Agenda packet — Yorba Linda City Council, March 3, 2026 (part 3 of 4)

19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
37 results of the Geotechnical Investigation determined development of the site is feasible from a geotechnical perspective and provided recommendations to be incorporated into the site development and construction plans such as removal and recompaction of the upper three to five feet of soils to provide suitable support for the proposed buildings. Additionally, mandatory compliance with the California Building Code (CBC) and the City’s Building Code would ensure impacts related to geologic hazards would be less than significant.

Consistent with the analysis in the HEIP PEIR, development within the proposed Project site would be required to comply with the National Pollution Discharge Elimination System (NPDES) permit by preparing and implementing a Stormwater Pollution Prevention Plan (SWPPP) specifying best management practices (BMPs) for minimizing pollution of stormwater with soil and sediment during Project construction. Adherence to the BMPs in the SWPPP would reduce, prevent, or minimize soil erosion from Project-related grading and construction activities. Therefore, impacts related to substantial soil erosion or the loss of topsoil would be less than significant.

Projects developed in accordance with the HEIP would include sewer laterals and would not rely on septic tanks or other alternative wastewater disposal systems. Therefore, no impact related to septic tanks or alternative waste disposal systems would occur.

As described above, compliance with City Standard Condition Planning No. 06 and compliance with General Plan Policies HR-2.5, and OR-6.1 through OR-6.5 would ensure potential impacts related to unknown paleontological resources that could be unearthed through Project construction activities would reduce potential impacts to less than significant. Overall, no new or more severe impacts related to geology and soils would occur as a result of the proposed Project when compared to the HEIP PEIR.

Hazards and Hazardous Materials
Consistent with the analysis in the HEIP PEIR, the use, storage, transport, and disposal of construction-related hazardous materials and waste would be required to conform to existing laws and regulations. Compliance with applicable laws and regulations governing the use, storage, and transportation of hazardous materials would ensure that all potentially hazardous materials are used and handled in an appropriate manner and would minimize the potential for safety impacts to occur. Furthermore, strict adherence to all emergency response plan requirements set forth by the City of Yorba Linda and Orange County Fire Authority (OCFA) would be required through the duration of the Project construction. Operation of the proposed residential units would involve the use of small quantities of hazardous materials for cleaning and maintenance purposes, such as paints, household cleaners, fertilizers, and pesticides. These types of materials are not acutely hazardous and would only be used and stored in limited quantities. The normal routine use of these hazardous materials products pursuant to existing regulations would not result in a significant hazard to people or the environment in the vicinity of the Project. Therefore, hazards to the public or the environment arising from the routine use of hazardous materials and potential accidents involving the release of hazardous materials into the environment during Project construction and operation would be less than significant.

A Phase I Environmental Site Assessment (ESA) was prepared for the proposed Project (included as Appendix B) for the purpose of determining the presence or absence of hazardous materials pertaining to the release of hazardous materials into the soil, surface water, and/or groundwater by identifying recognized environmental conditions (RECs), including historical recognized environmental conditions (HRECs), and controlled recognized environmental conditions (CRECs) that may exist at the property. The results of the Phase I ESA identified that the Project site contained a former 500-gallon underground storage tank (UST), which was removed on April 27, 2020. During the UST removal, soil samples were collected from 5 feet below ground surface (bgs) on both ends of the tank excavation and showed only minor detections of gasoline, xylenes, and toluene. Based on this data, the Orange County Health Care Agency provided a case closure letter dated June 2, 2020, for the former UST. However, because soil vapor sampling was not

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City of Yorba Linda Environmental Consistency Analysis
38 conducted at the time, the Phase I ESA considered this a potential REC and recommended that a Phase II ESA be conducted to evaluate soil vapor conditions in the vicinity of the former UST (Appendix B).

The second REC identified with the Project site is related to the site’s current and former agricultural use. The Project site has been in agricultural use since at least the 1930s; therefore, the Phase I ESA recommended performing a shallow soil investigation on the site to sample and analyze soil for the presence of pesticides and the heavy metals that typically accompany herbicide application (i.e., arsenic and lead) (Appendix B).

To investigate the RECs identified during the Phase I ESA, a Phase II ESA (included as Appendix C) was completed at the Project site on June 24 and 27, 2022, which included soil testing and laboratory testing.

Ten soil samples were collected to test for the present of contaminants. Only one of the ten soil samples had minor detections of pesticides (4,4’-DDE and 4,4’-DDT); however, the concentrations were well below their respective residential screening levels. No other organochlorine pesticides (OCPs) were reported above the laboratory reporting limits in any of the other soil samples collected and submitted for analysis. Lead was reported in all ten soil samples at concentrations below the residential screening level of 80 milligrams per kilogram. There were no detections of arsenic or total petroleum hydrocarbon (TPH) reported in any soil samples analyzed. Therefore, the historical agricultural use of the Project site was determined not to represent a REC and no further assessment or action was recommended.

In relation to the former UST, there were no detections of Total Petroleum Hydrocarbons – Gasoline Range Organics (TPH-GRO) or volatile organic compounds (VOCs) above their corresponding laboratory reporting limits, with the exception of two minor detections of chloroform in two of the samples. The Phase II ESA determined that based on the results of the soil vapor assessment, the former UST does not represent a REC or vapor intrusion concern and no further assessment or action is needed. Therefore, it was determined that the agricultural use and the former UST do not represent an REC to the Project site, and there are no other RECs associated with the Project site. The Phase II ESA concluded no further action or investigation regarding the environmental condition of the Project site is needed (Appendix C).

The closest school to the site is Aleph Preschool and Discovery of Learning, located within the North County Chabad Center, located adjacent to the western property line of the Project site. The closest portion of the Chabad Center building to the Project property line is as close as 55 feet. Fairmont Elementary School is located approximately 0.5 miles east of the Project site. As described previously, construction and operation of the Project would involve the use, storage, and disposal of small amounts of hazardous materials on the Project site. These hazardous materials would be limited and used and disposed of in compliance with federal, State, and local regulations, which would reduce the potential for accidental release into the environment near a school. Further, emissions that would be generated from construction and operation of the proposed Project were evaluated in the air quality analysis in Section 5.1, Air Quality, herein, which determined that emissions generated from the proposed Project would not cause or contribute to an exceedance of the federal or State air quality standards, regionally, or at the nearest sensitive receptors to the Project site. The nearest sensitive receptors consist of single-family residences located adjacent to the north and south of the Project site and, approximately 4.5 meters (15 feet) north of the Project boundary, both of which are closer to Project site than the Chabat Center. Thus, this project-specific analysis concludes that the Project would not emit hazardous or handle acutely hazardous materials, substances, or waste within

0.25 miles of a school, and impacts would be less than significant.

The HEIP PEIR determined none of the housing opportunity sites are identified on any hazardous materials databases compiled pursuant to Government Code Section 65962.5; therefore, the Project is consistent with the findings and will not create a hazard to the public in this manner.

The nearest public-use airport to the City is the Fullerton Municipal Airport approximately 10 miles to the west. No portion of the City is within an airport land use plan or within two miles of an airport. Thus, consistent

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City of Yorba Linda Environmental Consistency Analysis
39 with the HEIP PEIR, implementation of the Project would not result in safety hazards related to aircraft operations and no impact would occur.

Overall, no new or more severe impacts related to hazards and hazardous materials would occur as a result of the proposed Project when compared to the HEIP PEIR.

Hydrology and Water Quality
Construction of future projects under the HEIP would be subject to the requirements of the State Water Resources Control Board’s (SWRCB) National Pollutant Discharge Elimination System (NPDES) General Permit for Storm Water Discharges associated with the Construction General Permit. Compliance with the Construction General Permit requires completing a construction site risk assessment to determine appropriate coverage level, filing a Notice of Intent (NOI) with the SWRCB, and preparation of a Stormwater Pollution Prevention Plan (SWPPP). Mandatory adherence to the Construction General Permit and implementation of measures outlined in the SWPPP would ensure that the Project does not violate any water quality standards or waste discharge requirements during construction activities. Therefore, water quality impacts associated with construction activities would be less than significant.

To address post-development water quality impacts, the City requires new development and significant redevelopment projects within the City to address storm water quality impacts through incorporation of permanent (post-construction) Best Management Practices (BMPs) in project design. The City requires the Project applicant to submit a project WQMP at the project processing and permitting stages. A Preliminary WQMP was prepared for the proposed Project and is included as Appendix E. Additionally, the Project would be required to comply with the YLMC Section 16.04 (Water Quality Control). Therefore, compliance with local standards would ensure potential water quality impacts associated with operation would be less than significant.

Consistent with the analysis of the HEIP PEIR, the proposed Project does not involve the use of any wells or other groundwater extraction activities. Therefore, the Project would not substantially deplete or decrease groundwater supplies and impacts would be less than significant.

The HEIP PEIR determined development associated with the housing opportunity sites would mostly occur on previously developed sites and would not alter the existing course of a stream or river. Additionally, implementation of a WQMP would reduce potential impacts related to operation water quality impact such as runoff control. Additionally, according to the Federal Emergency Management Agency’s (FEMA) Flood Insurance Rate Map 06059C0068J, the Project site is not within a flood hazard zone (FEMA, 2009).

Therefore, with compliance with Federal and local regulatory requirements, impacts related to impeding or redirecting flood flows would be less than significant.

The HEIP PEIR determined compliance with Federal and local regulatory requirements related to flood hazard risks would reduce potential impacts related to risk of pollutant release during flooding to less than significant. Additionally, HEIP PEIR determined that none of the housing opportunity sites are located near a closed body of water which could be subject to seiche and none of the housing opportunity sites are located within a dam inundation area. Therefore, impacts related to risk of pollutant release due to inundation from a seiche would not occur. The City is approximately 19 miles inland from the Pacific Ocean and is outside of the tsunami hazard zone identified by the California Governor’s Office of Emergency Services. Thus, no impacts related to tsunami would occur with implementation of the HEIP or the proposed Project.

The HEIP PEIR describes that the City is in the Orange County Basin and the Basin has a Groundwater Basin Master Plan. Future projects under the HEIP would be required to comply with the NPDES standards and the City’s Water Quality Control regulations to ensure pollutant loads are minimized for downstream receiving waters. The Santa Ana Regional Water Quality Control Board (SARQWCB) would also require a WQMP to be prepared and implement BMPs for site-specific runoff controls and treatments. Conformance would be

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19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
40 ensured during the permitting process with the City’s Community Development Department. Therefore, the HEIP PEIR determined implementation of the project would not obstruct implementation of applicable water quality control plans, and impacts would be less than significant. Overall, no new or more severe impacts related to hydrology and water quality would occur as a result of the proposed Project when compared to the HEIP PEIR.

Mineral Resources
The HEIP PEIR describes that mineral resources present in the City are petroleum and aggregate materials and that three housing opportunity sites are located within the City’s Oil Production Zones (S3-201; S3-210; and S3-203). However, all oils wells on these sites are plugged and sealed and have since been developed over. The proposed Project site is not located in an Oil Production Zone and implementation of the Project would not result in the loss of availability of mineral resources valuable to the region or state. Additionally, the HEIP PEIR determined existing oil reserves would continue to be protected based on the land use designations on these areas and no significant impacts are anticipated. Consistent with the analysis in the HEIP PEIR, no impact related to mineral resources would occur with implementation of the proposed Project.

Overall, no new or more severe impacts related to mineral resources would occur as a result of the proposed Project when compared to the HEIP PEIR.

Population and Housing
The HEIP PEIR determined construction of future projects under the HEIP would not directly or indirectly induce substantial population growth in the city because construction workers are anticipated to come from within the existing labor force in the region and would not require relocation. The HEIP PEIR also determined buildout of the General Plan would result in a total population of 78,119 persons which would exceed the Southern California Association of Government’s (SCAG’s) 2045 population growth estimates for the city.

The HEIP PEIR determined buildout of the HEIP would result in a total of 74,845 residents. However, this would not result in substantial unplanned growth in the area because SCAG assigns Regional Housing Needs Allocation (RHNA) obligations and would update its Regional Transportation Plan/Sustainable Community Strategy (RTP/SCS) to reflect planned growth consistent with the City’s adopted Housing Element.

Additionally, the HEIP was prepared as a response to an existing unmet need and the housing opportunity sites are infill development with adequate nearby infrastructure. Therefore, the Project would not result in substantial unplanned population growth. Impacts would be less than significant.

The HEIP PEIR determined buildout of the HEIP is not expected to displace a substantial amount of existing housing units or people; it would increase the number of dwelling units and population by allowing higher intensity residential uses. The proposed Project site is currently developed with a single-family residence which is currently vacant. Therefore, impacts would be consistent with the HEIP PEIR and less than significant.

Overall, no new or more severe impacts related to population and housing would occur as a result of the proposed Project when compared to the HEIP PEIR.

Utilities and Service Systems
The HEIP PEIR determined the project would not require or result in the relocation or construction of new or expanded water, wastewater treatment or storm water drainage, electric power, natural gas, or telecommunications facilities, the construction or relocation of which could cause significant environmental effects. The HEIP PEIR determined no housing opportunity sites are constrained by infrastructure availability.

As described in Section 3.0, Project Description, the Project would connect to existing water, stormwater, sewer, and electric facilities adjacent to the site. The construction activities related to the on-site utility infrastructure that would be needed to serve the proposed Project is included as part of the Project and would not result in any physical environmental effects beyond those identified throughout this document. For example, analysis of construction emissions from excavation and installation of the utility infrastructure is

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City of Yorba Linda Environmental Consistency Analysis
41 included in Sections 5.1, Air Quality, and 5.4, Greenhouse Gas Emissions. Therefore, consistent with the HEIP PEIR, the proposed Project would not result in the construction of new utility facilities or expansion of existing facilities, the construction of which could cause significant environmental effects, and impacts would be less than significant.

The HEIP PEIR determined the Yorba Linda Water District (YLWD) would have sufficient water supplies available to serve the Project and reasonably foreseeable future development during normal, dry and multiple dry years. Therefore, impacts related to water supply would be less than significant. Additionally, the wastewater generated by buildout of the Project would not exceed the capacity of the YLWD or Orange County Sanitation District (OCSD). Therefore, impacts related to wastewater treatment capacity would be less than significant.

The HEIP PEIR also determined buildout of the HEIP’s 2,410 new residential units would represent approximately less than one percent of the remaining daily capacity at the Olinda Alpha Landfill, which serves the project area. Therefore, there would be adequate capacity in the landfill to serve buildout of the project and impacts would be less than significant. Further, future implementing projects would be required to adhere to all applicable solid waste statutes and regulations, such as AB 939, SB 2202, SB 1016, and the California Solid Waste Reuse and Recycling Act of 1991. Therefore, the project would comply with federal, State, and local management and reduction statutes and regulations related to solid waste and impacts would be less than significant. Overall, no new or more severe impacts related to utilities and service systems would occur as a result of the proposed Project when compared to the HEIP PEIR.

4.3. DETERMINATION
☒ No substantial changes are proposed in the project and there are no substantial changes in the circumstances under which the project will be undertaken that will require major revisions to the previous approved ND or MND or certified EIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified significant effects. Also, there is no "new information of substantial importance" as that term is used in CEQA Guidelines Section 15162(a)(3). Therefore, the previously adopted ND or MND or previously certified EIR adequately discusses the potential impacts of the project without modification.
☐ No substantial changes are proposed in the project and there are no substantial changes in the circumstances under which the project will be undertaken that will require major revisions to the previous approved ND or MND or certified EIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified significant effects. Also, there is no "new information of substantial importance" as that term is used in CEQA Guidelines Section 15162(a)(3). Therefore, the previously adopted ND, MND or previously certified EIR adequately discusses the potential impacts of the project; however, minor changes require the preparation of an ADDENDUM.
☐ Substantial changes are proposed in the project or there are substantial changes in the circumstances under which the project will be undertaken that will require major revisions to the previous ND, MND or EIR due to the involvement of significant new environmental effects or a substantial increase in the severity of previously identified significant effects. Or, there is "new information of substantial importance," as that term is used in CEQA Guidelines Section 15162(a)(3). However, all new potentially significant environmental effects or substantial increases in the severity of previously identified significant effects are clearly reduced to below a level of significance through the incorporation of mitigation measures agreed to by the project applicant.

Therefore, a SUBSEQUENT MND is required.
☐ Substantial changes are proposed in the project or there are substantial changes in the circumstances under which the project will be undertaken that will require major revisions to the previous environmental document due to the involvement of significant new environmental effects or a substantial increase in the severity of previously identified significant effects. Or, there is "new information of substantial importance," as that term is used in CEQA Guidelines Section 15162(a)(3). However, only minor changes or additions or changes would

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City of Yorba Linda Environmental Consistency Analysis
42 be necessary to make the previous EIR adequate for the project in the changed situation. Therefore, a SUPPLEMENTAL EIR is required.
☐ Substantial changes are proposed in the project or there are substantial changes in the circumstances under which the project will be undertaken that will require major revisions to the previous environmental document due to the involvement of significant new environmental effects or a substantial increase in the severity of previously identified significant effects. Or, there is "new information of substantial importance," as that term is used in CEQA Guidelines Section 15162(a)(3) such as one or more significant effects not discussed in the previous EIR. Therefore, a SUBSEQUENT EIR is required.
___________________________ _________________________
Signature Date
___________________________ _________________________
Printed Name For

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City of Yorba Linda Environmental Consistency Analysis
43 5. ENVIRONMENTAL ANALYSIS
This section provides evidence to substantiate the conclusions in the environmental checklist.

5.1. AIR QUALITY
Where available, the significance criteria
established by the applicable air quality
management or air pollution control district
may be relied upon to make the following
determinations. Would the project:

Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Information
Identifying
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No New
Impact/
No
Impact
a) Conflict with or obstruct implementation of
the applicable air quality plan?
b) 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)?
c) Expose sensitive receptors to substantial
pollutant concentrations?
d) Result in other emissions (such as those
leading to odors) adversely affecting a
substantial number of people?
Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to air quality under Section 4.1. The HEIP PEIR describes that the South Coast Air Quality Management District’s (SCAQMD) 2016 Air Quality Management Plan (AQMP) is the applicable AQMP for the project area. In determining consistency with the AQMP, the HEIP PEIR determined that future project construction-source and operational-source air emissions have the potential to exceed the applicable regional significance thresholds for criteria pollutants. Therefore, the project would have the potential to result in or cause violations of the California Ambient Air Quality Standards (CAAQS) and National Ambient Air Quality Standards (NAAQS). Additionally, the HEIP PEIR determined that buildout of the project could exceed the growth projections from the AQMP. Therefore, the HEIP PEIR determined the project would be inconsistent with the AQMP and impacts would be significant. The project would implement development-specific air quality Mitigation Measures (MM 4.1-1 and 4.1-2), to reduce the project’s construction-source and operational-source air pollutant emissions. Additionally, compliance with SCAQMD emissions reductions and control requirements would reduce project air pollutant emissions. However, it cannot be definitively stated that all future development projects would not exceed the applicable thresholds.

Therefore, impacts would remain significant and unavoidable.

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19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
44 The HEIR PEIR determined buildout of the project has a potential to result in a significant impact with respect to construction activity associated with future development. Additionally, the PEIR determined estimated operational-source emissions for the proposed project will exceed the applicable SCAQMD thresholds for VOC and NOx. Future projects would be required to implement Mitigation Measure MM 4.1-1 and 4.1-2 which would reduce emissions to the extent feasible. However, it cannot be definitively stated that all future development projects would not exceed the applicable thresholds. As such, the project would result in a significant and unavoidable impact for construction and operational air emissions.

Future projects would be required to prepare, site-specific localized emissions analysis (LST) to address potential impacts from construction and operational activity, pursuant to Mitigation Measures MM 4.1-4 and MM 4.1-2. However, implementation of Mitigation Measures MM 4.1-1 and MM 4.1-2 cannot guarantee that future development projects would reduce all LST impacts to less than significant level. Additionally, construction activity would have the potential to result in carcinogenic and non-carcinogenic emissions associated with diesel exhaust from construction equipment. Therefore, impacts related to exposing sensitive receptors to a substantial pollutant increase would remain significant and unavoidable.

The HEIP PEIR determined buildout of the project would not include long-term sources of odors or other emissions (such as those leading to odors). Additionally, standard construction requirements, such as SCAQMD Rule 402, would minimize potential odor impacts from construction. Therefore, impacts related to odors were determined to be less than significant.

Impacts Associated with the Proposed Project
The following report was used to prepare this section:
• Air Quality and Greenhouse Gas Impact Analysis for the 19081 Yorba Linda Boulevard Residential Project.

Prepared by EPD Solutions, Inc. on August 4, 2025. (Appendix F). a) Conflict with or obstruct implementation of the applicable air quality plan? No New Impact.

The Project site is located in the South Coast Air Basin (SCAB) and is under the jurisdiction of the SCAQMD.

The SCAQMD and the Southern California Association of Governments (SCAG) are responsible for preparing the AQMP, which addresses federal and State Clean Air Act (CAA) requirements. The AQMP details goals, policies, and programs for improving air quality in the Basin. The HEIP PEIR analyzed project consistent with the 2016 AQMP which was adopted at the time the HEIP PEIR was written. However, the current AQMP is the 2022 AQMP, adopted in December 2022. For purposes of analyzing consistency with the AQMP, if a proposed project would result in growth that is substantially greater than what was anticipated, then the proposed project would conflict with the AQMP. On the other hand, if a project’s resulting growth is within the anticipated growth of a jurisdiction, its emissions would be consistent with the assumptions in the AQMP, and the project would not conflict with SCAQMD’s attainment plans (Consistency Criterion No. 1). In addition, the SCAQMD considers a project consistent with the AQMP if the project would not result in an increase in the frequency or severity of existing air quality violations or cause a new violation (Consistency Criterion No. 2).

The SCAB is in a non-attainment status for federal ozone standards, federal carbon monoxide standards, and State and federal particulate matter standards. Any development in the SCAB, including the proposed Project, could cumulatively contribute to these pollutant violations. Should construction or operation of the proposed Project exceed these thresholds a significant impact could occur; however, if estimated emissions are less than the thresholds, impacts would be considered less than significant.

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City of Yorba Linda Environmental Consistency Analysis
45 The HEIP PEIR assumed an average household size of 2.94 residents per unit and determined implementation of the additional dwelling units under the HEIP would result in a total population growth of approximately 7,085 residents. Using this household size figure, the Project would result in approximately 182 new residents.

As described in the HEIP PEIR, growth projections from local general plans adopted by cities in the district are provided to the SCAG, which develops regional growth forecasts, which are then used to develop future air quality forecasts for the AQMP. Thus, projects that are consistent with the growth projections in City of Yorba Linda General Plan are considered to be consistent with the AQMP. The Project site is zoned RM-20 which allows up to 20 du/ac. The Project proposes 62 units on the 2.64 acre site which would result in a density of 23 du/ac. However, the Project would restrict four units to very low income households, thus pursuant to State Density Bonus Law, the Project would quality for a 22.5 percent density bonus. Therefore, the Project would be consistent with the zoning for the site.

Furthermore, State law requires that the City accommodate their RHNA “fair share” of the region’s housing needs, which cannot be achieved without future residential development. Therefore, consistent with the analysis in the HEIP PEIR, since the purpose of the Project is to accommodate planned regional housing growth included in the SCAG RHNA, the Project would not induce substantial unplanned population growth in the City. As such, the proposed Project would be consistent with Consistency Criterion No. 1.

As discussed below, the emissions generated by the construction and operation of the proposed Project would not exceed thresholds, and the Project would not result in an increase in the frequency or severity of existing air quality violations or cause a new violation. As such, the proposed Project would be consistent with Consistency Criterion No. 2. Therefore, the Project would not conflict with implementation of an AQMP.

Therefore no new or more severe impacts related to conflict with implementation of an AQMP would occur compared to the findings of the HEIP PEIR.
b) 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 (including releasing emissions which exceed quantitative thresholds for ozone precursors)? No New Impact.

The SCAB is in non-attainment status for federal ozone standards, and State and federal particulate matter standards. The SCAB is designated as a maintenance area for federal PM10 standards. Any development in the SCAB, including the proposed Project could cumulatively contribute to these pollutant violations.

Evaluation of the cumulative air quality impacts of the proposed Project has been completed pursuant to SCAQMD’s cumulative air quality impact methodology. SCAQMD states that if an individual project results in air emissions of criteria pollutants (ROG, CO, NOx, SO2, PM10, and PM2.5 that exceed the SCAQMD’s recommended daily thresholds for project-specific impacts, then it would also result in a cumulatively considerable net increase of the criteria pollutant(s) for which the Project region is in non-attainment under an applicable federal or State ambient air quality standard. SCAQMD has established daily mass thresholds for regional pollutant emissions, which are shown in Table AQ-1.

