident potential zones. The risk to or from each

CITY OF CORONA
SEPTEMBER 202 4

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HAZARDS AND HAZARDOUS MATERIALS

ENPLANNERS

4.9-22
future project is based on the specific accident potential zone. The risks associated with development in these accident potential zones can only be reduced through conformance with land use guidelines and policies identified by the ALUP. Because the surrounding cities as well as the County of Riverside have implemented comprehensive land use plans that incorporate applicable ALUP recommendations, it is anticipated cumulative development within the accident potential zones would in a less than significant cumulative impact associated with aircraft accident hazards.

Similar to the conclusions for the Approved Project contained in the 2001 EIR, the Modified Project would be required to comply with local, State, and Federal regulations and requirements related to hazardous materials. With adherence to these measures, the Modified Project’s impacts would not be cumulatively considerable. Therefore, the Modified Project would not result in a change in cumulative impacts that would require further analysis and the level of impact would remain the same as can be inferred from the time the 2001 EIR was certified.

4.9.9 MITIGATION MEASURES IDENTIFIED IN PRIOR EIR APPLICABLE TO

MODIFIED PROJECT
No mitigation measures related to hazards and hazardous materials were included in the 2001 EIR.

4.9.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT MM HAZ-1: Prior to issuance of a demolition permit for each phase of development requiring demolition and removal of onsite structures, the Project applicant shall provide documentation to the City of Corona Building Division demonstrating that the improvements and/or buildings subject to a demolition permit application include survey testing for asbestos-containing materials (ACM) and lead-based paints (LBP) in accordance with existing federal and state regulations.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-1

4.10 HYDROLOGY AND WATER QUALITY

4.10.1 INTRODUCTION
This section provides an overview of the existing hydrology and water quality within the GRRSP Planning Area and surrounding region, a summary of applicable regulations, and analyses of potential short-term and long-term hydrology and water quality impacts from implementation of the Modified Project. Mitigation measures are recommended as necessary to reduce significant impacts. No NOP comment letters, or Scoping Meeting comments were received pertaining to this topic.

This section of the Draft SEIR is based on the Preliminary Drainage Report (Drainage Report), prepared by KWC Engineers dated December 2022 (Appendix K-1), and the Project Specific Water Quality Management Plan (WQMP), Revised December 12, 2022, KWC Engineers (Appendix K-2).

4.10.2 SUMMARY OF IMPACTS AND MITIGIATION MEASURES FROM THE 2001 EIR
The 2001 EIR screened out impacts associated with ground water quality and quantity, and ground water flow as a less than significant impact was determined. All further impacts were analyzed in detail 2001 EIR.

The Approved Project impact analysis related to water quality as presented in the 2001 EIR as well as any mitigation measures identified to reduce significant impacts are summarized as follows:
a) Substantial degradation of water quality.

The 2001 EIR determined, adherence to applicable standards, permits, regulations, and/or clearances of the Corps, the RWQCB, and the CDFG, as included in mitigation measures MM

4.11.1A and 4.11.1B, potential impacts related to water quality to a less than significant level.

The 2001 included MM 4.11.1A which required the Project applicant to obtain all permits and clearances from the Corps, the RWQCB, and the CDFG prior to the disturbance of any existing drainage. In addition, the 2001 EIR included MM 4.11.1B of which the Approved Project’s drainage facilities within engineered slopes/fills shall be designed and installed in accordance with the City of Corona standards. Furthermore, 2001 EIR determined wetlands are absent from the Approved Project site. Impacts were determined to be less than significant with implementation of mitigation.
b) Substantial degradation or depletion of groundwater resources.

The 2001 EIR determined with implementation of mitigation potential impacts associated with any increase in the amount of surface runoff would be reduced to less significant levels. The

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-2
2001 stated the Approved Project involves significant alterations to the existing topography and drainage of the site, including the installation of impermeable surfaces that will increase surface flows and the current drainage structures may be insufficient to handle the increased flows (including 100-year storm) resulting from the Approved Project. With adherence to mitigation measure MM 4.11.2A and 4.11.2B, the 2001 EIR determined the Approved Project’s storm drain plan would maintain natural drainage patterns and handle the increased flows, ultimately reducing the volume of downstream storm flows to a level manageable by the existing culverts.
c) Substantial flooding, erosion, or siltation.

The 2001 determined with implementation of mitigation potential impacts associated with erosion and sedimentation were reduced to less than significant level. The 2001 EIR stated the Approved Project will require the substantial modification of existing on-site slopes and/or construction of manufactured slopes. In addition, exposed cuts/slopes will be prone to erosion, which may affect the quality/quantity of surface runoff. As a result, the 2001 EIR required the implementation of mitigation measures MM 4.11.3A through 4.11.3D to reduce the temporary construction or longterm impacts associated with final development to a less than significant level.
d) Substantial change of existing flowpaths, substantial redirection of storm runoff, or realignment of flood control channel.

Implementation of the Approved Project was determined in the 2001 EIR to increase the amount of impermeable surfaces on site. In addition the Approved Project runoff will contain pollutants typically associated with urban use, such as oil and rubber residues, fertilizers, pesticides, detergents and hydrocarbon particles which may incrementally degrade surface water quality downstream of the Project site, therefore requiring mitigation. The 2001 EIR required the installation of “stormceptors” (MM 4.11.4A) and adherence to applicable standards of the Santa Ana RWQCB (MM 4.11.4B) would reduce potential impacts associated with this issue to a less than significant level. The 2001 EIR determined with implementation of mitigation measures MM 4.11.4A and MM 4.11.4B the Approved Project’s drainage system will be designed, installed, and maintained in such a manner as to reduce potential impacts to water quality to a less than significant level.

Cumulative Impacts
The 2001 EIR stated the cumulative development will have an impact on regional flooding due to the increase in impervious ground cover and urban runoff associated with increased development. As such, the 2001 EIR determined the Approved Project would contribute to regional runoff; however, the Approved drainage plan for the GRRSP area is intended to manage and regulate potential flooding and downstream impacts to soils, vegetation or other development. In addition, other projects at that time in the City and/or County must also

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-3
comply with the applicable General Plan Policies for drainage improvements. Furthermore the 2001 EIR determined, review of flood control facilities/plans for other projects in the vicinity can serve to mitigate additional downstream flooding impacts and regional flood control planning such as that conducted by the Corps can serve to further mitigate cumulative impacts related to flooding. The 2001 EIR determined, with implementation of mitigation measures

4.11.1 through 4.11.4, cumulative impacts would be mitigated to a less than significant level.

4.10.3 ENIVRIONMENTAL SETTING
Regional Drainage
As previously stated, the City resides within the regional Santa Ana River Watershed, a flood control zone monitored by the Santa Ana RWQCB that covers portions of the Counties of Riverside, Orange, and San Bernardino. Within Riverside County, this regional watershed is subdivided into the Santa Ana Sub-watershed (of which the City lies within) and the San Jacinto River Sub-watershed. The Santa Ana Sub-watershed consists of the Santa Ana River and its tributaries and the San Jacinto River Sub-watershed includes the San Jacinto River and its tributaries that overflow into the Santa Ana River only in high volume storm events.

Ultimately, all channels converge with the Santa Ana River where downstream ends of the channel travel through Orange County prior to emptying into the Pacific Ocean.

Local Surface Waters
The Santa Ana Sub-watershed is also further subdivided into smaller sub-watersheds based on major tributary channels that feed into the Santa Ana River. The City lies within two of these smaller sub-watersheds: the Middle Santa Ana River Sub-watershed and the Temescal Wash Sub-watershed. The Middle Santa Ana River Sub-watershed is located in the northwest corner of Riverside County and covers a total tributary area of 170 square miles that generally drains westwards towards the Santa Ana River. Tributaries to this sub-watershed include: Temescal Creek, Tequesquite Arroyo (Sycamore Creek), Day Creek, and San Sevaine Creek. The Temescal Sub-watershed covers 250 square miles and is defined as the tributary area draining into the Temescal Wash, also known as Temescal Creek, that connects Lake Elsinore with the Santa Ana River.

Tributaries to the Temescal Wash include Wasson Canyon Wash, Arroyo Del Toro, Stovepipe Canyon Wash, Rice Canyon Wash, and Lee Lake. A majority of Corona lies within this subwatershed, and the drainage channels that run through the City that tie into the Temescal Wash include Arlington Channel, Main Street Channel, Oak Street Drain, Joseph Canyon Wash, and Bedford Wash.

