Agenda packet — Industry City Council, February 12, 2026 (part 2 of 59)

MARICI BATTERY ENERGY STORAGE SYSTEM FACILITY INITIAL STUDY / MITIGATED

NEGATIVE DECLARATION

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TABLE OF CONTENTS
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TABLE OF CONTENTS
Environmental Checklist ........................................................................................................ 1 Project Information............................................................................................................. 1 Environmental Factors Potentially Affected........................................................................ 2 Determination..................................................................................................................... 3

1. Introduction............................................................................................................... 5

1.1 Overview ................................................................................................................. 5

1.2 California Environmental Quality Act...................................................................... 6

1.3 Initial Study ............................................................................................................. 7

1.4 Mitigated Negative Declaration .............................................................................. 7

1.5 Levels of Significance .............................................................................................. 8

2. Project Description..................................................................................................... 9

2.1 Project Location ...................................................................................................... 9

2.2 Environmental Setting............................................................................................. 9

2.3 Project Characteristics .......................................................................................... 17 Transmission.......................................................................................................... 34 Substation ............................................................................................................. 39 Communications................................................................................................... 39

2.4 Required Permits and Approvals........................................................................... 44

3. Environmental Evaluation......................................................................................... 47 I. Aesthetics....................................................................................................................... 47 II. Agriculture and Forestry Resources.............................................................................. 53 III. Air Quality .................................................................................................................... 56 IV. Biological Resources..................................................................................................... 65 V. Cultural Resources......................................................................................................... 69 VI. Energy .......................................................................................................................... 73 VII. Geology and Soils........................................................................................................ 77 VIII. Greenhouse Gas Emissions........................................................................................ 86 IX. Hazards and Hazardous Materials ............................................................................... 89 X. Hydrology and Water Quality...................................................................................... 125 XI. Land Use and Planning............................................................................................... 140 XII. Mineral Resources..................................................................................................... 142 XIII. Noise ........................................................................................................................ 143 XIV. Population and Housing........................................................................................... 158 XV. Public Services........................................................................................................... 159 XVI. Recreation................................................................................................................ 163

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XVII. Transportation ........................................................................................................ 164 XVIII. Tribal Cultural Resources....................................................................................... 170 XIX. Utilities and Service Systems ................................................................................... 174 XX. Wildfire ..................................................................................................................... 179 XXI. Mandatory Findings of Significance......................................................................... 182

4. References ..............................................................................................................185

5. List of Preparers ......................................................................................................189 Lead Agency .................................................................................................................... 189 PlaceWorks...................................................................................................................... 189 Appendices
Appendix A Air Quality and Greenhouse Gas Emissions Report Appendix B Construction Health Risk Assessment
Appendix C Biological Resources Assessment
Appendix D Geotechnical Engineering Report, Terracon, December 2023 Appendix E Revised Geotechnical Engineering Report
Appendix F Phase I ESA – 16207 and 16209 Gale Avenue
Appendix G Phase I ESA – 16233 and 16235 Gale Avenue
Appendix H Phase I ESA – 16253 and 16293 Gale Avenue
Appendix I Limited Site Investigation – 16207 and 16209 Gale Avenue Appendix J Limited Site Investigation – 16233 and 16235 Gale Avenue Appendix K Revised Soil and Groundwater Management Plan Appendix L Hazardous Materials and Safety Memorandum
Appendix M Plume Study
Appendix N EMF Study
Appendix O Emergency Air Toxics Analysis
Appendix P Hydrology Study and Stormwater Quality Management Plan Appendix Q Sound Impact Assessment
Appendix R Transportation Study

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List of Figures
Figure Page
Figure 1 Regional Location.................................................................................................. 11 Figure 2 Local Vicinity ......................................................................................................... 13 Figure 3 Aerial Photograph................................................................................................. 15 Figure 4a Proposed Site Layout ............................................................................................ 19 Figure 4b Proposed Site Layout ............................................................................................ 21 Figure 5 Electrical System Details....................................................................................... 25 Figure 6 Substation Elevations............................................................................................ 29 Figure 7 Tie-Line Pole Details.............................................................................................. 31 Figure 8 Landscaping Plan................................................................................................... 35 Figure 9 Building Elevations and Colors.............................................................................. 37 Figure 10 Proposed Drainage Area Maps........................................................................... 133 Figure 11 Noise Measurement Locations........................................................................... 149 Figure 12 Noise Generating Project Features..................................................................... 155 List of Tables
Table Page
Table 1 Maximum Daily Regional Construction Emissions................................................ 59 Table 2 Localized Construction Emissions......................................................................... 61 Table 3 Construction Risk Summary.................................................................................. 62 Table 4 Chemical Thresholds During Battery Failure ...................................................... 107 Table 5 Toxicity Level for CO ........................................................................................... 110 Table 6 Emergency Air Toxics Analysis Results – Maximum Exposed Individual Resident ............................................................................................ 114 Table 7 Phase I ESAs and LSIs Governmental Databases Summary ................................ 117 Table 8 Water Quality Protection Construction Best Management Practices................ 128 Table 9 50-year Storm Peak Flow Summary.................................................................... 138 Table 10 Los Angeles County Noise Control Ordinance Standards................................... 145 Table 11 Vibration Damage Criteria .................................................................................. 146 Table 12 Closest Noise-Sensitive Receptors...................................................................... 147

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Table 13 Project Construction Noise Level Increases........................................................ 151 Table 14 Construction Noise Levels by Construction Activity ........................................... 151 Table 15 Noise Source Inputs............................................................................................ 153 Table 16 Operational Noise Levels at Receptor Locations................................................ 154 .

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DECEMBER 2025 1

ENVIRONMENTAL CHECKLIST

PROJECT INFORMATION
Project Title: Marici Battery Energy Storage System Facility Lead Agency Name and Address:

City of Industry
15625 Mayor Dave Way
Industry, California 91744
Contact Person and Phone Number:

Eduardo Manriquez, Contract Senior Planner
Mike Poland, Contract Senior Project Manager
626.333.2211
Project Location: The project site has addresses of 16233, 16207, and 16253 Gale Avenue, located on the north side of Gale Avenue immediately north of its intersection with Hinnen Avenue. It is comprised of Assessor’s Parcel Numbers 8242-016-033, -034, -036, -044, and -061.

Project Sponsor’s Name and Address:

Marici Project LLC
11801 Domain Boulevard, Suite 450
Austin, TX 78758
General Plan Designation: Employment
Zoning: Industrial
Description of Project: The proposed project includes redevelopment of the 9.2-acre project site and minor improvements to SCE Walnut Substation that abuts the project site. The proposed project includes the construction and operation of an approximately 400-megawatt battery energy storage system (BESS) facility and associated site and infrastructure improvements on the project site. Development of the BESS facility requires demolition of all existing buildings, structures, hardscapes, and minimal landscaping on-site. The minor improvements to the SCE Walnut Substation will help interconnect and transfer power between the proposed BESS facility and SCE Walnut Substation. At the end of the proposed project’s operational term, which is

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anticipated to be 35 years, the project applicant may determine that the BESS facility could be decommissioned and deconstructed, or it may seek an extension of its use permit.

Surrounding Land Uses and Setting: The project site is bound by Gale Avenue and residential uses to the south, Ward Way and warehouses and commercial properties to the west, Union Pacific Railroad/Metro rail lines and a rail yard to the north, and the Southern California Edison Walnut Substation to the east.

Other Public Agencies Whose Approval Is Required (e.g., Permits, Financing Approval, or Participating Agreement):

Los Angeles County Fire Department
Southern California Edison
Have California Native American tribes traditionally and culturally affiliated with the project area requested consultation pursuant to Public Resources Code Section 21080.3.1? If so, is there a plan for consultation that includes, for example, the determination of significance of impacts to tribal cultural resources, procedures regarding confidentiality, etc.? The City of Industry prepared letters addressed to each Native American Tribe provided on the City’s list of tribes to be contacted for tribal consultation. Outreach letters were sent to tribal representatives initiating consultation with tribes pursuant to Assembly Bill (AB) 52.

ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED
The environmental factors checked below would be potentially affected by this project, involving at least one impact that is a “Potentially Significant Impact,” as indicated by the checklist on the following pages.

Aesthetics Agriculture / Forestry
Resources
Air Quality
Biological Resources Cultural Resources Energy
Geology / Soils Greenhouse Gas
Emissions
Hazards and Hazardous
Materials
Hydrology / Water
Quality
Land Use / Planning Mineral Resources
Noise Population / Housing Public Services
Recreation Transportation Tribal Cultural Resources
Utilities / Service Systems Wildfire Mandatory Findings of Significance

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DETERMINATION
On the basis of this initial evaluation:

I find that the proposed project COULD NOT have a significant effect on the environment, and a NEGATIVE DECLARATION will be prepared.

I find that although the proposed project could have a significant effect on the environment, there will not be a significant effect in this case because revisions in the project have been made by or agreed to by the project proponent. A MITIGATED NEGATIVE DECLARATION will be prepared.

I find that the proposed project MAY have a significant effect on the environment, and an ENVIRONMENTAL IMPACT REPORT is required.

I find that the proposed project MAY have a "potentially significant impact" or "potentially significant unless mitigated" impact on the environment, but at least one effect 1) has been adequately analyzed in an earlier document pursuant to applicable legal standards, and 2) has been addressed by mitigation measures based on the earlier analysis as described on attached sheets. An ENVIRONMENTAL IMPACT REPORT is required, but it must analyze only the effects that remain to be addressed.

I find that although the proposed project could have a significant effect on the environment, because all potentially significant effects (a) have been analyzed adequately in an earlier EIR or NEGATIVE DECLARATION pursuant to applicable standards, and (b) have been avoided or mitigated pursuant to that earlier EIR or NEGATIVE DECLARATION, including revisions or mitigation measures that are imposed upon the proposed project, nothing further is required.