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46 Table AQ-1: SCAQMD Regional Daily Emissions Thresholds Air Pollutant
Maximum Daily Emissions
(pounds/day)
Construction Operation
NOx 100 55
ROG 75 55
PM10 150 150
PM2.5 55 55
SO2 150 150
CO 550 550
Lead 3 3
Notes: NOx = nitrogen oxides, ROG = reactive organic gases, PM10 = particulate matter 10 microns in diameter, PM2.5 = particulate matter 2.5 microns in diameter, SO2 = sulfur dioxide, CO = carbon monoxide Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

Construction
Construction activities associated with the proposed Project would generate pollutant emissions from the following: (1) demolition, (2) site preparation, (3) grading, (4) building construction, (5) paving, and (6) architectural coating. The amount of emissions generated on a daily basis would vary, depending on the intensity and types of construction activities occurring.

It is mandatory for all construction projects to comply with several SCAQMD Rules, including Rule 403 for controlling fugitive dust, PM10, and PM2.5 emissions from construction activities. Rule 403 requirements include, but are not limited to, applying water in sufficient quantities to prevent the generation of visible dust plumes, applying soil binders to uncovered areas, reestablishing ground cover as quickly as possible, utilizing a wheel washing system to remove bulk material from tires and vehicle undercarriages before vehicles exit the Project site, covering all trucks hauling soil with a fabric cover and maintaining a minimum freeboard height of 12 inches, and maintaining effective cover over exposed areas.

Compliance with Rule 403 was accounted for in the construction emissions modeling. In addition, implementation of SCAQMD Rule 1113, which governs the volatile organic compound (VOC) content in architectural coating, paint, thinners, and solvents was accounted for in construction emissions modeling. As shown in Table AQ-2, the California Emissions Estimator Model (CalEEMod) results indicate maximum daily ROG emissions during construction would be 106.5 pounds/day, which exceeds the SCAQMD regional construction threshold of 75 pounds/day. However, the Project would be required to implement HEIP PEIR Mitigation Measure 4.1-1 which requires the use of low VOC paints which contain no more than 10 grams per liter of VOC. Table AQ-3 below shoes the results of construction emission with implementation of Mitigation Measure 4.1-1. As show, with implementation of Mitigation Measure 4.1-1, ROG emissions would be reduced to 22.5 pounds per day, which would be below the SCAQMD thresholds. Therefore, construction activities would not result in a cumulatively considerable net increase of any criteria pollutant and impacts would be less than significant. Therefore, no new impact related to construction emissions would occur.

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47 Table AQ-2: Regional Construction Emission Estimates Construction Year Maximum Daily Regional Emissions (pounds/day) ROG NOx CO SO2 PM10 PM2.5
Year 1 (2026) 2.0 33.8 23.8 0.1 7.1 3.0
Year 2 (2027) 106.5 10.4 14.7 0.0 1.0 0.5
Maximum Daily Emissions (2026-2027) 106.5 33.8 23.8 0.1 7.1 3.0 SCAQMD Significance Thresholds 75 100 550 150 150 55
Threshold Exceeded? Yes No No No No No
Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

Table AQ-3: Mitigated Regional Construction Emission Estimates Construction Year Maximum Daily Regional Emissions (pounds/day) ROG NOx CO SO2 PM10 PM2.5
Year 1 (2026) 2.0 33.8 23.8 0.1 7.1 3.0
Year 2 (2027) 22.5 10.4 14.7 0.0 1.0 0.5
Maximum Daily Emissions (2026-2027) 22.5 33.8 23.8 0.1 7.1 3.0 SCAQMD Significance Thresholds 75 100 550 150 150 55
Threshold Exceeded? No No No No No No
Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

Operation
Occupancy of the 62 residential units would result in long-term regional emissions of criteria air pollutants and ozone precursors associated with area sources, such as landscaping, applications of architectural coatings, and consumer products. However, operational vehicular emissions would generate a majority of the emissions generated from the Project.

Operational emissions associated with the proposed Project and the existing use were modeled using the CalEEMod Version 2022.1 land use emission model and compared to the SCAQMD operational emissions thresholds. Emissions associated with the operation of the proposed Project compared to the existing use are presented in Table AQ-4. As shown, operational emissions would be below SCAQMD’s thresholds. Therefore, the Project would result in no new impacts related to operational air quality emissions. As such, the proposed Project would result in no new impact or in a cumulatively considerable net increase of any criteria pollutant.

Table AQ-4: Regional Operational Emission Estimates
Operational Activity Maximum Daily Regional Emissions1 (pounds/day) ROG NOx CO SO2 PM10 PM2.5
Mobile 0.9 0.7 7.8 <0.1 2.0 0.5
Area 4.2 <0.1 3.5 <0.1 <0.1 <0.1
Energy <0.1 <0.1 <0.1 <0.1 <0.1 <0.1
Total Operational Emissions 5.1 0.8 11.3 <0.1 2.0 0.5
SCAQMD Significance Thresholds 55 55 550 150 150 55
Threshold Exceeded? No No No No No No
1The emissions provided account for the increased residential density at 23 du/ac.

Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

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48 c) Expose sensitive receptors to substantial pollutant concentrations? No New Impact.

The SCAQMD’s 2008 Final Localized Significance Threshold Methodology recommends the evaluation of localized NOx, CO, PM10, and PM2.5 construction-related impacts to sensitive receptors in the immediate vicinity of the Project site. Such an evaluation is referred to as a LST analysis. According to the SCAQMD’s Final Localized Significance Threshold Methodology, off-site mobile emissions from the Project should not be included in the emissions compared to the LSTs. SCAQMD has developed LSTs that represent the maximum emissions from a project that are not expected to cause or contribute to an exceedance of the most stringent applicable federal or State ambient air quality standards, and thus would not cause or contribute to localized air quality impacts. LSTs are developed based on the ambient concentrations of NOx, CO, PM10, and PM2.5 pollutants for each of the 38 source receptor areas (SRAs) in the Basin. The City of Yorba Linda is located within SRA 16 (North Orange County).

The localized thresholds for development projects were derived using the SCAQMD Fact Sheet for Applying CalEEMod to Localized Significance Threshold and Appendix C of the SCAQMD 2008 Final Localized Significance Threshold Methodology. The thresholds from SCAQMD are for 1-, 2-, or 5-acre sites, and distances of sensitive receptors for 25 to 500 meters (82 feet to 1,640 feet). Sensitive receptors can include residences, schools, playgrounds, childcare centers, athletic facilities. The nearest sensitive receptors to the Project site consist of single-family residences located adjacent to the north and south of the Project site and, approximately 4.5 meters (15 feet) north of the Project boundary. Additionally, Jessamyn West Park is located approximately 15 feet east of the Project boundary. Therefore, the distance for sensitive receptors in the assessment was set at the lowest distance of 25 meters (82 feet). The construction phase with the most ground disturbance would be the site preparation phase, with 2 acres per day of grading, thus the SCAQMD thresholds for 2 acres were used.

Construction
Construction of the proposed Project may expose nearby sensitive receptors to airborne particulates as well as a small quantity of construction equipment pollutants (i.e., usually diesel-fueled vehicles and equipment).

However, construction contractors would be required to implement measures to reduce or eliminate emissions by following SCAQMD’s standard construction practices. Rule 402 requires implementation of dust suppression techniques to prevent fugitive dust from creating a nuisance off site. Rule 403 requires that fugitive dust be controlled with best available control measures so that the presence of such dust does not remain visible in the atmosphere beyond the property line of the emission source. As shown in Table AQ-5, Project construction-source emissions would not exceed SCAQMD LSTs and impacts at the nearest sensitive receptors would be less than significant. Accordingly, sensitive receptors located at greater distances from the Project site, including the North County Chabad Center to the west, would experience pollutant concentrations below those evaluated at the nearest receptors. Impacts at the North County Chabad Center and other more distant receptors would therefore also be less than significant.

Table AQ-5: Localized Construction Emissions
Construction Year
Maximum Daily Regional Emissions
(pounds/day)
NOx CO PM10 PM2.5
Year 1 (2026) 15.8 15.6 3.0 1.7
Year 2 (2027) 5.7 8.2 0.2 0.2
Maximum Daily Emissions (2026-2027) 15.8 15.6 3.0 1.7
SCAQMD LST Screening Thresholds 170 883 7 4

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49 Threshold Exceeded? No No No No
Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

Operation
According to the SCAQMD LST methodology, LSTs apply to project-related stationary mobile sources.

Projects that involve mobile sources that spend long periods queuing and idling at a site, such as transfer facilities or warehousing and distribution buildings, have the potential to exceed the operational LSTs. The Project would operate as a residential development which does not typically involve diesel vehicles regularly idling or queueing for long periods. Therefore, due to the lack of significant stationary source emissions or idling diesel-powered vehicles, impacts related to operational LSTs are presumed to be less than significant. d) Result in other emissions (such as those leading to odors) adversely affecting a substantial number of people?
No New Impact.

The proposed Project would not generate other emissions, not described previously. According to the SCAQMD CEQA Air Quality Handbook, land uses associated with odor issues include agricultural uses, wastewater treatment plants, food processing plants, chemical plants, composting activities, refineries, landfills, dairies, and fiberglass molding operations. The proposed Project would develop and operate a residential uses with a small portion of recreational space, which would not involve the types of uses that lead to odors.

Potential odor sources associated with the proposed Project may result from construction equipment exhaust and the application of asphalt and architectural coatings during construction activities and the temporary storage of typical solid waste (refuse) associated with the proposed Project’s operational uses. The construction odor emissions would be temporary, short-term, and intermittent in nature and would cease upon completion of construction.

The proposed Project would also be required to comply with SCAQMD Rule 402 to prevent occurrences of public nuisance odors. Therefore, other emissions (such as those leading to odors) that could adversely affect a substantial number of people would not occur from the proposed Project. No new impact would occur.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding air quality. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

Because none of the conditions identified in State CEQA Guidelines Section 15162 would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts, the Project is consistent with the HEIP PEIR.

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50 Plans, Programs, or Policies (PPP)
PPP AQ-1: Rule 402. The Project is required to comply with the provisions of South Coast Air Quality Management District (SCAQMD) Rule 402. The Project shall not discharge from any source whatsoever such quantities of air contaminants or other material which cause injury, detriment, nuisance, or annoyance to any considerable number of persons or to the public, or which endanger the comfort, repose, health or safety of any such persons or the public, or which cause, or have a natural tendency to cause, injury or damage to business or property.

PPP AQ-2: Rule 403. The Project is required to comply with the provisions of South Coast Air Quality Management District (SCAQMD) Rule 403, which includes the following:
• All clearing, grading, earth-moving, or excavation activities shall cease when winds exceed 25 mph per SCAQMD guidelines in order to limit fugitive dust emissions. • The contractor shall ensure that all disturbed unpaved roads and disturbed areas within the Project are watered, with complete coverage of disturbed areas, at least 3 times daily during dry weather; preferably in the mid-morning, afternoon, and after work is done for the day. • The contractor shall ensure that traffic speeds on unpaved roads and Project site areas are reduced to 15 miles per hour or less.

PPP AQ-3: Rule 1113. The Project is required to comply with the provisions of South Coast Air Quality Management District Rule (SCAQMD) Rule 1113. Only “Low-Volatile Organic Compounds” paints (no more than 50 gram/liter of VOC) and/or High Pressure Low Volume (HPLV) applications shall be used.

PPP AQ-4: Rule 445—Wood-Burning Devices. This rule prohibits permanently installed wood burning devices in any new development. A wood burning device means any fireplace, wood burning heater, or pellet-fueled wood heater, or any similarly enclosed, permanently installed, indoor or outdoor device burning any solid fuel for aesthetic or space-heating purposes, which has a heat input of less than one million British thermal units per hour.

HEIP PEIR Mitigation Measures
MM 4.1-1 Prior to issuance of grading permits, project applicants shall prepare and submit a technical assessment evaluating potential project construction-related air quality impacts (regional and localized) to the City for review and approval. The evaluation shall be prepared in conformance with South Coast Air Quality Management District (South Coast AQMD) methodology for assessing air quality impacts. If construction-related criteria air pollutants are determined to have the potential to exceed the South Coast AQMD’s adopted thresholds of significance, the City shall require that applicants for new development projects incorporate all feasible mitigation measures to reduce air pollutant emissions below the significant threshold during construction activities. These identified measures shall be incorporated into all appropriate construction documents (e.g., construction management plans) submitted to the City and shall be verified by the City. Mitigation measures to reduce construction-related emissions could include, but are not limited to:
• Require construction equipment that meets or exceeds CARB Certified Tier 3 or Tier 4 engine standards.
• Limit the idling time of diesel off-road construction equipment to no more than five (5) minutes.
• Require the use of “Super-Compliant” low VOC paints which have been reformulated to exceed the regulatory VOC limits put forth by South Coast AQMD’s Rule 1113. SuperCompliant low VOC paints shall be no more than 10g/L of VOC. Alternatively, projects may utilize building materials that do not require the use of architectural coatings.

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51 • The Construction Contractor shall require by contract specifications that construction operations rely on the electricity infrastructure surrounding the construction site, if available rather than electrical generators powered by internal combustion engines. • The Construction Contractor shall require the use of alternative fueled, engine retrofit technology, after-treatment products (e.g., diesel oxidation catalysts, diesel particulate filters), and/or other options as they become available, including all off-road and portable diesel-powered equipment.
• The Construction Contractor shall require that construction equipment be maintained in good operation condition to reduce emissions. The Construction Contractor shall ensure that all construction equipment is being properly serviced and maintained as per the manufacturer’s specification. Maintenance records shall be available at the construction site for City verification.

Proposed Project Applicability: MM 4.1-1 has been partially satisfied by the Air Quality, Energy, and Greenhouse Gas Impact Analysis prepared for the proposed Project and included as Appendix F. This mitigation measure will be incorporated into the MMRP.

MM 4.1-2 Prior to issuance of a grading permit, project applicants shall prepare and submit a technical assessment evaluating potential project operation air quality impacts (regional and localized) to the City for review and approval. The evaluation shall be prepared in conformance with South Coast Air Quality Management District (South Coast AQMD) methodology in assessing air quality impacts. If operation-related air pollutants are determined to have the potential to exceed the South Coast AQMD’s adopted thresholds of significance, the City shall require that applicants for new development projects incorporate all feasible mitigation measures to reduce air pollutant emissions below significance thresholds during operational activities. The identified measures shall be included as part of the conditions of approval.

Possible mitigation measures to reduce operational emissions could include, but are not limited to the following:
• Increase in insulation such that heat transfer and thermal bridging is minimized; • Limit air leakage through the structure and/or within the heating and cooling distribution system;
• Use of energy-efficient space heating and cooling equipment; • Installation of electrical hook-ups at loading dock areas; • Installation of dual-paned or other energy efficient windows; • Use of interior and exterior energy efficient lighting that exceeds then incumbent California Title 24 Energy Efficiency performance standards; • Installation of automatic devices to turn off lights where they are not needed; • Application of a paint and surface color palette that emphasizes light and off-white colors that reflect heat away from buildings;
• Design of buildings with “cool roofs” using products certified by the Cool Roof Rating Council, and/or exposed roof surfaces using light and off-white colors; • Design of buildings to accommodate photo-voltaic solar electricity systems or the installation of photo-voltaic solar electricity systems; • Installation of ENERGY STAR-qualified energy-efficient appliances, heating and cooling systems, office equipment, and/or lighting products.
• Landscaping palette emphasizing drought tolerant plants; • Use of water-efficient irrigation techniques;
• U.S. EPA Certified WaterSense labeled or equivalent faucets, high-efficiency toilets (HETs), and water-conserving shower heads.

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52 • Applicants for residential within 1,000 feet of a major sources of TACs (e.g., warehouses, industrial areas, freeways, roadways, and rail lines with traffic volumes over 10,000 vehicle per day), as measured from the property line of the project to the property line of the source/edge of the nearest travel lane, shall submit a health risk assessment (HRA) to the City of Yorba Linda prior to future discretionary Project approval. The HRA shall be prepared in accordance with policies and procedures of CEQA and the South Coast AQMD. If the HRA shows that the incremental cancer risk exceeds ten in one million (10E-06), PM10 concentrations exceed 2.5 microgram per cubic meter (μg/m3), PM2.5 concentrations exceed 2.5 μg/m3, or the appropriate noncancer hazard index exceeds 1.0, the applicant will be required to identify and demonstrate that mitigation measures are capable of reducing potential cancer and non-cancer risks to an acceptable level (i.e., below ten in one million or a hazard index of 1.0), including appropriate enforcement mechanisms. Measures to reduce risk may include but are not limited to:
• Air intakes located away from high volume roadways and/or truck loading zones. • Heating, ventilation, and air conditioning systems of the buildings provided with appropriately sized maximum efficiency rating value (MERV) filters (e.g., MERV 13 or better)
Proposed Project Applicability: MM 4.1-2 has been partially satisfied by the Air Quality, Energy, and Greenhouse Gas Impact Analysis prepared for the proposed Project and included as Appendix F. This mitigation measure will be incorporated into the MMRP.

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53 5.2. BIOLOGICAL RESOURCES
Would the project: Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Information
Identifying
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No New
Impact/
No
Impact
a) 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 Wildlife or U.S. Fish and
Wildlife Service?
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 California
Department of Fish and Wildlife or US Fish and
Wildlife Service?
c) Have a substantial adverse effect on
federally protected wetlands (including, but not
limited to, marsh, vernal pool, coastal, etc.)
through direct removal, filling, hydrological
interruption, or other means?
d) 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?
e) Conflict with any local policies or ordinances
protecting biological resources, such as a tree
preservation policy or ordinance?
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?

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54 Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to biological resources under Section 4.2. The HEIP PEIR determined that there are two housing opportunity sites (Site S5-008 and Site S7-005) that are located within a natural habitat area. Therefore, future development on these two sites could result in impacts to sensitive or protected biological resources. However, implementation of Mitigation Measures MM 4.2-1 through MM 4.2-4 would ensure the project’s potential impacts to sensitive or protected biological resources be mitigated through biological surveys and impact assessments by a qualified biologist. With implementation of the required mitigation and General Plan goals and policies, the project’s potential impacts to sensitive or protected biological resources would be reduced to less than significant.

There is a forested/shrub riparian habitat within housing opportunity Site S3-203. Additionally, there are four areas of wetlands within the housing opportunity sites (Freshwater pond and riverine habitat on Site S7-005; Riverine habitat on Site S5-008; Freshwater Forested/Shrub Wetland and Riverine habitat on Site S4-053; and Freshwater Forested/Shrub Wetland and Riverine habitat on Site S3-203). Future projects on these sites would be required to implement MM 4.2-1 through MM 4.2-4. Additionally, implementation of Mitigation Measure MM 4.2-5 would ensure the project’s potential impacts to riparian habitats and wetlands be mitigated through obtaining appropriate permit authorization(s). With implementation of the required mitigation and General Plan goals and policies, the project’s potential impacts to riparian habitats and wetlands would be reduced to less than significant.

The HEIP PEIR determined existing development in the City limits regional connectivity to other habitat areas; therefore, future developments undertaken in accordance with the project would not impact wildlife movement corridors. Additionally, future developments would be required to comply with the Migratory Bird Treaty Act (MBTA), which would ensure impacts to migratory birds would not occur. Therefore, the Project would not 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, and impacts would be less than significant.

Trees in the City of Yorba Linda are protected under YLMC Chapter 16.08 (Tree Preservation), which regulates the planting, maintenance, and removal of trees in the City. Future development would be required to comply with provisions of the City’s Municipal Code, and impacts would be less than significant.

None of the housing opportunity sites are located within the boundaries of a Natural Community Conversation Plan/Habitat Conservation Plan (NCCP/HCP). Therefore, the Project would not conflict with the provisions of approved local, or State habitat conservation plan or natural community conservation plan and no impact would occur.

Impacts Associated with the Proposed Project
This section was prepared using the following report:
• Biological Resources Assessment for the Proposed Project Located at 19081 Yorba Linda Boulevard in the City of Yorba Linda, Orange County, California. Prepared by ELMT Consulting, June 27, 2025. (Appendix G).
a) 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 Wildlife or U.S. Fish and Wildlife Service? No New Impact.

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55 A Biological Resources Assessment (BRA) was prepared for the proposed Project, which included a field survey conducted on May 21, 2025 (Appendix G). The BRA described that the Project site consists of two land cover types: agricultural/ornamental and developed. The literature search identified eight (8) specialstatus plant species, forty-three (43) special-status wildlife species, and three (3) special-status plant communities as having potential to occur within the vicinity of the Project site. These include those species listed or candidates for listing by the United States Fish and Wildlife Service (USFWS), California Department of Fish and Wildlife (CDFW) and California Native Plant Society (CNPS). During the field survey, all habitats with the potential to be used by sensitive species were evaluated during the field survey for their presence or potential presence.

Special-Status Plant Species and Communities
None of the eight special-status plant species or any of the three special-status plant communities that have potential to occur in the region were identified on the Project site during the field survey. The BRA determined that due to historic and existing land uses, no native habitat that could support special status plant species or plant communities are present within or adjacent to the project site. Thus, based on habitat requirements for specific species and the availability and quality of on-site habitats, it was determined no special-status plant species would be impacted by implementation of the proposed Project (Appendix G).

Special-Status Animal Species
None of the 43 special-status animal species that have potential to occur in the region were identified on the site during the field survey. Past development and anthropogenic disturbances on the Project site have eliminated the natural plant communities that once occurred on-site which have greatly reduced potential foraging opportunities for wildlife species. However, based on habitat requirements for specific species and the availability and suitable habitats, the BRA determined that the Project site has a high potential to support Cooper’s hawk and sharp-shinned hawk. Consistent with the analysis in the HEIP PEIR, the Project would require compliance with the MBTA, which prohibits the take of nesting birds and recommends preconstruction nesting bird surveys to be conducted if construction occurs during the nesting bird season between February through August. In order to comply with the MBTA, the Project Applicant/Contractor would conduct preconstruction nesting bird surveys three days prior to vegetation removal during the nesting bird season (generally February 1 through September 15 (PDF BIO-1). Therefore, with adherence to the provisions of the MBTA, potential impacts related to nesting birds, including Cooper’s hawk and sharp-shinned hawk, would be less than significant.

The Project site is located within an urbanized area. Consistent with the findings of the HEIP PEIR, no endangered, rare, threatened, or special status plant species (or associated habitats) or wildlife species designated by the USFWS, CDFW, or CNPS are known to occur on or adjacent to the site. As such, no new or more sever impacts to candidate, sensitive, or special status species would occur as a result of the proposed Project.
b) Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, or regulations, or by the California Department of Fish and Wildlife or U.S. Fish and Wildlife Service?
No New Impact.

Riparian habitats are those occurring along the banks of rivers and streams. Sensitive natural communities are natural communities that are considered rare in the region by regulatory agencies, known to provide habitat for sensitive animal or plant species, or known to be important wildlife corridors. As described above, the Project site has been heavily disturbed through past development and land uses. No riparian habitat or other sensitive natural community exists on the site (Appendix G). The HEIP PEIR also confirms that the Project site (Housing Opportunity Site S4-204B) does not contain a sensitive natural community or riparian habitat

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56 (City of Yorba Linda, 2022). Therefore, no new or more severe impact related to riparian habitat or other sensitive natural communities as identified in local or regional plans, policies, or regulations, or by the CDFW or USFWS would occur.
c) 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?
No New Impact.

Wetlands are defined under the federal Clean Water Act as land that is flooded or saturated by surface water or groundwater at a frequency and duration sufficient to support, and that normally does support, a prevalence of vegetation adapted to life in saturated soils. Wetlands include areas such as swamps, marshes, and bogs. As described above, the Project site has been heavily disturbed through past development and land uses. No wetlands exist on site (Appendix G). The HEIP PEIR also confirms that the Project site does not contain any wetlands (City of Yorba Linda, 2022). Further, the Project site does not contain any jurisdictional areas that would be subject to Section 404 of the Clean Water Act, and the proposed Project does not involve any hydrological interruption on any existing water resources. Therefore, the redevelopment of the Project site would not result in impacts to wetlands. No new or more severe impact would occur. d) 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?
No New Impact.

Wildlife corridors are linear features that connect areas of open space and provide avenues for the migration of animals and access to additional areas of foraging. The Project site does not contain, and is not adjacent to, any wildlife corridors. The Project site is surrounded by roadways and developed areas.

Development of the site would not result in impacts related to established native resident or migratory wildlife corridor and no new impact would occur.

The Project site contains ornamental trees that would be removed during redevelopment of the site. Although the trees are mainly ornamental and nonnative, they may provide suitable habitat, including nesting habitat, for migratory birds protected under the MBTA. In order to comply with the MBTA, the Project Applicant/Contractor would conduct pre-construction nesting bird surveys three days prior to vegetation removal during the nesting bird season (generally February 1 through September 15 (PDF BIO-1). Therefore, with adherence to the provisions of the MBTA, potential impacts related to nesting birds would be less than significant. With adherence to the MBTA and PDF BIO-1, the proposed Project would result in less-thansignificant impact related to nesting birds. No new or more severe impact would occur. e) Conflict with any local policies or ordinances protecting biological resources? No New Impact.