Existing Drainage
The GRRSP Planning Area is approximately 160 acres of vacant land situated in the hills to the northeast of the City of Corona adjacent to Green River Road. The Modified Project site is

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-4
generally bounded to the north and east by the vacant land and SR 91 and SR 71, to the south by hillside, and to the west by vacant land/commercial.

The GRRSP Planning area consists of sparsely vegetated and otherwise undeveloped land with the exception of dirt roads. The Modified Project site is characterized by flat topography with hillside on the south which introduces offsite flow into the site. The hill side to the south is characterized by steep topography, generally increasing in elevation from the south to the north. Small ravines are present which convey the natural drainage across the Project site.

4.10.4 EXISITING REGULATIONS, PLANS, PROGRAMS, AND POLICIES

FEDERAL REGULATIONS
Clean Water Act
The Clean Water Act (CWA) established the basic structure for regulating discharges of pollutants into "waters of the U.S." The Act specifies a variety of regulatory and non-regulatory tools to sharply reduce direct pollutant discharges into waterways, finance municipal wastewater treatment facilities, and manage polluted runoff. Key components of the Clean Water Act that are relevant to the proposed Project are:
• Sections 303 and 304, which provide for water quality standards, criteria, and guidelines. Section 303(d) requires the state to develop lists of water bodies that do not attain water quality objectives (are impaired) after implementation of required levels of treatment by point-source dischargers(municipalities and industries). Section 303(d) also requires that the state develop Total Maximum Daily Loads {TMDLs) for each of the listed pollutants. The TMDL is the amount of pollutant loading that the water body can receive and still be in compliance with water quality objectives. After implementation of the TMDL, it is anticipated that the contamination that led to the 303(d) listing would be remediated. Preparation and management of the Section 303(d) list is administered by the Regional Water Quality Control Boards (RWQCBs). • Section 401 requires activities that may result in a discharge to a federal water body to obtain a water quality certification to ensure that the proposed activity would comply with applicable water quality standards.
• Section 402 regulates point- and nonpoint-source discharges to surface waters through the National Pollutant Discharge Elimination System (NPDES) program. In California, the State Water Resources Control Board (SWRCB) oversees the NPDES program, which is administered by the local RWQCBs. The NPDES program provides both general permits {those that cover a number of similar or related activities) and individual permits.

National Pollutant Discharge Elimination System Permit Program

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-5
The NPDES permit program under the CWA controls water pollution by regulating point- and nonpoint sources that discharge pollutants into "waters of the U.S." California has an approved state NPDES program. The United States Environmental Protection Agency has delegated authority for NPDES permitting to the SWRCB, which has nine regional boards. The Santa Ana RWQCB regulates water quality in the Bloomington area. Discharge of stormwater runoff from construction areas of one acre or more requires either an individual permit issued by the RWQCB or coverage under the statewide Construction General Stormwater Permit for stormwater discharges (discussed below). Specific industries and public facilities, including wastewater treatment plants that have direct stormwater discharges to navigable waters, are also required to obtain either an individual permit or obtain coverage under the statewide General Industrial Stormwater Permit.

STATE REGULATIONS
Porter-Cologne Act
The Porter-Cologne Water Quality Control Act of 1969, codified as Division 7 of the California Water Code, authorizes the SWRCB to provide comprehensive protection for California's waters through water allocation and water quality protection. The SWRCB implements the requirement of CWA Section 303, establishing that water quality standards have to be set for certain waters by adopting water quality control plans under the PorterCologne Act. The Porter-Cologne Act establishes the responsibilities and authorities of the nine RWQCBs, including preparing water quality plans for areas in the region, and identifying water quality objectives and waste discharge requirements (WDRs). Water quality objectives are defined as limits or levels of water quality constituents and characteristics established for reasonable protection of beneficial uses or prevention of nuisance. Beneficial uses consist of all the various ways that water can be used for the benefit of people and/or wildlife. The PorterCologne Act has been amended to provide the authority delegated from the USEPA to issue NPDES permits regulating discharges to surface waters of the U.S.

The unincorporated community of Bloomington is in the Santa Ana River Basin, Region 8, in the Upper Santa Ana Watershed. The Water Quality Control Plan for this region was adopted in 1995. This Basin Plan gives direction on the beneficial uses of the state waters within Region 8, describes the water quality that must be maintained to support such uses, and provides programs, projects, and other actions necessary to achieve the established standards.

California Anti-Degradation Policy
A key policy of California's water quality program is the State's Anti-Degradation Policy. This policy, formally known as the Statement of Policy with Respect to Maintaining High Quality Waters in California (SWRCB Resolution No. 68-16), restricts degradation of surface and ground waters. In particular, this policy protects water bodies where existing quality is higher than necessary for the protection of beneficial uses.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-6
Under the Anti-Degradation Policy, any actions that can adversely affect water quality in all surface and ground waters must (1) be consistent with maximum benefit to the people of the state; (2) not unreasonably affect present and anticipated beneficial use of the water; and (3) not result in water quality less than that prescribed in water quality plans and policies (i.e., will not result in exceedances of water quality objectives).

California Construction General Permit
The State of California adopted a Statewide NPDES Permit for General Construction Activity (Construction General Permit) on September 2, 2009 (Order No. 2009-0009-DWQ, as amended by 2010-0014-DWQ and 2012-0006-DWQ). The last Construction General Permit amendment became effective on July 17, 2012. The Construction General Permit regulates construction site stormwater management. Dischargers whose projects disturb one or more acres of soil, or whose projects disturb less than one acre, but are part of a larger common plan of development that in total disturbs one or more acres, are required to obtain coverage under the General Permit for discharges of stormwater associated with construction activity.

Construction activity subject to this permit includes clearing, grading, and disturbances to the ground, such as stockpiling or excavation, but does not include regular maintenance activities performed to restore the original line, grade, or capacity of the facility.

To obtain coverage under this permit, project operators must electronically file Permit Registration Documents, which include a Notice of Intent (NOI), a Stormwater Pollution Prevention Plan (SWPPP), and other compliance-related documents, including a risk-level assessment for construction sites, an active stormwater effluent monitoring and reporting program during construction, rain event action plans, and numeric action levels (NALs) for pH and turbidity, as well as requirements for qualified professionals to prepare and implement the plan.

The SWPPP would include a site map, description of stormwater discharge activities, and best management practices (BMPs) taken from the menu of BMPs set forth in the California Stormwater Quality Association (CASQA) BMP Handbook that will be employed to prevent water pollution. It must describe BMPs that will be used to control soil erosion and discharges of other construction-related pollutants (e.g., petroleum products, solvents, paints, cement) that could contaminate nearby water bodies. It must demonstrate compliance with local and regional erosion and sediment control standards, identify responsible parties, provide a detailed construction timeline, and implement a BMP monitoring and maintenance schedule. The Construction General Permit requires the SWPPP to identify BMPs that will be implemented to reduce controlling potential chemical contaminants from impacting water quality. Types of BMPs include erosion control (e.g., preservation of vegetation), sediment control (e.g., fiber rolls), non-stormwater management (e.g., water conservation), and waste management. The SWPPP also includes descriptions of BMPs to reduce pollutants in stormwater discharges after all construction phases have been completed at the site (postconstruction BMPs).

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-7
California Water Resources Control Board Low Impact Development Policy The SWRCB adopted the Low Impact Development (LID) Policy which, at its core, promotes the idea of "sustainability" as a key parameter to be prioritized during the design and planning process for future development. The SWRCB has directed its staff to consider sustainability in all future policies, guidelines, and regulatory actions. LID is a proven approach to manage stormwater. The RWQCBs are advancing LID in California in various ways, including provisions for LID requirements in renewed NPDES Phase I Municipal Separate Storm Sewer System (MS4) permit.