Signature Date

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DECEMBER 2025 5

1. INTRODUCTION

1.1 OVERVIEW
The proposed project includes redevelopment of the 9.2-acre site and minor improvements to SCE Walnut Substation that abuts the project site. The proposed project includes the construction and operation of an approximately 400-megawatt battery energy storage system (BESS) facility and associated site and infrastructure improvements. Development of the BESS facility requires demolition of all existing buildings, structures, hardscapes, and minimal landscaping on-site. The minor improvements to the SCE Walnut Substation will help interconnect and transfer power between the proposed BESS facility and SCE Walnut Substation.

The proposed project is an electric energy storage facility that will utilize lithium-ion batteries and ancillary equipment to store energy received from the regional electric grid to then be returned to the grid when needed. Battery energy storage is a key component of federal, state and local planning to strengthen electric grid reliability, and reduce the emission of greenhouse gasses. The proposed project will help to accomplish these goals by providing capacity to store energy when there is excess generation capacity such as from intermittent renewable sources like wind and sunlight, and then allowing that energy to be used when needed thereby reducing dependence on fossil fuel generation sources.

Project battery modules will be housed in purpose-built enclosures. Inverters and transformers will convert between low-voltage direct current (DC) conveyed in and out of the batteries and the regional electric grid's high-voltage alternating current (AC). The rapid response batteries can be utilized to stabilize rapid changes in electric power demand, which reinforces grid stability. The proposed project will include an onsite substation and an overhead 220 kV electric line across the eastern site boundary into the adjacent Southern California Edison (SCE) Walnut Substation.

Additional ancillary features include auxiliary equipment pads with transformers and control equipment, paved access and fire lane, fire hydrant system, stormwater drainage controls, a 10- foot-high perimeter wall designed to City and fire department requirements, landscaping, and a storage building and containers for spare parts and equipment.

Development of the BESS facility requires demolition of all existing buildings, structures, hardscapes, and minimal landscaping on-site. Also, SCE identified a need for various modifications and improvements to the Walnut Substation to accommodate and support the proposed project’s interconnection. Project development requires City adoption of a Mitigated Negative Declaration and Mitigation Monitoring and Reporting Program, approval of a Zone Code text amendment (Zone Amendment No. 24-07) to allow the use with a CUP, approval of a Conditional Use Permit

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(CUP No. 24-03), approval of Development Plan Application – Long Form Development Plan No. 24-09 (DP-24-09), approval of a Community Benefit Agreement (CBA No. 25-01), and approval of a ROW Agreement (street improvement permit) and Easement Agreement (encroachment permit).

In compliance with the California Environmental Quality Act (CEQA), the City of Industry (City), as lead agency, is preparing the environmental documentation for the proposed project to determine whether approval of the requested discretionary actions and subsequent development would have a significant impact on the environment. As defined by Section 15063 of the CEQA Guidelines, an Initial Study is prepared primarily to provide the lead agency with the information to use as the basis for determining whether an environmental impact report (EIR), negative declaration, or mitigated negative declaration (MND) would provide the necessary environmental documentation and clearance for the proposed project.

1.2 CALIFORNIA ENVIRONMENTAL QUALITY ACT
The environmental compliance process is governed by the California Environmental Quality Act (CEQA) and the CEQA Guidelines (Public Resources Code [PRC], Section 21000 et seq.; California Code of Regulations [CCR], Title 14, Sections 15000 et seq.). CEQA was enacted in 1970 by the California Legislature to disclose to decision-makers and the public the significant environmental effects of projects and to identify ways to avoid or reduce the environmental effects through feasible alternatives or mitigation measures. Compliance with CEQA applies to California government agencies at all levels: local, regional, and State agencies, boards, commissions, and special districts (such as school districts and water districts). The City of Industry (“City”) is the lead agency for the proposed project and is therefore required to conduct an environmental review to analyze the potential environmental effects associated with the proposed project.

PRC Section 21080(a) states that analysis of a project’s environmental impact is required for any “discretionary projects proposed to be carried out or approved by public agencies…”. In this case, the City has determined that an Initial Study is required to determine whether there is substantial evidence that construction and operation of the proposed project would result in environmental impacts.

A “project” means the whole of an action that has a potential for resulting in either a direct physical change in the environment, or a reasonably foreseeable indirect physical change in the environment, and that is any of the following:
 An activity directly undertaken by any public agency including but not limited to public works construction and related activities clearing or grading of land, improvements to existing public structures, enactment and amendment of zoning ordinances, and the adoption and

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amendment of local General Plans or elements thereof pursuant to Government Code sections 65100 to 65700.
 An activity undertaken by a person which is supported in whole or in part through public agency contacts, grants, subsidies, loans, or other forms of assistance from one or more public agencies.
 An activity involving the issuance to a person of a lease, permit, license, certificate, or other entitlement for use by one or more public agencies. (14 CCR Section 15378[a]).

The proposed discretionary actions by the project applicant constitute a “project” because the activity has the potential to result in a direct physical change in the environment and requires issuance of discretionary land use entitlements by the City. All “projects” in the State of California are required to undergo an environmental review to determine the environmental impacts associated with implementation of the project.

1.3 INITIAL STUDY
The purpose of the Initial Study is to: 1) provide the lead agency with information to use as the basis for deciding the proper type of CEQA document to prepare; 2) enable the lead agency to modify a project, mitigating adverse impacts before an Environmental Impact Report (EIR) is prepared, thereby enabling the project to qualify for a negative declaration; 3) assist in the preparation of an EIR, if one is required; 4) facilitate environmental assessment early in the design of a project; 5) provide documentation of the factual basis for the findings in a Mitigated Negative Declaration (MND) or Negative Declaration (ND); 6) eliminate unnecessary EIRs; and 7) determine if a project is covered under a previously prepared EIR. When an Initial Study identifies the potential for immitigable significant environmental impacts, the lead agency must prepare an EIR (14 CCR section 15064); however, if all impacts are found to be less than significant or can be mitigated to a less-than-significant level, the lead agency can prepare an ND, or MND that incorporates mitigation measures into the project (14 CCR section 15070).

1.4 MITIGATED NEGATIVE DECLARATION
The MND includes information necessary for agencies to meet statutory responsibilities related to the proposed project. State and local agencies will use the MND when considering any permit or other approvals necessary to implement the project. A list of the environmental topics that have been identified for study in the MND is provided in the Environmental Checklist.

One of the primary objectives of CEQA is to enhance public participation in the planning process; public involvement is an essential feature of CEQA. Community members are encouraged to participate in the environmental review process, request to be notified, monitor newspapers for

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formal announcements, and submit substantive comments at every possible opportunity afforded by the lead agency. The environmental review process provides several opportunities for the public to participate through public notice and public review of CEQA documents and at public meetings.

1.5 LEVELS OF SIGNIFICANCE
The following terminology is used to describe the level of significance of impacts. Although the criteria for determining significance are different for each topic area, the environmental analysis applies a uniform classification of the impacts based on definitions consistent with CEQA and the CEQA Guidelines:
 No impact. The project would result in no adverse effect on the environment.  Less than significant. The project would not exceed the established significance criteria.  Less than significant with mitigation incorporated. The project would exceed the established significance criteria without mitigation measures, but one or more mitigation measures would reduce the impact to a less-than-significant level successfully.  Potentially significant. The project would exceed the established significance criteria, and either no feasible mitigation measures are available to reduce the impact to a less-thansignificant level, or more analysis is needed to determine if feasible mitigation measures are available to reduce the impact to a less-than-significant level. If any impact is identified as potentially significant, an EIR is required.

Mitigation Measures. If, after incorporation and implementation of federal, state, and local regulations, there are still significant environmental impacts, then feasible and project-specific mitigation measures are required to reduce impacts to less-than-significant levels. Mitigation measures must further reduce significant environmental impacts above and beyond compliance with federal, State, and local laws and regulations. Mitigation under CEQA Guidelines Section 15370 includes:
 Avoiding the impact altogether by not taking a certain action or parts of an action.  Minimizing impacts by limiting the degree or magnitude of the action and its implementation.  Rectifying the impact by repairing, rehabilitating, or restoring the impacted environment.  Reducing or eliminating the impact over time by preservation and maintenance operations during the life of the action.
 Compensating for the impact by replacing or providing substitute resources or environments.

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DECEMBER 2025 9

2. PROJECT DESCRIPTION

2.1 PROJECT LOCATION

2.1.1 Regional Setting
The 9.2-acre project site (Project Site) is at the western end of the City of Industry, in the southeastern part of Los Angeles County. Industry is bordered by the cities of Diamond Bar, Walnut, Pomona, West Covina, La Puente, Baldwin Park, and El Monte and the unincorporated Los Angeles County communities of Rowland Heights and Hacienda Heights (see Figure 1, Regional Location). The Project Site lies in a lowland area in the eastern San Gabriel Valley with Puente Hills to the south. Regional access to the Project Site is from State Route 60 via the Gale Avenue and Hacienda Boulevard freeway ramp approximately 0.75 miles to the southwest.

2.1.2 Local Setting
As shown in Figures 2, Local Vicinity, and 3, Aerial Photograph, the Project Site is bounded by Gale Avenue and residential uses to the south, Ward Way and warehouses and commercial properties to the west, Union Pacific Railroad (UPRR)/Metro rail lines and a rail yard to the north, and the Southern California Edison (SCE) Walnut Substation to the east. The Project Site has addresses of 16233, 16207, and 16253 Gale Avenue and is located on the north side of Gale Avenue north of its intersection with Hinnen Avenue; it consists of five contiguous legal parcels (Assessor’s Parcel Numbers 8242-016-033, -034, -036, -044, and -061). Local access to the Project Site is provided via Stimson Avenue and Gale Avenue.