As part of Project implementation, the existing ornamental landscaping on the Project site would be removed and new landscaping would be planted. Trees in the City of Yorba Linda are protected under the YLMC Chapter 16.08 (Tree Preservation), which regulates the planting, maintenance, and removal of trees in the City. The Project would not involve the removal of trees in City right-of-way. Therefore, impacts related to the removal and planting of trees on the Project site would be less than significant. Therefore, the proposed Project would not conflict with any local policies or ordinances protecting biological resources and impacts would be less than significant. No new or more severe impact would occur.

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57 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? No New Impact.

The City Yorba Linda is a participating jurisdiction to the Orange County Central‐Coastal NCCP/HCP (City of Yorba Linda, 2022). However, the housing opportunity sites, including the proposed Project site, are not located within the boundaries of the NCCP/HCP. Therefore, the Project would not conflict with the provisions of approved local, or State habitat conservation plan or natural community conservation plan. No new or more severe impact would occur.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding biological resources. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

Project Design Features
PDF BIO-1: In order to comply with the Migratory Bird Treaty Act (MBTA), the Project Applicant/Contractor would conduct pre-construction nesting bird surveys three days prior to vegetation removal during the nesting bird season (generally February 1 through September 15).

HEIP PEIR Mitigation Measures
MM 4.2-1 The City of Yorba Linda shall require applicants of future development projects on housing opportunity sites S5-008, S7-005, S3-203, and S4-053 to prepare a biological resources survey. The survey shall be conducted by a qualified biologist and shall be a reconnaissance level field survey of the sites for the presence and quality of biological resources potentially affected by project development. These resources include, but are not limited to, special status species or their habitat, sensitive habitats such as wetlands or riparian areas, and jurisdictional waters. If sensitive or protected biological resources are absent from the sites and adjacent lands potentially affected by the future development, the biologist shall submit a written report substantiating such to the City of Yorba Linda before issuance of a grading permit by the City, and the project may proceed without any further biological investigation.

If sensitive or protected biological resources are present on the project site or may be potentially affected by the project, implementation of Mitigation Measure MM 4.2-2 shall be required.

Proposed Project Applicability: The Project site is not included on housing opportunity sites S5-008, S7-005, S3-203, and S4-053. However, a Biological Resources Assessment was prepared for the site (included as Appendix G) which determined there are no sensitive species or habitats on the Project site.

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58 MM 4.2-2 A qualified biologist shall evaluate impacts to sensitive or protected biological resources from development. The impact assessment may require focused surveys that determine absence or presence and distribution of biological resources on the site. These surveys may include, but are not limited to: 1) focused special status animal surveys if suitable habitat is present; 2) appropriately timed focused special status plant surveys that will maximize detection and accurate identification of target plant species; and 3) a delineation of jurisdictional boundaries around potential wetlands, riparian habitat, and waters of the United States or State.

Proposed Project Applicability: MM 4.2-2 is not applicable to the proposed Project because the Project site does not contain native biological resources (Appendix G).

MM 4.2-3 The results of these surveys will assess project impacts and develop site specific mitigation measures to avoid impacts to sensitive or protected biological resources. Depending on the resources potentially present on the project site, avoidance may include: 1) establishing appropriate no-disturbance buffers around onsite or adjacent resources, and/or 2) initiating construction at a time when special status or protected animal species will not be vulnerable to project-related mortality (e.g., outside the avian nesting season or bat maternal or wintering roosting season). Consultation with relevant regulatory agencies may be required in order to establish suitable buffer areas. The qualified biologist shall substantiate the impact evaluation or the assumed presence of special-status species in all suitable habitats onsite in a written report submitted to the City of Yorba Linda before issuance of a grading permit by the City. If the project avoids all sensitive or protected biological resources, no further action is required. If avoidance of all significant impacts to sensitive or protected biological resources is not feasible, the project shall implement Mitigation Measure MM 4.2-

4. Proposed Project Applicability: MM 4.2-3 is not applicable to the proposed Project because the Project site does not contain native biological resources (Appendix G).

MM 4.2-4 The City of Yorba Linda shall require applicants to design development projects to minimize potential impacts to sensitive or protected biological resources to the greatest extent feasible, in consultation with a qualified biologist and/or appropriate regulatory agency staff. Minimization measures may include 1) exclusion and/or silt fencing, 2) relocation of impacted resources, 3) construction monitoring by a qualified biologist, and 4) an informative training program conducted by a qualified biologist for construction personnel on sensitive biological resources that may be impacted by project construction. If minimization of all significant impacts to sensitive or protected biological resources is infeasible, the project shall implement Mitigation Measure MM 4.2-5.

Proposed Project Applicability: MM 4.2-4 is not applicable to the proposed Project because the Project site does not contain native biological resources (Appendix G).

MM 4.2-5 A qualified biologist will develop appropriate mitigations that will reduce project impacts to sensitive or protected biological resources to a less than significant level. The type and amount of mitigation will depend on the resources impacted, the extent of the impacts, and the quality of habitats to be impacted. Mitigations may include, but are not limited to: 1) compensation for lost habitat or waters in the form of preservation or creation of in-kind habitat or waters, either onsite or offsite, protected by conservation easement; 2) purchase of appropriate credits from an approved mitigation bank servicing the Yorba Linda area; and 3) payment of in-lieu fees. Furthermore, project applicants shall obtain appropriate permit authorization(s) for impacts to jurisdictional waters, wetlands, and/or riparian

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59 habitats. The types of permits potentially required for impacts to jurisdictional waters are a Clean Water Act (Section 404) permit issued by the US Army Corps of Engineers, a California Water Certificate or Waste Discharge Order issued by the Regional Water Quality Control Board, and a Stream Alteration Agreement issued by the California Department of Fish and Wildlife.

Proposed Project Applicability: MM 4.2-5 is not applicable to the proposed Project because the Project site does not contain native biological resources (Appendix G).

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60 5.3. ENERGY
Would the project: Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Information
Identifying
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No New
Impact/
No
Impact
a) Result in potentially significant environmental
impacts due to wasteful, inefficient, or
unnecessary consumption of energy resources,
during project construction or operation?
b) Conflict with or obstruct a State or local plan
for renewable energy or energy efficiency?
Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to energy under Section 4.3. The HEIP PEIR describes that future development of the 27 Housing Opportunity Sites would energy during construction and operation. However, the amount of energy to be consumed during construction will be limited to the construction period and would be supplied to the site by existing infrastructure. Additionally, future development would be required to comply with best management practices for construction activity, and would not result in the wasteful, inefficient, or unnecessary consumption of energy resources during construction. Therefore, impacts to energy during construction would be less than significant.

Energy consumption in support of or related to project operations would include transportation energy demands (energy consumed by passenger car and truck vehicles accessing the project site) and facilities energy demands (energy consumed by building operations and site maintenance activities). The HEIP PEIR estimates the project will result in 63,832,385 annual vehicle miles traveled (VMT) and an estimated annual fuel consumption of 2,680,177 gallons of fuel. Project facility operational energy demands are estimated at 8,834,660 thousand British Thermal Units per year (kBTU/year) of natural gas and 26,767,491 kilowatthours per year (kWh/year) of electricity. The HEIP PEIR describes that the project would allow for conventional residential uses which would use comparable amounts of energy to other residential uses of similar scale and configuration. Therefore, operational energy use was determined to be less than significant.

Additionally, the HEIP PEIR describes that future projects would be required to comply with existing energy standards such as the California Title 24 energy standards and the 2022 CALGreen building code.

Compliance with State and local energy efficiency standards would ensure that the project meets all applicable energy conservation policies and regulations. Therefore, impacts related to conflict with plans for energy efficiency were determined to be less than significant.

Impacts Associated with the Proposed Project
The following report was used to prepare this section:

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61 • Air Quality and Greenhouse Gas Impact Analysis for the 19081 Yorba Linda Boulevard Residential Project.

Prepared by EPD Solutions, Inc. on July 11, 2025. (Appendix F). a) Result in potentially significant environmental impact due to wasteful, inefficient, or unnecessary consumption of energy resources, during project construction or operation? No New Impact.

Construction activities related to the proposed residences and the associated infrastructure are not expected to result in demand for fuel greater on a per-development basis than other development projects in Southern California. Due to the Project size and the fact that construction is temporary, the electricity used during construction of the proposed Project would be substantially less than that required for Project operation and would have a negligible contribution to the Project’s overall energy consumption. The electric power used would be for as-necessary lighting and electronic equipment such as computers inside temporary construction trailers and electrical powered equipment. Natural gas is not anticipated to be needed for construction activities. Any consumption of natural gas would be minor and negligible in comparison to the usage during the operation of the proposed Project. Since operation of the Project would result in a nominal increase of Countywide electricity and natural gas consumption, as described below, construction energy consumption would be less than significant.

The equipment associated with construction activities (off-road/heavy duty vehicles) would rely on diesel fuel as would vendor and haul trucks involved in delivering building materials and removing soil material from the Project site. Construction workers would travel to and from the Project site throughout the duration of construction, and for a conservative analysis, it is assumed that construction workers would travel in gasoline-powered passenger vehicles. It should be noted that total fuel consumption is a conservative analysis and would likely overstate the amount of fuel usage, as specific construction equipment is not expected to operate during the entire duration of the construction activity (i.e., crane). The trips included worker vehicles, vendor vehicles, and haul vehicles. Table E-1, shows the overall fuel consumption for Project construction, obtained from the CARB OffRoad 2021 emission model and the CARB EMFAC2021 model.

As shown in Table E-1, the Project is estimated to consume a total of approximately 34,310 gallons of diesel fuel and approximately 15,835 gallons of gasoline fuel during construction. According to the projected 2026 fuel consumption data obtained from EMFAC2021 for Orange County, on-road vehicles would consume approximately 227,267,688 gallons of diesel fuel and 447,487,235 gallons of gasoline. On-road construction vehicles from the proposed Project would account for 0.2 percent of diesel fuel consumption and

0.01 percent gasoline fuel consumption within Orange County in 2026. Off-road consumption within Orange County in 2026 would total approximately 14,157,699 gallons of diesel fuel and 977,564 gallons of gasoline fuel. Off-road construction equipment from the proposed Project would account for 1.6 percent of diesel consumption within Orange County in 2026. As such, Project construction would have a negligible effect on energy supplies within Orange County. Additionally, the Project would be required to comply with regulations implemented to reduce emissions from construction, such as CARB Rule 2485 as set forth in California Code of Regulations (CCR) Title 13, Section 2485, which limits idling times of construction vehicles to no more than 5 minutes (PPP E-1). Thus, the Project would not result in wasteful, inefficient, or unnecessary consumption of energy and impacts related to construction energy usage would be less than significant.

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62 Table E-1: Estimated Construction Fuel Usage
Source Diesel Fuel (Gallons) Gasoline Fuel (Gallons)
Proposed Project On-Road Construction Vehicles 13,392 15,835 Proposed Project Off-Road Construction Equipment 20,919 - Proposed Project Total Consumption 34,310 15,835
Orange County On-Road Vehicles 227,267,688 447,487,235
Orange County Off-Road Construction Equipment 14,157,699 977,564 On-Road Project Percentage (%) 0.2 0.01
Off-Road Project Percentage (%) 1.6 -
Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

Once operational, the Project would generate demand for electricity and gasoline for fuel tanks.

Operational use of energy includes the heating, cooling, and lighting of the residences, water heating, operation of electrical systems and plug-in appliances, parking lot and outdoor lighting, and the transport of electricity and water to the areas where they would be consumed. This use of energy is typical for urban development, and no operational activities or land uses would occur that would result in extraordinary energy consumption. As detailed in Table E-2, operation of the proposed Project would use approximately 1,839,497 kWh/year of electricity and approximately 261,151 gallons of gasoline annually. Table E-2 also lists the most recent data available for electricity usage in Orange County (2023) from the California Energy Commission. When compared to overall electricity usage in the County, the proposed Project would result in a 0.001 percent increase in residential electricity consumption. Gasoline consumption in Orange County in 2026 is estimated at 1,114,083,928 gallons. Therefore, the proposed Project would account for

0.01 percent of gasoline fuel consumption in Orange County. Thus, the Project would not result in wasteful, inefficient, or unnecessary consumption of energy and operational energy impacts would be less than significant.

Table E-2: Annual Project Operational Energy Consumption Electricity (Kilowatt-Hours)
Proposed Project 1,839,497
Orange County (2023) 18,759,000,000
Project Percent Increase (%) 0.001
Petroleum (Gasoline) Consumption (Gallons)
Proposed Project 261,151
Orange County (2026) 1,114,083,928
Project Percent Increase (%) 0.01
Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

Further, the State of California provides a minimum standard for building design and construction standards through Title 24 of the CCR. Compliance with Title 24 is mandatory at the time new building permits are issued by the City (PPP E-2). The City’s administration of the Title 24 requirements includes review of design components and energy conservation measures that occurs during the permitting process, which ensures that all requirements are met. In complying with the Title 24 standards, Project impacts related to peak energy usage periods would be minimized and impacts on statewide and regional energy needs would be reduced.

Typical Title 24 measures include insulation; use of energy-efficient heating, ventilation and air conditioning

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63 equipment (HVAC); energy-efficient indoor and outdoor lighting systems; and requirements to install solar and be electric storage system (ESS) ready, etc. Regarding solar power, building roofs would include solar panels, consistent with the requirements of Title 24 standards. The exact size of the photovoltaic system will be based on the available roof area and the condition floor area per Title 24 standards. Thus, operation of the Project would not use large amounts of energy or fuel in a wasteful manner, and no new or more severe energy impacts would occur.
b) Conflict with or obstruct a State or local plan for renewable energy or energy efficiency? No New Impact.

The California Title 24 Building Energy Efficiency Standards and CALGreen standards are designed to ensure new and existing buildings achieve energy efficiency and preserve outdoor and indoor environmental quality. These measures (Title 24, Part 6 and Part 11) are listed in the CCR and are incorporated into the Project via PPP E-2. The California Energy Commission (CEC) is responsible for adopting, implementing and updating building energy efficiency. Local city and county enforcement agencies have the authority to verify compliance with applicable building codes, including energy efficiency. YLMC Chapter 15.10, Green Building Standards Code, adopted the Title 24 Building Energy Efficiency Standards. All development in the City, including the proposed Project, is required to comply with the adopted Title 24 requirements, which is ensured through the City’s development permitting process.

The CEC’s Integrated Energy Policy Report provides the results of the CEC’s assessments of a variety of energy issues facing California. The expected energy consumption during construction and operation of the proposed Project would be consistent with typical usage rates for industrial uses. Because California’s energy conservation planning actions are conducted at a regional level, and because the proposed Project’s total consumption of regional energy supplies would be minor, the proposed Project would not conflict with or obstruct California’s energy conservation plans as described in the CEC’s Integrated Energy Policy Report.

The California Renewables Portfolio Standard Program (RPS) requires California's energy providers to provide 60 percent renewable energy by 2030 and 100 percent by 2045 (SB 100). The statewide RPS requirements do not directly apply to individual development projects, but to utilities and energy providers such as SCE, whose compliance with RPS requirements would contribute to the State of California objective of transitioning to renewable energy. However, the Project would utilize electricity provided by SCE.

Therefore, the Project’s electricity usage would not conflict with the RPS Program. Therefore, the Project would not conflict with or obstruct a State or local plan for renewable energy or energy efficiency, and no new or more severe impact would occur.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding energy. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

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64 Plans, Programs, or Policies (PPP)
PPP E-1: California Air Resources Board (CARB) Rule 2485. As set forth in Title 13. CCR, Section 2485, Project construction shall comply with CARB Rule 2485, which minimizes truck engine idling to 5 minutes and requires 2008 and newer model year heavy-duty diesel engines to be fitted with automatic engine shutdown systems or to meet other specified idling emission standards.

PPP E-2: Title 24 Standards. The Project shall be designed in accordance with the applicable Title 24 Energy Efficiency Standards for Residential and Nonresidential Buildings (California Code of Regulations [CCR], Title 24, Part 6). These standards are updated, nominally every three years, to incorporate improved energy efficiency technologies and methods.

HEIP PEIR Mitigation Measures
No mitigation measures related to energy are included in the HEIP PEIR. Project impacts would be less than significant; therefore, no mitigation measures related to energy are required.

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65 5.4. GREENHOUSE GAS EMISSIONS
Would the project: Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Information
Identifying
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No New
Impact/
No
Impact
a) Generate greenhouse gas emissions, either
directly or indirectly, that may have a significant
impact on the environment?
b) Conflict with an applicable plan, policy or
regulation adopted for the purpose of reducing
the emissions of greenhouse gases?
Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to greenhouse gases (GHGs) under Section 4.4. The HEIP PEIR determined construction and operation of the 2,410 dwelling units proposed under the plan would result in a population growth of approximately 7,085 residents. The HEIP PEIR modeled estimated construction and operational GHG emission from buildout of the project and determined the project would generate a total of approximately 2.93 metric tons of carbon dioxide equivalent (MTCO2e) per service population (SP) per year. This would exceed the screening threshold of 1.44 MTCO2e/SP per year which was calculated for the project’s buildout year of 2045 by linear interpolation between SCAQMD’s 2020 target of 4.8 MTCO2e/yr and the 2050 target of 0.96 MTCO2e/yr. Thus, project-related emissions would have a potentially significant GHG impact. Future projects would be required to implement Mitigation Measures MM 4.1-1 and MM 4.1- 2 which require the preparation of project-specific construction and operational air quality analysis and incorporation of mitigation if emissions levels are shown to be above SCAQMD recommended thresholds of significance. However, it cannot be definitively known or stated at this time what level of emissions reductions future development projects occurring under implementation of the project would achieve through implementation of these mitigation measures. Therefore, impacts would remain significant and unavoidable.

The HEIP PEIR described that the project would not conflict the with any of the provisions of CARBs 2017 Scoping Plan and in fact supports seven of the action categories. However, since the project would exceed the efficiency based GHG emissions target, the Project has the potential to conflict with the 2017 Scoping Plan. Therefore, impacts would remain significant and unavoidable despite the implementation of applicable regulatory requirements and policies that have been incorporated with the intent of reducing GHG emissions and the incorporation of Mitigation Measures MM 4.1-1 and MM 4.1-2.

Impacts Associated with the Proposed Project
The following report was used to prepare this section:

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66 • Air Quality and Greenhouse Gas Impact Analysis for the 19081 Yorba Linda Boulevard Residential Project.

Prepared by EPD Solutions, Inc. on July 11, 2025. (Appendix F). a) Generate greenhouse gas emissions, either directly or indirectly, that may have a significant impact on the environment?
No New Impact
GHG Thresholds
The SCAQMD convened a GHG Emissions CEQA Significance Threshold Working Group to help lead agencies determine significance thresholds for GHG emissions when the SCAQMD is not the lead agency.

The last working group was held in September 2010 (Meeting No. 15) and proposed a tiered approach (Tier I to Tier V), equivalent to the existing consistency determination requirements in CEQA Guidelines Sections 15064(h)(3) or 15125(d) (SCAQMD, 2010). The applicable screening threshold tiers are described in further detail below.

Tier III – Numerical Screening Thresholds
The SCAQMD’s draft threshold uses the Executive Order S-3-05 goal as the basis for the Tier III screening level. Tier III consists of screening values which the lead agency can choose from, but it 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-level and cumulative-level impacts would be less than significant:

A. Option 1, all land use types: 3,000 MTCO2e per year
B. Option 2, based on land use type:
• Residential: 3,500 MTCO2e per year
• Commercial: 1,400 MTCO2e per year
• Mixed-use: 3,000 MTCO2e per year
Tier IV – Performance Standards (Sector-based Standard) For development projects that do not meet the Tier 3 screening threshold of 3,000 MTCO2e per year, the SCAQMD has developed Tier 4 thresholds for more detailed evaluation. These thresholds utilize an efficiency metric to analyze GHG emissions, based on GHG emitted per capita. The SCAQMD has adopted efficiencybased thresholds for two target dates: 2020 and 2035. Relative to the 2020 target date, SCAQMD has adopted a project-level Tier 4 threshold of 4.8 MTCO2e per service population (SP). Relative to the 2035 target date, SCAQMD has adopted a project-level Tier 4 threshold of 3.0 MTCO2e per SP.

Due to the large scale of the project, the HEIP PEIR evaluates impacts using the Tier IV, service population threshold. However, the HEIP PEIR calculated an interpolated threshold since its project horizon year (2045) is beyond the SCAQMD threshold of 3.0 MTCO2e per year per SP for a target year of 2035. First, the 2050 reduction target was determined by calculating the reduction target of 80 percent below 1990 levels by 2050, which equates to 0.96 MTCO2e per SP per year. Then, the service population threshold was interpolated for the Housing Element project’s target year of 2045, which equates to 1.44 MTCO2e per SP per year. Therefore, analysis of the proposed Project will discuss both the Tier III (3,000 MTCO2e per year) and IV (1.44 MTCO2e per SP per year) thresholds.

Construction
Global climate change is not confined to a particular project area. A typical project does not generate enough GHG emissions on its own to influence global climate change significantly; hence, the issue of global

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67 climate change is, by definition, a cumulative environmental impact. GHGs are produced by both direct and indirect emissions sources. Direct emissions include consumption of natural gas, heating and cooling of buildings, landscaping activities and other equipment used directly by land uses. Indirect emissions include the consumption of fossil fuels for vehicle trips, electricity generation, water usage, and solid waste disposal.

As described in Section 3.0, Project Description, construction of the proposed Project is anticipated to occur over approximately 12 months. Construction activities produce combustion emissions from various sources, such as site excavation, grading, utility engines, heavy-duty construction vehicles on-site, equipment hauling materials to and from the site, asphalt paving, and motor vehicles transporting the construction crew. Exhaust emissions from on-site construction activities would vary daily as construction activity levels change.

As discussed above, the SCAQMD does not have an adopted threshold of significance for construction related GHG emissions. However, lead agencies are required to quantify and disclose GHG emissions that would occur during construction. Total estimated GHG emissions from construction of the proposed Project were amortized over 30 years per SCAQMD methodology. As shown in Table GHG-1, it is estimated that the proposed Project would generate a total of approximately 439 metric tons of carbon dioxide equivalents (MTCO2e) during construction. When amortized over the 30-year life of the proposed Project, annual emissions would be 13 MTCO2e.

Table GHG-1: Project Construction GHG Emissions
Construction Year Annual GHG Emissions
(MTCO2e)
Year 1 (2026) 167
Year 2 (2027) 238
Total Emissions 405
Total Emissions Amortized Over 30 Years 13
Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

Operation
During operations, the proposed Project would generate long-term GHG emissions from mobile sources (e.g., vehicle trips), area sources (e.g., maintenance activities and landscaping), indirect emissions from sources associated with energy consumption, waste sources (land filling and waste disposal), and water sources (water supply and conveyance, treatment, and distribution).

The estimated operational GHG emissions that would be generated from implementation of the proposed Project are shown in Table GHG-2. As shown in Table GHG-2, the Project’s construction and operation GHG emissions would total 382 MTCO2e per year. Therefore, the Project would not exceed SCAQMD’s Tier III screening threshold.

Table GHG-2: Project Total GHG Emissions
Activity Annual GHG Emissions
(MTCO2e)
Mobile 310
Area 1
Energy 37
Water 6
Waste 14

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68 Activity Annual GHG Emissions
(MTCO2e)
Refrigeration <0.1
Gross Project Operation Emissions 368
Project Construction Emissions 13
Total Project Emissions 382
Tier III Significance Threshold 3,000
Threshold Exceeded? No
Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

SCAQMD’s Tier III threshold is a screening metric to determine a project’s GHG impacts. Further evaluation using the Tier IV threshold is only necessary if a project does not meet the Tier III screening threshold.

However, since the HEIP PEIR evaluates impacts based on the Tier IV threshold, the Project’s GHG emissions per capita is provided below.

As previously stated, based on the average household size of 2.94 persons per household used in the HEIP PEIR, the Project would result in approximately 182 persons. Thus, as shown in Table GHG-3, the proposed Project would result in 2.10 MTCO2e per capita, which exceeds the interpolated 2045 Target threshold of

1.44 MTCO2e per capita. Therefore, consistent with the HEIP PEIR, GHG emissions would be potentially significant.

Table GHG-3: Project GHG Emissions Per Capita
Activity Annual GHG Emissions (MTCO2e)
Total Project Emissions 382
Service Population 182
Project-Generated GHG per Service Population 2.10
Interpolated 2045 Significance Threshold 1.44
Tier IV Threshold Exceeded? Yes
Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

The proposed Project would be required to implement Mitigation Measure 4.1-2 from the 2022 Certified PEIR MMRP to reduce operational GHG emissions to the extent feasible. Consistent with MM 4.1-2, the Project Applicant would implement the following measures: (1) limiting air leakage through HVAC systems, (2) installing energy efficient windows, (3) meeting Title 24 lighting standards, (4) implementing cool roofs, (5) installing of photo-voltaic solar energy systems, (6) installing ENERGY STAR-qualified appliances, (7) using drought tolerant plants, (8) using water-efficient irrigation techniques, and (9) providing the option for automatic lighting. However, despite the GHG reductions that would result from implementation of MM 4.1- 2, approximately 84 percent of the Project’s operational GHG emissions are from mobile source emissions, such as residential vehicles traveling to and from the Project site. While there are some GHG reductions in mobile source emissions due to the increased residential density, there are no feasible mitigation measures available to further reduce the Project’s emissions. Therefore, the Project would have significant and unavoidable impacts to GHG emissions, consistent with the findings of the HEIP PEIR. No new or more severe impact would occur.