REGIONAL REGULATIONS
Santa Ana Regional Water Quality Control Board Water Quality Control Plan (Basin Plan)
The City of Corona falls under the jurisdiction of the Santa Ana Regional Water Quality Control Board (RWQCB), which establishes water quality standards for both ground and surface waters in its area through the implementation of a Water Quality Control Plan (Basin Plan). This plan outlines existing water quality conditions, sets goals and policies, and serves as the foundation for regulatory programs. It defines water quality standards in terms of the beneficial uses of water bodies and the required levels of quality to protect those uses, as outlined in the federal Clean Water Act (CWA). Each RWQCB is mandated to adopt a Basin Plan that reflects regional water quality differences, beneficial uses of water, and local conditions and issues. Corona, situated in the Upper Santa Ana Watershed of the Santa Ana River Basin (Region 8), adheres to the Water Quality Control Plan for Region 8, established in 1995. This plan delineates beneficial uses, specifies required water quality levels, and outlines necessary programs, projects, and actions to achieve Basin Plan standards.

County of Riverside MS4 Permit
In January 2010, the Santa Ana RWQCB re-issued the Riverside County MS4 Storm Water Permit as Waste Discharge Requirement (WDR) Order R8-2010-0033 (NPDES Permit No.

CAS618033) to the County of Riverside, the incorporated cities of Riverside County, and the Riverside County Flood Control and Water Conservation District within the Santa Ana Region.

Pursuant to the 2010 MS4 Permit, the Co-permittees were required to update and implement a Drainage Area Management Plan (DAMP) for its jurisdiction, as well as Local Implementation Plans (LIPs), which describe the Co-permittees’ urban runoff management programs for their local jurisdictions.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-8

LOCAL REGULATIONS
City of Corona Local Implementation Plan
Under the City’s Local Implementation Plan (LIP), land development policies pertaining to hydromodification and low impact development (LID) are regulated for new developments and significant redevelopment projects. The use of LID Best Management Practices (BMPs) in project planning and design is to preserve a site’s predevelopment hydrology by minimizing the loss of natural hydrologic processes such as infiltration, evapotranspiration, and runoff detention. These land development requirements are detailed in the County-wide Model Water Quality Management Plan (WQMP) and Technical Guidance Document (TGD), approved in May 2011, which cities have incorporated into their discretionary approval processes for new development and redevelopment projects. Within the City’s built out system, all runoff ultimately discharges into fully engineered concrete flood control channels. Based on this drainage collection system, projects within the City of Corona are not subject to the hydromodification requirements.

Projects are required to comply with the LID requirements in accordance with the LID hierarchy. The LID hierarchy requires new developments and re-developments to implement BMPs under the LID hierarchy as described in the TGD. The LID hierarchy requires new projects to first infiltrate, then harvest and reuse, then biofilter stormwater runoff from their project site. In the City of Corona, infiltration will likely be incorporated for new projects within the central and southern portions of the City as it is comprised of mostly Type A and B soils which typically have high infiltration rates. Groundwater levels throughout the City ranges from 45 feet to 80 feet below ground level which is also beneficial for infiltration BMP implementation. The eastern and western portions of the City are comprised of mostly Type C & D soils and will likely need infiltration testing to confirm infiltration feasibility. In areas where infiltration is determined to be infeasible, harvest and reuse BMPs may prove feasible for projects that incorporate ample landscaping and/or have high indoor toilet flushing demands (i.e. hotels). For areas that cannot infiltrate or utilize harvest and reuse systems, projects will be able to biofilter stormwater through biofiltration BMPs such as vegetated swales and bioretention basins.

Corona Groundwater Management Plan
A Groundwater Management Plan (GWMP) was prepared for the City of Corona in June 2008.

The City of Corona is the water service provider for its constituents, and the GWMP was adopted in accordance with Assembly Bill 3030 to address management for groundwater supply and quality to sustain beneficial uses. The GWMP covers the three groundwater basins that cover the City, including Temescal, Coldwater, and Bedford Basins. The two latter basins (Coldwater and Bedford Basins) make up a portion of the larger Elsinore Basin. Currently, coordinated efforts are required to manage the Coldwater and Bedford Basins between the various agencies with jurisdiction over the area. These agencies that manage the Coldwater

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-9
and Bedford Basins include the City of Corona, the Temescal Valley Water District (TVWD), while Elsinore Valley Municipal Water District (EVMWD) manages the remainder of the Elsinore Basin outside of the Coldwater and Bedford Basins.

Successful implementation of the Groundwater Management Plan also requires coordinated efforts between local jurisdictions and statewide monitoring of California’s groundwater basins. The California Department of Water Resources (DWR) manages the California Statewide Groundwater Elevation Monitoring program which tracks the health and groundwater-level elevations of California’s 515 different basins and how to best manage these basins. It also publishes a list of basin prioritization to determine how resources should be allocated to manage various groundwater basins, with the majority of resources directed towards basins with medium and high priority.

City of Corona Municipal Code
The City’s Municipal Code addresses hydrology and water quality issues through Chapter

13.27, Stormwater Management and Discharge Controls. The purpose of this chapter is to protect the future health, safety and general welfare of the city’s citizens by:
1) Reducing pollutants in storm water discharges to the maximum extent practicable; 2) Regulating illicit connections and discharges to the storm drain system; and 3) Regulating non-storm water discharges to the storm drain system.

The enforcement of this chapter is intended to protect and enhance the water quality of city watercourses, water bodies, groundwater, and wetlands in a manner consistent with the Federal Clean Water Act.

The Municipal Code addresses floodplain issues through Title 18, Floodplain Management.

The purpose of this title is to promote the public health, safety and general welfare and to minimize public and private losses due to flood conditions in specific areas. In order to accomplish its purposes, this title includes provisions for: 1) Restricting or prohibiting uses which are dangerous to health, safety and property due to water or erosion hazards or which result in damaging increases in erosion or in flood heights or velocities; 2) Requiring that uses vulnerable to floods, including facilities which serve such uses, be protected against flood damage at the time of initial construction; 3) Controlling the alteration of natural flood plains, stream channels and natural protective barriers which help accommodate or channel flood waters; 4) Controlling filling, grading, dredging and other development which may increase flood damage; and 5) Preventing or regulating the construction of flood barriers which will unnaturally divert flood waters or which may increase flood hazards in other areas.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-10
City of Corona 2020–2040 General Plan
Land Use Element
Policy LU-1.4 Accommodate the types, densities, and mix of land uses that can be adequately supported by transportation and utility infrastructure (water, sewer, etc.) and public services (schools, parks, libraries, etc.) Policy LU-1.5 Accommodate land use development in balance with the preservation and conservation of open spaces for recreation, aesthetic relief, natural resource value, and public safety (such as floodways, seismic fault zones, and other).

Policy LU-6.1 Promote sustainable features in new construction and significant renovations, including the use of locally sourced, recycled, and sustainable-sourced building materials, energy- and water-efficient building design, integrated renewable energy and energy storage systems, and waste minimization during construction.

Policy LU-6.2 Require that new residential, commercial, office, and industrial development be designed to minimize consumption of and sustain scarce environmental resources through:
• Site design—concentration and intermixing of development to minimize vehicular trips and promote walking and building orientation for solar access and heat gain and loss
• Landscaping—drought-tolerant species, use of recycled water for irrigation, and other purposes
• Capture of rainwater and re-use on site
• Building design and construction materials—energy and water efficient fixtures, recycled building materials, insulation and wall thickness, permeable paving surfaces, and comparable techniques Policy LU-15.7 Strive to incorporate best practices in sustainability (including water conservation, energy conservation, groundwater filtration, and other similar techniques) into the design and development of public and institutional buildings.

Policy LU-16.1 Accommodate open spaces that can be used for recreation and conserved to protect significant plant and animal habitats and population from the risks of flood, fire, and seismic hazards in accordance with the designations of the land use plan.

Policy LU-16.2 Require the dedication of additional open spaces in new residential subdivisions and other applicable development, where necessary, to preserve the natural topography, plant and animal habitats, and flooding and drainage corridors in accordance with subsequent policies of this plan.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-11
Policy LU-20.6 Locate and design development to complement and assure its compatibility with the potential Metropolitan Water District (MWD) water treatment facility, if developed.

Housing Element (2021-2029)
Policy H-1.4 Support the development of sustainable projects that reduce demand for water and energy resources, reduce commute times and operational costs, and provide for transit-oriented development.

Community Design
Policy CD-4.2 New development adjoining open spaces, washes or have the ability to provide pedestrian connections to off-site trails or pathways should be designed to ensure landscape transitions and compatibility with these resources. Such improvements should be designed to provide adequate flood protection for adjoining properties.

