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4 Environmental Analysis 4.9 Hazards and Hazardous Materials would be in compliance with California Health and Safety Code Section 25505(a) and with San Joaquin County Environmental Health Department regulations. Further, the Project would be required to prepare an HMBP per San Joaquin County's Hazardous Materials Business Plan Guidelines. Any hazardous materials that would be stored onsite would be contained in designated areas in accordance with an HMBP. Adherence to the HMBP, as required by the California Hazardous Materials Release Response Plans and Inventory law (Health and Safety Code Section 25500 et seq.), would ensure that all handling, storage, and disposal of hazardous materials would be conducted in accordance with proven practices to minimize exposure to workers or the public. The HMBP includes regular site inspections, a chemical inventory of materials stored onsite, preparation of an employee training plan, and preparation of an emergency response/contingency plan. All workers who will be a part of the transportation process undergo training for the proper handling and assembly of Project components, including battery units.Additional details regarding the emergency response plan are provided in Chapter 2, Project Description. The site would also be fenced to prevent public access to hazardous materials. Lithium-ion batteries would likely be used for the proposed energy storage system and would be contained within steel enclosures. Transformers would contain dielectric insulating fluid in the form of vegetable or mineral oil and would be not routinely be handled by O&M staff. Dust palliatives and herbicides may be transported to the Project site if they are used during operations to control vegetation. These materials would be stored in appropriate containers to prevent accidental release. Equipment containing hazardous materials would be equipped with spill containment areas and battery storage would be in accordance with OSHA requirements, such as inclusion of heating, ventilation, air conditioning, fire protection systems, and spill response supplies. All components would have a comprehensive Spill Prevention, Control, and Countermeasure (SPCC) Plan, in accordance with all applicable federal, state, and local regulations. Therefore, the preparation and implementation of an SPCC Plan, which would describe proper handling, storage, transport, and disposal techniques and methods to be used to avoid spills and minimize impacts in the event of a spill, would further reduce impacts related to hazards to a less than significant level. Closure, Decommissioning, and Site Restoration During the Project decommissioning and site restoration process, all aboveground and below ground equipment above 3 feet below grade would be removed, including steel poles and foundations, electrical wiring and batteries, equipment on the inverter pads, transformer pads, substation pad, and other associated equipment. Equipment at 3 feet or more below grade would remain, such as any below ground portion of the gen-tie line, if the option is chosen to place the gen-tie line below ground. Equipment would be de-energized (i.e., safely disconnected from the power supply) prior to removal, salvaged (where possible), placed in appropriate shipping containers, and secured in a truck transport trailer for shipment offsite. 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 would eventually be disposed of in accordance with the applicable hazardous waste requirements. All remaining oil and lubricants removed from equipment would be transferred to an appropriate container and disposed of in accordance with the manufacturers' specifications and consistent with applicable regulatory requirements. Griffith Energy Storage Project 4.9-14 Tetra Tech/SCH 2022120675 Draft Environmental Impact Report August 2023