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4 Environmental Analysis <br /> 4.9 Hazards and Hazardous Materials <br /> Additionally, PG&E would upgrade the Tesla Substation, and the improvements would include <br /> the installation of a grounding system, disconnect switches, surge arresters, outdoor lighting and <br /> outlets, and fiber termination for the gen-tie line. The improvements made would be within the <br /> existing Tesla Substation footprint. <br /> As a result of these substation improvements and PG&E construction of the gen-tie line from the <br /> POCO to its substation, it is anticipated that there would be minimal impacts related to hazardous <br /> materials. Construction impacts would be similar to those of the battery energy storage facility <br /> and would be regulated by state requirements and BMPs contained in the SWPPP, as previously <br /> discussed. Operation and decommissioning impacts would also be similar to those of the battery <br /> energy storage facility, which would be less than significant. The PG&E Tesla Substation and <br /> proposed gen-tie line are similarly not within 0.25 mile of a school or within an airport land use <br /> plan, such that substation improvements and PG&E construction of its portion of the gen-tie line <br /> would result in no impacts to schools or airports. These substation improvements and construction <br /> of the gen-tie line from the POCO to the substation would be under the jurisdiction of Alameda <br /> County and would not conflict with the Alameda County LHMP. Finally, these substation <br /> improvements and construction of the gen-tie line from the POCO to the substation would also be <br /> designed in compliance with federal, state, and local worker safety and fire protection codes and <br /> regulations and are not anticipated to expose people or structures, either directly or indirectly, to <br /> a significant risk of loss, injury, or death involving wildland fires. Therefore, the PG&E Tesla <br /> Substation improvements and construction of the gen-tie line from the POCO to its substation <br /> would have no significant impact on significance criteria 4.9-1 through 4.9-7. No mitigation <br /> measures would be required. <br /> 4.9.6 Cumulative Impacts <br /> Construction, operation, maintenance, and decommissioning of the Project, in combination with <br /> the incremental impacts of other projects, would not cause or contribute to any significant <br /> cumulative impacts relating to hazards and hazardous materials. As discussed above, the Project <br /> would result in less than significant impacts related to the potential to encounter hazardous <br /> materials, accidents, or upset conditions during the routine use of hazardous materials or release <br /> hazardous materials into the environment that could cause harmful exposures. <br /> Releases of hazardous materials or wastes are site specific, and BESS projects generally do not <br /> cumulatively contribute to the impacts of other projects because of the relatively low quantities <br /> used and stored at these facilities, the relatively low staffing and minimal O&M activities required <br /> during operation, and the nature and characteristics of the emissions. An accident involving a <br /> hazardous material release during project construction or operation are location specific and <br /> limited in geographic scope. Therefore, the Project would not cause or contribute to any significant <br /> cumulative impacts from accidental releases or discovery of hazardous materials and/or wastes. <br /> Hazardous materials to be used during decommissioning and removal activities are of low toxicity <br /> and would consist of fuels, oils, and lubricants. Because these materials are required for operation <br /> of construction vehicles and equipment, BMPs would be implemented to reduce the potential for <br /> or exposure to accidental spills or fires involving the use of hazardous materials similar to what <br /> would be required of other cumulative projects. Impacts from minor spills or drips would be <br /> avoided by thoroughly cleaning up minor spills as soon as they occur in accordance with <br /> construction requirements to which all cumulative projects adhere. While foreseeable projects <br /> Griffith Energy Storage Project 4.9-20 Tetra Tech/SCH 2022120675 <br /> Draft Environmental Impact Report August 2023 <br />