Infrastructure and Utilities Element
Policy IU-1.1 Review, evaluate, and update the City’s Urban Water Management Plan and related capital improvement programs on a regular basis in order to maintain plans for expansion and improvement of distribution and storage facilities.

Policy IU-1.2 Evaluate the adequacy of water infrastructure in areas where intensification of land use is anticipated; coordinate capital improvements planning for all municipal water service infrastructure with the direction, extent, and timing of growth.

Policy IU-1.3 Construct, upgrade, maintain, and expand water supply, distribution, pumping, storage, and treatment facilities in the Urban Water Management Plan and/or as required to meet state and federalstandards.

Policy IU-1.4 Designate, preserve, and acquire land, if necessary, for siting future water supply, storage, and distribution facilities in conformity with the goals and policies of the Land Use Element.

Policy IU-1.5 As a condition of permit approval, require adequate water supply, distribution, pumping, storage, and treatment facilities to be operational prior to the issuance of building permits.

Policy IU-1.6 Achieve and maintain compliance with all federal, state, and local regulatory standards for drinking water to protect the health, safety, and welfare of Corona.

Policy IU-1.7 Require all new development to be served from an approved domestic water supply to protect the health and safety of the public and groundwater supplies.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-12
Policy IU-1.8 Through engineering design, construction practices, and enforcement of water regulatory standards, ensure that existing and new land uses and development do not degrade the City’s surface waters and groundwater supplies.

Policy IU-1.9 Require the costs of improvements to the water supply transmission, distribution, pumping, storage, and treatment facilities necessitated by new development be equitably borne by beneficiaries, either through the payment of fees, or construction of the improvements.

Policy IU-2.1 Continue to implement the City’s water conservation and reuse efforts; review these programs regularly, and modify them as appropriate and feasible.

Policy IU-2.2 Establish guidelines and standards for water conservation and actively promote use of water conserving devices and practices in new construction, major alterations and additions to existing buildings, and retrofitting of irrigation systems where feasible.

Policy IU-2.3 Require incorporation of best available technologies for water conservation, internally and externally, in new construction and associated site design.

Policy IU-2.4 Expand the recycled water program to provide water for landscaped medians and other appropriate open spaces along SR-91 and I-15, in coordination with Caltrans when feasible.

Policy IU-2.5 Require that sewer flows be minimized in existing and future developments through water conservation and recycling efforts.

Policy IU-2.6 Encourage the use of recycled water by industrial, commercial, and institutional users through the use of incentives such as differential pricing; require recycled water use for landscaped irrigation, grading, and other noncontact uses in new projects, where feasible.

Policy IU-2.7 Require the use of recycled water for landscaped irrigation, grading, and other noncontact uses in new developments, parks, golf courses, sports fields, and comparable uses, where feasible.

Policy IU-2.8 Continue to provide and support public educational efforts to residents, business, and students regarding the importance of water conservation and recycled water use.

Policy IU-2.9 Require that grading plans be designed and implemented to reduce stormwater runoff by capturing rainwater onsite and storing on a temporary, short-term basis to facilitate groundwater recharge rather than relying solely on community drainage facilities.

Policy IU-2.10 Require the use of rainwater capture and storage facilities, techniques, and improvements in residential and nonresidential developments to further objectives for water conservation.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-13
Policy IU-3.9 Continue to require all applicable industries/businesses to obtain sewer discharge permits from the City and to comply with the City's Waste Discharge Pretreatment and Source Control Program.

Policy IU-3.10 Continue to implement, as appropriate, the requirements of the NPDES and SCAQMD regulations, including requiring the use of Best Management Practices by businesses in the City.

Policy IU-4.1 Review, evaluate, and regularly update the City’s Storm Drainage Master Plan and related capital improvement programs as a basis for the orderly planning, expansion, and improvement of facilities; implement improvements identified in the Drainage Master Plan.

Policy IU-4.2 Maintain and upgrade public storm drains and storage control facilities and construct or expand storm drain and flood control facilities to protect people and property from flooding and stormwater runoff.

Implement improvements identified in the City’s Drainage Master Plan.

Policy IU-4.3 Designate, preserve, and acquire land, as necessary, for storm drainage and storage control facilities. As necessary, require the reservation of rights-of-way and easements for designated water related infrastructure facilities as a condition of project approval.

Policy IU-4.4 Evaluate the adequacy of stormwater conveyance and storage control facilities in area where intensification of land use is anticipated to occur; coordinate capital improvements planning for infrastructure with the direction, extent, and timing of growth.

Policy IU-4.5 Review development proposals for projects within the City’s Sphere of Influence and encourage Riverside County to not approve any project that cannot be accommodated with an adequate drainage system.

Policy IU-4.6 Annually review the development charge, acquisition of service charge, and monthly service charges in order to ensure that adequate fees and charges are collected to fund the operation, maintenance, and repair of existing facilities and construction of new facilities.

Policy IU-4.7 Require adherence to City regulatory stormwater quality measures and, if needed, take necessary enforcement action(s) to eliminate illicit connections and discharges to/from the stormwater system.

Policy IU-5.1 Ensure that existing and new development does not directly degrade or indirectly contribute to the degradation of surface waters or the groundwater system.

Policy IU-5.2 Reduce pollutant loading through passive treatment systems such as vegetated filter strips, grass swales, and infiltration/ sedimentation areas in suitable open space areas, overland flow channels, and landscaping adjacent to parking lots and streets.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-14
Policy IU-5.3 In new developments, minimize the amount of impervious area that is directly connected to piped or channelized drainage systems.

Policy IU-5.4 Evaluate any existing environmental degradation or potential degradation from current or planned storm drain and storage control facilities in wetlands or other sensitive environments.

Policy IU-5.5 Require that development projects consider the appropriateness of the channelization of stormwater runoff to facilitate its possible capture and reuse for on-site irrigation and other purposes.

Policy IU-5.6 Implement environmentally and economically efficient stormwater treatment systems, whenever practical (such as artificial marshland sewer treatment).

Policy IU-5.7 Require developers to obtain a NPDES permit prior to moving construction equipment onto a development site. The NPDES permit shall be retained at the construction site throughout the construction period, and a copy shall be filed with the City Engineer.

Policy IU-5.8 During construction projects, ensure compliance with all terms and conditions outlined in the NPDES permit, including the implementation of the latest best management practices and determination of need for any additional water quality management plans to reduce pollutants and urban runoff flows to the maximum extent practicable.

Policy IU-5.9 Require that new developments employ the most efficient drainage technology to control drainage and minimize damage to
environmentally sensitive areas.

Policy IU-5.10 Require that individual project owners and operators handle, store, apply, and dispose of all pest control, herbicide, insecticide, and other similar substances according to all federal, state, and local regulations.

Public Safety Element
Policy PS-2.1 Maintain and continuously update the City’s floodplain safety hazards maps and dam inundation maps in concert with FEMA map
amendments, improvements to local drainage facilities, and updated flood studies from individual projects or the State of California.

Policy PS-2.2 Evaluate, on a project-by-project basis, whether new development should be located in a flood hazard zone and identify and require construction methods or other appropriate methods to minimize the risks of damage for projects located in flood zones.

Policy PS-2.3 Require adherence to the California Building Code, Municipal Codes, FEMA flood control guidelines, and Corona Floodplain Management Ordinance for the purposes of avoiding or minimizing the risk of damages to structures, injury, or loss of life.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-15
Policy PS-2.4 Locate, when feasible, new essential public facilities outside of flood zones; for those that must remain or are built in flood hazard zones, harden structures to maintain the structural and operational integrity of such public facilities in case of flooding.

Policy PS-2.5 Identify vulnerable structures, infrastructure, and utilities in areas of special flood hazards and encourage the retrofit or upgrade of such structures and infrastructure to minimize damages and reduce the risk or injury or death from flooding.

Policy PS-2.6 Prohibit the alteration of natural floodplains or improved drainage areas or the allowance of encroachments by structures without determination by the Floodplain Administrator that such actions will not be detrimental to public health and safety.

Policy PS-2.7 Establish and maintain cooperative working relationships among public agencies with responsibility for flood protection, including Riverside County Flood Control District, County Public Works, neighboring jurisdictions, and other entities.