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69 b) Conflict with an applicable plan, policy or regulation adopted for the purpose of reducing the emissions of greenhouse gases?
No New Impact
In 2006, the California State Legislature adopted Assembly Bill (AB) 32, the California Global Warming Solutions Act of 2006. AB 32 requires CARB to adopt rules and regulations that would achieve GHG emissions equivalent to statewide levels in 1990 by 2020 through an enforceable statewide emission cap, which was phased in starting in 2012. In 2022, CARB updated their Scoping Plan to reflect a State GHG reduction target for 2045 at 85 percent below 1990 levels. Table GHG-4 below shows the Project’s consistency with the 2022 Scoping Plan. As described above, the Project meets the Tier III GHG threshold established by SCAQMD, but exceeds the Tier IV threshold used in the HEIP PEIR. Thus, consistent with the HEIP PEIR, while the Project would not conflict with the provisions of the Scoping Plan, since the Project would exceed the efficiency based GHG emissions target, the Project has the potential to conflict with the Scoping Plan. Therefore, no new or more severe impact would occur with implementation of the Project.

Table GHG-4: Project Consistency with CARB 2022 Scoping Plan Action Consistency
GHG Emissions Reductions Relative to the SB 32 Target
40% Below 1990 levels by 2030. Consistent. The Project would comply with Title 24 Part 6 building energy requirements along with other local and State initiatives that aim to achieve the 40% below 1990 levels by 2030 goal.

Smart Growth/Vehicle Miles Traveled VMT
VMT per capita reduced 25% below 2019 levels by
2030, and 30% below 2019 levels by 2045.

Consistent. The Project proposes the development of highdensity residentials which would include 4 units designated for very-low-income households. This reservation for
affordable units qualifies the Project for a 22.5 percent density bonus. As previously discussed in the air quality section, the Project would be consistent with the growth assumptions in the 2020 Connect SoCal, so the Project
would not interfere with the analysis completed for the Connect SoCal report outlining VMT reduction targets and measures.

Light-Duty Vehicle (LDV) Zero-Emission Vehicles (ZEVs)
100% of LDV sales are ZEV by 2035. Consistent. The proposed Project would be designed and constructed in accordance with Title 24 Part 6 and Part 11 requirements, which includes constructing homes to allow for electric vehicle charging.

New Residential and Commercial Buildings
All electric appliances beginning 2026 (residential)
and 2029 (commercial), contributing to 6 million heat
pumps installed statewide by 2030.

Consistent. The Project would comply with Title 24 Part 6 building energy requirements, which would require all inunit appliances for residential projects to be all-electric and Energy Star certified.

Construction Equipment
25% of energy demand electrified by 2030 and 75%
electrified by 2045.

Consistent. The proposed Project would be required to use construction equipment that is registered by CARB and meet CARB’s standards. CARB sets its standards to be in line with the goal of reducing energy demand by 25% in 2030 and
75% in 2045.

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70 Action Consistency
Transportation Electrification
Create a jurisdiction-specific ZEV ecosystem to support deployment of ZEVs statewide (such as permit
streamlining, infrastructure siting, consumer education, or preferential parking policies).

Consistent. The proposed Project would be designed and
constructed in accordance with Title 24 Part 6 and Part 11 requirements, which includes constructing homes to allow for electric vehicle charging. Therefore, the proposed Project would not interfere with the implementation of a ZEV
ecosystem within the City.

Local Action Policies - VMT Reduction
Adopt and implement Complete Streets policies and
investments, consistent with general plan circulation
element requirements.

Consistent. The Project proposes the replacement of the sidewalk along the Project frontage. The existing sidewalk condition would be improved and the Project would not
interfere with the implementation of Complete Streets in the City.

Increase public access to shared clean mobility options (such as planning for and investing in electric shuttles, bike share, car share, transit).

Consistent. The Project site is located in a developed urban area with sidewalks available along all nearby roadways.

The proposed on-site roadway system includes walkways
throughout the Project site that would connect to the off-site sidewalks. In addition, the proposed residential units would allow for charging of electric vehicles. The nearest bus stop from the existing Project driveway is the Lakeview-Yorba Linda stop, located approximately 0.7 miles west.

Amend zoning or development codes to enable mixeduse, walkable, and compact infill development (such as increasing allowable density of the neighborhood).

Consistent. While the Project does not require a zoning amendment, it would develop a high density residential
community. The Project proposes to allot 4 units, or 6
percent of the base density, for very-low-income
households.

Local Action Policies - Building Decarbonization
Adopt all-electric new construction reach codes. Consistent. The proposed Project would comply with Title 24 Parts 6 and 11, which includes electric heat pumps
installed during construction and electric hookups for all appliances.

Adopt policies and incentive programs to reduce
electrical loads from equipment plugged into outlets
(such as purchasing Energy Star equipment for
municipal buildings, occupancy sensors, smart power
strips, equipment controllers, etc.).

Consistent. The proposed Project would be constructed in accordance with Title 24 CALGreen requirements, which
includes installation of Energy Star equipment and
appliances in new buildings.

Facilitate deployment of renewable energy
production and distribution and energy storage.

Consistent. The proposed Project would be constructed in accordance with the California Energy Code (Title 24 Part 6) to meet all requirements related to solar energy
production and the CALGreen Building Energy Efficiency
Standards (Title 24 Part 11) to meet efficiency standards.

Source: Air Quality, Energy, and GHG Impact Analysis (Appendix F).

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71 a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

HEIP PEIR Mitigation Measures
MM 4.1-1 As listed previously in Section 5.1, Air Quality.

MM 4.1-2 As listed previously in Section 5.1, Air Quality.

Proposed Project Applicability: MM 4.1-2 has been partially satisfied by the Air Quality, Energy, and Greenhouse Gas Impact Analysis prepared for the proposed Project and included as Appendix F. This mitigation measure will be incorporated into the MMRP.

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72 5.5. LAND USE AND PLANNING
Would the project: Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Information
Identifying
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No New
Impact/
No
Impact
a) Physically divide an established community?
b) Cause a significant environmental impact due
to conflict with any land use plan, policy, or
regulation adopted for the purpose of avoiding
or mitigating an environmental effect?
Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to land use and planning under Section 4.5. The HEIP PEIR determined development under the HEIP would occur within existing urban areas and infill sites, and is not expected to divide an established community. Therefore, the implementation of the project is not anticipated to physically divide an established community and impacts would be less than significant.

The HEIP PEIR concluded that the project would not conflict with key relevant General Plan policies, YLMC requirements, or SCAG’s Connect SoCal. Therefore, the HEIP PEIR determined that impacts related to conflicts with any land use plan, policy, or regulation adopted for the purpose of avoiding or mitigating an environmental effect would be less than significant.

Impacts Associated with the Proposed Project
a) Physically divide an established community?
No New Impact.

The Project site is currently developed with an existing residential use and is surrounded by existing roadways and other existing residential and institutional uses. The proposed Project would be consistent with the land use and zoning designations for the site. In addition, the proposed Project does not involve development of roadways or other infrastructure that could divide a community. Access to the site would be provided by proposed driveways off Yorba Linda Boulevard. Therefore, implementation of the proposed Project would not physically divide an established community, and the proposed Project would result in no new impact related to dividing an established community. The Project would be consistent with the findings of the HEIP PEIR and no new or more severe impact would occur.

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City of Yorba Linda Environmental Consistency Analysis
73 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? No New Impact.

The HEIP PEIR includes an analysis of the HEIP’s consistency with the City of Yorba Linda General Plan and Zoning Code, and SCAG’s Connect SoCal. The proposed Project is consistent with the site’s General Plan land use designation of Residential High (R-H) and zoning designation of Residential Multiple-Family 20 (RM-20). As demonstrated throughout this document, the Project is consistent with the HEIP PEIR. Thus, consistent with the findings of the HEIP PEIR, the proposed Project would not conflict with any of the applicable General Plan goals and policies nor would it conflict with the Zoning Code. The Project would have a less than significant impact with respect to a conflict with the City of Yorba Linda General Plan and Zoning Code.

Similarly, the HEIP PEIR determined the project would not result in an inconsistency with the adopted Connect SoCal, which includes long-range regional transportation plans, regional transportation improvement programs, regional housing needs allocations, and other plans for the region. Connect SoCal policies focus largely on regional transportation and the efficiency of transportation, which are implemented by counties and cities within the SCAG region, as part of the overall planning and maintenance of the regional transportation system. However, these strategies are also intended to reduce GHG emissions from passenger vehicles. As an individual development, the policies are not directly applicable to the Project. However, consistent with the analysis presented in the HEIP PEIR, the proposed Project would not interfere with the implementation of these policies. Therefore, consistent with the HEIP PEIR, the proposed Project would not 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. Therefore, the Project would be consistent with the findings of the HEIP PEIR and no new or more severe impact would occur.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding land use and planning. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

HEIP PEIR Mitigation Measures
No mitigation measures related to land use and planning are included in the HEIP PEIR. Project impacts would be less than significant; therefore, no mitigation measures related to land use and planning are required.

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19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
74 5.6. NOISE
Would the project result in: Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Information
Identifying
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No
New
Impact/
No
Impact
a) Generation of a substantial temporary or
permanent increase in ambient noise levels in the
vicinity of the project in excess of standards
established in the local general plan or noise
ordinance, or applicable standards of other
agencies?
b) Generation of excessive groundborne
vibration or groundborne noise levels?
c) For a project located within the vicinity of a
private airstrip or 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 expose people residing or
working in the project area to excessive noise
levels?
Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to noise under Section 4.6. The HEIP PEIR determined future development would likely occur in close proximity to noise sensitive receptors and elevate the ambient noise environment. Therefore, construction noise impacts would be potentially significant. Future projects would be required to implement Mitigation Measures MM 4.6-1 through MM 4.6-3, which require construction contractors to implement noise best practices, and would contribute in minimizing construction-related noise.

However, due to the unknown number of construction activities that could occur at one time, proximity of construction activities to sensitive receptors, and other factors that cannot be quantified at this time, such as the longevity of activities, construction-related noise impacts may not be reduced to less than significant levels for some future development. Therefore, construction-related noise impacts would remain significant and unavoidable. The HEIP PEIR determined the project would not result in a significant impact from operational off-site traffic increases. However, future development could result in a significant impact from operation stationary source activities. Future projects would be required to adhere to Goal N-4 of the City of Yorba Linda General Plan Noise Element, requiring future projects to mitigate potential noise impacts.

Additionally, future projects would be required to comply with the exterior noise level limits outlined in the City of Yorba Linda Municipal Code Section 8.32.060. Further, implementation of Mitigation Measure MM

4.6-5, which requires future project applicants to prepare a noise study evaluating stationary noise impacts

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City of Yorba Linda Environmental Consistency Analysis
75 and identifying mitigation measures if necessary, would reduce potential project stationary source impacts would to a less than significant level.

The HEIP PEIR determined the project’s construction activities would potentially result in a perceptible groundborne vibration or noise. However, implementation of Mitigation Measure MM 4.6-4 which requires future project applicants to prepare a study to evaluate potential construction-related vibration impacts and provide measures to reduce vibration levels below thresholds, would reduce construction-related vibration impacts to acceptable levels and ensure that construction would not exceed the maximum acceptable continuous vibration threshold for fragile buildings of 0.10 PPV (in/sec). Therefore, construction vibration impacts would be reduced to less than significant. The project’s residential development is not anticipated to result in stationary vibration sources; therefore the project would not generate excessive groundborne vibration or groundborne noise levels during operation and impacts would be less than significant The HEIP PEIR determined the project site is not located within two miles of a public airport of within an airport land use plan. Therefore, the project would not be exposed to excessive noise levels from airport operations and impacts would be less than significant.

Impacts Associated with the Proposed Project
This section was prepared using the following report:
• 19081 Yorba Linda Boulevard Residential Project Noise and Vibration Impact Analysis. Prepared by EPD Solutions, Inc., August 2025. (Appendix H).

Existing Noise Levels
As detailed in the Noise and Vibration Impact Analysis (Appendix H), to identify the existing ambient noise level environment, four short-term noise level measurements were taken at locations near the Project site.

Figure 5-1 shows the location of each noise measurement. Table N-1 presents a summary of the measured hourly noise levels and calculated community noise equivalent level (CNEL) from the long-term noise level measurements. As shown in Table N-1, the average daily noise levels around the Project site range from

47.2 dBA to 69.9 dBA.

Table N-1: Ambient Noise Level Measurements
Location Description Leq
(dBA)
Lmax
(dBA)
Lmin
(dBA)
NM-1 In front of 19111 Yorba Linda Boulevard 69.1 84.1 46.3 NM-2 Southwest corner of 19045 Yorba Linda Boulevard 69.9 85.4 44.9 NM-3 Northeast of 19185 Palm Vista 50.1 67.2 36.0
NM-4 In front of 19020 Lynn Lane 47.2 66.1 37.3
Notes: dBA=A-weighted decibels; Leq=Equivalent Sound Level; Lmin=Minimum Sound Level; Lmax=Maximum Sound Level Source: Noise and Vibration Impact Analysis (Appendix H)

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77 Figure 5-1: Noise Measurement Locations

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19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
79 a) Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the project in excess of standards established in the local general plan or noise ordinance, or applicable standards of other agencies?
No New Impact.

Construction
Noise generated by construction equipment would include a combination of trucks, power tools, concrete mixers, and portable generators that when combined can reach high levels. Construction is expected to occur in the following stages: demolition, site preparation, grading, building construction, architectural coating, and paving. The Project construction noise would be temporary in nature as the operation of each piece of construction equipment would not be constant throughout the construction day, and equipment would be turned off when not in use. For the purposes of the Noise and Vibration Impact Analysis, the nearest noise sensitive receptor to Project construction is a single-family residence located adjacent to the south of the Project site, existing residential units approximately 15 feet north of the Project boundary, and Jessamyn West Park approximately 15 feet east of the Project boundary. These receptors represent the closest and therefore most highly exposed noise-sensitive uses in the Project vicinity.

Table N-2 shows the nearest noise sensitive uses to the Project site, their distance from the center of construction activities, as recommended by Federal Transit Administration (FTA) guidance, and composite noise levels expected during construction. As shown, it is expected that composite noise levels during construction at the nearest off-site residential use to the south could reach 86.5 dBA Leq during the demolition phase. However, as required by HEIP PEIR Mitigation Measure MM 4.6-1, all construction equipment used for the Project would be equipped with mufflers consistent with standard industry practices. Therefore, although the exact specifications of the mufflers are currently unknown, a conservative noise reduction of 9 dBA has been assumed to account for their use. In addition, existing walls located between the construction area and the sensitive receptors to the north, northeast, and south would provide further noise attenuation.

Therefore, an additional reduction of 5 dBA has been applied to the noise levels estimated for those respective receptors. Thus, with implementation of MM 4.6-1, the highest construction noise levels at the nearest sensitive uses surrounding the Project would be 72.5 dBA. Thus, construction noise would not exceed the 80 dBA construction noise level criteria for daytime construction noise level criteria as established by the FTA for residential land uses. Additionally, noise levels attenuate (decrease) with distance from the source due to geometric spreading and intervening structures. Therefore, if construction noise levels at the closest sensitive receptors would remain below applicable thresholds, noise levels at receptors located farther from the Project site would also be lower. Accordingly, sensitive uses located at greater distances from construction activities, including the North County Chabad Center to the west, would experience noise levels below those evaluated at the nearest receptors and well below applicable standards. This project-specific analysis concludes that the Project would not generate a substantial temporary increase in ambient noise levels in the vicinity of the project in excess of applicable standards. Therefore, impacts related to construction noise would be less than significant and no new or more severe impact would occur compared to the HEIP PEIR.

Table N-2: Potential Construction Noise Levels at Nearest Receptors Sensitive Receptors
Distance
Between
Geographic
Center of
Project Site
(feet)
Noise Level (dBA)1
Demolition Site
Preparation Grading Building Construction Paving Architectural Coating Residential to the
North 280 72.4 71.8 70.5 72.2 70.8 58.7

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19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
80 Sensitive Receptors
Distance
Between
Geographic
Center of
Project Site
(feet)
Noise Level (dBA)1
Demolition Site
Preparation Grading Building Construction Paving Architectural Coating Residential to the
Northeast 250 73.4 72.8 71.5 73.2 71.8 59.7
Residential to the
South 55 86.5 86.0 84.7 86.4 84.9 72.9
Institutional to the
West 200 75.3 74.7 73.4 72.2 73.7 61.6
Highest Noise Level 86.5 86.0 84.7 86.4 84.9 72.9
Highest Noise Level with Mitigation
Measures2 72.5 72.0 70.7 72.4 70.9 58.9
Threshold 80
Exceed the threshold? No No No No No No

1. The noise level is estimated based on the equipment list provided in Table 6-1 of Appendix H and distance to the sensitive receptors from the geographic center of the Project site.

2. As required by Yorba Linda Housing Element Implementation Program Mitigation Measure 4.6-1, all construction equipment used for the Project would be equipped with mufflers consistent with standard industry practices. Although the exact specifications of the mufflers are currently unknown, a conservative noise reduction of 9 dBA has been assumed to account for their use. In addition, existing walls located between the construction area and the sensitive receptors to the north, northeast, and south would provide further noise attenuation. Therefore, an additional reduction of 5 dBA has been applied to the noise levels estimated for those respective receptors.

Source: Noise and Vibration Impact Analysis (Appendix H) Additionally, YLMC Section 8.32.090 states that construction shall occur only between the hours of 7:00 a.m. to 8:00 p.m. on weekdays, including Saturdays, and is prohibited on Sundays and federal holidays (PPP N1). The Project would comply with the City’s construction hours regulations, which would be ensured through the City’s development permitting process.

Temporary Increases in Ambient Noise from Project Construction According to the California Department of Transportation (Caltrans) Traffic Noise Analysis Protocol (2020a), if construction generates a temporary noise level increase of 12 dBA Leq or more above the existing ambient noise level, a potentially significant impact would occur. To identify the temporary Project construction noise level contributions to the existing ambient noise environment, the Project construction noise levels were combined with the existing ambient noise level measurements listed in Table N-1. The difference between the combined Project-construction and ambient noise levels is used to describe the construction noise level contributions. As shown in Table N-3, the highest temporary construction ambient noise increase would be

11.2 dBA at the closest residence to the north, which is less than the temporary ambient noise increase threshold of 12 dBA. Thus, temporary construction noise level increases from Project construction would be less than significant.

Table N-3: Construction Noise Level Increases at Nearest Receptors Sensitive Receptors
Noise Level (dBA) Exceed the
Highest Noise Thresholds?
Level1
Ambient
Noise Level
Construction
Increase Threshold
Residential to the North 58.4 47.2 11.2
12 No
Residential to the Northeast 59.4 50.1 9.3 No

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19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
81 Residential to the South 72.5 69.1 3.4 No
Institutional to the West 66.3 69.9 NA No
1 The highest noise level to the sensitive receptors in Table 6-2 with the installation of the mufflers and existing walls.

Note: when the noise increase is negative, a “NA” would be applied in the table. “NA” means “Not Applicable”.

Source: Noise and Vibration Impact Analysis (Appendix H) Off-Site Construction Noise
During construction, short-term noise impacts could occur as a result of construction crew commutes and the transport of construction equipment and materials to the site. However, construction crew commutes and the transport of construction equipment and materials to the site would have a small effect on longer-term ambient noise levels when compared to the existing average daily traffic (ADT) volume on Yorba Linda Boulevard. According to the HEIP PEIR’s Traffic Impact Analysis (citation), the approximate average daily traffic (ADT) on Yorba Linda Boulevard between Palm Avenue and Ohio Street is 11,642 trips. According to the CalEEMod, which is used to predict the number of construction-related automotive trips, the maximum number of Project construction trips traveling to and from the Project site during a single construction phase would not be expected to exceed 210 daily trips in total. Therefore, the Project’s 210 construction trips would not result in a doubling of traffic on the local transportation network. Additionally, the Project’s 2019 construction trips would equate to a noise level increase of approximately 0.08 dBA, which would not be perceptible to the human ear in an outdoor environment. According to the Federal Interagency Committee on Noise (FICON) (1992), when the ambient noise level is larger than 65 dBA, an increase of 1.5 dB or more would be considered potentially significant. As shown in Table N-1, the ambient noise level along Yorba Linda Boulevard ranges from 69.1 dBA to 69.9 dBA. As such, the Project would not introduce more than a

1.5 dBA increase. Additionally, construction is temporary, and construction trips would cease upon completion of the Project. Furthermore, the Project would be required to comply with HEIP PEIR MM 4.6-3 to minimize the exposure of sensitive land uses to delivery truck noise. Overall, potential impacts related to construction traffic noise would be less than significant.

Operation
Long-term operational noise would be generated by the Project through mobile sources (automobiles traveling to and from the site) and stationary sources (HVAC noise, parking lot noise, and trash unloading).

Implementation of the Project has the potential to increase off-site traffic volumes on surrounding roadways.

Roadway segment noise levels for the “Existing” and “Existing with Project” scenarios were compared to evaluate Project-related operational noise impacts. As shown in Table N-4, noise level under the “Existing” scenario, noise levels at a distance of 100 feet from the roadway centerline would be 53.8 dBA. According to the Vehicle Miles Traveled (VMT) Screening Analysis prepared for the Project (Appendix I), the Project is expected to result in 418 ADT, thus the existing plus Project traffic on the segment of Yorba Linda Boulevard fronting the Project site would be 12,060 ADT. As shown in Table N-5, the existing plus Project traffic noise level would be 53.9 dBA. Thus, the overall noise increase on Yorba Linda Boulevard due to the Project traffic would be 0.1 dBA. As such, the increase would not exceed 1.5 dB threshold. Therefore, a less-than-significant impact would occur. This project-specific analysis concludes that the Project would not generate a substantial long-term increase in ambient noise levels in the vicinity of the project in excess of applicable standards.

Therefore, impacts related to operational noise would be less than significant and no new or more severe impact would occur compared to the HEIP PEIR.

Table N-4: Existing Traffic Noise Levels
Roadway Segment ADT1
dBA @ 100
feet from
Roadway
Centerline
Centerline
to 70 dBA
CNEL
(feet)
Centerline
to 65 dBA
CNEL
(feet)
Centerline
to 60 dBA
CNEL
(feet)

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19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
82 Yorba Linda Boulevard Between Palm Avenue
and Ohio Street 11,642 53.8 - - 83
Source: Noise and Vibration Impact Analysis (Appendix H) Table N-5: Existing Plus Project Traffic Noise Level
Roadway Segment ADT1
dBA @ 100
feet from
Roadway
Centerline
Centerline
to 70 dBA
CNEL
(feet)
Centerline
to 65 dBA
CNEL
(feet)
Centerline
to 60 dBA
CNEL
(feet)
Increase over
Existing
Scenario
(dBA)
Yorba Linda Boulevard Between
Palm Avenue and Ohio Street 12,060 53.9 - - 85 0.1
Source: Noise and Vibration Impact Analysis (Appendix H) Stationary Noise
During Project operation, adjacent off-site land uses would be potentially exposed to stationary-source noise levels from heating, ventilation, and air conditioning (HVAC) equipment. The Noise and Vibration Impact Analysis assumed all HVAC units would operate simultaneously for 585 minutes during daytime hours and 252 minutes during nighttime hours. Table N-6 shows the noise levels that nearby sensitive receptors would be exposed to as a result of Project HVAC units. As shown, the Project would generate operational noise levels of approximately 51.2 dBA during the daytime and 49.4 during the nighttime at the nearest sensitive receptors, which is below the City’s Municipal Code noise requirements of 55 dBA in the daytime and 50 dBA in the nighttime. Therefore, operational noise impacts would be less than significant.