2.2 ENVIRONMENTAL SETTING

2.2.1 Existing Land Use
The Project Site is currently developed with warehouse, manufacturing, and industrial uses totaling 161,781 square feet of building space, and approximately 205,000 square feet of asphalt and concrete surfacing. Other site features include surface parking areas; outdoor storage and loading/unloading areas; driveways that connect to the internal parking and circulation improvements; and various hardscape and landscape improvements. The Project Site is currently secured on all sides by a mix of tubular-steel fencing, chain-link fencing, solid block walls, and landscaping. Wooden power poles with electrical lines run along a portion of the western/central

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portions of the Project Site. The Project Site is almost entirely covered by impervious surfaces (pavement, buildings, and loading docks). The total existing impervious cover is 8.43 acres, which makes up approximately 92 percent of the total Project Site. Vehicular access to the Project Site is currently provided via three driveways from Gale Avenue.

An SCE overhead electric distribution line currently passes through the eastern portion of the site in a generally north-south direction. A segment of another SCE overhead distribution line is in the western portion of the site.

2.2.2 Existing Zoning and General Plan
The regulatory plans that govern development and use of the Project Site are the Industry General Plan and Municipal Code (including Title 17, Zoning). The development and design standards and regulations in Title 17 implement the City’s General Plan and constitute the zoning regulations that govern development of the Project Site. Per the City’s General Plan land use map, the Project Site’s land use designation is Employment. Per the City’s zoning map, the Project Site is zoned Industrial. Allowed uses under the Employment and Industrial designations include a variety of business and employment uses, including industrial, assembly, printing, machining, milling, welding, research and development, distribution, warehousing, storage, and support office uses.

Currently, the proposed battery energy storage system is not listed as a “Permitted Use” in the City’s Industrial Zone.

2.2.3 Surrounding Land Use
The Project Site is surrounded by a mix of uses, including industrial and warehouse uses to the north and west, the SCE Walnut Substation to the east, and residential uses to the south beyond Gale Avenue in the unincorporated Los Angeles County community of Hacienda Heights. The Project Site and adjacent properties within the City’s boundaries are zoned Industrial (M), with the exception of the SCE Walnut Substation, which is zoned Institutional. The Project Site and surrounding area are urban, disturbed, and developed. The closest sensitive receptors are the residential uses to the south in Hacienda Heights. The closest surface water is the concrete-lined San Jose Creek Channel, about 400 feet north of the Project Site. Figure 3 depicts the surrounding land uses.

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MARICI BATTERY ENERGY STORAGE FACILITY
Hawaiian Hawaiian
Gardens Gardens
Lakewood Lakewood
Artesia Artesia
Long Beach Long Beach
Diamond Bar Diamond Bar
La Puente La Puente Walnut
South El South El
Monte
Covina
West Covina West Covina
El Monte El Monte
Pomona
La Mirada La Mirada
La Habra La Habra
Heights Heights
Bellflower Bellflower
Norwalk Norwalk
Santa Fe Santa Fe
Springs Springs
Commerce Commerce
Pico Rivera Pico Rivera
Rosemead Rosemead
Alhambrara
Temple City Temple City
South
Pasadena asadena
Irwindale Irwindale
Bradbury Bradbury
La
Verne
Azusa
Sierra Madre Sierra Madre
Arcadia Arcadia
Glendora Glendora
Monrovia Monrovia
Duarte
San Dimas San Dimas
Pasadena Pasadena
Baldwin Park Baldwin Park
BBell Gardens ell Gardens
Cypress Cypress
Placentia Placentia
Anaheim
Fullerton Fullerton
La Habra La Habra
Orange
Brea
Buena Park Buena Park
Villa Park Villa Park
Yorba Linda Yorba Linda
La
Palma
0 3
Scale (Miles) Source: ESRI, 2022
Figure XX - Figure Title Here

1. Introduction

PROJECT NAME HERE

CITY OF PROJECT HERE
0 Scale (Miles)
3 Source: Generated using ArcMap 2025. Figure 1
Regional Location
County Boundary
City of Industry Boundary
Project Site
County of Los Angeles
County of Orange
County of
San Bernardino
60 CALIFORNIA
60 CALIFORNIA
60 CALIFORNIA City of Industry
10 210
10 57

CALIFORNIA
57 CALIFORNIA
5 605
605
5 91

CALIFORNIA
91 CALIFORNIA
Chino
Hills
105
210

CALIFORNIA
Hacienda Heights
City of Industry Rowland Heights

CITY OF INDUSTRY

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0 Scale (Feet)
2,000
Source: Generated using ArcMap 2025. Figure 2
Local Vicinity
Project Site Boundary
60 CALIFORNIA
60 CALIFORNIA
60 CALIFORNIA
Hacienda
Heights
San Jose Creek
City of Industry Boundary
Industry
Phoenix Dr
Ward
Wy
Substation Area Boundary

CITY OF INDUSTRY

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0 Scale (Feet)
325
Source: Nearmap 2025. Figure 3
Aerial View
Project Site Boundary
SCE Walnut Substation
(Substation Area)
Ward Wy
UPRR/Metrolink
San Jose Creek
City of
Industry
Phoenix Dr
S Stimson Ave
Los Angeles County
Fire Department Station #43
Gale Ave
Folger St
Glenelder Ave
Shadybend Dr
Barford Ave Barford Ave
Denley St
Hinnen Ave
Hacienda
Heights
Residential
Residential
Industrial and Commercial
City of Industry Boundary Substation Area Boundary

CITY OF INDUSTRY

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2.3 PROJECT CHARACTERISTICS

2.3.1 Project Overview
The proposed project would provide the State of California with a reliable battery energy storage system (BESS) that would receive, store, and discharge electricity from the California Independent System Operator (CAISO) controlled electric grid, including renewable energy produced by existing solar and wind resources in the region.

Battery energy storage is a key component of federal, state, and local planning to strengthen electric grid reliability and reduce the emission of greenhouse gases. The proposed project will help to accomplish these goals by providing capacity to store energy when there is excess generation capacity, such as from intermittent renewable sources like wind and sunlight, then allowing that energy to be used when needed, thereby reducing dependence on fossil fuel generation sources. The rapid response batteries can be utilized to stabilize changes in electric power demand, which reinforces grid stability. The need for facilities such as the proposed project is immediate—on July 30, 2021, Governor Newsom declared a State of Emergency in California regarding statewide electricity shortages caused by climate change, drought, and wildfires. The Governor called upon agencies across the State to take actions to expedite approval of BESSs to bring capacity online in 2022 and beyond. Construction and operation of the proposed project will accomplish the following.
 Use a proven and established energy storage technology that is efficient, has low maintenance requirements, and is recyclable.
 Assist California in meeting its greenhouse gas emissions reduction goals by 2020 and 2030 as required by the California Global Warming Solutions Act (Assembly Bill 32) and amended by Senate Bill 32 in 2016.
 Assist California in achieving its transition from fossil-fuel use by allowing renewables to be stored and discharged back to the market when necessary.

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2.3.2 Proposed Land Use and On-Site Improvements
The proposed Marici BESS facility (proposed Project) includes the construction and operation of an approximately 400-megawatt BESS facility and associated site and infrastructure improvements on the Project Site. Project implementation requires demolition of all existing buildings, structures, hardscapes, and landscaping on-site. Figures 4a and b, Proposed Site Layout, illustrate the layout of the proposed BESS facility and associated improvements and equipment.

As shown in Figure 4a, the southeastern portion of the Project Site would be developed with the on-site collector substation, which is further illustrated in Figure 4b.

The proposed Project would provide a service to the regional electric grid by receiving energy (charging) from the SCE electric transmission system, storing energy on-site, then delivering energy (discharging) back to the SCE Walnut Substation (Substation Area). The proposed BESS facility would generate a total electricity demand of 584,000 kilowatt-hours per year. Power captured or released by the proposed Project would be transferred to and from the Substation Area, which is at 16398 Gale Avenue in the City of Industry (bordering the site to the east), via an overhead tie-line. Project implementation would require several improvements to the Substation Area, which are described below.

Project approval requires City adoption of a Mitigated Negative Declaration and Mitigation Monitoring and Reporting Program, approval of a Zone Code text amendment (Zone Amendment No. 24-07) to allow the use with a CUP, approval of a Conditional Use Permit (CUP No. 24-03), approval of Development Plan Application – Long Form (Development Plan No. 24-09 (DP-24-09), approval of a Community Benefit Agreement (CBA No. 25-01) , approval of a ROW Agreement (street improvement permit), and Easement Agreement (encroachment permit).

The Industrial zoning designation of the Project Site does not permit the development and operation of BESS facilities. Development of the proposed BESS facility on the Project Site does not include or require a change in the zoning designation of the Project Site (e.g., through an amendment to the site’s zoning designation from one zone to another); however, a zone text amendment to list BESS facilities as a use permitted through City approval of a CUP in the Industrial zone is required.

Following is a description of the various components and improvements, both on- and off-site, associated with and needed to implement the proposed Project.