Healthy Community Element
Policy HC-2.3 Prioritize local and regional efforts, in cooperation with regional agencies, to remediate or treat contaminated surface water, groundwater, or soils to state and federal standards, and ensure that drinking water is safe and healthful to meet all local, state, and federal health standards
Policy HC-2.7 Keep up to date on new and amended regulations issued by state and federal regulatory agencies with respect to air, water, and other pollutants and permissible exposure; revise local ordinances and development requirements as needed to reduce exposure to pollution.

Policy HC-5.4 Establish agreements with partner agencies to provide public facilities, services, and amenities within the city. This includes public education, health services, flood protection, energy, technology and communications services, and other services as appropriate.

Environmental Resources Element
Policy ER-1.1 Continually monitor the implementation and enforcement of water quality regulations by appropriate County, state, and federal agencies to prevent additional pollution of the City’s hydrologic resources, including aquatic environments, underground water basins, and surface waters.

Policy ER-1.2 Require all public and private grading and construction activities to minimize adverse impacts on the City’s water resources through the use of best management practices, as established and updated from time to time by the City of Corona.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-16
Policy ER-1.3 Implement standard conditions of approval on development and related projects that require appropriate mediation strategies if soil or groundwater contamination is encountered during project grading and construction.

Policy ER-1.4 Prohibit the discharge of toxins, debris, refuse, and other contaminants into watercourses, other drainages, water bodies, and groundwater basins. Work with appropriate entities to ensure the cleanup of contamination of existing water resources.

Policy ER-1.5 Support the Santa Ana Watershed Project Authority to advance efforts to achieve a watershed that is sustainable, drought-proof, salt-balanced, and capable of providing water resources for multiple benefits for current and future populations.

Policy ER-1.6 Provide active leadership in the regional coordination of water resource management and sustainability efforts affecting Riverside County and continue to monitor and participate in, as appropriate, regional activities to ensure a long-term reliable and sustainable supply of water.

Policy ER-1.7 Support efforts to create additional water storage and facilities where needed, in cooperation with federal, state, and local water authorities.

Additionally, support and/or engage in water banking in conjunction with these agencies where appropriate and as needed.

Policy ER-2.1 Sustain the quantity and quality of surface water and groundwater resources within the City of Corona and its sphere of influence for present and future uses.

Policy ER-2.2 Balance consideration of water supply requirements between urban, agricultural, and environmental needs so that sufficient supply is available to meet each of these different demands.

Policy ER-2.3 Implement water conservation through a wide range of regulations, public and business education, fiscal techniques, and implementing programs.

Policy ER-2.4 Require the use of water conservation features and materials in the design and construction of all public buildings, projects, and site development while encouraging their use citywide.

Policy ER-2.5 Require the use of reclaimed water in outdoor common areas and landscape treatments for homeowners associations, public facilities, commercial and industrial uses where feasible.

Policy ER-2.6 Provide ample opportunities to educate the public and businesses about the importance of water conservation, and the devices available for conservation purposes.

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-17
Policy ER-2.7 Promote resources that offer incentives for property owners and businesses to install and upgrade water efficient fixtures in their buildings, equipment, and landscaping. devices.

Policy ER-2.9 Support efforts to create additional water storage where needed, in cooperation with federal,state, and local water authorities. Additionally, support and/or engage in water banking in conjunction with these agencies where appropriate and as needed.

Policy ER-3.1 In cooperation with RCFCWCD, participate in development, maintenance, and implementation of facilities and programs to recharge City aquifers underlying the City and SOI.

Policy ER-3.2 Incorporate natural drainage systems (vegetated swales, small ponds, etc.) into developments, where appropriate and feasible, that offer opportunities for groundwater recharge.

Policy ER-3.3 Retain stormwater and runoff at or near the site of generation for percolation into the aquifer to conserve it for future uses and to mitigate adjacent flooding.

Policy ER-3.4 Use natural approaches to managing streams (such as nonchannelization strategies, softbottom streams, native vegetation, etc.), to the maximum extent possible, where groundwater recharge is likely to occur.

Policy ER-3.5 Cooperate with groundwater sustainability members to jointly pursue projects that will contribute to the long-term sustainability (recharge and safe yield) of the basins underlying Corona and SOI areas.

Policy ER-3.6 Manage the City’s reliance on imported water supplies, to the extent feasible and practical, through an enhanced focus on water conservation, groundwater recharge, and reclaimed water use.

Policy ER-4.1 Require urban uses to have a sufficient distance from a floodway boundary to ensure adequate protection of life, property, and habitat values.

Policy ER-4.2 Avoid altering floodways or channelization wherever possible; however, limit alterations to those that meet the following criteria:
• Alterations necessary for the protection of public health and safety only after all other options are exhausted
• Alterations essential to public service projects where no other feasible construction method or alternative project location exists • Projects where the primary function is the improvement of fish and wildlife habitats
Policy ER-4.3 Design alterations and improvements to floodways so that they avoid adverse environmental effects to the maximum extent feasible, considering the following environmental factors:
• Stream scour

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-18
• Erosion protection and sedimentation
• Wildlife habitat and linkages
• Groundwater recharge capability
• Adjacent property
• Natural designs (e.g., soft riparian bottoms and gentle bank slopes, and landscaping with native plants
Policy ER-4.4 Preserve and enhance existing native riparian habitat and prevent obstruction of natural watercourses to the extent feasible in new private and public developments or implement on-site replacement as mitigation.

Policy ER-4.5 Allow variances from city development standards on land area restricted from development due to its retention as a natural floodway, floodplain, or watercourse to encourage the preservation of natural watercourses without creating undue hardship on property owners.

Policy ER-5.1 Prohibit encroachment of development into wetlands; provide buffer zones, setbacks, or other effective techniques in project siting and design to minimize direct and indirect effects to wetland habitats.

Policy ER-5.2 During the development review process, ensure compliance with the Clean Water Act’s Section 404 in terms of wetlands mitigation policies and policies concerning fill material in jurisdictional wetlands.

Policy ER-5.3 Ensure compliance with habitat mitigation plans accepted by the applicable state and federal regulatory agencies that meet established ratios for wetland enhancement/restoration and on-/off-site compensation for the loss of wetland functions and values.

Policy ER-5.4 Consider wetlands for use as natural water treatment areas that will result in improvement of water quality.

Policy ER-5.5 Prohibit the planting of invasive, nonnative species in areas that would encroach and affect watercourses, their banks, and riparian areas.

4.10.5 PROJECT DESIGN FEATURES
PDF HYD-1: According to the Hydromodification Low Impact Development (LID) requirement, the proposed BPI development will install a system of catch basin inlets and storm drain pipes proposed to convey the runoff across the site to the designated discharge points. In addition, 10 Biotreatment Units (Modular Wetland System) and two underground detention chambers will be installed to provide water quality treatment for the proposed Drainage Management Areas (DMA).

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-19

4.10.6 THRESHOLDS OF SIGNIFICANCE
Based on the relevant CEQA Guidelines as currently implemented by the City of Corona, significant hydrology and water quality impacts would occur if the proposed Project or any Project-related component would:

Threshold HYD-1 Violate any water quality standards or waste discharge requirements or otherwise substantially degrade surface or groundwater quality? Threshold HYD-2 Substantially decrease groundwater supplies or interfere substantially with groundwater recharge such that the project may impede sustainable groundwater management of the basin ?
Threshold HYD-3 Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river or through the addition of impervious surfaces, in a manner which would:
i. Result in substantial erosion or siltation on- or off-site? Threshold HYD-4 ii. Substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or off-site?
Threshold HYD-5 iii. Create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff?
Threshold HYD-6 iv. Impede or redirect flood flows?
Threshold HYD-7 In flood hazard, tsunami, or seiche zones, risk release of pollutants due to project inundation?
Threshold HYD-8 Conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan?