Table N-6: Operational Exterior Noise Level at Nearest Receptors Sensitive Receptors Daytime (dBA) Nighttime (dBA)
Residential to the north 46.5 43.5
Residential uses to the northeast 48.6 46.7
Residential to the south 51.2 49.4
Institutional uses to the west 50.6 48.7
Maximum Noise Level 51.2 49.4
Exterior Thresholds 55 50
Exceed thresholds? No No
Source: Noise and Vibration Impact Analysis (Appendix H) Increases in Ambient Noise from Project Operation
To identify Project operational ambient noise level increases, the Project operational noise levels are combined with the existing ambient noise levels measurements. As shown in Table N-7, operation of the Project would generate daytime noise level increases ranging from 0.1 to 3.2 dBA Leq and nighttime noise level increases ranging from <0.01 to 2.2 dBA Leq at the closest receiver locations, which would not exceed the threshold of 5 dBA for ambient noise level less than 60 dBA and 1.5 dBA for ambient noise level over 60 dBA. Therefore, the incremental Project operational noise level increase is considered less than significant at all receiver locations. Therefore, no new or more severe impact would occur with Project operation.

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19081 Yorba Linda Boulevard Residential Project
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83 Table N-7: Operational Noise Level Increases at Nearby Receptors Sensitive
Receptors
HVAC and Truck
Noise Parking
Lot
Noise
Ambient
Noise
Level
Operational Noise
Level Overall Increase
Threshold Exceed
Daytime Threshold?
(dBA)
Nighttime
(dBA)
Daytime
(dBA)
Nighttime
(dBA)
Daytime
(dBA)
Nighttime
(dBA)
Residential
to the
north

46.5 43.5 41.1 47.2 50.4 49.4 3.2 2.2 5 No
Residential
uses to the
northeast

48.6 46.7 41.1 50.1 52.7 52.1 2.6 2.0 5 No
Residential
to the
south

51.2 49.4 41.1 69.1 69.2 69.2 0.1 0.1 1.5 No
Institutional
uses to the
west

50.6 48.7 41.1 69.9 70.0 69.9 0.1 <0.01 1.5 No
Source: Noise and Vibration Impact Analysis (Appendix H) b) Generation of excessive groundborne vibration or groundborne noise levels? No New Impact.

Construction
Construction activity can cause varying degrees of ground vibration, depending on the equipment and methods used, the distance to receptors, and soil type. Construction vibrations are intermittent, localized intrusions. The use of heavy construction equipment, particularly large bulldozers, and large loaded trucks hauling materials to or from the site generate construction-period vibration impacts. Table N-8, presents typical vibration levels associated with construction equipment.

Table N-8: Construction Vibration Reference Levels
Equipment Reference Vibration Level at 25 Feet (PPV [inches/second]) Small Bulldozer 0.003
Loaded Trucks 0.076
Large Bulldozer 0.089
Source: Noise and Vibration Impact Analysis (Appendix H) The Noise and Vibration Impact Analysis (Appendix H) uses vibration standards from Caltrans (2020) to analyze vibration impacts to existing structures near the Project. The analysis assesses the potential for building damages using vibration levels in PPV (peak particle velocity) (in/sec). Caltrans indicates that for older residential buildings, the construction vibration damage criterion is 0.3 in/sec in PPV. The nearest sensitive receptor to the south is located as close 15 feet from the Project site’s boundaries. As shown in Table N-9, vibration levels during construction would range from 0.006 PPV (in/sec) to 0.191 PPV (in/sec), which would not exceed the vibration threshold of 0.3 PPV (in/sec) for older residential structures. Vibration levels at all other buildings located further from the Project site would be lower.

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84 Table N-9: Potential Construction Vibration Impact at Nearest Receptors Sensitive Receptors
Distance Between
Construction Vibration to
the Nearest Structures (feet)
Vibration Level in PPV (inch/sec)
Small Bulldozer Loaded Trucks Large Bulldozer
Residential to the North 35 0.002 0.046 0.054
Residential to the Northeast 70 0.001 0.016 0.019
Residential to the South 15 0.006 0.164 0.191
Institutional to the West 55 0.001 0.023 0.027
Highest Vibration Level 0.006 0.164 0.191
Thresholds 0.3
Exceed the threshold? No No No
Source: Noise and Vibration Impact Analysis (Appendix H) As such, construction related vibration would remain below thresholds and impacts would be less than significant. Additionally, as described above, the Project would adhere to the construction hours permitted by YLMC Section 8.32.090, which states that construction shall occur only between the hours of 7:00 a.m. to 8:00 p.m. on weekdays, including Saturdays, and is prohibited on Sundays and federal holidays (PPP N-1).

Thus, construction related vibration would not occur during sensitive evening hours. Overall, the Project would result in a less-than-significant impact related to construction vibration. This project-specific analysis concludes that the Project would not generate excessive groundborne vibration or groundborne noise levels. Therefore, impacts related to construction vibration would be less than significant and no new or more severe impact would occur compared to the HEIP PEIR.

Operation
Once operational, the Project would not be a significant source of ground-borne vibration. Ground-borne vibration surrounding the Project currently results from traffic on Yorba Linda Boulevard. Operations of the Project would include passenger cars traveling to and from the residences. Vibration levels generated from Project-related traffic on the adjacent roadways are unusual for on-road vehicles because the rubber tires and suspension systems of on-road vehicles provide vibration isolation. Based on a reference vibration level of 0.076 in/sec PPV, structures greater than 20 feet from the roadways that contain Project trips would experience vibration levels below the standard of 0.2 PPV in/sec (Appendix H). Therefore, vibration levels generated from Project-related traffic on the adjacent roadways would be less than significant. This projectspecific analysis concludes that the Project would not generate excessive groundborne vibration or groundborne noise levels. Therefore, impacts related to operational vibration would be less than significant and no new or more severe impact would occur compared to the HEIP PEIR. c) For a project located within the vicinity of a private airstrip or 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 expose people residing or working in the project area to excessive noise levels? No New Impact.

As described in the HEIP PEIR, there are no airports within two miles of the housing opportunity sites. The nearest airport to the Project site is Fullerton Municipal Airport, approximately 10.5 miles to the west of the Project site. The Project site is not located within the area designated under the Airport Environs Land Use Plan for Fullerton Municipal Airport (Airport Land Use Commission, 2019). Therefore, the proposed Project

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85 would not expose people residing or working in the Project area to excessive noise levels from airports.

Impacts would be less than significant. No new impact or more severe impact would occur.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding noise. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

Plans, Programs, or Policies (PPP)
PPP N-1: Construction Noise. The Project would be required to adhere to the construction noise hours provided in Yorba Linda Municipal Code (YLMC) Section 8.32.090 (Noise Control – Exemptions) which limits noise sources associated with construction, repair, remodeling, or grading of any real property to the hours of 7:00 a.m. and 8:00 p.m. on weekdays, including Saturday, and prohibits constriction at any time on Sunday or a Federal holiday.

HEIP PEIR Mitigation Measures
MM 4.6-1 Construction contractors shall equip all construction equipment, fixed or mobile, with properly operating and maintained mufflers, consistent with manufacturers’ standards, and all stationary construction equipment shall be placed so that emitted noise is directed away from the noisesensitive use nearest the construction activity.

Proposed Project Applicability: MM 4.6-1 is applicable to the Project and will be incorporated into the MMRP.

MM 4.6-2 The construction contractor shall locate equipment staging in areas that will create the greatest distance between construction-related noise sources and noise-sensitive receiver nearest to the construction activity.

Proposed Project Applicability: MM 4.6-2 is applicable to the Project and will be incorporated into the MMRP.

MM 4.6-3 The construction contractor shall limit haul truck deliveries to the same hours specified for construction equipment Section 8.32.090[D] of the City of Yorba Linda Municipal Code. The contractor shall design delivery routes to minimize the exposure of sensitive land uses to delivery truck noise.

Proposed Project Applicability: MM 4.6-3 is applicable to the Project and will be incorporated into the MMRP.

MM 4.6-4 Prior to issuance of any construction permits, applicants for individual projects that involve vibration-intensive construction activities, such as pile drivers, jack hammers, and vibratory rollers, within 25 feet of sensitive receptors (e.g., residences and fragile structures), shall prepare and submit to the City of Yorba Linda Planning Department a study to evaluate potential

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86 construction-related vibration impacts. The vibration assessment shall be prepared by an acoustical engineer and be based on recognized vibration-induced architectural damage criterion. If the study determines a potential exceedance of the thresholds, measures shall be identified that ensure vibration levels are reduced to below the thresholds. Identified measures shall be included on all construction and building documents and submitted for verification to the City of Yorba Linda Planning Department.

Proposed Project Applicability: MM 4.6-4 has been satisfied through the preparation of the Project-specific Noise and Vibration Impact Analysis (Appendix H) which determined vibration impacts related to Project construction and operation would be less than significant.

MM 4.6-5 Prior to issuance of any construction permits, applicants for individual projects that are within 50 feet of a sensitive receptor, shall prepare and submit to the City of Yorba Linda Planning Department a study to evaluate potential operational-related stationary source noise impacts.

The noise report shall be prepared by an acoustical engineer using the ISO 9613-2 protocol in the CadnaA (Computer Aided Noise Abatement) computer program. If the study determines a potential exceedance of the City’s thresholds (55 dBA Leq daytime, or 50 dBA Leq nighttime), measures shall be identified that ensure noise levels are reduced to below the thresholds.

Identified measures shall be included on all construction and building documents and submitted for verification to the City of Yorba Linda Planning Department.

Proposed Project Applicability: MM 4.6-4 has been satisfied through the preparation of the Project-specific Noise and Vibration Impact Analysis (Appendix H) which determined operational-related stationary source noise impacts related would be less than significant.

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19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
87 5.7. PUBLIC SERVICES
a) Would the project result in substantial
adverse physical impacts associated with the
provision of new or physically altered
governmental facilities, need for new or
physically altered governmental facilities, the
construction of which could cause significant
environmental impacts, in order to maintain
acceptable service ratios, response times or
other performance objectives for any of the
public services:

Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No New
Impact/
No
Impact
Fire protection?
Police protection?
Schools?
Parks?
Other Public Facilities?
Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to public services under Section 4.7. The HEIP PEIR determined implementation of the Project would result in an increased requirement for public services. However, considering the existing resources available, the project is not expected to result in the need for new or physically altered governmental facilities, the construction of which could cause significant environmental impact.

Impacts Associated with the Proposed Project
a) Result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptable service ratios, response times or other performance objectives for:
i. Fire Protection and Emergency Services
No New Impact.

Fire protection services for the City of Yorba Linda is currently provided by the Orange County Fire Authority (OCFA). Table PS-1 lists the three OCFA stations that serve the City. The nearest fire station to the Project site is OCFA Station 10, located at 18422 Lemon Drive, approximately 0.9 miles west of the Project site.

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City of Yorba Linda Environmental Consistency Analysis
88 Table PS-1: OCFA Station Locations
Location Apparatus Daily Staffing Distance to Project Site Station 10
18422 Lemon Drive
Yorba Linda, CA 92886
Battalion 2, Medic Engine
10, Patrol
101, Water Tender 10
1 Battalion Chief, 1 Fire
Captain, 1 Fire
Apparatus Engineer, 2
Firefighters

0.9 roadway miles
Total Station Staffing: 15
Firefighters
Station 32
20990 Yorba Linda
Boulevard
Yorba Linda, CA 92886
Medic Engine 32, Truck
32, Engine
132, Swift Water 32
2 Fire Captains, 2 Fire
Apparatus Engineers, 4
Firefighters

2.2 roadway miles
Total Station Staffing: 24
Firefighters
Station 53
25415 La Palma Avenue
Yorba Linda, CA 92887
Medic Engine 53, Engine
3531
1 Fire Captain, 1 Fire
Apparatus Engineer, 2
Firefighter
6 roadway miles
Total Station Staffing: 12
Firefighters
1 Cross staffed by on duty personnel
Source: City of Yorba Linda, 2022; Google Maps, 2025
Implementation of the Project would be required to adhere to the California Fire Code, as included in the YLMC Chapter 15.08. Compliance with these requirements would be verified by the OCFA as part of the City’s permitting process to ensure that the Project plans meet the fire protection requirements.

The proposed Project includes the development of 62 residential units, which would result in an increase in demand for fire protection and emergency medical services. As described in previously, the Project is anticipated to result in up to 182 new residents, which is within the population increase identified by the HEIP PEIR. Due to the increase in residents that would occur from implementation of the Project, an incremental increase in demand for fire protection and emergency medical services would occur.

However, consistent with the findings of the HEIP PEIR, because the Project site is located within two miles of two existing fire stations and is within a residential area that is already served by the OCFA, the Project would not require expansion of the existing fire station or construction of a new fire station.

Therefore, impacts related to fire protection services from the proposed Project would be less than significant. Therefore, no new impact related to fire protection services would occur. ii. Police Protection
No New Impact.

The City of Yorba Linda currently contracts with the Orange County Sheriff’s Department (OCSD) for police protection services. The HEIP PEIR describes daily staffing at the Yorba Linda Police Services is 25 officers with a total staffing of 41 officers, which includes two patrol shifts, and administrative and investigative staff (City of Yorba Linda, 2022). OCSD has a response time goal of 5 minutes or less for Priority 1 calls (emergency calls) and 12 minutes or less for Priority 2 calls (non-emergency calls) (City of Yorba Linda, 2022).

The proposed Project includes the development of 62 residential units, which would result in an increase in demand for police protection services. However, the increase would not be significant when compared to the current demand levels. The HEIP PEIR describes that increase in demands on existing police services from implementation of the HEIP would not adversely impact OCSD’s existing resources as there are no

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City of Yorba Linda Environmental Consistency Analysis
89 current staffing or equipment deficiencies in the service area. Therefore, impacts related to police protection services from the proposed Project would be less than significant. Therefore, no new impact related to police protection services would occur.
iii. School Services
No New Impact.

The Project site is located within the Placentia-Yorba Linda Unified School District (PYLUSD). PYLUSD operates a District Education Center, Education Service Center, 1 Adult Transition Program, 1 TK-12 online school, and 32 school sites including 20 elementary schools, 5 middle schools, 1 TK-8 school, 5 comprehensive high schools, 1 special education school, and 1 TK-12 home school (City of Yorba Linda, 2022). The HEIP PEIR describes that there is adequate capacity at all school levels within PYLUSD, including a remaining capacity of 3,753 elementary students, 906 middle school students, and 406 high school students (City of Yorba Linda, 2022).

The proposed Project includes the development of 62 residential units. Table PS-1 shows the estimated students that would be generated from the Project using the student generation rates for the PYLUSD listed in the HEIP PEIR.

Table PS-2: Estimated Number of Students Generated by the Project School Level Multi-Family Rate1 Number of Proposed
Units
Students Potentially
Generated by Project
Elementary School (K-5) 0.2216
62 14
Intermediate School (6-8) 0.1023 6
High School (9-12) 0.1384 9
Total 29
1 Source: City of Yorba Linda, 2022 (Table 4.7-4)
As shown in Table PS-1, the proposed 62 units could result in approximately 29 new students that would range in age from elementary through high school. Pursuant to Government Code Section 65995 et seq., the need for additional school facilities is addressed through compliance with school impact fee assessment. SB 50 (Chapter 407 of Statutes of 1998) sets forth a State school facilities construction program that includes restrictions on a local jurisdiction’s ability to condition a project on mitigation of a project’s impacts on school facilities in excess of fees set forth in the Government Code. These fees are collected by school districts at the time of issuance of building permits for development projects. Pursuant to Government Code Section 65995, applicants shall pay developer fees to the appropriate school districts at the time building permits are issued; and payment of the adopted fees provides full and complete mitigation of school impacts. Therefore, impacts related to school facilities would be less than significant with the Government Code required fee payments. Therefore, no new impact related to school services would occur.
iv. Parks
No New Impact.

The Project would develop 62 new residential units and 9,900 SF of common open space recreation area on the site for use by residents. The City has adopted a standard of 3 acres of parkland per 1,000 residents (not including joint-use or regional parks). As described in the HEIP PEIR, the City is currently in a deficit of approximately 32.2 acres of parkland. However, all residential developments within the City would be required to pay impact fees to offset the cost to expand or construct new park and recreational space and facilities to adequately serve the City’s growing population, pursuant to YLMC

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90 Section 15.56. Therefore, impacts related to the need to provide new or altered park and recreation facilities in order to maintain acceptable service ratios would be less than significant with the payment of parkland fees. Therefore, the Project would result in no new or increased impacts related to parks. v. Other Public Facilities
No New Impact.

The Yorba Linda Public Library (YLPL) is located at 4852 Lakeview Drive, approximately 0.6 miles west of the Project site. The proposed Project includes the development of 62 residential units, which would result in an increase in demand for library services. As described previously, the Project is anticipated to result in up to 181 new residents. Due to the increase in residents on-site, the Project could incrementally increase the demand for library services at the YLPL. However, as identified in the HEIP PEIR, demand on library services as a result of HEIP buildout would be incremental and would not require the need for new or expanded physical library facilities. Therefore, impacts related to libraries from the proposed Project would be less than significant. Therefore, no new or more severe impact related to libraries would occur.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding public services. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

HEIP PEIR Mitigation Measures
No mitigation measures related to public services are included in the HEIP PEIR. Project impacts would be less than significant; therefore, no mitigation measures related to public services are required.

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91 5.8. RECREATION
Would the project: Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Information
Identifying
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No New
Impact/
No
Impact
a) Would the project increase the use of
existing neighborhood and regional parks or
other recreational facilities such that substantial
physical deterioration of the facility would
occur or be accelerated?
b) Does the project include recreational
facilities or require the construction or
expansion of recreational facilities which might
have an adverse physical effect on the
environment?
Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to recreation under Section 4.8. The City currently has 27 developed and planned local public parks, totaling 186.08 acres. Additionally, there are three regional parks within the City and one regional park (Chino Hills State Park), which is accessible from the City. In total, these four regional parks consist of approximately 14,770 acres. The City also currently has joint-use agreements within 9 schools within PYLUSD for a total of 61.6 acres of joint-use park and recreation facilities. The City has an established park ratio requirement of 3 acres of local city parkland (not including joint-use or regional parks) per 1,000 residents. Based on the total acres of all parks and facilities within the City limits, a total of 171.08 acres of parkland (excluding joint-use facilities and regional parks) is being provided for a current park ratio of 2.52 acres of parkland per 1,000 residents. Therefore, the City has a current deficit of approximately 32.2 acres of parkland.

Using the City’s goal of 3 acres of local city parkland per 1,000 residents, the net increase in demand for parkland due to the buildout of the Project (7,085 new residents) would be approximately 21.26 acres.

Although the City does not meet its current park ratio requirement, there are approximately 14,770 acres of regional parks and 61.6 acres of joint-use parks that would serve future project residents Impacts Associated with the Proposed Project. Additionally, all future residential development would be required to provide adequate parkland or pay in-lieu fees pursuant to YLMC Section 15.56. Therefore, the HEIP PEIR determined impacts to parks and recreational facilities would be less than significant.

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City of Yorba Linda Environmental Consistency Analysis
92 a) Increase the use of existing neighborhood and regional parks or other recreational facilities such that physical deterioration of the facility would be accelerated? No New Impact.

As described previously, it is estimated that the Project would result in the addition of 182 residents. Based on the City’s park dedication requirement of 3 acres per 1,000 persons, the Project would be required to provide 0.5 acres of parkland (approximately 21,780 SF). The Project proposed 9,900 SF of common open space including an open lawn with a shade structure, BBQ, and tables for resident use. Thus, the Project’s proposed on-site amenities would in part satisfy the City’s parkland requirement. The Project Applicant would also be subject to the payment of Parkland Dedication Fees per YLMC Section 15.56.

According to the HEIP PEIR, the City has approximately 186.08 acres of developed and planned parks and approximately 14,770 acres of regional parkland available for use by residents. Therefore, there are many recreational facilities in the area that can be used by the residents of the Project. Consistent with the findings of the HEIP PEIR, while the Project would increase the number of residents in the area, thereby increasing the need for and use of recreational facilities, the residents resulting from the Project would not increase the use of existing parks and recreational facilities such that physical deterioration of the facility would be accelerated. Through Project adherence to YLMC requirements and payment of Park Development Fees, the Project would not increase the use of existing neighborhood and regional parks or other recreational facilities such that substantial physical deterioration of the facility would occur or be accelerated. Therefore, impacts would be less than significant and no new or more severe impact would occur. b) Require the construction or expansion of recreational facilities which might have an adverse physical effect on the environment?
No New Impact.

The Project Applicant would be required to provide adequate parkland equal to 3 acres per 1,000 residents (0.5 acres) or pay an in-lieu fee prior per the City’s Park Dedications Fees Ordinance. As described above, the Project includes 9,900 SF of common open space. The impacts related to development of the open space recreation area are considered part of the impacts of the proposed Project as a whole and are analyzed throughout the various sections of this document. For example, activities such as excavation, grading, and construction as required for the recreation area are analyzed in the Air Quality (Section 5.1), Greenhouse Gas Emissions (Section 5.4), Noise (Section 5.6), and Transportation (Section 5.9) sections. The Project would also contribute park development fees pursuant to YLMC Section 15.56, to be used towards the future expansion or maintenance parks and recreational facilities, these fees are standard with every residential development, and the proposed Project would not require the construction or expansion of other recreational facilities that might have an adverse physical effect on the environment. As a result, impacts would be less than significant. Therefore, the Project would have no new or increased impacts related to expansion of recreational facilities.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding recreation. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial

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City of Yorba Linda Environmental Consistency Analysis
93 importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

HEIP PEIR Mitigation Measures
No mitigation measures related to recreation are included in the HEIP PEIR. Project impacts would be less than significant; therefore, no mitigation measures related to recreation are required.

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City of Yorba Linda Environmental Consistency Analysis
94 5.9. TRANSPORTATION
Would the project: Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Information
Identifying
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No New
Impact/
No
Impact
a) Conflict with a program, plan, ordinance or
policy addressing the circulation system,
including transit, roadway, bicycle and
pedestrian facilities?
b) Would the project conflict or be inconsistent
with CEQA Guidelines section 15064.3,
subdivision (b)?
c) Substantially increase hazards due to a design
feature (e.g., sharp curves or dangerous
intersections) or incompatible uses (e.g., farm
equipment)?
d) Result in inadequate emergency access?
Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to transportation under Section 4.9. The HEIP PEIR describes that the project would not conflict with applicable General Plan goals and policies or with SCAG’s Connect SoCal.

Thus, the project would not conflict with a program, plan, ordinance or policy addressing the circulation system, including transit, roadway, bicycle and pedestrian facilities, and impacts would be less than significant.

The City of Yorba Linda has identified a vehicle miles traveled (VMT) per service population (SP) significance threshold of 35.1. The HEIP PEIR’s VMT analysis determined base year (2016) VMT per SP would be 33.29 while the cumulative year (2045) VMT per SP would be 33.74. Thus, the project would not exceed the City’s VMT impact threshold for baseline and cumulative conditions by 5.16 percent and 3.87 percent, respectively.

Therefore, the project would not conflict or be inconsistent with CEQA Guidelines section 15064.3, subdivision (b), and impacts would be less than significant.

All future roadway system improvements associated with development and redevelopment activities under the project would be designed in accordance with the City’s roadway design standards and improvements would be subject to review by the City of Yorba Linda, Public Works Department of. Therefore, the HEIP PEIR determined implementation of the project would not result in hazardous conditions, create conflicting uses, or cause a detriment to emergency vehicles access. Impacts would be less than significant.

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95 Impacts Associated with the Proposed Project
The following report was used to prepare this section:
• Vehicle Miles Traveled (VMT) Screening Analysis. Prepared by EPD Solutions, Inc, on May 28, 2025. (Appendix I).
a) Conflict with a program, plan, ordinance, or policy addressing the circulation system, including transit, roadway, bicycle, and pedestrian facilities?
No New Impact.

The proposed Project involves the development of 62 residential units. Construction and operation of the Project would introduce new vehicular traffic from workers and proposed operations. Vehicular access to the proposed Project would be provided via one driveway on Yorba Linda Boulevard. Vehicular traffic to and from the Project site would utilize the existing network of regional and local roadways that currently serve the Project area. The Project would construct internal roadways that would provide connection to and from proposed residences to adjacent residential areas. However, final design plans would be subject to review and approval by the City prior to the issuance of building permits. Additionally, as presented in Section 5.5, Land Use and Planning, implementation of the Project would not result in an inconsistency with the adopted Connect SoCal. Overall, because the Project is within the total unit count of the HEIP PEIR, the traffic that would be generated from operation of the Project is within the assumptions of the HEIP PEIR. As such, consistent with the findings of the HEIP PEIR, the Project would not interfere with adopted plans, programs, ordinances, or policies regarding roadway facilities; therefore, impacts would be less than significant.

Alternative Transportation
Sidewalks currently exist along Project frontage on Yorba Linda Boulevard. The existing sidewalk fronting the Project site would be removed and replace as part of Project construction. However, once Project construction is complete, the sidewalk would be available to the public for regular use. Additionally, according to Figure CR-4 of the City's General Plan Circulation Element, there are no existing or planned bicycle lanes along Project frontage on Yorba Linda Boulevard (City of Yorba Linda, 2016c). Thus, the proposed Project would not conflict with sidewalks or bike lanes along Yorba Linda Boulevard.