Page 195 of 6633 ends

PlaceWorks

MARICI BATTERY ENERGY STORAGE FACILITY

OE OE OE OE OE OE OE OE

UE UE UE UE UE UE UE UE

UE UE UE UE UE UE UE UE COMM COMM
GAS
COMM

COMM COMM COMM

F F F F F F F
F F F

F F F F F F F F
F

F F F F F

F F F F

UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE

UE UE UE UE UE UE UE UE UE UE
UE

F F F F F F F
F F F

F F F F F F F F
F

F F F F F

F F F F

UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE

UE UE UE UE UE UE UE UE UE UE
UE
ST
ST

ST ST ST ST ST ST ST ST ST
ST ST

ST ST ST ST ST ST ST ST ST ST ST ST ST ST ST

ST ST ST ST ST ST ST
ST

ST ST ST ST ST
SD
SD
SD

HINNEN AVE

WARD WAY

GALE AVENUE

UNION PACIFIC RAILWAY
PROP 10' SCE ELECTRIC

UTILITY EASEMENT
PROP 30' SETBACK

FROM EX BACK OF CURB
PROP 30' SETBACK FROM

EX CURB LINE
3' (MIN )
5'
7'
10'
19'
10'

PROP LANDSCAPE AREA (TYP)

PROP VEHICULAR ACCESS GATE
(SEE NOTE 9)
PROP 10' HIGH BLAST RATED

CMU WALL W/SECURITY WIRE
(SEE NOTE 8)

PROP TRANSFORMER (TYP)

PROP CURB INLET (TYP)

PROP FIRE WATER LINE (TYP)

PROP FIRE HYDRANT
(TYP, SEE NOTE 5)

PROP BATTERY CONTAINER (TYP) PROP STORM DRAIN

MANHOLE (TYP)

SAWCUT EXISTING CURB AND
CONNECT PROP 26' WIDE DRIVEWAY

ENTRANCE TO EX PAVEMENT

PROP GRATE INLET (TYP)

PROPOSED UNDERGROUND TO

OVERHEAD TRANSITION POLE/END

PROP UNDER GROUND ELECTRIC
PROP 10' HIGH BLAST RATED

CMU WALL W/SECURITY WIRE
(SEE NOTE 8)
PROP 10' HIGH

CMU FIRE WALL
PROP 10' HIGH BLAST RATED

CMU WALL W/SECURITY WIRE
(SEE NOTE 8)
PROP 20'X60' O&M BUILDING

PROP CMU TRASH AND

RECYCLING ENCLOSURE
9'(L) X 22'(W) X 6'(H)
7'
10'
PROP 10' HIGH BLAST RATED

CMU WALL W/SECURITY WIRE
(SEE NOTE 8)
APPROX. 80' ROW
25'

EXISTING RETAINING WALL SHALL BE MOVED

TO PROPERTY LINE

PROP PRETREATMENT DEVICE

PROP BOLLARD (TYP)

PROP FIRE COMMAND
CENTER (2'x3')
PROP 20' HIGH POLE

FOR WINDSOCK
PROP FIRE COMMAND CENTER (2'x3')
PROP 20' HIGH POLE

FOR WINDSOCK
5' (TYP) 5' (TYP)
11' (TYP)
4' (TYP)
5' (TYP) 5' (TYP)
11' (TYP) 4' (TYP)
5' (TYP) 5' (TYP)
11' (TYP)
4' (TYP)
11' (TYP)
8' (TYP) 6' (TYP)
5' (TYP)
6' (TYP)
5' (TYP)
8' (TYP)
11' (TYP)

EX ROAD ℄
8'
11'
PROP 2-10'X20' PARKING SPACES
PROP 1-10'X20' ADA PARKING SPACE
W/ 5'X20' ACCESS AISLE

EX ROAD ℄

SAWCUT EXISTING CURB AND
CONNECT PROP 26' WIDE DRIVEWAY

ENTRANCE TO EX PAVEMENT

PROP PEDESTRIAN ACCESS GATE (TYP)

PROP VEHICULAR ACCESS GATE
(SEE NOTE 9)

PROP AUXILIARY PAD (TYP)
30'
14'
3'
20'
13'
PROP 2-10'X20' PARKING SPACES
26' BOC-BOC PRIVATE

DRIVEWAY AND FIRE LANE
(SEE DETAILS SHEET C-6.0)
26' BOC-BOC PRIVATE

DRIVEWAY AND FIRE LANE
(SEE DETAILS SHEET C-6.0)

SAWCUT EXISTING CURB AND
CONNECT PROP 26' WIDE DRIVEWAY

ENTRANCE TO EX PAVEMENT
26' BOC-BOC PRIVATE

DRIVEWAY AND FIRE LANE
(SEE DETAILS SHEET C-6.0

PROP STORAGE CONTAINER (TYP)
PROP 6'(W) X 46' (L) ADA ACCESSIBLE WALKWAY

EX SCE VAULT (TO REMAIN)

EX UTILITY

BOX TYP (TO

REMAIN)

EX STREET TREE TYP (TO REMAIN)

SIDEWALK, CURB AND GUTTER

TO BE REPAIRED AT REMOVED

DRIVEWAY LOCATION

EX LANDSCAPE AREA TYP
(TO REMAIN)

CURB REPAIRED AT

REMOVED DRIVEWAY

LOCATION (TYP)

HEAT PUMP

ASSESSORS PARCEL NUMBER
8242-016-814
(QUASI-PUBLIC: SCE WALNUT SUBSTATION,

NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-059
(INDUSTRIAL: WHOLESALE WAREHOUSE,

NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-046
(INDUSTRIAL: ELECTRICAL AND

LIGHTING WHOLESALE WAREHOUSE,

NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-043
(INDUSTRIAL: DIESEL PARTS AND

SERVICE, NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-029
(INDUSTRIAL: NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-062
(RECREATIONAL: VETERANS OF

FOREIGN WARS HALL, NOT PART OF PROJECT)

PROP SUBSTATION
(SEE SHEET C-7.0)

PROP POCO POLE

PROP RISER POLE
PROP 10' HIGH CMU FIRE WALL

PROPOSED UNDERGROUND ELECTRIC

CONNECTION LOCATION TO BE

DETERMINED BY SCE

PROP UNDERGROUND ELECTRIC
6'
1 2
40'

SIDEWALK AND

CURB AND

GUTTER REPAIR
5' (TYP)

PROP FACILITY IDENTIFICATION

SIGN (WALL MOUNT)

EX CONCRETE DRAIN
(TO REMAIN)

EX FIRE HYDRANT
(TO REMAIN)

EX FIRE HYDRANT (TO REMAIN)

EX STREET TREE TYP (TO REMAIN)

EX FIRE HYDRANT
(TO REMAIN)

PROP FACILITY IDENTIFICATION

SIGN (WALL MOUNT)

PROP FACILITY IDENTIFICATION

SIGN (WALL MOUNT)

CURB AND GUTTER REPAIRED AT

REMOVED DRIVEWAY LOCATION
30' OFFER OF DEDICATION

SUMMARY OF KEY FEATURES

PLAN DEPICTION ITEM DIMENSIONS QUANTITY
BATTERY CONTAINER 20'(L) X 8'(W) X 8'(H) 480*
MV TRANSFORMER 20'(L) X 8'(W) X 9.5'(H) 120*
STORAGE CONTAINER 40'(L) X 8'(W) X *'(H) 8
AUXILIARY PAD 20'(L) X 20'(W) 3
30'(L) X 14'(W) 2
BACKUP GENERATOR 17.6'(L) X 7.5'(W) (CONC PAD) 2
TRASH AND RECYCLING ENCLOSURE 9'(L) X 22'(W) X 6'(H) 1
RISER POLE 102'-0"(H) 1
POINT OF CHANGE IN OWNERSHIP POLE 140'-0"(H) 1

FIRE HYDRANT PER FIRE DEPARTMENT
REQUIREMENT 22
STORMWATER DROP INLET (CURB) 3' X 6', 3' X 8', AND 3' X 10' 13 STORMWATER DROP INLET (GRATE) 4' X 4' AND 3' X 3' 2
STORMWATER DRAIN MANHOLE 4' DIAMETER 3
STORMWATER PRETREATMENT DEVICE TO BE DETERMINED 1
LANDSCAPING VARIES 52,349 SQ. FT.

PRIVATE ROAD/FIRE LANE 26'(W) NA
BUILDING 20'(W) X 60'(L) X 15'(H) 1
PARKING SPACE 10'(W) X 20'(L) 4
HANDICAPPED PARKING SPACE 10'(W) X 20'(L) 1
WINDSOCK 20'(H) 2
FIRE COMMAND CENTER 3'(L) x 2'(W) 2
PROJ. NO.:

NO. BY DATE REVISION APP'D.

PERMIT PLAN SET

NOT FOR

CONSTRUCTION

MARICI PROJECT, LLC
16207, 16233, AND 16285 GALE AVENUE
CITY OF INDUSTRY, CA 91745-1719
604109
DG
SH
DATE:

PROFESSIONAL ENGINEER:
3/12/2025

SITE PLAN
C-3.0

GRAPHIC SCALE
NORTH
N
0 50'
1" = 50'
50'
GENERAL NOTES:

1. THIS PLAN SET IS SUBMITTED FOR APPLICATION AND ISSUANCE OF A

LAND USE ENTITLEMENT FOR THE PROJECT FROM THE CITY OF
INDUSTRY.

2. THE LOCATIONS OF PROPOSED IMPROVEMENTS, INCLUDING BUT NOT LIMITED TO: BATTERY ENCLOSURES, TRANSFORMERS, AUXILIARY PADS, FIRE HYDRANTS, ETC., SHOWN ARE APPROXIMATE AND ARE SUBJECT TO

REFINEMENT PRIOR TO GRADING AND BUILDING PERMIT APPLICATIONS

DUE TO SITE CONDITIONS, PERMIT REQUIREMENTS, EQUIPMENT
SPECIFICATIONS, AND/OR OTHER CONSTRAINTS.

3. CONTRACTOR SHALL CALL AT LEAST 72 HOURS PRIOR TO BEGINNING CONSTRUCTION OR EXCAVATION TO HAVE EXISTING UTILITIES LOCATED.

ADDITIONALLY, CONTRACTOR SHALL CONTACT ANY LOCAL UTILITIES THAT PROVIDE THEIR OWN LOCATOR SERVICES.

4. 2-HOUR FIRE WALL TO BE PROVIDED AT HYDRANTS THAT ARE WITHIN 25-FEET OF STRUCTURES

5. FIRE HYDRANTS TO BE PROTECTED BY A FIRE RATED WALL IF REQUIRED BY LACFD.

6. FIRE BEACONS/STROBES WILL BE INCLUDED AS PART OF DETAILED FIRE DESIGN.

7. CAMERAS WILL BE PLACED TO ENSURE VISIBILITY OF ALL MAJOR

EQUIPMENT, THIS DETAIL WILL BE CAPTURED AS PART OF THE DETAILED SECURITY DESIGN.

8. PERIMETER WALL TO BE RATED TO WITHSTAND A POTENTIAL BLAST AND

SHALL BE TOPPED WITH SECURITY WIRE TO MEET LOS ANGELES COUNTY FIRE DEPARTMENT REQUIREMENTS.