METHODOLOGY
The analysis of hydrologic and water quality impacts is based on information and data contained in the Drainage Report and the WQMP (Appendix J and Appendix K, respectively), including site runoff estimates, soil properties, impervious surface area, and water quality BMPs. The Drainage Report used methodologies outlined in the Riverside County Hydrology Manual to perform hydrologic and hydraulic calculations and estimated storm flows using the CIVILCADD/CIVILDESIGN Engineering Software, Version 7.1 to compile storm discharge generated by the Rational Method. The WQMP was prepared in accordance with requirements of the Riverside County MS4 Permit using the SARWQCB’s WQMP template.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-20

4.10.7 ENVIRONMENTAL IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Impacts
Would the
Modified
Project result
in new or
more severe
impacts
requiring
revisions to
the Prior
EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions
to the Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the
Modified Project
requiring
revisions to the
Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

HYD-1 Violate any water quality
standards or waste
discharge requirements
or otherwise
substantially degrade
surface or groundwater
quality?
HYD-2 Substantially decrease
groundwater supplies or
interfere substantially
with groundwater
recharge such that the
project may impede
sustainable groundwater
management of the basin
?
HYD-3 Substantially alter the
existing drainage pattern
of the site or area,
including through the
alteration of the course of
a stream or river or
through the addition of
impervious surfaces, in a
manner which would:
i. Result in substantial
erosion or siltation onor off-site?
HYD-4 ii. Substantially increase
the rate or amount of
surface runoff in a
manner which would
result in flooding on- or
off-site?

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-21
Impacts
Would the
Modified
Project result
in new or
more severe
impacts
requiring
revisions to
the Prior
EIR?
Would the Modified
Project be
implemented under
changed
circumstances
resulting in new or
more severe impacts
requiring revisions
to the Prior EIR?
Is there new
information that
would result in
new or more
severe impacts
from the
Modified Project
requiring
revisions to the
Prior EIR?
Would the
Modified Project
result in
eliminated,
reduced, or no
changes to
impacts and no
changes to the
Prior EIR are
required?
Would the project:

HYD-5 iii. Create or contribute
runoff water which
would exceed the
capacity of existing or
planned stormwater
drainage systems or
provide substantial
additional sources of
polluted runoff?
HYD-6 iv. Impede or redirect
flood flows?
HYD-7 In flood hazard, tsunami,
or seiche zones, risk
release of pollutants due
to project inundation?
HYD-8 Conflict with or obstruct
implementation of a
water quality control
plan or sustainable
groundwater
management plan?

IMPACTS ASSOCIATED WITH THE MODIFIED PROJECT
Impact HYD-1: Violate any water quality standards or waste discharge requirements or otherwise substantially degrade surface or groundwater quality? Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

Construction
Construction of the GRRSP Planning Area and the proposed BPI development would require grading and excavation of soils, which would loosen sediment and then have the potential to mix with surface water runoff and degrade water quality. Additionally, construction would require the use of heavy equipment and construction-related chemicals, such as concrete, cement, asphalt, fuels, oils, antifreeze, transmission fluid, grease, solvents, and paints. These

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-22
potentially harmful materials could be accidentally spilled or improperly disposed of during construction and, if mixed with surface water runoff, could wash into and pollute waters.

Consistent with the 2001 EIR, short-term storm water pollutant discharges from each individual site within the GRRSP Planning Area would be prevented through compliance with the applicable NPDES permitting process. Coverage with applicable permits would prevent sedimentation and soil erosion through implementation of an SWPPP and periodic inspections by RWQCB staff. During the construction period, the development associated with the GRRSP would utilize a series of BMPs to reduce erosion and sedimentation consistent with those identified in the Certified EIR. To ensure that future development within the GRRSP Planning Area obtains coverage under the NPDES General Construction permit, implementation of the 2001 EIR Mitigation Measures 4.11.1A, 4.11.3A, 4.11.3.B, and 4.11.4A have been identified.

As a result, with implementation of mitigation measures 4.11.1A, 4.11.3A, 4.11.3.B, and

4.11.4A the Modified Project would not violate any water quality standards or waste discharge requirements, potential water quality degradation associated with construction activities would be minimized, and impacts would be less than significant.

Operation
The Modified Project would include the proposed BPI development consisting of five industrial buildings totaling in approximately 746,167 square feet within the business industrial designation. The GRRSP Planning Area is comprised of approximately 160.0 acres of undeveloped vacant land, and has been modified for the future 5.5 acres general commercial parcel north of Green River Road and the 20.39 acres Estate Residential situated on the southern portion of the property.

Potential pollutants associated with the proposed uses include various chemicals from cleaners, pathogens from pet wastes, nutrients from fertilizer, pesticides and sediment from landscaping, trash and debris, and oil and grease from vehicles. If these pollutants discharge into surface waters, it could result in degradation of water quality.

Section 15.36 of the City’s Municipal Code requires implementation of Water Quality Management Plan (WQMP) based on the anticipated pollutants that could result from new development and redevelopment projects. The Project’s WQMP was created to comply with the requirements of the City of Corona, the Riverside County Water Quality Management Plan, and the NPDES Areawide Stormwater Program. The BMPs would include pollutant source control features and pollutant treatment control features.

The source control BMPs would minimize the introduction of pollutants that may result in water quality impacts; and treatment control BMPs that would treat stormwater runoff. For the purposes of stormwater quality, an underground bioretention/biofiltration system is proposed.

The proposed BPI development would include the project design features, PDF HYD-1, of which would consist of 10 Biotreatment Units (Modular Wetland System) and two

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-23
underground detention chambers to provide water quality treatment for Drainage Management Areas (DMA) 2 through DMA 11. DMA 1 was identified as a Self-Treating Area due to the lack of impervious surfaces and requires no BMP. The proposed biotreatment units and underground detention chambers would capture, treat, and slow stormwater runoff for the 10- year and 100-year storm events.

However, in order to prevent impacts to operational water quality, the Modified Project would be required to prepare a site-specific Water Quality Management Plan (WQMP) to identify low-impact development storm water retention strategies and appropriate hydromodification controls to mitigate potential violations of water quality standards or waste discharge requirements. Consistent with the 2001 EIR, applicable Mitigation Measures 4.11.1.B,

4.11.2.A, 4.11.2B, 4.11.3.C, 4.11.3.D, and 4.11.4B have been identified. With implementation of PDF HYD-1, NPDES requirements and the WQMP, pursuant to the City Municipal Code, and City Council Ordinance No. 2291 and 2828 (included as 2001 EIR mitigation measures

4.11.1A, 4.11.1.B, 4.11.2.A, 4.11.2B, 4.11.3A, 4.11.3.B, 4.11.3.D, and 4.11.4A); which would be verified during the plan check and permitting process for the Modified Project, the Modified Project would not violate any water quality standards or waste discharge requirements, and impacts would be less than significant.

Therefore, no new or substantially greater impacts related to the violation of any water quality standards or waste discharge requirements would occur with implementation of the proposed Modified Project when compared to those identified in the 2001 EIR. The proposed Modified Project’s impacts are consistent with the impacts identified in the 2001 EIR and the level of impact (less than significant) remains unchanged from that cited in the 2001 EIR.

Mitigation Measures
The following Mitigation Measures from the previously certified 2001 EIR are applicable to the Modified Project are shown below and further described in detail Section 4.10.9:
• 4.11.1A, 4.11.1.B, 4.11.2.A, 4.11.2B, 4.11.3A, 4.11.3.B, 4.11.3.D, and 4.11.4A Impact HYD-2: Substantially decrease groundwater supplies or interfere substantially with groundwater recharge such that the project may impede sustainable groundwater management of the basin ? Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The proposed Project is located within the Coastal Plain of Orange County westerly adjacent to the Temescal Groundwater Basin. As analyzed in the Drainage Report and WQMP, development of the GRRSP Planning would introduce approximately 36.65 acres of impervious surfaces to the site. Buildout of the GRRSP Planning would require 107.02 acres of irrigated surfaces and landscaping of the proposed BPI development would achieve the

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-24
minimum 15.65 acers of irrigated landscape. Future development within the GRSSP Planning Area would be required to implement a project-specific WQMP as previously stated to achieve the required impervious surface. The proposed BPI development would include the project design features, PDF HYD-1, of which would consist of 10 Biotreatment Units (Modular Wetland System) and two underground detention chambers to provide water quality treatment for Drainage Management Areas (DMA) 2 through DMA 11. DMA 1 was identified as a SelfTreating Area due to the lack of impervious surfaces and requires no BMP. In total, the proposed BPI development would incorporate approximately 16.1 acres of landscape acreage, thereby above the required acreage according the WQMP. Furthermore, the Project site is not located within an area known for hydrogeologic groundwater. As a result, the Modified Project would not decrease groundwater supplies or interfere substantially with groundwater recharge; and the Project would not impede sustainable groundwater management of the basin.