The closest bus route to the site is Orange County Transportation Authority (OCTA) Route 26 which serves Fullerton to Yorba Linda via Commonwealth Avenue and Yorba Linda Avenue. The closest bus stop along Route 26 is located 0.7 miles to the west of the Project site on Yorba Linda Boulevard. Buildout of the Project site would not disrupt the existing bus route. Therefore, the Project would not conflict with alternative transportation and Project impacts to transit, bicycle, and pedestrian facilities would be less than significant.

As such, there would be no new or increased impacts.
b) Conflict or be inconsistent with CEQA Guidelines § 15064.3, subdivision (b)? No New Impact.

Senate Bill (SB) 743 was signed by Governor Brown in 2013 and required the Governor’s Office of Planning and Research (OPR) to amend the State CEQA Guidelines to provide an alternative to LOS for evaluating transportation impacts. SB743 specified that the new criteria should promote the reduction of GHGs, the development of multimodal transportation networks and a diversity of land uses. In response, Section 15064.3 was added to the CEQA Guidelines beginning January 1, 2019, with the provisions of the section applying statewide beginning on July 1, 2020. State CEQA Guidelines Section 15064.3, Determining the Significance of Transportation Impacts, states that VMT is the most appropriate measure of transportation impacts and provides lead agencies with the discretion to choose the most appropriate methodology and thresholds for evaluating VMT.

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19081 Yorba Linda Boulevard Residential Project
City of Yorba Linda Environmental Consistency Analysis
96 The City’s Traffic Impact Analysis Guidelines (2020) provides VMT screening thresholds to identify projects that would be considered to have a less-than significant impact on VMT and therefore could be screened from further analysis. According to the City’s Guidelines, residential and office projects located within a low VMT-generating area may be presumed to have a less than significant impact. The VMT Screening Analysis prepared for the proposed Project (Appendix I) used the NOCC+ (North Orange County Collaborative) VMT Traffic Study Screening Tool which determined that the Project site is located within TAZ 175 which is considered a Low-VMT area. Additionally, the Project is consistent with the site’s underlying land use and zoning designations. Therefore, the Project meets the Low VMT Area Screening Criteria and can be presumed to have a less than significant impact related to VMT. This is consistent with the findings of the HEIP PEIR which determined VMT impacts from HEIP buildout would be less than significant. Therefore, no new or more severe impact would occur from implementation of the Project.
c) Substantially increase hazards due to a geometric design feature (e.g., sharp curves or dangerous intersections) or incompatible uses (e.g., farm equipment)? No New Impact.

Vehicular access to the Project site would be provided via one driveway on Yorba Linda Boulevard. Vehicular traffic to and from the Project site would utilize the existing network of regional and local roadways that currently serve the Project area. The Project would not introduce any new roadways or introduce a land use that would conflict with existing urban land uses in the surrounding area. Internal circulation would be provided via 24-foot-wide drive-aisles that double as a fire access lanes. Design of the proposed Project, including the internal private roadway, ingress, egress, and other streetscape changes are subject to the City’s development standards. For example, the design of the Project streets would be reviewed to ensure fire engine accessibility and turn around area is provided to the fire code standards. As a result, impacts related to vehicular circulation design features would be less than significant, and no new or increased impacts would occur.
d) Result in inadequate emergency access?
No New Impact.

The proposed construction activities, including equipment and supply staging and storage, would occur within the Project site, and would not restrict access of emergency vehicles to the Project site or adjacent areas. The installation of Project driveways, connections to existing infrastructure systems, and construction of new infrastructure that would be implemented during construction of the proposed Project could require the temporary closure of one side or portions of Yorba Linda Boulevard for a short period of time (e.g., hours or a few days). However, the construction activities would be required to ensure emergency access in accordance with Section 503 of the CFC (Title 24, California Code of Regulations, Part 9), which would be ensured through the City’s permitting process. Thus, implementation of the Project through the City’s permitting process would ensure existing regulations are adhered to and would reduce potential construction related emergency access impacts to a less-than-significant level. No new impact would occur.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding transportation. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial

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City of Yorba Linda Environmental Consistency Analysis
97 importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

HEIP PEIR Mitigation Measures
No mitigation measures related to transportation are included in the HEIP PEIR. Project impacts would be less than significant; therefore, no mitigation measures related to recreation are required.

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98 5.10. TRIBAL CULTURAL RESOURCES
a) Would the project cause a substantial
adverse change in the significance of a
tribal cultural resource, defined in Public
Resources Code section 21074 as either a
site, feature, place, cultural landscape that
is geographically defined in terms of the
size and scope of the landscape, sacred
place, or object with cultural value to a
California Native American tribe, and that
is:

Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to tribal cultural resources under Section 4.10. The HEIP PEIR determined implementation of the project has the potential cause a substantial adverse change in the significance of tribal cultural resources that may be buried beneath the housing opportunity sites’ surface or in on-site vegetation. However, implementation of MM 4.10-1 would ensure that grading and other grounddisturbing activities during construction are monitored by a qualified archaeologist as well as tribal monitors.

The mitigation measure further requires the proper treatment of any resources that may be uncovered, and the avoidance of disturbance in areas where potential resources are uncovered. With implementation of the required mitigation measure, the project would not cause a substantial adverse change in the significance of a tribal cultural resource and potential impacts would be reduced to less than significant levels.

Impacts Associated with the Proposed Project
a) Would the project cause a substantial adverse change in the significance of a tribal cultural resource, defined in Public Resources Code Section 21074 as either a site, feature, place, cultural landscape that is geographically defined in terms of the size and scope of the landscape, sacred place, or object with cultural value to a California Native American tribe, and that is:

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City of Yorba Linda Environmental Consistency Analysis
99 i. Listed or eligible for listing in the California Register of Historical Resources, or in a local register of historical resources as defined in Public Resources Code section 5020.1(k)? ii. A resource determined by the lead agency, in its discretion and supported by substantial evidence, to be significant pursuant to criteria set forth in subdivision (c) of Public Resources Code Section 5024.1. In applying the criteria set forth in subdivision (c) of Public Resource Code Section 5024.1, the lead agency shall consider the significance of the resource to a California Native American tribe?
No New Impact.

The Project site is completely disturbed and developed with a single-family residences consisting of three buildings, various ancillary structures such as garages, storage sheds and share structures, as well as a small orchard with additional ornamental landscaping including trees and shrubs. Due to the disturbed nature of the site, it is unlikely that implementation of the proposed Project would impact tribal cultural resources.

However, if previously undocumented tribal cultural resources are identified during ground disturbing activities, a qualified monitor shall be contacted to assess the nature and significance of the find and divert earthmoving activities, if necessary, in accordance with MM 4.10-1. Compliance with MM 4.10-1 would reduce potential impacts related to tribal cultural resources to a less-than-significant level. Therefore, the proposed Project would be consistent with the analysis in the HEIP PEIR and no new impact would occur.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding tribal cultural resources. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

HEIP PEIR Mitigation Measures
MM 4.10-1 Prior to the commencement of any ground disturbing activity at the Project sites, the Project Applicant shall retain a Native American Monitor approved by the NAHC. A copy of the executed contract shall be submitted to the City of Yorba Linda Planning Department prior to the issuance of any permit necessary to commence a grounddisturbing activity. The Tribal monitor will only be present on-site during the construction phases that involve grounddisturbing activities into areas of undisturbed soils. The Tribal Monitor will complete daily monitoring logs that will provide descriptions of the day’s activities, including construction activities, locations, soil, and any cultural materials identified. The on-site monitoring shall end when all grounddisturbing activities on the Project Site are completed, or when the Tribal Representatives and Tribal Monitor have indicated that all upcoming grounddisturbing activities at the Project Site have little to no potential for impacting Tribal Cultural Resources.

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100
Upon discovery of any Tribal Cultural Resources, construction activities shall cease in the immediate vicinity of the find (not less than the surrounding 50 feet) until the find can be assessed. All Tribal Cultural Resources unearthed by Project activities shall be evaluated by the qualified archaeologist and Tribal monitor approved by the Consulting Tribe. If the resources are Native American in origin, the Consulting Tribe will retain it/them in the form and/or manner the Tribe deems appropriate, for educational, cultural and/or historic purposes. Work may continue on other parts of the Project site while evaluation and, if necessary, mitigation takes place (CEQA Guidelines Section 15064.5[f]). If a non-Native American resource is determined by the qualified archaeologist to constitute a “historical resource” or “unique archaeological resource,” time allotment and funding sufficient to allow for implementation of avoidance measures, or appropriate mitigation, must be available.

The treatment plan established for the resources shall be in accordance with CEQA Guidelines Section 15064.5(f) for historical resources and PRC Sections 21083.2(b) for unique archaeological resources.

Proposed Project Applicability: MM 4.10-1 is applicable to the proposed Project and will be incorporated into the MMRP.

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5.11.WILDFIRE
If located in or near State Responsibility Areas
or lands classified as very high fire hazard
severity zones, would the project:

Substantial
Change in
Project or
Circumstances
Resulting in
New
Significant
Effects
New
Information
Showing
Greater
Significant
Effects than
Previous EIR
New
Information
Identifying
New
Mitigation
or
Alternative
to Reduce
Significant
Effect is
Declined
Minor
Technical
Changes
or
Additions
No New
Impact/
No
Impact
a) Substantially impair an adopted emergency
response plan or emergency evacuation plan?
b) Due to slope, prevailing winds, and other
factors, exacerbate wildfire risks, and thereby
expose project occupants to, pollution
concentrations from a wildfire or the uncontrolled
spread of a wildfire?
c) Require the installation or maintenance of
associated infrastructure (such as roads, fuel
breaks, emergency water sources, power lines,
or other utilities) that may exacerbate fire risk or
that may result in temporary or ongoing impacts
to the environment?
d) Expose people or structures to significant risks,
including downslope or downstream flooding or
landslides, as a result of runoff, post-fire slope
instability, or drainage changes?
Summary of Impacts Identified in the HEIP PEIR
The HEIP PEIR discussed impacts related to wildfire under Section 4.11. The HEIP PEIR notes that the City has an adopted Emergency Operation Plan (EOP) that establishes emergency organization, assigns tasks, specifies policies and general procedures, and provides for coordination of planning efforts of the various emergency staff and service elements. An increase in dwelling units under the HEIP could lead to changes in mobility patterns which could potentially impair implementation of or physically interfere with the City of Yorba Linda or Orange County’s emergency response or evacuation plans. However, future projects would be required to implement MM 4.11-1, which would ensure the proper evaluation of emergency evacuation during wildfires. With implementation of the required mitigation and General Plan goals and policies, the project’s potential impacts to an adopted emergency response or emergency evacuation route would be reduced to less than significant.

Future development located within a Very High FHSZ would add people and structures that could be at risk from a wildfire, resulting in potentially significant impacts. However, implementation of MM 4.11-2 would ensure the project’s potential impacts to wildland fire hazards be mitigate through the installation of fire

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systems, fire-resistant landscaping and appropriate defensible space around structures, and water availability to serve to the project site.

The HEIP PEIR determined the need for installation and maintenance of new infrastructure (such as roads, fuel breaks, emergency water resources, power lines, or other utilities) for future development projects would be evaluated as part of the discretionary permit review process. Therefore, impacts would be less than significant.

The HEIP PEIR determined impacts related to directly or indirectly causing potential substantial risks, including landslides, as a result of runoff, post-fire instability or drainage change would be less than significant because all future implementing projects would be required to have a site-specific geotechnical investigation, which would ensure that each development is engineered and constructed to maximize stability and preclude safety hazards to on-site areas. Additionally, all future development would be required to comply with City’s floodplain management regulations prepare a WQMP which would reduce runoff from construction and identify BMPs for runoff controls and treatments. Thus, impacts would be less than significant.

Impacts Associated with the Proposed Project
a) Substantially impair an adopted emergency response plan or emergency evacuation plan? No New Impact.

According to the HEIP PEIR Figure 4.11-1, Fire Hazard Severity Zones within the City, and the CAL FIRE Hazard Severity Zone map, the Project site not located within a State Responsibility Area (SRA) or a VHFHSZ (City of Yorba Linda, 2022; CAL FIRE, 2025). The Project site does not contain any emergency facilities, nor does it serve as an emergency evacuation route. Direct access to the Project site would be provided via one driveway on Yorba Linda Boulevard. The Project is required to design and construct internal access and provide fire suppression facilities (e.g., hydrants and sprinklers) in conformance with the YLMC, and OCFA would review the development plans prior to approval to ensure adequate emergency access pursuant to the requirements in Section 503 of the CFC (Title 24, California Code of Regulations, Part 9, included in the YLMC as Chapter 15.08. As a result, the proposed Project would not impair an adopted emergency response plan or emergency evacuation plan and would not result in new impacts. As such, the proposed Project is consistent with the findings of the HEIP PEIR and no new impact would occur. b) Due to slope, prevailing winds, and other factors, exacerbate wildfire risks, and thereby expose project occupants to pollutant concentrations from a wildfire or the uncontrolled spread of a wildfire?
No New Impact.

As described in the previous response, the Project site is not located within an SRA or a VHFHSZ. The Project site is relatively flat and the areas within the Project’s vicinity do not contain hillsides or other factors that could exacerbate wildfire risks. Therefore, the Project would not result in new or increased impacts related to exposure of people or structures to significant risk involving wildland fires. As such, the proposed Project is consistent with the findings of the HEIP PEIR and now new impact would occur. c) Require the installation or maintenance of associated infrastructure (such as roads, fuel breaks, emergency water sources, power lines or other utilities) that may exacerbate fire risk or that may result in temporary or ongoing impacts to the environment? No New Impact.

As described in the previous responses, the Project site is not within an SRA or a VHFHSZ. The Project site is located within an urbanized area within the City of Yorba Linda. The Project does not involve any new

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infrastructure (such as roads, fuel breaks, emergency water sources, power lines, or other utilities) that may exacerbate fire risks or result in other impacts to the environment. Therefore, the Project would result in no new or increased impacts. As such, the proposed Project is consistent with the findings of the HEIP PEIR and now new impact would occur.
d) Expose people or structures to significant risks, including downslope or downstream flooding or landslides, as a result of runoff, post-fire slope instability, or drainage changes? No New Impact.

As described in the previous responses, the Project site is not within an SRA or VHFHSZ. The Project would not result in substantial changes to the existing drainage pattern of the site. Additionally, the Project site is flat and is not susceptible to landslides. Likewise, areas adjacent to the Project site are relatively flat urban sites that do not contain hillsides or other factors that would expose people or structures to flooding or landslides as a result of runoff, post-fire slope instability, or drainage changes. The Project would not generate slopes and would connect to existing drainage facilities. Therefore, the Project would result in no new or increased impacts related to significant risks, including downslope or downstream flooding or landslides, as a result of runoff, post-fire slope instability, or drainage changes. As such, the proposed Project is consistent with the findings of the HEIP PEIR and now new impact would occur.

Conclusion
Based on the foregoing information, none of the conditions identified in State CEQA Guidelines Section 15162 that would trigger the need to prepare a subsequent or supplemental EIR or other environmental document to evaluate project impacts or mitigation measures exist regarding wildfire. There have not been (1) changes related to development of the Project site that involve new significant environmental effects or a substantial increase in the severity of previously identified effects; (2) substantial changes with respect to the circumstances under which development of the Project site is undertaken that require major revisions of the HEIP PEIR due to the involvement of new significant environmental effects or a substantial increase in the severity of previously identified effects; or (3) the availability of new information of substantial importance relating to significant effects or mitigation measures or alternatives that were not known and could not have been known when the HEIP PEIR was adopted as completed.

HEIP PEIR Mitigation Measures
MM 4.11-1 Prior to issuance of a grading permit for sites within or adjacent to a Very High FHSZ, the project applicant shall prepare a Fire Evacuation Analysis. The Fire Evacuation Analysis shall assess the time required for emergency evacuation under Existing and Existing with Project Conditions, assuming a worst case, wind-driven fire. The Fire Evacuation Analysis shall also identify how much the project would increase evacuation times by; how long it would take residents to evacuate; and how emergency response times would be affected by a mass evacuation under multiple scenarios. The Fire Evacuation Analysis shall be subject to the review and approval from the City of Yorba Linda and OCFA. The analysis shall demonstrate how the Project would not impair or physically interfere with an adopted emergency response plan or emergency evacuation plan.

Proposed Project Applicability: MM 4.11-1 is not applicable to the proposed Project because the Project site is not located within or adjacent to a Very High FHSZ.

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MM 4.11-2 Prior to issuance of a grading permit for sites within or adjacent to a Very High FHSZ, the project applicant shall prepare a Fire Protection Plan (FPP). Prior to preparation of an FPP, the Project proponent shall coordinate with OCFA to ensure that modeling of the FPP and design of the project is appropriate to meet the requirements and standards of the OCFA.

The FPP shall be subject to the review and approval from the City of Yorba Linda and OCFA. The FPP shall assess a project’s compliance with current regulatory codes and ensure that impacts resulting from wildland fire hazards have been adequately mitigated. The FPP shall also specifically identify the need for fire systems, water availability, construction requirements, and fire-resistant landscaping i.e. fuel modification zones), and appropriate defensible space around structures.

Proposed Project Applicability: MM 4.11-2 is not applicable to the proposed Project because the Project site is not located within or adjacent to a Very High FHSZ.

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6. CLASS 32 DETERMINATION
As described under Section 1.2 of this document, in addition to meeting the requirements of CEQA Guidelines Section 15168 and 15162, the Project would also qualify for a Class 32 In-Fill Exemption under CEQA Guidelines Section 15332. The analysis below provides substantial evidence that the proposed Project properly qualifies for an exemption under CEQA Guidelines Section 15332 (i.e., Class 32) and, as a result, would not have a significant effect on the environment. Additionally, the analysis shows there are no exceptions to qualifying for the Categorical Exemption, as identified in CEQA Guidelines Section 15300.2.

6.1. CLASS 32 INFILL EXEMPTION
CEQA Guidelines Section 15332 defines the Class 32 Infill Exemption as a project that meets the following five requirements:
a. General Plan and Zoning Consistency: The project is consistent with the applicable General Plan designation and all applicable General Plan policies as well as with applicable zoning designation and regulations.

The Project sites has a General Plan land use designation of Residential High (R-H) and a zoning designation of Residential Multiple-Family 20 (RM-20). The R-H General Plan land use designation is intended for residential development with a density of 4-30 du/ac. The RM-20 zoning district is intended to promote the development of multi-family rental as well as ownership dwelling units up to 20 units per acre. The proposed Project would construct 62 attached, townhome residential units on the 2.64-acre site, which would result in a density of 23 du/ac. The Project proposes to set aside three of the 62 proposed units, or five percent of the total units, for very-low income households. As set forth in YLMC Section 18.19.040, restricting 5 percent of the proposed units for very-low income households would afford the Project a 20 percent density bonus. mote the development of multi-family rental as well as ownership dwelling units up to 20 units per acre. Table 6-1 shows the proposed Project’s consistency with the RM-20 development standards, as well as applicable waivers. As shown, the Project would meet all the requisite development standards, including lot size, height, setback, and parking requirements with applicable waivers. Therefore, the proposed Project would be consistent with the applicable development standards.

Table 6-1: Project Consistency with Zoning Standards
Development Standard RM-20 Requirement Proposed Project Minimum lot size 1 acre Consistent. The Project site is 2.64- acres.

Maximum lot coverage 65 percent Consistent. 40 percent
Maximum building height 40 feet or 3 stories, whichever is less
Consistent. 35 feet
Minimum front yard setback 20 feet Consistent. 20 feet
Minimum side yard setback
(interior)
5 feet Consistent. 5 feet
Minimum rear yard setback 20 feet Consistent. 20 feet
Minimum dwelling size Studio = 550 sq. ft.
1 BR = 675 sq. ft.
2 BR = 700 sq. ft.

Consistent. The floor plans would
provide options for three to four
bedrooms, three to four bathrooms,

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3 BR = 900 sq. ft. and would range from 1,363 to
1,639 SF.

Minimum parking per dwelling unit1 3 Bedroom: 1.5 space/du 4 Bedroom: 2.5 spaces/du
Residential parking required: 122
spaces
Consistent. Waiver of minimum
parking requirements per provision
of income restricted units. The
Project proposes 137 parking
spaces.
1 Parking standards per State Density Bonus Law
Source: YLMC, Table 18.10-2, Residential Development Standards The Project is permitted subject to a VTTM, Density Bonus, and Design Review from the City of Yorba Linda. As demonstrated throughout this document, the Project is consistent with the site’s land use and zoning designation and would not conflict with any of the applicable General Plan goals and policies nor would it conflict with the Zoning Code. Therefore, the proposed Project meets the criteria of CEQA Guidelines Section 15332(a).
b. Project Location, Size, and Context: The proposed development occurs within city limits on a project site of no more than 5 acres substantially surrounded by urban uses.

The 2.64-acre Project site is located on Yorba Linda Boulevard in the City of Yorba Linda. The Project site is surrounding by single family residential homes to the north, Jessamyn West Park to the east, a single-family residential home to the southeast, Yorba Linda Boulevard to the south, and a synagogue with a learning center to the west. As the Project site is less than five acres and surrounded by urban uses, it meets the criteria of CEQA Guidelines Section 15332(b) c. Endangered, Rare, or Threatened Species: The project site has no value as habitat for endangered, rare, or threatened species.

As discussed in Section 5.2, Biological Resources, the Project site does not contain habitat for specialstatus plant species or plant communities. The BRA prepared for the Project site determined that the site has a high potential to support Cooper’s hawk and sharp-shinned hawk. However, the Project would require compliance with the MBTA, which prohibits the take of nesting birds and recommends preconstruction nesting bird surveys to be conducted if construction occurs during the nesting bird season between February through August. In order to comply with the MBTA, the Project Applicant/Contractor would conduct pre-construction nesting bird surveys three days prior to vegetation removal during the nesting bird season (generally February 1 through September 15 (PDF BIO-1). Therefore, with adherence to the provisions of the MBTA, potential impacts related to nesting birds, including Cooper’s hawk and sharp-shinned hawk, would be less than significant. Therefore, the proposed Project meets the criteria of CEQA Guidelines Section 15332(c).
d. Significant Effects: Approval of the project would not result in any significant effects relating to traffic, noise, air quality, or water quality.

As discussed in Section 5, Environmental Analysis, the proposed Project would not result in any significant impacts related to traffic, noise, air quality, or water quality. Therefore, the proposed Project meets the criteria of CEQA Guidelines Section 15332(d).
e. Utilities: The site can be adequately served by all required utilities and public services.

The Project site is currently developed with a single-family residence that is served by existing utilities and public services. The Project would be served by Yorba Linda Water District for water and sewer services. The Project would install new 8-inch private water lines on-site which would connect to the existing 8-inch domestic water main in Yorba Linda Boulevard. Additionally, the Project would install

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new 8-inch private sewer lines on-site which would connect to the existing 8-inch sanitary sewer within the Yorba Linda Boulevard median. Project drainage infrastructure would connect to a parkway drain in Yorba Linda Boulevard.

Additionally, SCE would provide electrical service for the Project. There is an existing overhead electrical line that extends halfway over the eastern portion of the Project site and connects to an existing power pole located within the central area of the eastern half of the site. Both the existing overhead line and power pole would be removed. The Project would install underground electric lines that would connect to existing SCE infrastructure in adjacent roadways. No natural gas use is proposed for the Project.

Additionally, as described under section 5.7, Public Services, OCFA and OCSD have adequate capacity to serve the Project site. Therefore, the proposed Project meets the criteria of CEQA Guidelines Section 15332(e).

6.2. EXEMPTION EXCEPTIONS
In addition to meeting the five requirements stated above, the CEQA Guidelines Section 15300.2 provides specific instances where exceptions apply to a project that would otherwise meet the requirements for an exemption. These exceptions are:
a. Criterion 1500.2(a) – Location: The location exception states that Classes 3 (New Construction of Small Structures), 4 (Minor Alterations to Land), 5 (Alterations in Land Use Limitations), 6 (Information Collection), and 11 (Accessory Structures) are qualified by consideration of where the project is to be located – a project that is ordinarily insignificant in its impact on the environment may in a particularly sensitive environment be significant. Therefore, these classes are considered to apply all instances, except where the project may impact on an environmental resource of hazardous or critical concern where designated, precisely mapped, and officially adopted pursuant to law by federal, State, or local agencies.

The Project does not qualify for an exemption under Classes 3, 4, 5, 6 or 11. The Project is located within an urban developed area and is not located within a sensitive environment. In addition, the Project would not result in any impacts on an environmental resource of hazardous or critical concern. Therefore, the exception under criterion 15300.2(a) is not applicable b. Criterion 1500.2(b) – Cumulative Impact: All exemptions for these classes are inapplicable when the cumulative impact of successive projects of the same type in the same place, over time is significant.

