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submitted at the earliest possible date but must be submitted no later than close of business,January27, 2023. Public agencies should identify the contact person for your agency in your written comments. Project Location:The Project site is approximately 0.9 mile southwest of Interstate 580 and approximately 5 miles southwest of the city of Tracy adjacent to Pacific Gas and Electric's (PG&E) Tesla Substation, as shown on Figure 1.The Project site consists of approximately 32 acres of a 160-acre parcel(Assessor Parcel Number 209-100-19). The approximately 32-acre Project site is located at 20042 W. Patterson Pass Road within unincorporated San Joaquin County,California(see Figure 1, Project Location).Currently,the site is grazing land with existing residences.The Project is bounded to the north by grazing land, rural residences,the West Patterson Pass, and the Union Pacific Railroad. To the east lies grazing land and open space. Rural residences, grazing land, and open space bound the Project to the south. The Project is bounded by rural residences, grazing land, and the PG&E Tesla Substation to the west within Alameda County. The County of San Joaquin General Plan Land Use Map designates the Project site as General Agricultural, and the County's Zoning Map identifies the site as Agricultural General-160. Regional access to the Project site is provided by Interstate 580, located approximately 0.9 miles to the northeast. Project Description: The Project would involve the construction and operation of a 400-megawatt battery energy storage system to provide reliable and flexible power to the local electrical system. The Project would interconnect at the Tesla Substation immediately adjacent to the site in Alameda County via a 230- kilovolt interconnection generation tie (gen-tie) line. The energy storage facility is anticipated to house lithium-ion batteries totaling 400 megawatts of energy(see Figure 2,Site Plan). Project construction would be in 2024 and is anticipated to come online in 2025 or later. The Project would contain pad-mounted energy storage units, in addition to inverters, supervisory control and data acquisition (SCADA)equipment,a collector substation, and an interconnection gen-tie line to the Tesla Substation. The Project would also include related and supporting facilities such as on-site service roads, gates and security fencing, and temporary laydown and construction areas. Construction is expected to begin as early as 2024 and be completed in approximately 12 months. ENERGY STORAGE SYSTEM Batteries Individual lithium-ion, or similar technology, battery cells form the core of the energy storage system. The battery cells are assembled either in series or parallel connection in sealed battery modules. The battery modules would be installed in self-supporting racks electrically connected either in a series or parallel to each other. The individual battery racks are connected in series or parallel configuration to deliver the energy storage system power rating. At this time, the battery technology for the Project has not yet been finalized;the battery type would be selected based on the technology available at the time of construction. Enclosure Units and Controller Multiple self-contained storage system enclosures would house the batteries, described above, as well as the battery storage system controller. The energy storage system controller is a multi-level control system designed to provide a hierarchical system of controls for the battery modules, power conversion system (PCS), medium voltage system, and up to the point of connection with the electrical grid. The controllers ensure that the energy storage system effectively responds to grid emergency conditions and provides a secondary safety system designed to safely shut down the facility. The storage system enclosure would also house required heating, ventilation, and air conditioning(HVAC), and fire protection systems. Heating, Ventilation, and Air Conditioning Units Each enclosure would be equipped with HVAC systems for thermal management of the batteries. The power for the HVAC system would be provided through a connection to the on-site station service transformer with connection lines installed above and/or below ground. 2