Therefore, the Project would result in a less than significant impact on groundwater supplies and groundwater recharge. No mitigation is required.

The proposed Modified Project’s impacts are consistent with the impacts identified in the 2001 EIR and the level of impact (less than significant) remains unchanged from that cited in the 2001 EIR.

Mitigation Measures
No mitigation measures are required.

Impact HYD-3: Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river or through the addition of impervious surfaces, in a manner which would:
i. Result in substantial erosion or siltation on- or off-site? Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

Although the GRRSP Planning Area does not include, a natural stream, river or other body of water, the Project site does contain several ravines (non-wetland waters) which convey natural drainage across the Modified Project site to off-site tributaries. Under existing conditions, development of the Modified Project would alter the course of a stream thereby impacting the existing drainage pattern.

As previously discussed, a SWPPP would be implemented during construction to control drainage and maintain drainage patterns across the Modified Project (MM 4.11.3A). As discussed in the WQMP (Appendix K) existing drainage patterns would remain unchanged, which would result in a decrease in time of concentration due to increase in imperviousness.

To address this increase, the BPI development, proposes a biofiltration system that would

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-25
capture runoff prior to discharge off-site (PDF HYD-1). All storm water runoff will be carried via typical street sections and an onsite storm drain system. In addition, the Drainage Report determined, a 10-year storm event would be contained below the top of curb and a 100-year storm event would be protected from the industrial building pads. Additionally, the installation of onsite landscaping, a biofiltration system, and catch basins would be designed to accommodate the increased flow volume. Moreover, impacts from the erosion of existing natural downstream canyons and hillsides will be mitigated to a less than significant level by properly designed grading, detention basins, energy dissipators and erosion protection rip-rap pads at the outlet of storm drain system (MM HYD-1).

Additionally, according to the FEMA’s FIRM Map #06065C0668G, #06065C0669G, and #06065C1335GG the Project site is zoned as Flood Zone X, area with minimal flood hazard.

The City would review the Modified Project permit applications to ensure the proposed BPI and future development within the GRRSP would not be subject to significant flood hazard and structures would be floodproofed and would not impede or redirect flood flows. As such, with implementation of mitigation measures MM HYD-1, and 4.11.3A, the Modified Project would result in a less than significant impact on the existing drainage pattern.

The proposed Modified Project’s impacts are consistent with the impacts identified in the 2001 EIR and the level of impact (less than significant) remains unchanged from that cited in the 2001 EIR.

Mitigation Measures
The following Mitigation Measures from the previously certified 2001 EIR are applicable to the Modified Project are shown below and further described in detail Section 4.10.9:
• 4.11.3A
The Modified Project introduces the following Mitigation Measures and are further described in detail Section 4.3.10.
• MM HYD-1
Impact HYD-4: ii. Substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- or off-site?
Impact HYD-6: iv. Impede or redirect flood flows?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As discussed previously, the Modified Project site is classified as Flood Zone X, area of minimal flood hazard. In addition, the Modified Project site does not include, and is not adjacent to, a body of water such as a natural stream or river that would increase the potential for flooding. Also, as discussed previously, the Modified Project would introduce

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-26
approximately 36.65 acres of impervious surfaces to the GRRSP Planning Area, which would increase stormwater runoff from the Project site. However, the Modified Project, consistent with the 2001 EIR, would implement mitigation to reduce flooding hazards on- or offsite impacts to a less than significant level. As detailed below, MM 4.11.2.A requires that all proposed storm drain facilities and equipment shall be designed, installed and maintained in a manner to convey peak flows estimated for the Modified Project. In addition, the MM 4.11.2A also requires future development of the GRRSP Planning Area drainage plans shall be submitted to the City for review and approval prior to the issuance of grading permits. As it relates to the proposed BPI development, as previously stated, will incorporate PDF HYD-1 for the proposed on-site storm drain system consisting of catch basin inlets and storm drain pipes proposed to convey the runoff across the site to the designated discharge points. In addition, 10 Biotreatment Units (Modular Wetland System) and two underground detention chambers will be installed to provide water quality treatment for the proposed Drainage Management Areas (DMA). PDF HYD-1 shall be constructed to accommodate storm flows from the site designed, installed and maintained in a manner to reduce on-site runoff to a level that can be accommodated by the existing culverts beneath Green River Road.

Adherence to the existing requirements and implementation of the post construction stormwater requirements would be confirmed during Project plan check prior to Project approval. Therefore, with implementation of mitigation measure MM4.11.2A and project design PDF HYD-1, the Modified Project would result in a less than significant impact on flood flows and flooding hazards on- or offsite.

The proposed Modified Project’s impacts are consistent with the impacts identified in the 2001 EIR and the level of impact (less than significant) remains unchanged from that cited in the 2001 EIR.

Impact HYD-5: iii. Create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

The Modified Project site would include development of approximately 36.65 acres of impermeable surfaces, which would be an increase from the existing undeveloped vacant impervious surface area. Project site existing drainages flow from the south to a low point within the northern portion of the site, ultimately conveyed into the existing drainage pipelines/culverts crossing Green River Road and to SR 91.

Use of the subsurface infiltration chamber would regulate the rate and velocity of stormwater flows and would control the amount of discharge into the off-site drainage system. As discussed above, the Modified Project would not result in significant impacts related to water

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-27
quality. In addition, the drainage facilities proposed for the BPI development have been sized to adequately accommodate the stormwater flows from the proposed development and are consistent with the County drainage plans and MS4 permit requirements. The proposed oversized infiltration system would accommodate existing stormwater infrastructure capacity by holding the entire design capture volume in the chamber and allow high flows to discharge from the site at a reduced flowrate. The existing southerly drainage pattern is not maintained; however, times of concentration are preserved through the use of dual underground infiltration systems. Therefore, impacts would be less than significant.

Mitigation Measure
No mitigation measures are required.

Impact HYD-7: In flood hazard, tsunami, or seiche zones, risk release of pollutants due to project inundation?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As discussed previously, the Modified Project site is classified as Flood Zone X, area of minimal flood hazard. The GRRSP Planning Area is located approximately 27 miles northeast of the Pacific Ocean. Therefore, the Modified Project is not located within a tsunami zone.

Similarly, a seiche is the sloshing of a closed body of water from earthquake shaking. Seiches are of concern relative to water storage facilities because inundation from a seiche can occur if the wave overflows a containment wall, such as the wall of a reservoir, water storage tank, dam, or other artificial body of water. The nearest body of water is the Prado Reservoir, approximately 1.1 miles to the north. According to the City’s General Plan, the Project site is not within a dam inundation zone, nor in the vicinity of any impounded bodies of water; therefore, the Project is not at risk of a seiche.

The proposed Modified Project’s impacts are consistent with the impacts identified in the 2001 EIR and the level of impact (less than significant) remains unchanged from that cited in the 2001 EIR.

Impact HYD-8: Conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan?
Eliminated, Reduced, or No Changes to Impacts and No Changes to the Prior EIR are Required.

As previously discussed, the Modified Project and BPI development would comply with the Construction General Permit by developing and implementing a site-specific SWPPP and construction stormwater BMPs throughout the construction phase. The Modified Project and BPI development would also comply with the MS4 Permit by incorporating LID BMPs into project design, which would avoid or minimize the amount and type of pollutants leaving the

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-28
project, entering receiving waters, and impacting water quality and beneficial uses defined for these waters by the Basin Plan. In addition, LID BMPs would allow stormwater infiltration into the local aquifer and minimize or avoid impacts to groundwater quality, and to beneficial uses of the Coastal Plain of Orange County Basin.

The Modified would not include a groundwater well, and the Project would not demand water at a rate exceeding what the City of Corona could supply (see Section 4.19, Utilities and Service Systems, for discussion of Project water demands relative to water supplies). The Modified Project would not conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan; no impact would occur, and mitigation is not required.

4.10.8 CUMULATIVE IMPACTS ASSOCIATED WITH THE MODIFIED

PROJECT
Less Than Significant Impact/No Changes or No New Information Requiring Preparation of an EIR. As concluded in the preceding analysis, the Modified Project would not change the significance of Hydrology and Water Quality impacts as compared to the prior 2001 EIR.