The proposed Project would redevelop a site that is currently developed with an existing single-family residence. The Project site is already served by utilities and public services, as well as transportation.

Any construction effects would be temporary, confined to the Project vicinity, and reduced to a less-thansignificant level by implementing existing applicable regulatory requirements. Therefore, the Project’s impacts would be less than significant and not cumulatively considerable. No successive projects of the same or similar use within the vicinity of the Project are known or expected to occur over time that would result in cumulatively considerable impacts. Furthermore, as discussed throughout this justification document, the proposed Project would not result in significant environmental impacts that would be capable of combining with impacts from other cumulative projects to result in a cumulative impact.

Therefore, the exception under CEQA Guidelines Section 15300.2(b) does not apply to the Project. c. Criterion 1500.2(c) – Significant Effects: A Categorical Exemption shall not be used for an activity where there is a reasonable possibility that the activity will have a significant effect on the environment due to unusual circumstances.

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There are no known unusual circumstances that are applicable to the Project, which may result in a significant effect on the environment. The proposed Project consists of the development of 62 attached, townhome residential units on a site that is currently developed with a single-family residence and is already served by utilities and transportation. The Project site would also be consistent with the City’s General Plan and the Municipal Code. Thus, provision of a professional office building would not introduce a new activity to the area that could result in a significant effect on the environment. Therefore, the exception under CEQA Guidelines Section 15300.2(c) does not apply to the Project. d. Criterion 1500.2(d) – Scenic Highways: A Categorical Exemption shall not be used for a project which may result in damage to scenic resources, including but not limited to, trees, historic buildings, rock outcroppings, or similar resources, within a highway officially designated as a State scenic highway. This does not apply to improvements which are required as mitigation by an adopted negative declaration or certified EIR.

As described under Section 4.2, there are no State, County, or locally designated scenic highways in the City. therefore, the exception under CEQA Guidelines Section 15300.2(d) does not apply to the Project. e. Criterion 1500.2(e) – Hazardous Waste Sites: A Categorical Exemption shall not be used for a project located on a site which is included on any list complied pursuant to Section 65962.5 of the Government Code.

As described under Section 4.2, the HEIP PEIR determined none of the housing opportunity sites are identified on any hazardous materials databases compiled pursuant to Government Code Section 65962.5. Therefore, the exception under CEQA Guidelines Section 15300.2(e) does not apply to the Project.
f. Criterion 1500.2(f) – Historical Resources: A Categorical Exemption shall not be used for a project which may cause a substantial adverse change in the significance of a historical resource.

As described under Section 4.2, the Project site does not contain any historical resources. Therefore, the exception under CEQA Guidelines Section 15300.2(f) does not apply to the Project.

Conclusion
On the basis of the evidence provided above, the proposed Project is eligible for a Class 32 Categorical Exemption in accordance with Section 15332 of the CEQA Guidelines. Because the proposed Project meets the criteria for categorically exempt development projects listed in CEQA Guidelines Section 15332 and it would not have a significant effect on the environment, this analysis finds that a Notice of Exemption may be prepared for the Project.

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7. REFERENCES
Airport Land Use Commission. (2019). Airport Environs Land Use Plan for Fullerton Municipal Airport.

Retrieved July 11, 2025, from https://files.ocair.com/media/2021- 02/AELUP%20for%20FMA%2005092019.pdf?VersionId=Pe0mNdYdt9RPkWpfPFbhCmkVI4zej Gxs
Alta California Geotechnical Inc. (n.d.). Geotechnical Investigation 19081 Yorba Linda Boulevard, City of Yorba Linda, California. (Appendix A).

California Department of Conservation. (November 1, 2024). Earthquake Zones of Required Investigation.

Retrieved May 21, 2025, from
https://maps.conservation.ca.gov/cgs/informationwarehouse/eqzapp/ California Department of Finance (CDOF). (May 2025). E-5 Population and Housing Estimates for Cities, Counties, and the State, 2020-2025. Retrieved July 14, 2025, from https://dof.ca.gov/forecasting/demographics/estimates/e-5-population-and-housing-estimatesfor-cities-counties-and-the-state-2020-2025/ California Department of Forestry and Fire Protection (CAL FIRE). (May 2025). Fire Hazard Severity Zones.

Retrieved June 10, 2025, from https://osfm.fire.ca.gov/what-we-do/community-wildfirepreparedness-and-mitigation/fire-hazard-severity-zones California Department of Transportation (Caltrans). (2020a). Technical Noise Supplement to the Traffic Noise Analysis Protocol. Retrieved July 29, 2025, from https://dot.ca.gov/-/media/dotmedia/programs/environmental-analysis/documents/env/traffic-noise-protocol-april-2020- a11y.pdf
California Department of Transportation (Caltrans). (2020b). Transportation and Construction Vibration Guidance Manual. Retrieved July 29, 2025, from https://dot.ca.gov/-/media/dotmedia/programs/environmental-analysis/documents/env/tcvgm-apr2020-a11y.pdf City of Yorba Linda. (2016a). 2016 General Plan Land Use Map. Retrieved May 21, 2025, from https://www.yorbalindaca.gov/DocumentCenter/View/465/2016-General-Plan-Land-Use-MapPDF?bidId= City of Yorba Linda. (2016b). City of Yorba Linda General Plan Draft Environmental Impact Report.

Retrieved June 17, 2025, from
https://www.yorbalindaca.gov/DocumentCenter/View/510/Yorba-Linda-2016-General-PlanDEIR-PDF?bidId= City of Yorba Linda. (2016c). 2016 Yorba Linda General Plan. Retrieved August 12, 2025, from https://www.yorbalindaca.gov/337/General-Plan
City of Yorba Linda. (February 12, 2019). City of Yorba Linda Official Zoning Map. Retrieved May 21, 2025, from https://www.yorbalindaca.gov/DocumentCenter/View/466/City-of-Yorba-LindaZoning-Map-PDF City of Yorba Linda. (June 2022). Draft Program Environmental Impact Report SCH No., 2022040574.

Retrieved May 21, 2025, from https://www.yorbalindaca.gov/341/Environmental-Documents C&V Consulting, Inc. (March 2025a). Preliminary Hydrology Study Tentative Tract Map No. 19389, 19081 Yorba Linda Blvd City of Yorba Linda, County of Orange. (Appendix D).

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C&V Consulting, Inc. (March 2025b). Preliminary Water Quality Management Plan (PWQMP). (Appendix E).

ELMT Consulting. (June 27, 2025). Biological Resources Assessment for the Proposed Project Located at 19081 Yorba Linda Boulevard in the City of Yorba Linda, Orange County, California. (Appendix G).

EPD Solutions, Inc. (August 4, 2025a). Air Quality and Greenhouse Gas Impact Analysis for the 19081 Yorba Linda Boulevard Residential Project. (Appendix F).

EPD Solutions, Inc. (August 2025b). 19081 Yorba Linda Boulevard Residential Project Noise and Vibration Impact Analysis. (Appendix H).

EPD Solutions, Inc. (May 28, 2025c). Vehicle Miles Traveled (VMT) Screening Analysis. (Appendix I).

Federal Emergency Management Agency (FEMA). (December 3, 2009). Flood Insurance Rate Map Number 06059C0068J. Retrieved June 17, 2025, from
https://msc.fema.gov/portal/search?AddressQuery=19081%20Yorba%20Linda%20Blvd%2C% 20Yorba%20Linda%2C%20CA
Federal Interagency Committee on Noise. (1992). Federal Agency Review of Selected Airport Noise Analysis Issue. Retrieved June 9, 2025, from
https://www.faa.gov/sites/faa.gov/files/reports_noise_analysis.pdf Southern California Association of Governments (SCAG). (April 4, 2024). Demographics & Growth Forecast.

Retrieved July 14, 2025, from https://scag.ca.gov/sites/default/files/2024-05/23-2987-trdemographics-growth-forecast-final-040424.pdf South Coast Air Quality Management District (SCAQMD). (2010). Minutes of the GHG CEQA Significance Threshold Stakeholder Working Group #15. Retrieved August 12, 2025, from http://www.aqmd.gov/docs/default-source/ceqa/handbook/greenhouse-gases-(ghg)-ceqasignificance-thresholds/year-2008-2009/ghg-meeting-15/ghg-meeting-15-minutes.pdf Stantec. (April 20, 2022a). Phase I Environmental Site Assessment 19081 Yorba Linda Boulevard Yorba Linda, California 92886. (Appendix B).

Stantec. (July 7, 2022b). Phase II Environmental Site Assessment 19081 Yorba Linda Boulevard Yorba Linda, California 92886. (Appendix C).

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YORBA LINDA & OHIO
YORBA LINDA, CA PHONE NO. CITY VENTURES 3121 MICHELSON DRIVE SUITE 150 IRVINE, CALIFORNIA 92612 949.258.7555 No. Date Description CHK. BY: R.M.L. SWG No. CIT251755 It is the clients responsibility prior to or during construction to notify the architect in writing of any perceived errors or omissions in the plans and specifications of which a contractor thoroughly knowledgeable with the building codes and methods of construction should reasonably be aware. Written instructions addressing such perceived errors or omissions shall be received from the architect prior to the client or clients subcontractors proceeding with the work. The client will be responsible for any defects in construction if these procedures are not followed. ELECTRICAL SITE PLAN SCALE: 1" = 20'-0" 1 ELECTRICAL SITE PLAN ES1 Page 652 of 980
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0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 COPYRIGHT C Developer License Stamp

ALTERNATIVE

ANALYSIS

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19030 LYNN
LANE

RESIDENCE

EQUESTRIAN
TRAIL

PROPOSED

TOWNHOME

COMMUNITY

TREES FOR

SCREENING PROPOSED

GRADE EQUESTRIAN SETBACK

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19030 LYNN
LANE

RESIDENCE

EQUESTRIAN
TRAIL

PROPOSED

TOWNHOME

COMMUNITY

TREES FOR

SCREENING PROPOSED
GRADE

VISUALLY
SEEING
2-STORY

PORTION EQUESTRIAN SETBACK

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RESOLUTION NO. 2026-5974

A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF

YORBA LINDA UPHOLDING THE DECISION OF THE

PLANNING COMMISSION APPROVING TENTATIVE TRACT
MAP 19389 – CITY VENTURES, WITH CONDITIONS
WHEREAS, an application for Tentative Tract Map 19389 was made by City Ventures, 3121 Michelson Street, Suite 150, Irvine, California, 92612, to subdivide 2.65 acres into a single lot for condominium purposes for the development of a 62-unit townhome residential community located at 19081 Yorba Linda Boulevard, generally located east of Ohio Street, west of Palm Avenue and north of Yorba Linda Boulevard within the R-M-20 (Residential Multiple-Family 20) zone, APN: 323-081-35, and, WHEREAS, in accordance with all the land use application review requirements and procedures contained in the City of Yorba Linda Municipal Code, and the requirements of other applicable local, state and federal agencies, on November 12, 2025, and December 10, 2025, the Planning Commission reviewed this matter at a duly noticed public hearing; and,
WHEREAS, the Planning Commission, by 3-1-1 motion action, approved Tentative Tract Map 19389, with conditions of approval; and,
WHEREAS, on December 18, 2025, subsequent to the Planning Commission’s approval action, an appeal of the Planning Commission’s action to approve Tentative Tract Map 19389 was filed with the City of Yorba Linda, in accordance with Section 18.36.820 of the Yorba Linda Zoning Code; and,
WHEREAS, Section 18.36.820 of the Yorba Linda Zoning Code requires that the appeal be considered by the City Council of the City or Yorba Linda at a public hearing, and notice of such public hearing concerning the project was given in accordance with applicable law; and,
WHEREAS, on February 3, 2026, a public hearing on Tentative Tract Map 19389 was held by the City Council and continued to allow additional time for the applicant to conduct additional analysis and meet with the appellant and other residents that raised concerns; and,
WHEREAS, on March 3, 2026, the City Council reviewed the additional information and considered the Planning Commission’s action to approve this project, including the findings upon which the Planning Commission based its approval actions, and all of the conditions of approval, contained within Resolution No. 5652; and, WHEREAS, after consideration of the staff report and all of the information, testimony, and evidence presented at the public hearing, the City Council of the City of Yorba Linda does hereby find that with incorporation of the conditions attached hereto as Exhibit "A" and all mitigation measures described in the previously certified Program EIR

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and Addendum (State Clearinghouse No. 2022040574) of the California Environmental Quality Act (CEQA for the Yorba Linda 2021-2029 Housing Element and Implementation Programs prepared in support of the Housing Element, which included the subject development site among thirteen (18) housing sites contemplated as part of the Housing Element Implementation Programs:
(1) The proposed map will be consistent with the City's General Plan in that it is compatible with the objectives, policies, general land uses and programs specified in the General Plan, and will be consistent with all other aspects of the General Plan.
(2) The proposed map will be consistent with the current zoning on the property. (3) The design and improvement of the proposed subdivision as designated on the subject Tentative Tract Map will be consistent with the City's General Plan in that it will be compatible with the objectives, policies, general land uses and programs specified in the General Plan, including:
(a) Street alignments, grades and widths;
(b) Drainage and sanitary facilities and utilities, including alignments and grades thereof;
(c) Location and size of all required easements and rights-of-way; (d) Lot size and configuration;
(e) Traffic access;
(f) Grading;
(g) Land to be dedicated for park or recreational purposes; and (h) Such other specific requirements in the plan and configuration of the entire subdivision as may be necessary to insure conformity to or implementation of the General Plan.
(4) The site is physically suitable for the type of development in that the infrastructure and utilities either already serve the site or can be readily expanded to serve the site, and there are no intractable topographical peculiarities associated with the physical character of the property that may prevent the development of multiple-family residential dwellings as part of a condominium residential community.
(5) The site is physically suitable for the proposed multiple-family residential dwellings as part of a condominium residential community in that the applicant has submitted a conceptual development plan which illustrates that the proposed project may be constructed on the site without adversely affecting

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the health, safety, or welfare of anyone who will utilize the development or anyone living within the surrounding community.
(6) The design of the subdivision and type of improvements are not likely to cause serious public health problems in that the proposed subdivision, upon approval of associated and requested incentives for providing affordable units, will comply with all requirements and development standards prescribed within the Yorba Linda General Plan and Zoning Code.
(7) The design of the subdivision and the type of improvements will not conflict with easements, acquired by the public at large, for access through or use of, property within the proposed subdivision.
(8) The discharge of waste from the proposed subdivision into the existing sewer system will not result in a violation of existing requirements prescribed by the applicable California Regional Quality Control Board.
(9) The design of the subdivision provides, to the extent feasible, for passive or natural heating or cooling opportunities in the subdivision in that each building’s size, shape and design configuration permits the existing orientation of the planned development to take advantage of existing sun and shade opportunities.
(10) When considering the record as a whole, there is no evidence before the City that the proposed project will have the potential for adverse effect on wildlife resources or the habitat upon which the wildlife depends. (11) The City Council has considered the effect of the proposed map on the housing needs of the region in which the City is situated and has balanced these needs against the public service needs of its residents and available fiscal and environmental resources, and finds that the proposed map does not detrimentally affect housing in the area, or place an undue burden on public service needs and available fiscal and environmental resources. (12) As this project involves no repeal, amendment, or adoption of all or any part of the land use planning policy documents as specified in Section 18.01.020 of the Yorba Linda Municipal Code, this project is exempt from the provisions of Chapter 18.01 of the Yorba Linda Municipal Code, also known as the “Yorba Linda Right-to-Vote Amendment.”
(13) The remaining sites identified in the Housing Element are adequate to accommodate the City’s share of housing so as to satisfy its regional housing need.
(14) The project is exempt from CEQA pursuant to Title 14, California Code of Regulations, Section 15168 in that it is a subsequent action within the scope of the certified PEIR for the 2021-2029 Housing Element and Addendum.

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The City has determined that the project’s environmental effects were adequately analyzed in those documents and that applicable mitigation measures will reduce impacts to less-than-significant levels. A CEQA consistency analysis further confirmed that the project would not introduce new significant impacts or substantially increase previously identified impacts, and therefore no supplemental environmental documentation is required. The project is also eligible for a Class 32 (In-Fill Development) Categorical Exemption, and is therefore exempt from requirements of the California Environmental Quality Act (CEQA) pursuant to Title 14, California Code of Regulations, Section 15332.

NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of Yorba Linda does hereby uphold the decision of the Planning Commission, and approve Tentative Tract Map 19389, subject to the conditions of approval shown on Exhibit "A" attached to this Resolution and all mitigation measures described in the certified Final Environmental Impact Report for the Yorba Linda 2021-2029 Housing Element and Implementation Programs, and which is by reference incorporated herein.

PASSED AND ADOPTED at a regular meeting of the City Council of the City of Yorba Linda on this 3rd day of March, 2026.

CARLOS RODRIGUEZ, MAYOR

CITY OF YORBA LINDA
ATTEST:

MARCIA BROWN, CITY CLERK

CITY OF YORBA LINDA
APPROVED AS TO FORM:

RUTAN & TUCKER, LLP

CITY ATTORNEY

STATE OF CALIFORNIA )
ss.

COUNTY OF ORANGE )
I, MARCIA BROWN, City Clerk of the City of Yorba Linda, California, DO HEREBY CERTIFY that the foregoing Resolution was duly adopted at a regular meeting of the City Council of the City of Yorba Linda held on the 3rd day of March 2026, and was carried by the following roll call vote:

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AYES: COUNCILMEMBERS:

NOES: COUNCILMEMBERS:

ABSENT: COUNCILMEMBERS:

MARCIA BROWN, CITY CLERK

CITY OF YORBA LINDA

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EXHIBIT “A”
CONDITIONS OF APPROVAL FOR TENTATIVE TRACT MAP 19389 –

CITY VENTURES
Eng. 1. The applicant shall obtain an encroachment permit for all work within the City right of way.

2. Best Management Practices (BMPs) shall be used during construction in accordance with the Construction Runoff Guidance Manual for Contractors, Project Owners, and Developers to prevent pollutants, construction materials, and soil from entering the storm drain.

3. Prior to grading permit/building permit, the proposed improvements shall comply with the California Building Code latest edition. Drainage and structural setbacks to slopes shall comply with the minimum requirements.

4. Prior to grading permit/building permit, the applicant shall apply for and obtain a transportation permit that identifies the disposition of all imported or exported soil and a haul route. The applicant shall demonstrate that the imported soil is clean and suitable for the intended use, and that exported soil complies OCFA and OC Environment Health Department. A geotechnical analysis may be required.

5. Prior to grading permit/building permit, retaining walls shall be designed to have waterproofing applied to the retaining side of the wall, subdrain, and subdrain outlets. The subdrain outlets detail shall be indicated on the retaining wall plan and grading plan. Storm water runoff shall be conveyed away from the retaining wall or mitigated with drainage system.

6. Prior to grading permit, a complete final hydrology and hydraulic study shall be prepared by a qualified engineer to the satisfaction of the City Engineer.

7. Prior to grading permit, an Emergency overflow is required at all sump locations. Slopes shall be armored, or a drainage conveyance facility shall be designed where emergency overflow is proposed.

8. Prior to grading permit, grading of the project may be performed in phases subject to an approved grading phase plan. Each grading phase shall have a standalone rough grading plan, hydrology and hydraulics analysis, and grading security to the satisfaction of the City Engineer.

9. Prior to grading permit, individual lot drainage shall be designed to convey flows to an acceptable drainage system or outlet to the street or by other lot drainage design to the satisfaction of the City Engineer.

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10. Prior to grading permit, a soils report shall be prepared by a qualified engineer to the satisfaction of the City Engineer.

11. Prior to grading permit, any grading required outside of the project boundaries will require either slope easements or right-ofentry/permission to grade letters from the adjacent property owners.

12. Prior to grading permit, applicant shall submit sewer and water plans to the Yorba Linda Water District for determination of the Terms and Conditions for Water and/or Sewer Service.

13. Prior to grading permit, drainage facilities that discharge onto adjacent properties shall be designed in such a manner as to convey storm surface water as it historically crosses said property line in its natural state or a drainage acceptance instrument may be obtained from the downstream property owner if the historic drainage flow is affected in an adverse manner.

14. Prior to grading permit, an erosion and sediment control plan shall be submitted at the time of Grading Plan review and be accepted by the City Engineer.

15. Prior to grading permit, grading of the subject property shall be in compliance with the Grading Ordinance and to the satisfaction of the City Engineer.

16. Prior to grading permit, a grading plan shall be submitted for review and approval. Grading shall be in significant conformance to the Tentative Tract Map and the proposed grading as approved by the Planning Commission.

17. Prior to grading permit, surety shall be posted to the satisfaction of the City Engineer and the City Attorney guaranteeing completion of grading within the project.

18. Prior to grading permit, a Priority Water Quality Management Plan (WQMP) shall be submitted with the grading plan for review and accepted by the City Engineer. A Maintenance Agreement outlining the postconstruction Best Management Practices (BMPs) shall be executed. All costs associated with the review, installation and/or maintenance of the plan and project-related BMPs shall be the responsibility of the applicant.

19. Prior to grading permit, the applicant shall comply with the National Pollution Discharge Elimination System (NPDES) permit from the California Regional Water Quality Control Board (Santa Ana Region).

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20. Prior to grading permit, the applicant shall file any required documents, including but not necessarily limited to the notice of intent, and comply with permits from the California Regional Water Quality Control Board.

21. Prior to grading permit, the applicant shall submit a Storm Water Pollution Prevention Plan (SWPPP) for the review and accepted by the City Engineer. The SWPPP shall describe the construction phase Best Management Practices (BMPs) to ensure compliance with the NPDES General Permit for storm water discharges associated with construction activity.

22. Prior to grading permit, No proprietary biotreatment water quality treatment systems will be permitted within the public right-of-way.. Water quality treatment systems shall be incorporated into the site design and privately maintained by future Homeowners Association..

23. Prior to grading permit, private roads shall be designed to comply with the requirements of Orange County Fire Authority - Fire Master Plans for Commercial and Residential Development, Guideline B-09. Private road structural sections shall be based on recommendations of a soils engineer and approved by the City Engineer.

24. Prior to grading permit, existing easement quitclaims for must be completed.

25. Prior to grading permit, offsite run-on from abutting properties must be addressed by demonstrating how flows will be conveyed. Acceptance of existing sheet flows must be called out if the flows are historical. Run-on sheet flows shall also be addressed in the pre & post development hydrology maps.

26. Prior to grading permit, excavation quantities including cut, fill, and disturbed area must be provided.

27. Prior to building permit, trash receptacles shall be enclosed by a 6-foothigh decorative masonry block wall with approved gates and latches designed to withstand foreseeable use and abuse. Trash receptacles shall also conform with NPDES standards, which may include provisions for a solid roofed cover, an area drain connected to the sanitary sewer system, and a hot water hose bib. Location and design shall be subject to review and approval by the City Engineer and Community Development Director. Ensure that trash enclosure shall accommodate a 3-container system adhering to state mandates, including SB 1383 Organics which built on and expanded AB 1826 Commercial Organics, and AB 341 Commercial Recycling.

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28. Prior to model homes building permit, a model home precise grading plan shall include all proposed improvements and parking lot to be constructed to the satisfaction of the City Engineer.

29. Prior to modeling home building permit, issuance is subject to payment of fees, improvements, and the approval of the City, MWD, YLWD, and OCFA.

30. Prior to building permit, a rough grade certificate, final rough grade report, and individual lot compaction tests shall be provided by a licensed Civil Engineer and Geotechnical Engineer.

31. Prior to building permit, the proposed improvements shall comply with sight distance design requirements of OCPW standard plan 1117 and City Zoning Ordinance 18.26 vision triangle.

32. Prior to building permit, a street lighting plan indicating location, size and type of existing and proposed street lighting shall be prepared by the applicant and submitted along with the improvement plans for review and approval by the City Traffic Engineer.

33. Prior to building permit, all exterior street improvements shall be constructed to the satisfaction of the City Engineer.

34. Prior to building permit, all proposed utilities within the project shall be installed underground in accordance with current utility engineering practices. Existing aerial utilities shall be removed and/or placed underground.

35. Prior to building permit, all street lighting shall meet the equipment and illumination standards of the City to the satisfaction of the City Engineer.

36. Prior to building permit, applicant is responsible to ensure that a minimum 2-inch PVC conduit or smaller, if approved by the appropriate utility companies and the City Engineer, is installed in the open common trench.

37. Prior to building permit, applicant shall provide a free trench to the CATV operator and give said operator reasonable notice of when open trench is available.

38. Prior to building permit, drainage facilities and easements shall be provided in accordance with the Master Plan of Drainage and to the specifications of the City Engineer.

39. Prior to building permit, driveways in excess of 75 feet in length, or excessively sloped and/or curved more than 45 degrees shall incorporate

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“hammerhead” turnaround spaces near the garage to the satisfaction of the City Traffic Engineer.