9. ALL PROPOSED VEHICULAR ACCESS GATES SHALL BE PROVIDED WITH A FIRE DEPARTMENT APPROVED LOCKING DEVICE.

10. BATTERY CONTAINERS SHALL BE LOCATED A MINIMUM OF 10' INSIDE

THE PROPERTY LINE IN ACCORDANCE WITH LOS ANGELES COUNTY FIRE DEPARTMENT REQUIREMENTS.

PROJECT BOUNDARY

UTILITY EASEMENT

SETBACK

FIRE WATER LINE

STORM DRAIN

UNDERGROUND ELECTRIC LINE

CURB FACE AND BACK

BLAST-RATED CMU WALL

FIRE WALL

ASPHALT PAVEMENT

CONCRETE PAVEMENT

LANDSCAPING (PROPOSED)

LANDSCAPING (PRESERVED)

FIRE HYDRANT

STORM DRAIN MANHOLE

GRATE INLET

CURB INLET

BOLLARD

VEHICULAR ACCESS GATE

PEDESTRIAN ACCESS GATE

BATTERY CONTAINER

TRANSFORMER

AUXILIARY PAD
UE UE
LEGEND

EXISTING FEATURES

PROPOSED FEATURES

GALE AVE

S STIMSON AVE
F F

ST ST ST
UE UE
SD

GENERATOR
SD
NOTES:

ASPHALT PAVEMENT WITH CONCRETE CURB AND GUTTER

CONCRETE DRIVEWAY APRON
1 2

RIGHT-OF-WAY

ADJACENT PARCEL BOUNDARY

ROAD CENTERLINE

ASPHALT PAVEMENT EDGE

CURB FACE AND BACK
TREE

RAILROAD TRACKS

CONCRETE

OVERHEAD ELECTRIC LINE

UNDERGROUND ELECTRIC LINE

GAS LINE

WATER LINE

STORM DRAIN

STORM DRAIN MANHOLE

FIRE HYDRANT

GAS METER

POST INDICATOR VALVE

WATER VALVE

WATER METER

UTILITY POLE

UTILITY BOX

SCE UTILITY VAULT
GAS

OE OE OE
* BASED ON USE OF SUNGROW POWERTITAN 2.0 ST5015kWh-2500kW-2h-US BATTERIES AND POWERTITAN 2.0 MVS5000-LV-US TRANSFORMERS.

Figure 4a
Proposed Site Layout
Source: TRC 2025.
0 Scale (Feet)
130

OE OE OE OE OE OE

F F F F F F F
F F F

F F F F F F F
F

F F F F F

F F F F

UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE

UE UE UE UE UE UE UE UE U

F F F F F F F
F F F

F F F F F F F
F

F F F F F

F F F F

UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE

UE UE UE UE UE UE UE UE U
ST
ST

ST ST ST ST ST ST ST ST ST
ST ST

ST ST ST ST ST ST ST ST ST ST ST ST ST ST ST

ST ST ST ST ST ST ST
ST

ST ST ST ST ST
SD
SD
SD

UNION PACIFIC RAILWAY
PROP 10' SCE ELECTRIC

UTILITY EASEMENT
3' (MIN )
5'
7'
0'
19'
10'

PROP VEHICULAR ACCESS GATE
(SEE NOTE 9)
PROP 10' HIGH BLAST RATED

CMU WALL W/SECURITY WIRE
(SEE NOTE 8)

PROP TRANSFORMER (TYP)

PROP CURB INLET (TYP)

PROP FIRE WATER LINE (TYP)

PROP FIRE HYDRANT
(TYP, SEE NOTE 5)

PROP BATTERY CONTAINER (TYP) PROP STORM DRAIN

MANHOLE (TYP)

PROP GRATE INLET (TYP)

PROPOSED UNDERGROUND TO

OVERHEAD TRANSITION POLE/END

PROP UNDER GROUND ELECTRIC
PROP 10' HIGH BLAST RATED

CMU WALL W/SECURITY WIRE
(SEE NOTE 8)
PROP 10' HIGH

CMU FIRE WALL
PROP 10' HIGH BLAST RATED

CMU WALL W/SECURITY WIRE
(SEE NOTE 8)
PROP 20'X60' O&M BUILDING

PROP CMU TRASH AND

RECYCLING ENCLOSURE
9'(L) X 22'(W) X 6'(H)
7'
10'
25'

EXISTING RETAINING WALL SHALL BE MOVED

TO PROPERTY LINE

PROP PRETREATMENT DEVICE

PROP BOLLARD (TYP)
0' HIGH POLE
NDSOCK
PROP FIRE COMMAND CENTER (2'x3')
5' (TYP) 5' (TYP)
11' (TYP)
4' (TYP)
5' (TYP) 5' (TYP)
11' (TYP) 4' (TYP)
5' (TYP) 5' (TYP)
11' (TYP)
4' (TYP)
11' (TYP)
8' (TYP) 6' (TYP)
5' (TYP)
6' (TYP)
5' (TYP)
8' (TYP)
11' (TYP)
8'
11'
PROP 2-10'X20' PARKING SPACES
PROP 1-10'X20' ADA PARKING SPACE
W/ 5'X20' ACCESS AISLE

PROP PEDESTRIAN ACCESS GATE (TYP)

PROP AUXILIARY PAD (TYP)
30'
14'
3'
20'
13'
PROP 2-10'X20' PARKING SPACES
26' BOC-BOC PRIVATE

DRIVEWAY AND FIRE LANE
(SEE DETAILS SHEET C-6.0)
26' BOC-BOC PRIVATE

DRIVEWAY AND FIRE LANE
(SEE DETAILS SHEET C-6.0

PROP STORAGE CONTAINER (TYP)
PROP 6'(W) X 46' (L) ADA ACCESSIBLE WALKWAY

HEAT PUMP

ASSESSORS PARCEL NUMBER
8242-016-814
(QUASI-PUBLIC: SCE WALNUT SUBSTATION,

NOT A PART OF THE PROJECT)
UMBER

WAREHOUSE,
OJECT)

RS PARCEL NUMBER
242-016-046
AL: ELECTRICAL AND

OLESALE WAREHOUSE,

RT OF THE PROJECT)

PROP SUBSTATION
(SEE SHEET C-7.0)

PROP POCO POLE

PROP RISER POLE
PROP 10' HIGH CMU FIRE WALL

P UNDERGROUND ELECTRIC
6'
1 P)

EX STREET TREE TYP (TO REMAIN)
TY
FT.

PERMIT PLAN SET

NOT FOR

CONSTRUCTION
DATE:

PROFESSIONAL ENGINEER:

GRAPHIC SCALE
NORTH
N
0 50'
1" = 50'
50'
GENERAL NOTES:

1. THIS PLAN SET IS SUBMITTED FOR APPLICATION AND ISSUANCE OF A

LAND USE ENTITLEMENT FOR THE PROJECT FROM THE CITY OF
INDUSTRY.

2. THE LOCATIONS OF PROPOSED IMPROVEMENTS, INCLUDING BUT NOT LIMITED TO: BATTERY ENCLOSURES, TRANSFORMERS, AUXILIARY PADS, FIRE HYDRANTS, ETC., SHOWN ARE APPROXIMATE AND ARE SUBJECT TO

REFINEMENT PRIOR TO GRADING AND BUILDING PERMIT APPLICATIONS

DUE TO SITE CONDITIONS, PERMIT REQUIREMENTS, EQUIPMENT
SPECIFICATIONS, AND/OR OTHER CONSTRAINTS.

3. CONTRACTOR SHALL CALL AT LEAST 72 HOURS PRIOR TO BEGINNING CONSTRUCTION OR EXCAVATION TO HAVE EXISTING UTILITIES LOCATED.

ADDITIONALLYCONTRACTOR SHALL CONTACT ANY LOCAL UTILITIES

PROJECT BOUNDARY

UTILITY EASEMENT

SETBACK

FIRE WATER LINE

STORM DRAIN

UNDERGROUND ELECTRIC LINE

CURB FACE AND BACK

BLAST-RATED CMU WALL

FIRE WALL

ASPHALT PAVEMENT

CONCRETE PAVEMENT

LANDSCAPING (PROPOSED)

LANDSCAPING (PRESERVED)

FIRE HYDRANT

STORM DRAIN MANHOLE

GRATE INLET

CURB INLET

BOLLARD

VEHICULAR ACCESS GATE

PEDESTRIAN ACCESS GATE

BATTERY CONTAINER

TRANSFORMER

AUXILIARY PAD
UE UE
LEGEND

EXISTING FEATURES

PROPOSED FEATURES

GALE AVE

S STIMSON AVE
F F

ST ST ST
UE UE
SD
NOTES:

ASPHALT PAVEMENT WITH CONCRETE CURB AND GUTTER

CONCRETE DRIVEWAY APRON
1 2

RIGHT-OF-WAY

ADJACENT PARCEL BOUNDARY

ROAD CENTERLINE

ASPHALT PAVEMENT EDGE

CURB FACE AND BACK
TREE

RAILROAD TRACKS

CONCRETE

OVERHEAD ELECTRIC LINE

UNDERGROUND ELECTRIC LINE

GAS LINE

WATER LINE

STORM DRAIN

STORM DRAIN MANHOLE

FIRE HYDRANT

GAS METER

POST INDICATOR VALVE

WATER VALVE

WATER METER

UTILITY POLE

UTILITY BOX

SCE UTILITY VAULT
GAS

OE OE OE
(SEE FIGURE 4B FOR DETAIL)

CITY OF INDUSTRY

Page 196 of 6633 ends

MARICI BATTERY ENERGY STORAGE SYSTEM FACILITY INITIAL STUDY / MITIGATED

NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
20 PlaceWorks
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MARICI BATTERY ENERGY STORAGE FACILITY
F F
X X X

LOW BUS

GENERATOR GENERATOR

34.5 kV PAD MOUNTED

STATION SERVICE

TRANSFORMERS

RISER POLE

FIRE WALL
TRANSFORMER 1
(230/34.5kV)