The geographic scope for cumulative impacts on hydrology and water quality includes the Santa Ana River Watershed. Implementation of the Modified Project would include compliance with all required laws, permits, ordinances, and plans, such as the MS4 Permit, and Construction General Permit requirements, that would reduce incremental effects to hydrology and water quality. The Modified Project would result in an increase of impervious surfaces within the watershed and is required to include pervious surfaces to retain storm water drainage on site. This increase in impervious surfaces with implementation of the proposed BMPs (PDF HYD-1) as required by the MS4 Permit would not lead to an increase in surface runoff or significant pollutant loadings.

Other future developments within the urban and developed subwatershed would have similar effects as the Modified Project. The areas surrounding the Modified Project area are of similar urban nature, and any future development would also include compliance with all required laws, permits, ordinances, and plans, such as the MS4 Permit, and Construction General Permit requirements, in order to meet runoff requirements. This would help reduce impacts to water quality and retain runoff and ensure that the incremental effects of individual projects do not cause a substantial cumulative impact related to water quality. For example, each related project would be required to develop a SWPPP (for construction), a WQMP (for operation), and a hydrology report, and would be evaluated individually to determine appropriate BMPs and treatment measures to reduce impacts to surface water quality and hydrology. In addition, cities review all development projects on a case-by-case basis to ensure that sufficient local and regional drainage capacity is available. Furthermore, the analysis in a Project’s hydrology

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-29
report is cumulative in nature due to the project and existing developments impact on storm drainage within the watershed area.

Combined impacts to water quality, to the storm drain system, and from the creation of flooding hazards from past, present, and future projects would be less than significant cumulatively. Therefore, because water quality, drainage, and flooding would not be adversely affected by the Modified Project, the proposed Project’s contribution to cumulative hydrology and water quality impacts would not be cumulatively considerable.

4.10.9 MITIGATION MEASURES IDENTIFIED IN PRIOR EIR APPLICABLE TO

MODIFIED PROJECT

4.11.1A: The project applicant shall obtain all required permits and clearances from the Corps, the RWQCB, and the CDFG prior to the disturbance of any existing drainage.

4.11.1.B: Drainage facilities within engineered slopes/fills shall be designed and installed in accordance with the City of Corona standards.

4.11.2.A: All proposed storm drain facilities and equipment shall be designed, installed and maintained in a manner to convey peak flows estimated for the project.

Drainage plans shall be submitted to the City for review and approval prior to the issuance of grading permits.

4.11.2B: On-site detention basins shall be constructed to accommodate storm flows from the project site. Such facilities shall be designed, installed and maintained in a manner to reduce on-site runoff to a level that can be accommodated by the existing culverts beneath Green River Road. All required drainage structures shall be designed, installed, and maintained in accordance with applicable City of Corona standards.

4.11.3A: The construction and/or grading contractor shall establish and implement a construction Storm Water Pollution Prevention Plan (SWPPP) and postconstruction Water Quality Management Plan (WQMP) in accordance with NPDES permit issued by the Santa Ana RWQCB.

4.11.3.B: In accordance with issuance of a NPDES permit, the construction and/or grading contractor shall establish and implement specific Best Management Practices (BMP) at time of project implementation. Construction erosion and sediment control plans shall be submitted to the City for review and approval prior to the issuance of grading permits. BMPs to minimize erosion and/or sedimentation impacts shall include (but not be limited to) the following:
• Collection of runoff entering developing areas into surface and subsurface drains for removal to nearby drainages.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-30
• Capture of runoff above steep slopes or poorly vegetated areas and conveyance to nearby drainages. • Conveyance of runoff generated on paved or covered areas via drains and swales to natural drainage courses.
• Revegetation of disturbed areas and vegetation of non-disturbed but highly erosive areas.
• Use of drought tolerant plants and irrigation systems which minimize runoff.
• Use of other erosion control devices such as rip-rap, gabions, concrete lining, small check dams, etc. to reduce erosion in gullies and active stream channels.
• During the time that on-site soils are exposed, the soil surface shall be approximately 2 feet below the surrounding grade. Any storm water falling on exposed soils will infiltrate on site.
• To the maximum extent possible, on-site vegetation shall be maintained. • Limit grading disturbance to essential project area.
• Limit grading activities during the rainy season.
• Balance and limit, to the extent possible, the amount of cut and fill. • Water entering and exiting the site shall be diverted through the placement of interceptor trenches or other erosion control devices. • Water shall be sprayed on disturbed areas to limit dust generation. • The construction entrance shall be stabilized to reduce tracking onto adjacent streets.
• Dikes, drains, swales or other features shall be used to divert and/or redirect runoff.

4.11.3.C: Manufactured slopes shall be stabilized. Where appropriate, retaining wall designs shall include waterproofing and weep holes, subdrains or backdrains for relieving possible hydrostatic pressures.

4.11.3.D: Manufactured slopes shall be revegetated to help ensure stability. Revegetation plans shall be submitted to the City for review and approval prior to the issuance of grading permits. Plant selection shall comply with the Plant Palette contained in Section 4.3.6 of the Green River Ranch Specific Plan.

4.11.4A: Development within the Specific Plan area shall comply with applicable provisions of the NPDES permit and the applicable standards and regulations of responsible agencies.

4.11.4B: Precast “stormceptors” shall be installed in parking areas and/or in areas where fuels, oils, solvents or other pollutants may enter the stormwater stream (i.e., gas stations, loading areas). Such devices shall be adequately maintained

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 2024

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-31
(including the cleaning/replacing of absorbent fiberglass “pillows” and periodic removal of accumulated sand and silt).

4.10.10 NEW MITIGATION MEASURES APPLICABLE TO MODIFIED PROJECT MM HYD-1: Erosion of existing natural downstream canyons and hillsides will be mitigated by properly designed grading, detention basins, energy dissipators and erosion protection rip-rap pads at the outlet of storm drain system.

CITY OF CORONA
SEPTEMBER 2024

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

HYDROLOGY AND WATER QUALITY

ENPLANNERS

4.10-32
This Page Intentionally Left Blank

DRAFT SUBSEQUENT EIR

GREEN RIVER RANCH SPA & BUSINESS PARK

INDUSTRIAL DEVELOPMENT AND
RELOCATION OF PCL - 1

CITY OF CORONA
SEPTEMBER 202 4

LAND USE AND PLANNING

ENPLANNERS

4.11-1

4.11 LAND USE AND PLANNING

4.11.1 INTRODUCTION
This section provides a summary of applicable impacts and mitigation measures from the 2001 EIR, an overview of existing land use and planning within the GRRSP Planning Area and surrounding region, a summary of applicable regulations, and analyses of potential changes in impacts to land use and planning from implementation of the Modified Project in comparison to the Approved Project. The Public Scoping Meeting comments from Jeffrey Meissner, Craig Reiter were received pertaining to this topic. The NOP comment letters from Southern California Association of Governments were received pertaining to this topic.

4.11.2 SUMMARY OF IMPACTS AND MITIGATION MEASURES FROM THE 2001 EIR
The 2001 EIR determined the Approved Project would result in no impact related to land use and planning as follows.
a) Physically divide an established community?
The 2001 EIR identified the existing a horse boarding operation operating in the northern, flatter, portion of the Approved Project site south of Green River Road that is no longer in operation. The St. James Orthodox Christian Monastery was identified as occupying a former restaurant on site that has ceased operations. The 2001 EIR acknowledged implementation of the Approved Project would necessitate removal of the facilities associated with these former uses but determined did not represent an identified community. Therefore, the 2001 EIR concluded the Approved Project would result in no impact related to physically dividing an established community.
b) Cause a significant environmental impact due to a conflict with any land use plan, policy, or regulation adopted for the purpose of avoiding or mitigating an environmental effect?
Prior to approval of the Approved Project, approximately 2 acres of the GRRSP Planning Area was located in the City’s limits and the remaining approximately 166 acres was located in unincorporated Riverside County. The 2001 EIR determined the Approved Project’s proposed land uses would conflict with the Riverside County’s Zoning Ordinance, but the conflict was considered a less than significant impact because the Approved Project’s applicant proposed annexation of the Approved Project site into the City as well as adoption of the GRRSP. The GRRSP would modify land use designations in the Planning Area to accommodate the uses proposed in the GRRSP. The 2001 EIR considered the conflict to be a less than significant impact given the Approved Project would be annexed into the City of Corona and adoption of