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2 Project Description for dust control, and construction of perimeter silt fences, as needed. The SWPPP would be submitted to the SWRCB, San Joaquin County, and Alameda County prior to issuance of any building or grading permits. 2.5.3.8 Construction Water and Wastewater During construction, an estimated 10,000,000 gallons of non-potable water (approximately 30.7 acre-feet[afj)2 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, up to 30 gallons per day. Portable restroom facilities would be provided for workers during construction. 2.5.3.9 Solid Waste Most 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 (24 CCR Part 11, § 5.408), which establishes standards for construction and demolition waste management, and recycling or salvage of a minimum of 65 percent of nonhazardous construction and demolition waste. Non-recyclable construction waste would be placed into commercial trash dumpsters located on-site. Dumpsters would be collected as needed by a commercial service and delivered to a landfill. Construction would generate an average of approximately 5 cubic yards of solid waste per week over the period of construction. Typically, no solid waste would be generated on-site during operations. During infrequent operations and maintenance (O&M) activities, the Project would generate a small amount of waste, such as broken or rusted metal, defective or malfunctioning equipment, electrical materials, empty containers, other miscellaneous solid waste, and typical refuse from the O&M staff. Less than 1 cubic yard of waste per week during infrequent O&M activities would be accumulated in an on-site dumpster that would be collected by a commercial waste management service. 2.5.3.10 Hazardous Waste and Hazardous Materials The proposed energy storage system will likely use lithium-ion batteries. If utilized, the batteries would be delivered to the Project site in U.S. Department of Transportation-certified vehicles and in compliance with all applicable requirements of the U.S Department of Transportation, California Highway Patrol, and the California Department of Motor Vehicles. Further, batteries may be considered hazardous waste in California when they are discarded, whether or not they are rechargeable. Accordingly, the battery modules included in the BESS eventually would be disposed of in accordance with the applicable hazardous waste requirements. These materials would be stored and handled in a manner to prevent accidental 2 One of of water equals 325,851 gallons—approximately the amount needed to cover 1 acre (roughly one football field)of ground 1 foot deep. Griffith Energy Storage Project 2-14 Tetra Tech/SCH 2022120675 Draft Environmental Impact Report August 2023