WITH OIL
CONTAINMENT PIT TRANSFORMER 2
(230/34.5kV)

WITH OIL CONTAINMENT PIT
230kV BREAKER 2

SUBSTATION CONTROL
HOUSE

POCO POLE
230kV BREAKER 1
230kV BUS
TIE SWITCH 1 230kV BUS
TIE SWITCH 2
230kV A-FRAME

W/SURGE ARRESTERS,

MOUNTED SWITCH, AND PTS

MAN GATE

BACK UP

GENERATORS
230kV BUS SUPPORT
6’ HIGH

WROUGHT IRON

STYLE FENCE

MAN GATE
10' HIGH CMU

FIRE WALL
10' HIGH CMU

FIRE WALL
10' HIGH BLAST-RATED CMU

WALL W/ SECURITY WIRE
10' HIGH BLAST-RATED CMU

WALL W/ SECURITY WIRE

PROP VEHICULAR ACCESS GATE

34.5kV CIRCUIT

BREAKER FOR
TRANSFORMER 1
(TYP)

34.5kV FEEDER TERMINATION
FOR TRANSPORMER 1 (TYP)

34.5kV BUS

SUPPORT

34.5kV CIRCUIT BREAKER FOR
TRANSFORMER 2 (TYP)

34.5kV FEEDER TERMINATION
FOR TRANSFORMER 2 (TYP)

34.5kV BUS SUPPORT
230kV 45° BUS
230kV 45° BUS
PROJ. NO.:

NO. BY DATE REVISION

PERMIT PLAN SET

NOT FOR

CONSTRUCTION

MARICI PROJECT, LLC
16207, 16233, AND 16285 GALE AVENUE
CITY OF INDUSTRY, CA 91745-1719
DG
SH
DATE:

PROFESSIONAL ENGINEER:
3/12/2025

SUBSTATION PLAN
C-7.0

SUBSTATION LAYOUT
SCALE: 1" = 15' 1
182.98'
236.40'
119.85'

GRAPHIC SC
0 1" = 15'
15'
NORTH
N
Figure 4b
Proposed Site Layout
Source: TRC 2025.
0 Scale (Feet)
35 CITY OF INDUSTRY

Page 198 of 6633 ends

MARICI BATTERY ENERGY STORAGE SYSTEM FACILITY INITIAL STUDY / MITIGATED

NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
22 PlaceWorks
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MARICI BATTERY ENERGY STORAGE SYSTEM FACILITY INITIAL STUDY / MITIGATED

NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
DECEMBER 2025 23

2.3.3 Battery Energy Storage System Enclosures
The proposed project includes lithium-ion batteries that would be housed in purpose-built, freestanding enclosures approximately 10 feet or less in height. The purpose-built enclosures would be designed and installed in accordance with all applicable seismic design requirements of the current California Building Code. The enclosures would also be built in accordance with all pertinent regulations outlined in the Los Angeles County Fire Code (Title 32 of the Los Angeles County Code), which is adopted by reference in the Industry Municipal Code, Chapter 15.28, Fire Code, and NFPA 855, which is the National Fire Protection Association standard for the Installation of stationary energy storage systems. The proposed Project includes the use of the Sungrow PowerTitan 2.0 energy storage system with PowerTitan 2.0 ST5015kWh-2500kW-2h-US battery enclosures.

The battery enclosures include inverters to convert the direct current (DC) flowing in and out of the batteries to alternating current (AC) flowing in and out of the battery containers. Figure 5, Electrical System Details, shows a battery container example. The power inverters would be industry standard, nationally (and internationally) recognized equipment. The inverters would be stand-alone units that operate in both charge and discharge modes in all conditions. They are monitored and controlled remotely with no need for daily staffing on-site. There would be onsite disconnects in the event of an emergency or unscheduled maintenance. The disconnects would allow maintenance personnel and emergency responders to completely de-energize the BESS and connected circuits, preventing electrical hazards during maintenance, repair, or emergencies.

The proposed Project would include 480 battery containers and 120 medium voltage (MV) transformer containers (see Figure 4a for layout and placement of enclosures). Bi-directional MV transformers housed in separate purpose-built containers would be arranged throughout the battery array areas to transform low-voltage AC current from the battery containers to mediumvoltage AC current for collection by medium-voltage conductor cables. Figure 5 shows an example of an MV transformer container. The MV conductor cables would be underground and would connect the MV transformers to an on-site collector substation.

The battery enclosures would contain lithium-ion batteries installed in racks inside the enclosure.

Each enclosure contains six racks with eight modules each, for a total of 48 liquid-cooled battery modules. A Power Conversion System (PCS), which manages how electricity flows between the batteries and the electric grid or facility load, is underneath each rack. The PowerTitan 2.0 includes a vent panel, heat and smoke detectors, a sound beacon, ventilation system, and flammable gas detector. The PowerTitan 2.0 enclosures include an NFPA 69 ventilation system to expel battery vent gas in case of cell failure. The exhaust fan activates upon detection of hydrogen gas and expels air and vent gas. This system is designed to prevent an explosive atmosphere. An inlet louver would be located on the left side of the enclosure near the bottom, and an exhaust

Page 200 of 6633 ends

MARICI BATTERY ENERGY STORAGE SYSTEM FACILITY INITIAL STUDY / MITIGATED

NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
24 PlaceWorks
fan would be located on top of the enclosure near the right side. The exhaust fan would activate upon detection of hydrogen gas and expels air and vent gas.

2.3.4 Battery Safety
Equipment manufacturing, construction, and operations would include comprehensive measures to ensure safe equipment installation and operation. Each battery module and battery container would be inspected and tested at the manufacturer’s facility. Each container would be inspected for damage at the Project Site prior to installation and testing. Once installed, tested, and in operational mode, each battery module would be continuously monitored from an off-site location for electrical current, voltage, and temperature to optimize performance and mitigate potential failures. Batteries performing out of specification would be immediately taken offline by the automated monitoring system.

Battery enclosures would be spaced following National Fire Protection Association (NFPA) Standard 855, Los Angeles County Fire Department (LACoFD) requirements and manufacturer’s specifications to minimize risk of fire spreading to adjacent containers. NFPA 855 would also require comprehensive safety planning submittals to LACoFD, including results of bench-scale fire and explosion testing by the manufacturer and hazard mitigation analysis for the specific type of battery used. An Emergency Response Plan would be reviewed and approved by LACoFD, designed to ensure well-planned, prompt, safe, and appropriate response in the event of an emergency. These submittals would be made to LACoFD after the specific equipment is selected and prior to issuance of building permits. NFPA 855 additionally mandates initial and annual refresher training for facility staff, and the Applicant would coordinate with LACoFD to facilitate site-specific LACoFD staff training.

Each of the BESS enclosures would be equipped with fire prevention, detection, and isolation methods and materials; monitoring systems and controls; and cooling units to keep the batteries at optimal operating temperatures. At a minimum, this would include smoke/fire detection sensors, ground fault detection, alarms, and systems to automatically shut down cooling fans and open electrical contacts in the battery system. In addition, monitoring systems would include heat sensors, gas detectors, and an NFPA 69–compliant explosion prevention system. Each protection system would have a signal that would trigger core power-down during fire, overheating, or other malfunction. The entire project would power down automatically during electrical-fault conditions (e.g., high-voltage, high-frequency, ground fault). In addition, the proposed BESS would be equipped with breakers that could be opened manually to power down different equipment on the Project Site.

Page 201 of 6633 ends

PlaceWorks

MARICI BATTERY ENERGY STORAGE FACILITY
PROJ. NO.:

NO. BY DATE REVISION APP'D.

PERMIT PLAN SET

NOT FOR

CONSTRUCTION

MARICI PROJECT, LLC
16207, 16233, AND 16285 GALE AVENUE
CITY OF INDUSTRY, CA 91745-1719
604109
DG
SH
3/12/2025

PACK CABINET
BATTERY CONTAINER EXAMPLE 1

AIR INLET

PCS CABINET

EXPLOSION VENTING PANEL

AIR COOLER INTEGRATION CABINET

LIQUID COOLING UNIT AREA

DISTRIBUTION AREA

FSS AREA

EXHAUST FAN

LEFT VIEW FRONT VIEW RIGHT VIEW
GENERAL NOTES:

1. EXPOSED SURFACES OF ALL EQUIPMENT SHOWN ARE PAINTED SHEET METAL.

2. COLOR SELECTIONS:

BATTERY CONTAINER - MATTE FINISH WHITE;
MEDIUM VOLTAGE TRANSFORMER CONTAINER - MATTE FINISH WHITE; STATION SERVICE TRANSFORMER - ANSI 70 MATTE FINISH GRAY.

3. SEE SHEET Z1-3610991 FOR EXAMPLE HIGH VOLTAGE TRANSFORMER.

FRONT VIEW
MEDIUM VOLTAGE TRANSFORMER CONTAINER EXAMPLE 3

LC CABINET

TRANSFORMER

ISOMETRIC VIEW
APPROX. 8'
APPROX. 19.88'
APPROX. 9.5'

LEFT VIEW

RIGHT VIEW

REAR VIEW

ELECTRICAL DETAILS
E-1.0
APPROX 20'
APPROX 8'
APPROX. 8'

TOP VIEW

FRONT VIEW SIDE VIEW

TOP VIEW
STATION SERVICE TRANSFORMER EXAMPLE 2
OVERALL HEIGHT 68.3"

67.8"

59.6"

31.7" 25.6"
OVERALL DEPTH 60.8"
OVERALL WIDTH 68.6"
Figure 5
Electrical System Details
Source: TRC 2025.

