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Project Description Griffith Energy Storage Project A maximum of approximately 48 average daily truck trips (during site preparation and grading) and 120 average daily worker vehicle trips (during energy storage enclosure installation) are anticipated, as shown in Table 1. Table 1. Construction Vehicle Trips Construction Phase Duration Construction Average Daily Average Daily Average Daily weeks Workforce Worker Tris Vendor Tris Haul Trips' Site and Substation 12 20 40 4 46 Preparation and Grading Energy Storage 20 60 120 20 20 Enclosure and Substation Installation Gen-Tie Foundation and 3 20 40 4 20 Tower Erection Gen-Tie Line Pulling and 3 20 49 4 20 Stringing Testing and 8 20 40 0 0 Commissioning 'including 20 one-way water truck trips per day throughout construction(20 round trips) Erosion and Sediment Control and Pollution Prevention As the construction of the Project would result in disturbance of an area greater than 1 acre, the Applicant would be required to obtain coverage under the State Water Resources Control Board (SWRCB) National Pollutant Discharge Elimination System (NPDES)General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities, Order No. 2009-009-DWQ, NPDES No. CAS000002 (Construction General Permit). To enroll under this permit, the Applicant would prepare a SWPPP, which would be based on the final engineering design. The SWPPP would be prepared by a qualified engineer or erosion control specialist and would be implemented during construction. The SWPPP would include BMPs, including Erosion Control, Sediment Control, and Good Housekeeping BMPs. The BMPs would include dewatering procedures, stormwater runoff quality control measures, concrete waste management, watering for dust control, and construction of perimeter silt fences, as needed. The SWPPP would be submitted to the SWRCB and San Joaquin County prior to issuance of any building or grading permits. Construction Water and Wastewater During construction, an estimated 10,000,000 gallons of non-potable water(approximately 30.7 acre-feet [afj)' are anticipated to be required for dust suppression and other purposes. Water would be trucked to the Project site from a nearby source. Nominal liquid human waste would be generated during construction. Portable restroom facilities would be provided for workers during construction. Solid Waste The majority of solid waste generated during construction would be non-hazardous and consist primarily of cardboard,wood pallets, copper wire, scrap metal, common trash, and wood wire spools. Construction waste materials such as metal and wood would be separated from the waste stream and recycled whenever feasible. Construction materials would be handled in accordance with the California Green Building Standards Code (CCR 2019),which establishes standards for construction and demolition waste One of of water equals 325,851 gallons—approximately the amount needed to cover an acre(roughly a football field)of ground 1 foot deep. June 2022 6 Griffith Energy Storage, LLC