one-year time extension for a Site Approval granted in September 2020. The original Site Approval was determined to be categorically exempt from CEQA review and a Notice of Exemption was filed and posted in September 2020. For reference purposes only, a description of the Site Approval is provided below.
The Site Approval was granted in 2020 for a remotely operated and monitored 25 MW / 100 MWh battery energy storage system (BESS) facility located on approximately 2.2 acres of a 4.76-acre parcel in unincorporated San Joaquin County, adjacent to the city of Stockton. The Project will establish an unmanned, 25-megawatt (MW) battery energy storage system facility utilizing 2.2 acres of a 4.76-acre parcel to include 38 storage containers totaling 12,160 square-feet to house battery storage racks for lithium batteries; 1 auxiliary battery storage container; 16 inverters/transformers totaling 1,920 square-feet to convert between AC and DC and to step up the voltage; and 1 site substation totaling 5,940 square-feet. The Project includes accessory equipment including inverters, switchgear, telecommunications equipment, and an approximately 120-square-foot spare parts enclosure; an ancillary project substation; a 15,000-gallon water tank for fire protection; access roads and parking area, pads for battery cabinets and accessory equipment; underground wires and cabling connecting the batteries to the Project substation; and perimeter fencing. The battery cabinets, accessory equipment, water tank, and project substation are non-habitable, small structures with a total footprint of approximately 20,565 square-feet.
A new 60 kV generation interconnection transmission line (gen-tie) on a new, approximately 70-foot-high monopole would connect the BESS to PG&E Weber Substation on the adjacent parcel to the west. Fiber optic cables would also be installed underground to provide a telecommunications connection between the Project site and the PG&E facilities. PG&E would also reconductor approximately one-mile of existing 60-kV power line in the city of Stockton near the Project site, replacing existing conductors and replacing wood support poles with light-duty steel poles at a similar height (40-feet above street level) within the existing alignment.