CITY OF INDUSTRY

Page 202 of 6633 ends

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NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
26 PlaceWorks
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NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
DECEMBER 2025 27

2.3.5 On-Site Collector Substation
A collector substation would also be provided on-site. As shown in Figure 4a, the collector substation would be at the southeast end of the Project Site. Figure 4b illustrates the enlarged collector substation plan and the various components of the substation. The on-site collector substation would include two high-voltage (HV) bi-directional transformers that would convert between the on-site MV systems and the regional electric grid’s high-voltage AC. The HV side of the on-site substation would be 220 kilovolts (kV) and would connect to the adjacent SCE Walnut Substation via a new 220 kV overhead tie line that would cross the eastern site boundary directly into the Walnut Substation. The point of change in ownership (POCO) between the proposed Project and SCE facilities would be an approximately 140-foot-high steel pole. In addition, there would be two station transformers in the on-site substation to provide on-site power. Locations and details of these features are provided in Figure 4b. The substation elevations are shown in Figure 6, Substation Elevations. The main power transformers, which are the tallest feature of the substation, would reach a maximum height of 38 feet and 4 inches above grade.

Substation equipment would include 230 kV and 34.5 kV bus work, circuit breakers, disconnect switches, instrument transformers, metering transformers, two 220/34.5 kV bi-directional transformers, two auxiliary transformers for station service, two back-up generators, a control house with relay protection, a supervisory control and data acquisition (SCADA) system, and a telemetry system.

All outside electrical equipment would be housed in the appropriate National Electrical Manufacturers Association–rated enclosures to withstand outdoor conditions and would be screened from view to the extent feasible on all sides. With the exception of the tie line between the on-site collector substation and the SCE Walnut Substation, all outside electrical cabling onsite would be placed underground.

2.3.6 Telecommunication Facilities
The proposed Project would include telecommunication facilities to meet the communication requirements for interconnecting and communicating with the SCE/CAISO facilities and to support remote operations monitoring. To provide communication with SCE facilities, a fiberoptic line would be used to connect the proposed Project’s collector substation with the SCE substation. Utility interconnection regulations require the installation of a second, separate and redundant, diverse telecom option. Accordingly, the proposed Project would include a diverse fiber route as well as a backup cellular modem to ensure redundancy and reliability.

Project development also includes the provision of a SCADA system. The SCADA system is critical to the CAISO and SCE utility interconnection and for the proper operation and maintenance of the proposed Project. The SCADA system would aggregate all project information from the BESS,

Page 204 of 6633 ends

MARICI BATTERY ENERGY STORAGE SYSTEM FACILITY INITIAL STUDY / MITIGATED

NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
28 PlaceWorks
inverters, transformers, breakers, Fire Alarm Control Panel, and transmission lines. The SCADA system would also communicate with the transmission service provider, grid operator, and the proposed Project’s remote operations center. The SCADA system can also control critical site functions, including charge/discharge, breaker status, and total output.

2.3.7 Tie Line
The high voltage (east) side of the on-site substation would include an A-frame dead-end structure, a riser pole, and a POCO pole that would be extended to connect the 220 kV overhead lines to the POCO and into the adjacent SCE Substation. The design includes an A-frame, riser pole, and POCO pole with heights of 80.5 feet, 102 feet, and 140 feet, respectively (see Figure 7, Tie-Line Pole Details). The heights would be designed to allow the 220 kV line to cross into the SCE Substation above an existing 66 kV line with required clearances for safety. The dead end, poles, and other collector substation structural steel would have a galvanized or other neutralcolored, low-reflective finish.

2.3.8 Site Access, Parking, and Security
The proposed Project would include interior paved access and fire lanes, five parking spaces, and a solid perimeter wall topped with security wire designed to City and LACoFD requirements from Title 32 of Los Angeles County’s Code of Ordinances.

As shown in Figure 4a, access to the Project Site would be provided from two driveways on Gale Avenue and one driveway on Ward Way. The driveways would provide access to the 26-foot internal drive aisle. The drive aisle would meet LACoFD requirements and be designed for twoway circulation. The Project Site would be secured from public entry so only project vehicles would be on-site. Five parking spaces would be provided to accommodate on-site employees and maintenance vehicles. Three of these parking spaces would be adjacent to the office building, and two would be in the central part of the Project Site.

The entire BESS facility would be enclosed by a 10-foot-high solid perimeter wall with security wire whose function would include safety, security, and aesthetics (see Figure 4a). The wall would be set back 30 feet from existing curb lines with landscaping outside the wall. The wall would be constructed of reinforced concrete block designed to withstand a potential explosion and prevent the passage of related projectiles, as required by the LACoFD and Chapter 8-4 of the Los Angeles County’s 2023 Building Code. The wall would also be designed to withstand a potential fire and pressure wave according to LACoFD requirements.

Page 205 of 6633 ends

Pl
Y
aceWorks
2, 4, 6 1, 3, 5

22.5093
2, 4, 6 1, 3, 5
PROJ. NO.:

NO. BY DATE REVISION APP'D.

PERMIT PLAN SET

NOT FOR

CONSTRUCTION

MARICI PROJECT, LLC
16207, 16233, AND 16285 GALE AVENUE
CITY OF INDUSTRY, CA 91745-1719
604109
DG
SH
DATE:

PROFESSIONAL ENGINEER:
3/12/2025

SUBSTATION ELEVATIONS
E-2.0
80'
50'
10'-1"
64'
4'
4' 4'
4' 4'
12'-8" 16'-5" 20' 20'-1" 12'-3" 16'-2" 13'-2"
13' 18'-7" 20'-5" 23'-4" 23'-4"
80'-5"
10'
26'
16'-6"
30'-8"
10'
21'-4"
38'-4"
24'-10"

34.5 KV

CIRCUIT

BREAKER

34.5 KV

CIRCUIT

BREAKER

34.5 KV

CIRCUIT

BREAKER

34.5 KV

CIRCUIT

BREAKER
NOTES:

1. PROJECT SECTION ELEVATIONS ARE FOR LAND PERMITTING.

EOR IS RESPONSIBLE FOR ENSURING ALL REQUIRED

CLEARANCES ARE MAINTAINED AND ALL CODES AND

STANDARDS ARE FOLLOWED AS APPLICABLE UPON
FINALIZING THE DESIGN.

2. MPT OIL CONTAINMENT PIT ASSUMED TO RISE ABOVE
GRADE WITH MPT ON A PEDESTAL IN THE CENTER. MPT
UNIT ASSUMED TO STAND APPROXIMATELY 26' TALL, WITH

ADDITIONAL HEIGHT FROM DIMENSION ACCOUNTED FOR IN
THE PEDESTAL. FINAL HEIGHT OF MPT AND REQUIRED BUS

PENDING FINAL CONTAINMENT PIT DESIGN AND SUBJECT
TO CHANGE.

3. ALL EQUIPMENT AND BUS DIMENSIONS AND DESIGN ARE

ASSUMED AS TYPICAL, ACTUAL DIMENSIONS MAY VARY
BASED ON EQUIPMENT PURCHASED.

4. NEED FOR LIGHTING MAST OF ADDITIONAL LIGHTING
PROTECTION TBD BASED ON ENGINEERING STUDY.
230 KV
45° BUS
230 KV A-FRAME WITH SURGE

ARRESTORS, MOUNTED
SWITCH, AND PTS 230 KV BUS TIE
SWITCH 1
230 KV BUS TIE
SWITCH 2
230 KV
45° BUS

34.5 KV
FEEDER

TERMINATIONS

34.5 KV

CIRCUIT

BREAKER

34.5 KV
BUS

SUPPORT
TRANSFORMER 1
(230/34.5 KV) WITH

OIL CONTAINMENT PIT
230 KV CIRCUIT 230 KV 45° BUS

BREAKER

A-FRAME AND BUSWORK - SOUTH VIEW

BREAKERS, TRANSFORMERS AND BUSWORK - WEST VIEW

A-FRAME - EAST VIEW

GRAPHIC SCALE
0 10'
1" = 10'
10'
230 KV
BUS

SUPPORT
TYPICAL 34.5 KV FEEDER TERMINATION AND

CIRCUIT BREAKER BAY - SOUTH VIEW
(DIMENSIONS ARE TYPICAL)
2, 4, 6 1, 3, 5

22.5093
2, 4, 6 1, 3, 5
PROJ. NO.:

NO. BY DATE REVISION APP'D.

PERMIT PLAN SET

NOT FOR

CONSTRUCTION

MARICI PROJECT, LLC
16207, 16233, AND 16285 GALE AVENUE
CITY OF INDUSTRY, CA 91745-1719
604109
DG
SH
DATE:

PROFESSIONAL ENGINEER:
3/12/2025

SUBSTATION ELEVATIONS
E-2.0
80'
50'
10'-1"
64'
4'
4' 4'
4' 4'
12'-8" 16'-5" 20' 20'-1" 12'-3" 16'-2" 13'-2"
13' 18'-7" 20'-5" 23'-4" 23'-4"
80'-5"
10'
26'
16'-6"
30'-8"
10'
21'-4"
38'-4"
24'-10"

34.5 KV

CIRCUIT

BREAKER

34.5 KV

CIRCUIT

BREAKER

34.5 KV

CIRCUIT

BREAKER

34.5 KV

CIRCUIT

BREAKER
NOTES:

1. PROJECT SECTION ELEVATIONS ARE FOR LAND PERMITTING.

EOR IS RESPONSIBLE FOR ENSURING ALL REQUIRED

CLEARANCES ARE MAINTAINED AND ALL CODES AND

STANDARDS ARE FOLLOWED AS APPLICABLE UPON
FINALIZING THE DESIGN.

2. MPT OIL CONTAINMENT PIT ASSUMED TO RISE ABOVE
GRADE WITH MPT ON A PEDESTAL IN THE CENTER. MPT
UNIT ASSUMED TO STAND APPROXIMATELY 26' TALL, WITH

ADDITIONAL HEIGHT FROM DIMENSION ACCOUNTED FOR IN
THE PEDESTAL. FINAL HEIGHT OF MPT AND REQUIRED BUS

PENDING FINAL CONTAINMENT PIT DESIGN AND SUBJECT
TO CHANGE.

3. ALL EQUIPMENT AND BUS DIMENSIONS AND DESIGN ARE

ASSUMED AS TYPICAL, ACTUAL DIMENSIONS MAY VARY
BASED ON EQUIPMENT PURCHASED.

