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4 Environmental Analysis 4.9 Hazards and Hazardous Materials responds to grid emergency conditions and provides a secondary safety system designed to safely shut down the facility. All batteries would be contained within specifications that follow applicable federal state and local requirements, including the inclusion of appropriate ventilation, acid resistant materials, and presence of spill protection supplies. Combustible vegetation or agricultural products on and around the Project Boundary would not be routinely handled by O&M staff, but managed by the Project owner or its affiliates during operation. Removal and/or maintenance of vegetation may require the use of herbicides. If not handled properly; use of these products could create a hazard to the public (e.g., construction workers, maintenance employees, and nearby residences). However, application would be limited, application would be in accordance with federal, state, and County regulations, and any herbicides would be applied by a state-licensed pesticide applicator. This Applicant-proposed activity and adherence to regulatory requirements would reduce impacts related to use of herbicides to a less than significant level. The Project would not involve the routine transport, use, or disposal of hazardous materials, as defined by the Hazardous Materials Transportation Uniform Safety Act. Adherence to regulations and Applicant-proposed protocols during the storage, transportation, and usage of any hazardous materials would minimize and avoid the potential for significant upset and accident condition impacts. Closure, Decommissioning, and Site Restoration The closure, decommissioning, and site restoration process is summarized under Impact 4.9-1 above. Many components of the BESS are recyclable. Project components would be recycled to the extent feasible, with minimal disposal to occur in landfills in compliance with all applicable laws. See Section 4.17, Utilities and Service Systems, for information about landfill capacity. The disposal of batteries may be considered hazardous waste and will be disposed of in accordance with the applicable hazardous waste requirements. Metal, scrap equipment, and parts that do not have free-flowing oil can be sent for salvage. Equipment containing any free-flowing oil would be managed as waste and would require evaluation. Oil and lubricants removed from equipment would be managed as used oil, which is a hazardous waste in California. Ultimately, impacts related to reasonably foreseeable upset and accident conditions involving the likely release of hazardous materials into the environment would be less than significant during construction, operation, and eventual decommissioning of the Project. Mitigation: None required. IMPACT 4.9-3: Would the project emit hazardous emissions or handle hazardous materials or acutely hazardous materials, substances, or waste within 0.25 mile of an existing or proposed school? (No Impact) The nearest school, Peter Honsen Elementary School, is located approximately 3.25 miles north of the Project site. The Project is not located within 0.25 mile of an existing or proposed school; as such, there would be no impact. Mitigation: None required. Griffith Energy Storage Project 4.9-16 Tetra Tech/SCH 2022120675 Draft Environmental Impact Report August 2023