40. Prior to building permit, parking lot or parking stall structural sections shall be based on recommendations of a soils engineer and approved by the City Engineer.

41. Prior to building permit, private roads shall be constructed to the requirements of Orange County Fire Authority - Fire Master Plans for Commercial and Residential Development, Guideline B-09. Private road structural sections shall be based on recommendations of a soils engineer and approved by the City Engineer.

42. Prior to building permit, street improvement plans prepared on standard size sheets by a licensed Civil Engineer shall be submitted for approval by the City Engineer. Standard plan check and inspection fees shall be paid by the applicant.

43. Prior to building permit, street striping and signing plans shall be prepared by the applicant to the satisfaction of the City Engineer and included with the initial submittal of the improvement plans.

44. Prior to building permit, the City Engineer and Building Official will not authorize the issuance of any or all building permits unless and until in the City Engineer's opinion, traffic to be generated may be accommodated adequately on surrounding thoroughfares due to the completion of improvements, adverse effects of a natural event, or for the protection of public health, safety, and welfare.

45. Prior to building permit, the development shall participate in the Eastern Transportation Corridor Fee Program at the established rate.

46. Prior to building permit, the precise location of new or relocated monument signs shall be subject to the final review and approval of the City Traffic Engineer.

47. Prior to building permit, this project is applicable to the requirements of the Growth Management Plan (GMP) and shall be subject to payment of Traffic Impact Mitigation (Measure M) and as established by the Development Mitigation Program.

48. Prior to building permit, utility plans shall be subject to review and approval by the Community Development Director and City Engineer.

The City shall have the right to comment, modify, approve or disapprove the utility plan for each utility.

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49. Prior to map recordation, parking restrictions resultant of minimum width streets shall be identified in the project CC&R’s.

50. Prior to map recordation, reciprocal access easements shall be provided on the final map insuring access to all parcels over private roads to the satisfaction of the City Engineer.

51. Prior to map recordation, reciprocal drainage easements or lettered lot shall be provided on the final map for cross lot drainage to the satisfaction of the City Engineer.

52. Prior to map recordation, surety shall be posted and an agreement executed to the satisfaction of the City Engineer and the City Attorney, guaranteeing completion of the public improvements. NOTE: Upon acceptance of the public improvements by the City Council, the City will release the Monumentation Bond immediately, release the Labor and Materials Bond in 180 days, and reduce the Grading and Faithful Performance Bonds to 10% of the original amount and release in one year if no liens have been filed.

53. Prior to map recordation, the applicant shall participate in the Master Plan of Drainage at the established fee and shall be responsible for the construction of all on-site drainage facilities as required by the City Engineer.

54. Prior to map recordation, the applicant shall participate in the Sewer Master Plan and pay the associated fees at the applicable rate.

55. Prior to map recordation, the surveyor/engineer preparing the map shall submit to the County Surveyor a digital graphics file of said map in a manner described in Sections 7-9-330 and 7-9-337 of the Orange County Subdivision Code and Orange County Subdivision Manual, Subarticle 18.

56. Prior to map recordation, the surveyor/engineer preparing the map shall tie the boundary of the map into the Horizontal Control System established by the County Surveyor in a manner described in Sections 7- 9-330 and 7-9-337 of the Orange County Subdivision Code and Orange County Subdivision Manual, Subarticle 18.

57. Prior to map recordation, those portions of the subject property proposed to be held under common ownership shall be labeled as such and identified by a separate lot number/letter on the final map.

58. Prior to map recordation, utility easements shall be provided to the specifications of the appropriate utility companies and the City Engineer.

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59. Prior to map recordation, vehicular access rights to arterials and local collectors shall be dedicated to the City of Yorba Linda and labeled on the final map to the satisfaction of the City Engineer.

60. Prior to map recordation, public street right-of-way dedications shall conform to OCPW Std. Plan 1111 Curb Return Radius And Corner CutOff.

61. Prior to certificate of occupancy, street trees shall be designed and installed in the [INSERT STREET NAME} parkway at approximately 35’ center on center spacing to the satisfaction of the City Public Works Director. A landscape plan shall be required and identify limited use areas based on a sight distance analysis per OCPW standard plan 1117 and Chapter 18 of the Yorba Linda Zoning Code.

62. Prior to occupancy, all required street striping and traffic/parking regulatory signing shall be installed to the satisfaction of the City Traffic Engineer.

63. Prior to occupancy, water supply facilities shall be designed and constructed to the specifications of the Yorba Linda Water District and the City Engineer and dedicated to the Yorba Linda Water District with all incidental fees paid by the applicant.

64. Prior to occupancy, sewer facilities shall be designed and constructed to the specifications of the Yorba Linda Water District by the applicant to the satisfaction of the City Engineer and/or the Yorba Linda Water District.

65. Prior to occupancy, street lighting shall be installed by the applicant per the equipment and illumination standards of the City and Southern California Edison Company. A streetlight plan shall be prepared by the applicant and included with the initial submittal of the improvement plans.

A 36-month advance energy charge deposit to SCE is required at the time of the streetlight authorization.

66. Prior to occupancy, a final grade certificate and final grade soils report or letter shall be provided by a licensed Civil Engineer and Geotechnical Engineer.

67. Prior to occupancy, a fair share cost shall be contributed towards the re-paving and restoration of Yorba Linda Boulevard.

68. Prior to paving, all proposed gas mains and services shall be installed within the proposed streets.

69. Prior to paving, all street structural sections shall be submitted to, and approved by the City Engineer. Interim street structural sections that are

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constructed without the final course shall be sized for the anticipated vehicular loads and duration.

70. Prior to improvement security release, all catch basins and public access points that cross or abut an open channel shall be marked with a water quality message in accordance with City Standards.

Bldg. 71. Prior to final inspection by the Building Division, developer shall contact Orange County Fire Authority (OCFA) to request final inspection of on and off-site fire-related improvements. Final site inspection must be requested by contacting Inspection Scheduling OCFA at (714) 744-0567. Developer shall provide proof of compliance with all OCFA conditions of approval to the Building Division prior to issuance of occupancy certificates and final release of occupancy.

72. Developer is hereby notified that utility release will be authorized by the Building Official only after the project is determined complete in accordance with the approved plans, and when all other department and agency approvals and conditions have been met.

73. Class A fire-rated roofing material shall be provided for all buildings. In addition, roofing material must be installed to meet high wind velocity (85 mph) and exposure “C” standards.

74. This project shall be subject to applicable school fees, the payment of which shall be documented to the satisfaction of the Building Official prior to the issuance of building permits.

75. Applicant shall contact the California Department of Conservation, Division of Oil and Gas and Geothermal Resources (DOGGR) and report findings to the Building Division early on and prior to issuance of a building permit.

76. When project/development is within an area of current or former oil production, applicant shall prepare and submit to the Building Division complete, self-contained professional reports (with conclusive results) addressing oil well abandonment, venting, testing, and agency permits and clearances. Some of the involved agencies are: State Department of Conservation, Division of Oil, Gas and Geothermal Resources (DOGGR), Orange County Fire Authority (OCFA) and Orange County Health Care Agency (OCHCA). Reports shall be submitted to the Building Division three months before submittal of working drawings for plan check.

77. All structures, including light standards/canopies, shall be designed in accordance with Section 1609 for the wind design and Section 1613

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seismic design of the 2022 California Building Code and wind loading based on a velocity of 110 mph and exposure “C” standards of the latest adopted edition of the California 2022 Building Code.

78. Existing structures proposed to be demolished shall be removed to the satisfaction of the Building Official. City Council review and approval is required prior to issuance of a demolition permit.

79. Existing septic tanks, drywells, and/or cesspools shall be identified, removed, and filled to the satisfaction of the Building Official prior to any demolition of structures, grading, or construction of new structures.

80. All walls and fences constructed by the developer at side or rear property lines shall meet the minimum standards for pool enclosures as specified by Chapter 15.32 of the Yorba Linda Municipal Code.

81. Development shall comply with the latest adopted California Building Code, California Building Security Code, California Mechanical Code, California Plumbing Code, The National Electrical Code, State Building Standards Title 24, and all other applicable codes.

82. Applicant shall satisfy all requirements of the Orange County Fire Authority prior to issuance of building permits, or, at the discretion of the Building Official, prior to final inspection and release of occupancy. Contact Orange County Fire Authority at (714) 744-0499 for requirements.

83. At the completion of construction, and prior to occupancy, interior and exterior CNEL shall be determined by field testing at developer’s expense. Tests shall be conducted by a recognized acoustical expert.

No occupancy permits shall be granted until field test results meet the satisfaction of the Building Official in accordance with Appendix Chapter 12 of the California Building Code (latest adopted edition) “Sound Transmission Control.”

84. All Construction and Development shall comply with the latest adopted California Building Code, California Residential Code, California Mechanical Code, California Plumbing Code, The California Electrical Code, California Green Building Standards Code, State Building Standards Title 24, and all other applicable codes.

85. Plans shall be rendered legible and usable. Separate sheets shall be provided for distinctly different aspects of the proposed project. Plan sheets shall be clearly labeled with sheet numbers on the bottom rightPage 672 of 980 hand corner and each sheet included in the set shall be included in a sheet index provided on the cover sheet.

86. The project shall comply with all applicable disabled access requirements.

87. It is highly suggested the owner consult with a Certified Access Specialist (CASp) during the design and construction phases.

88. Deferred submittals shall be reviewed and approved by the design professional prior to being submitted to the city.

89. A survey is required to accurately determine the property lines and/or building location.

90. Plans must indicate if the existing building is protected by an automatic sprinkler system. Projects that require a new Fire Sprinkler System to be installed shall have the cover sheet notated “FIRE SPRINKLERS REQUIRED” and the proposed fire sprinklers shall be listed as a deferred submittal.

91. New buildings located in any adopted Fire Hazard Severity Zone, or any or any Wildland-Urban Interface (WUI) Fire Area designated by the enforcing agency constructed after the application date shall comply with the provisions of R337/7A.

92. These provisions shall also apply to all structures located within 100 feet of a Fuel Modification Zone, Vegetation Management Area, or similar area containing hazardous combustible vegetation, regardless of whether the property is currently located in an adopted Fire Hazard Severity Zone or Wildland-Urban Interface Area, when materials and/or construction methods for exterior wildfire exposure were previously required at the property by the Building or Fire Code Official.

93. Applicant shall satisfy all requirements of the Orange County Fire Authority (OCFA) prior to issuance of building permits and final inspection. Contact Orange County Fire Authority at (714) 573-6100 for requirements. Fire Sprinkler installations requirements are part of this requirement.

94. Applicant shall satisfy all conditions of approval and any other department or agency requirements prior to the building permit’s final inspection.

Plng. 95. Developer is responsible for the prewiring of all dwelling units with commercial CATV grade coaxial cable.

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96. Developer shall provide the CATV operator access and cooperation for the purpose of laying cable and connecting the CATV system for the purpose of complying with the service requirements of the franchise agreement.

97. Prior to the issuance of a building permit, a copy of Covenants, Conditions, and Restrictions (CC&R’s) and Articles of Incorporation of the Homeowners’ Association shall be submitted for review and approval by the City Attorney, City Engineer and Community Development Director prior to recordation. Copies of the final CC&R’s and the final map shall be placed on file with the Community Development Director.

98. Pad elevations on the final grading plan cannot deviate more than ± one foot (± 1’) from the grades shown on the Tentative Map as approved by the Planning Commission. Any grade changes greater than the ± 1-foot shall necessitate the grading plan being submitted for the review and approval of the Community Development Director to determine consistency with the Tentative tract map approval prior to the issuance of the grading permit.

99. Street names, if applicable, shall be approved by the Community Development Director prior to recordation of the final tract map.

Suggested street names and alternatives shall be submitted in writing to the Community Development Director for approval. Phonic similarity with existing street names should be avoided.
100. Air conditioner condenser pads shall be shown on the plot plan, and shall maintain Zoning Code separation requirements from an adjacent dwelling.
101. All roof appurtenances and mechanical equipment, including but not limited to HVAC units, shall be screened from public view and sound buffered from adjacent properties to the satisfaction of the Community Development Director and Building Official.
102. No equipment shall be located on the sloped, externally visible portion of the roof of the structure.
103. Parking lot/Street lighting shall consist of downward directed “shoebox” style fixtures, a maximum of 20 feet in height. Lighting shall be directed away from all property lines, adjacent streets and residences and shown in detail on the site and landscape plans. On-site illumination intensity shall not exceed 0.2 footcandles at any neighboring property line. Location, fixture design and shielding details shall be submitted for review and approval by the Community Development Director prior to installation.

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104. All signs shall be in conformance with Chapter 18.24 (Signs) of the Yorba Linda Zoning Code.
105. All standards and restrictions contained within the Yorba Linda “Guidelines and Specifications for Landscape Development” shall be reflected in landscape plans to the satisfaction of the City Landscape Architect.
106. Final species, location, size, and planting details of all project site trees shall be approved by the City Landscape Architect.
107. Decorative masonry walls and/or fencing shall be installed along the tract perimeter. Publicly viewed perimeter walls will be required to include vine plantings to break up the masses of masonry walls. Exact location and design shall be submitted for review and approval by the Planning Division prior to issuance of a building permit. 108. The entire project shall be annexed into the appropriate zones within the Yorba Linda Street Lighting and Landscape Maintenance Assessment District to pay fair share costs of operating and maintaining street lighting and landscaping to the satisfaction of the City Engineer.

The District shall be formed prior to issuance of building permits.

Boundaries of maintenance responsibility shall be shown on the landscape architectural plans
109. All common landscape along the northerly project boundaries shall be constantly maintained in a healthy, thriving condition by the homeowner’s association for the project as to adequately screen and protect the privacy of the adjacent homeowners.
110. The applicant shall provide landscape architecture plans prepared by a California-licensed landscape architect including where applicable:
a. Landscape development of all street median islands;
b. Proposed and required fencing or walls;
c. Permanent irrigation system;
d. Landscape planting and irrigation shall occur on all slopes in excess of seven feet (7’) high and 5:1 or steeper;
e. Natural areas where the Orange County Fire Authority recommends a fuel modification program;
f. Open space lots;
g. Screening around oil wells;
h. Ground mounted lighting fixtures;
i. Facilities for the handicapped including ramps, logos and signs; j. Existing trees;

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k. Parking lot details including wheel stops, sidewalk details, signing and striping;
l. Drainage details;
m. Electrical transformers;
n. Trash enclosures;
o. Details of public recreational/equestrian trails;
p. Details of private trails;
q. Areas to be maintained by Landscape Maintenance
Assessment District, homeowner’s association, and private property owners;
r. Model home/sales complex;
s. Ground-mounted mechanical equipment;
t. Oil wells (active or abandoned);
u. Playground equipment details conforming to the Consumer Products Safety Commission.
111. Final landscape architecture plans, subject to all applicable plan check fees, shall be submitted to the Engineering and Planning Divisions, as applicable, for review and approval by the City Landscape Architect per the standard plan check process prior to installation of exterior hardscape, landscape planting, and/or irrigation. All landscape architecture shall be installed prior to final occupancy and release of permits for each phase of the project.
112. The developer shall have the following items on permanent and prominent display in the sales office where applicable:
a. A copy of the approved and recorded tract map;
b. A copy of the approved Design Review plot plans;
c. A copy of the approved landscape architecture plans; d. A copy of the approved residential parking plan;
e. A current Yorba Linda General Plan land use map;
f. A current Yorba Linda Zoning Map;
g. A noise display board including the site plan and noise study h. A map showing private and public equestrian trails;
i. A map showing the boundaries of those area to be maintained by the Landscape Maintenance Assessment District;
j. A statement regarding estimated partial first tax year and full second year tax levies attributable to special bond issue taxes levied by the Yorba Linda Water District;
k. A statement regarding estimated partial first tax year and full second year tax levies attributable to the Landscape
Maintenance Assessment District;
l. Fuel modification program maps;
m. Seismic fault zone information and map describing known fault data;

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n. A statement regarding special fire protection areas due to wildland exposure;
o. Applicable Codes, Covenants and Restrictions (CC&R’s); p. Copies (blank) of statements or other disclosures required to be endorsed by the purchaser of a lot or home within tract as required by the City of Yorba Linda;
q. A statement regarding limitation of vehicular access rights due to dedications to the City;
r. A statement regarding the requirement to construct landscape planting and irrigation and permanently maintain landscape development in the required front yard setback area; and, s. A statement regarding current Zoning Ordinance limitations on parking of vehicles in front yard area;
t. A statement advising homeowners to contact the Yorba Linda Community Development Department prior to any additional on-site construction, i.e., pools, patios, fences, retaining walls, storage or utility structures, air conditioning or solar installations, etc.
u. A map of all existing and abandoned oil wells on and within 500 feet of the project site; and,
113. If applicable, the developer is required to provide to the Planning Division upon sale and transfer the following signed statement by the purchasers of properties located within a Landscape Maintenance Assessment District:
“In purchasing property described as [insert lot and tract number], on [insert date], I/we understand that said lot is located within the boundaries of a Landscape
Maintenance Assessment District and that an annual
landscape maintenance charge will be levied.

Signed: [Purchaser]
Name:”
114. If applicable, the developer is required to provide to the Planning Division upon sale and transfer the following signed statement by the purchasers of properties within 50 feet of an abandoned oil well:
“In purchasing property described as [insert lot and tract number], on [insert date], I/we understand that said lot contains or is located within 50 feet of an abandoned oil well and that no permanent wall or structure may be
constructed within a 10-foot radius of the extended shaft line of said well.

Signed: [Purchaser]
Name:”

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115. The developer shall confirm compliance with disclosure-related conditions of approval in writing to the Community Development Director prior to opening of the sales office.
116. Developer is encouraged to offer a hot water recirculating system in all new residential subdivisions as an option to any buyer purchasing a home prior to construction.
117. Mailboxes shall be designed, installed and located by the developer to the satisfaction of the Community Development Director. 118. The cover sheet of the building construction drawings shall include a blue line print of the City’s conditions of approval and shall be attached to each set of plans submitted for City approval.
119. Pre-cast fireplaces shall not be allowed on exterior walls. 120. Approval of this request shall not excuse compliance with all other applicable City ordinances and development standards in effect at this time.
121. Any approved technical drawings and/or specifications that will be changed, altered, or in any other way affected as a result of the Planning Commission approval of this project shall be revised and resubmitted for review and approval by the applicable City department. 122. The applicant shall agree and consent in writing within 60 days to the conditions of approval as adopted by the Planning Commission. 123. Development shall occur substantially as shown on the plans approved by the Planning Commission and on file in the Community Development Department.
124. The approval of Tentative Tract Map 19389 is granted for two (2) years from the date of approval by the Planning Commission, and shall become null and void upon expiration of said two year period, unless building permits have been issued or a time extension is requested in writing prior to that date.

Special Conditions:

Plng. 125. Tentative Tract Map 19389 is for a 62-unit townhome residential community, with associated recreational facilities, parking stalls and open space amenities. Any modification to the Tentative map and/or proposed onsite improvements shall require subsequent approval of a

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revised Tentative Map as determined by the Community Development Director.
126. Approval of Tentative Tract Map 19389 is contingent upon concurrent approval of Design Review 2025-02 and Conditional Use Permit 2025-

10. Failure to approve Design Review 2025-02 and Conditional Use Permit 2025-10 shall render any approval of Tentative Tract Map 19389 null and void.
127. Commitment to Negotiate and Enter Into Affordable Housing Agreement. Based on the applicant’s negotiations with city staff, the applicant has voluntarily committed to provide 3 units (5%) for use, ownership, and occupancy by “persons and families of very-low income” as defined by Health and Safety Code section 50093 for a term of 30 years (referred to as the “restricted units”). In furtherance of this commitment, City staff and the applicant shall negotiate in good faith and enter into an “Affordable Housing Agreement” that will provide, among other relevant provisions, recordable restrictive covenants (such as a regulatory agreement or use covenant, and referred to as the “restrictive covenants”) for no less than restricted units to ensure that their use and occupancy is restricted to persons and families of very-low income as defined by Health and Safety Code section 50093 for a term of 55 years. Prior to the issuance of any grading and/or building permits: (i) the applicant shall identify, and the Director of Community Development, in his or her reasonable discretion, shall have approved, the location of the restricted units in the project, (ii) the applicant shall have obtained from the City Council the approval of the Affordable Housing Agreement, according to terms approved by the Director of Community Development and in a form approved by the City Attorney’s Office, and (iii) the applicant shall have recorded in the Official Records for Orange County, California, the restrictive covenants against the restricted units, according to terms approved by the Director of Community Development and in a form approved by the City Attorney’s Office.
128. The private street entry/exist shall be constructed of decorative stamped concrete or decorative pavers as represented within the landscape plan, to the satisfaction of the Community Development Director.
129. The gating of access to the proposed project is not granted as a part of this approval. Any future proposal to provide gated access shall require subsequent review and approval of a conditional use permit by the Planning Commission, and shall be to the satisfaction of the City Traffic Engineer and the Orange County Fire Authority.
130. The street frontage parkway along Yorba Linda Boulevard between the

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proposed development and the sidewalk shall be provided with a generous landscape treatment of trees, shrubs and groundcover to enhance the aesthetic quality of the project edge as viewed from the streetscape. Details shall be shown on the project landscape plan submitted for the review and approval of the City Landscape Architect. 131. Appropriate size of evergreen trees shall be provided within the landscape area along the perimeter of the project site, particularly to the norther project boundary, to screen views of adjacent residents toward the project site to the satisfaction of the Community Development Director and City Landscape Architect. The landscape buffer area shall be shown on the final map and within the CC&R’s to be recorded with the map.
132. All standard conditions, design features and mitigation measures described within the Addendum for Tentative Tract Map 19389 and the certified Final Program Environmental Impact Report for the Yorba Linda 2021-2029 Housing Element and Implementation Programs are incorporated herein by reference and shall apply to Tentative Tract Map 19389 to the satisfaction of the Community Development Director. 133. The applicant shall defend, indemnify, and hold harmless the City of Yorba Linda, its agents, officers and employees from any claim, action or proceeding against the City or its agents, officers or employees to attack, set aside, void or annul an approval of the subject application by the City, its legislative body, advisory agencies or administrative officers. The City will promptly notify the applicant of any such claim, action or proceeding against the City and the applicant will either undertake defense of the matter and pay the City's associated legal costs or will advance funds to pay for defense of the matter by the City Attorney.
134. The developer accepts the approval of Tentative Tract Map 19389 with the understanding that the City of Yorba Linda is opposed to the landbased financing of any and all public facilities or development fees required by the City or any other public agency. The developer therefore agrees that it shall not pursue with the City or any other public agency the creation of a community facilities district or any other land based financing for public facilities or development fees in connection with this project. The developer represents that it will inform any successor developer of developer’s understanding of the City’s prohibition and developer’s agreement not to pursue such public financing. As with all the conditions of approval contained herein, this condition shall apply to developer and its successors and assigns.
135. Applicant shall provide to the Planning Division, prior to issuance of building permits, an electronic copy of the final plans approved by the

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Planning Commission. The copy shall be provided on a USB thumb drive in “.pdf” format.
136. Construction and architectural detailing shall be in substantial conformance with the approved plans, including but not necessarily limited to elevation drawings and material/colors sample board, submitted as a part of this application and as approved by the Planning Commission, except that any modification shall be subject to the discretion of the Community Development Director upon finding that any changes are comparable in substance and quality to the original approval.
137. All tubular steel fencing within Tentative Tract Map 19389 shall be designed to prevent rust and provide the greatest degree of longevity and durability feasible to the satisfaction of the Community Development Director.
138. Any future modification to the building colors approved by the Planning Commission shall be subject to review and approval by the Community Development Director. At the Community Development Director’s discretion, proposed color modifications may be referred to the Planning Commission for design review approval.
139. Applicant shall include notification within the CC&R’s as well as within the project sales office informing potential homeowners that landscaping within H.O.A.-maintained areas is not to be modified, trimmed, or removed in any way by the homeowner, without express authorization by the H.O.A.
140. Maximum building height is dictated by Section 18.26.030 of the Yorba Linda Zoning Code which allows decorative architectural elements such as chimneys, cupolas, weathervanes, and screened mechanical units to extend up to 10 percent above the maximum building height with final discretion to the satisfaction of the Community Development Director approval.
141. The final site plan for Tentative Tract Map 19389 shall be reviewed and approved to the satisfaction of the Community Development Director prior to the issuance of building permits.
142. The project Covenants Conditions and Restrictions (CC&Rs) shall prohibit the use of dedicated covered resident parking for personal storage or any use other than for the parking of operable motor vehicles at all times to the satisfaction of the City Attorney and Community Development Director. Quarterly garage checks are to be performed by the Homeowner’s Association to ensure compliance.

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Yorba Linda City CouncilMarch 3, 2026

Yorba Linda City Council
March 3, 2026