4. NEED FOR LIGHTING MAST OF ADDITIONAL LIGHTING
PROTECTION TBD BASED ON ENGINEERING STUDY.
230 KV
45° BUS
230 KV A-FRAME WITH SURGE

ARRESTORS, MOUNTED
SWITCH, AND PTS 230 KV BUS TIE
SWITCH 1
230 KV BUS TIE
SWITCH 2
230 KV
45° BUS

34.5 KV
FEEDER

TERMINATIONS

34.5 KV

CIRCUIT

BREAKER

34.5 KV
BUS

SUPPORT
TRANSFORMER 1
(230/34.5 KV) WITH

OIL CONTAINMENT PIT
230 KV CIRCUIT 230 KV 45° BUS

BREAKER

A-FRAME AND BUSWORK - SOUTH VIEW

BREAKERS, TRANSFORMERS AND BUSWORK - WEST VIEW

A-FRAME - EAST VIEW

GRAPHIC SCALE
0 10'
1" = 10'
10'
230 KV
BUS

SUPPORT
TYPICAL 34.5 KV FEEDER TERMINATION AND

CIRCUIT BREAKER BAY - SOUTH VIEW
(DIMENSIONS ARE TYPICAL)
Figure 6
Substation Elevations
Source: TRC 2025.

MARICI BATTERY ENERGY STORAGE FACILIT

CITY OF INDUSTRY

Page 206 of 6633 ends

MARICI BATTERY ENERGY STORAGE SYSTEM FACILITY INITIAL STUDY / MITIGATED

NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
30 PlaceWorks
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Page 207 of 6633 ends

Plac
LITY
eWorks

MARICI BATTERY ENERGY STORAGE FACI
PROJ. NO.:

NO. BY DATE REVISION APP'D.

PERMIT PLAN SET

NOT FOR

CONSTRUCTION

MARICI PROJECT, LLC
16207, 16233, AND 16285 GALE AVENUE
CITY OF INDUSTRY, CA 91745-1719
604109
DG
SH
DATE:

PROFESSIONAL ENGINEER:
3/12/2025

TIE-LINE POLE DETAILS
C-8.0
RISER POLE 1 POINT OF CHANGE OF OWNERSHIP (POCO) 2 (NTS) JKT 12/18/24 POLE REVISION 1

GROUND LINE
102'-0"
℄
11'-0" 15'-0" 15'-0"

GROUND LINE
℄

GROUND LINE
140'-0"
℄
11'-0" 15'-0" 15'-0"

GROUND LINE
℄ SOUTH VIEW WEST VIEW SOUTH VIEW WEST VIEW
Figure 7
Tie-Line Pole Details
Source: TRC 2025.
0 Scale (Feet)
15 CITY OF INDUSTRY

Page 208 of 6633 ends

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NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
32 PlaceWorks
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MARICI BATTERY ENERGY STORAGE SYSTEM FACILITY INITIAL STUDY / MITIGATED

NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
DECEMBER 2025 33
Existing street trees and landscaping adjacent to the sidewalk within the right-of-way on the Gale Avenue frontage would be preserved. Existing landscaping farther away from the street and sidewalk would need to be removed for perimeter wall construction, and new perimeter landscaping would be planted. Features that would be visible above the wall include the higher items in the collector substation (see Figure 6) and the overhead electric line that would cross directly into the SCE Walnut Substation. The proposed on-site substation would be secured from unauthorized entry, with signage in accordance with code requirements for high-voltage electricity. Limiting access to the Project Site would be necessary both to ensure the safety of the public and to protect the equipment from potential theft and vandalism.

The Project Site would be closed to public access with gates that would be maintained and secure.

Internal on-site roads, access gates, and fire hydrants would be designed in accordance with LACoFD requirements. A Knox rapid access system would be provided at gates for fire department access. Roads would be designed for two-way circulation of on-site traffic, which would be minimal, consisting of visits by employees, contractors, and vendors providing periodic maintenance and monitoring visits. Project infrastructure would include two diesel-fired generators to provide backup power for critical functions. Aside from the backup generators, the project does not have any emission sources that require an emissions permit from the South Coast Air Quality Management District. Shielded, downward-directed night-lighting would be provided for safety and security.

2.3.9 Stormwater Drainage Controls and Landscaping
The final finished grade throughout the Project Site will consist of stable surfaces, including asphalt roads and parking spaces, concrete footings and slabs, landscaped areas, and gravel or asphalt in equipment areas not covered by footings or slabs. Under existing conditions, stormwater flows to a public stormwater drain in Gale Avenue that connects to a storm drain in South Stimson Avenue. This storm drain outfalls into the San Joe Creek channel. The proposed surface grading, drop inlets, and underground piping would convey stormwater to the same locations it currently flows, and peak stormwater runoff volumes would be reduced compared to existing conditions because the area of impermeable surfaces would be less (88 percent vs. 92 percent). Biofiltration systems will be included in the drainage design to remove pollutants before stormwater is discharged.

The project is designed with landscaping that exceeds the City’s 12 percent minimum requirement and is more than three feet wide at the Gale Avenue frontage and areas whose views are not obstructed from public vantage points (see Figure 8, Landscaping Plan). The project’s landscaping would comply with the City’s water efficient landscape regulations and guidelines.

Pursuant to City Municipal Code Section 13.18.060, documentation of compliance needs to be submitted prior to construction. The landscaping plan is based on drought-tolerant plant species and would include efficient drip irrigation systems.

Page 210 of 6633 ends

MARICI BATTERY ENERGY STORAGE SYSTEM FACILITY INITIAL STUDY / MITIGATED

NEGATIVE DECLARATION

CITY OF INDUSTRY

2. PROJECT DESCRIPTION
34 PlaceWorks
As shown in Figure 8, the proposed landscape plan includes the provision of numerous trees along the southern site boundary to screen the Project Site. The trees would assist in visually softening and obscuring views of the Project Site’s various components. In addition to the trees, droughttolerant, low-profile shrubs would be planted along the southern and eastern site boundaries.

Existing landscaping along Gale Avenue would be preserved.

2.3.10 Office and Storage Building
The proposed Project includes a 20-foot by 60-foot building in the northeast part of the Project Site that would contain six offices and a conference room for employees and for occasional use by contractors and vendors. The proposed Project is anticipated to have up to two employees onsite daily. The building would include a break area and sanitary facilities and would be designed with architectural elements that comply with City development guidelines (see Figure 9, Building Elevations and Colors). The proposed building would have a stucco exterior and would be 15 feet high. Five parking spaces would be included on the Project Site, including three adjacent to the proposed building.

2.3.11 Southern California Edison Facility Modifications SCE improvements associated with the proposed Project would be designed and implemented by SCE. The following description of anticipated SCE facilities is preliminary and subject to change.

Transmission
From the POCO pole in the proposed Project’s high voltage substation, three overhead 220 kV conductors and a ground wire would cross the eastern property line of the Project Site directly into the SCE Walnut Substation. The design includes a POCO pole that is 140 feet high to provide minimum required clearance passing over an existing power line located just offsite to the east.

The conductors would terminate at dead-end structures at both the proposed Project’s substation and the SCE Walnut substation. SCE would install an approximate 120-foot-tall Tubular Steel Pole with footing and approximately 600 linear feet of 220 kV conductor and ground wire between the POCO pole and an existing 220 kV position located within Walnut Substation.

Page 211 of 6633 ends

PlaceWorks

MARICI BATTERY ENERGY STORAGE FACI LITY

OE OE OE OE OE OE OE OE

UE UE UE UE UE UE UE UE

UE UE UE UE UE UE UE UE
GAS

HINNEN AVE

WARD WAY

GALE AVENUE

F F F F F F F
F
F
F
F
F
F
F
F
F
F
F

F F F F F F

F F F F

UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE UE

UE UE UE UE UE UE UE UE UE UE
UE
NOTE: PRESERVED EXISTING
LANDSCAPE AREA (TYP.)
NOTE: PRESERVED EXISTING
LANDSCAPE AREA (TYP.)

UNION PACIFIC RAILWAY

ASSESSORS PARCEL NUMBER
8242-016-814
(QUASI-PUBLIC: SCE WALNUT SUBSTATION,

NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-059
(INDUSTRIAL: WHOLESALE WAREHOUSE,

NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-046
(INDUSTRIAL: ELECTRICAL AND

LIGHTING WHOLESALE WAREHOUSE,

NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-043
(INDUSTRIAL: DIESEL PARTS AND

SERVICE, NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-029
(INDUSTRIAL: NOT A PART OF THE PROJECT)

ASSESSORS PARCEL NUMBER
8242-016-062
(RECREATIONAL: VETERANS OF

FOREIGN WARS HALL, NOT PART OF PROJECT)
NOTE: PRESERVED EXISTING
LANDSCAPE AREA (TYP.)
PROJ. NO.:

NO. BY DATE REVISION APP'D.

PERMIT PLAN SET

NOT FOR

CONSTRUCTION

MARICI PROJECT, LLC
16207, 16233, AND 16285 GALE AVENUE
CITY OF INDUSTRY, CA 91745-1719
604109
DG
SH
DATE:

PROFESSIONAL ENGINEER:
3/12/2025

LANDSCAPE PLAN
L-1.0

GRAPHIC SCALE

NORTH N
0 50'
1" = 50'
50'

EXISTING FEATURES

PROPOSED FEATURES GALE AVE

S STIMSON AVE
LANDSCAPE NOTES:

1. PLEASE REFERENCE UTILITY PROTECTION AND PLANT INSTALLATION GUIDELINES AND NOTES ON SHEET L-2.0 (LANDSCAPE DETAILS).

2. LANDSCAPE AREA CALCULATIONS:
- LANDSCAPE AREA (PROPOSED): 48,421 SQ. FT.
- EXISTING LANDSCAPE AREA (PRESERVED): 2,951 SQ. FT.
- TOTAL LANDSCAPE AREA (12.81%): 51,372 SQ. FT.

GENERAL NOTES: