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Cascade Energy Storage, LLC Battery Storage Project 1.5.5 Proposed Fire Suppression The proposed method of fire suppression for the project is a clean agent system. Different types of clean agent systems are available and considered effective for fires in battery storage spaces,containers and/or buildings. The two agents being considered for this application are NOVEC 1230 and FM 200. Both operate on the same principle and are stored under pressure. When released, they vaporize and quickly fill the space. They operate much more quickly than sprinklers and extinguish a fire in a confined space, by providing a cooling effect. Both are not reactive to electrical components, leave no residue,are designed to be clean, and have no long-term impact on operations. NOVEC 1230 is more environmentally friendly than FM 200 and other clean agents. Clean agent systems are typically designed for a single activation and would not be available for a second event if the heat of the battery was to continue to rise and re-ignite. As an additional fire preventive measure, portable fire extinguishers will be installed and located in each battery section within the battery building. The final selection of the suppression system will be made after the battery manufacturer has been selected. At that time, after consultation with the manufacturer and review of their fire test data,the fire suppression system will be determined and included as detailed design feature. 1.5.6 EMF-Related Public Concerns of Hazards Recognizing there is a public interest and concern regarding potential health effects and hazards from exposure to EMFs and associated harmonic components, the following discussion provides information regarding EMFs and associated harmonic components as they relate to public health and safety. It is important to note that there is no general agreement reached among scientists that EMFs create a health risk and because there are no defined or adopted environmental standards for defining health risks from EMFs, the EMF information is provided below for the benefit of the public and decision makers. Battery energy storage facilities create varying amounts of EMFs and related harmonic components from the associated power facilities. EMF attenuates rapidly with distance from the source. Given the proximity to sensitive receptors and setbacks that are required, the Project is not anticipated to result in measurable levels of EMF at residences, the closest being approximately 500 feet to the north. There is inadequate evidence of health effects at low exposure levels. The CPUC implemented a number of EMF measurement, research, and education programs, and provided the direction that led to the preparation of the California Department of Health Services comprehensive review of existing studies related to EMFs from power lines and associated potential health risks. The CPUC stated, "at this time we are unable to determine whether there is a significant scientifically verifiable relationship between EMF exposure and negative health consequences. As stated in the rulemaking initiating this proceeding, at this time we are unable to determine whether there is a significant scientifically verifiable relationship between EMF exposure and negative health consequences" (CPUC 2006). Thus, the CPUC has not established any connection between EMF exposure and negative effects to human health. Furthermore, the California Department of Public Health, Environmental Health Investigations Branch, ceased its inquiry into EMF in the mid-2000s (California EMF Program 2006). Page 14