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Draft Colden Chapter #101 Battery Energy Storage Systems Planning Board Revision #15 (dated 8/10/26) iv. Spill prevention procedures; v. Emergency notification procedures; and vi. Procedures for handling, cleanup, transport, and disposal of contaminated materials. (b) Spill Prevention and Secondary Containment The BESS facility shall be designed, constructed, and operated to prevent the release of hazardous materials to the environment. Where hazardous liquids are present, secondary containment shall be provided in accordance with applicable federal, state, and local requirements and shall be designed to contain not less than one hundred ten percent (110%) of the volume of the largest individual vessel or container, unless otherwise approved by the applicable regulatory authority. (c) Firefighting Water and Contaminated Runoff Management The Applicant shall demonstrate measures to prevent contaminated runoff, fire suppression water, battery electrolyte, or debris resulting from equipment failure, thermal events, or emergency response activities from entering: i. Surface waters; ii. Wetlands; iii. Stormwater conveyance systems; iv. Groundwater; and v. Adjacent properties. Containment methods may include grading controls, berms, containment basins, shutoff valves, isolation structures, or other equivalent engineering measures acceptable to the Town. (d) Emergency Response Coordination The Applicant shall provide documentation demonstrating coordination with the applicable fire department and emergency responders regarding emergency procedures addressing: i. Thermal runaway events; ii. Fire suppression; iii. Hazardous material releases; iv. Off-gassing events; and v. Site access and emergency response protocols. (e) Regulatory Compliance The facility shall comply with all applicable federal, state, and local regulations governing hazardous materials management, spill prevention, environmental protection, and emergency response, including any applicable Spill Prevention, Control, and Countermeasure (SPCC) requirements. (f) Decommissioning TOWN OF COLDEN – BATTERY ENERGY STORAGE SYSTEMS 15