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5.5 HAZARDOUS MATERIALS HANDLING <br /> 5.5.2.3 Hazardous Materials Use <br /> 5.5.2.3.1 Construction Phase <br /> Construction will involve the transport of limited quantities of hazardous materials to the <br /> project site and will pose minor hazards associated with their use. Small oil spills may occur <br /> during onsite refueling. Equipment refueling will be performed away from water bodies to <br /> prevent contamination of water in the event of a fuel spill. Therefore,the potential <br /> environmental effects from fueling operations are expected to be limited to small areas of <br /> contaminated soil. If a fuel spill occurs on soil,the contaminated soil will be placed into <br /> barrels or trucks for offsite disposal as a hazardous waste. The worst-case scenario for a <br /> chemical release from fueling operations would be a vehicle accident involving a service or <br /> refueling truck. <br /> The quantities of hazardous materials that will be handled during construction are relatively <br /> small and Best Management Practices (BMPs) will be implemented by contractor personnel. <br /> Therefore,the potential for environmental effects is expected to be small. <br /> 5.5.2.3.2 Project Operation <br /> As stated previously,the LEC will use hazardous materials both during construction and <br /> during project operation. Most of the hazardous substances that will be used by the project <br /> are required for NOX emission controls (i.e., ammonia), treatment and laboratory analysis of <br /> cooling water,facility maintenance,and lubrication of equipment, or will be contained <br /> within transformers and electrical switches. Their storage will be carefully contained within <br /> designated hazardous materials storage areas and their use will be carefully prescribed in <br /> terms of hazardous materials handling plans,facility Health and Safety Plans, and the <br /> Hazardous Materials Business Plan(HMBP). <br /> The project will comply with applicable laws and regulations for the storage of these <br /> materials to minimize the potential for a release of hazardous materials and will conduct <br /> emergency response planning to address public health concerns regarding hazardous <br /> materials storage and use. For the non-CaIARP regulated materials,therefore,the risk of <br /> public exposure and serious hazard is low and would not be significant. The only regulated <br /> substance that will be used for the project at quantities larger than the federal Threshold <br /> Quantity (TQ) is anhydrous ammonia, described in Table 5.4-4. <br /> The CalARP program is designed to minimize the risk that extremely hazardous substances <br /> will cause immediate harm to the public and environment. It requires that an owner or <br /> operator of a business handling more than the threshold quantity of a listed regulated <br /> substance evaluate the use of the substance to determine the potential for and impacts of an <br /> accidental release. <br /> Anhydrous Ammonia <br /> The LEC facility will tie into the existing anhydrous ammonia (99% NH3) in an existing <br /> single stationary aboveground storage tank (AST) currently in use at the STIG plant.A new <br /> ammonia tank will not be built for the LEC facility. The capacity of the tank is <br /> 12,000 gallons;however, the tank is only filled to 85% of its capacity,or 10,200 gallons. The <br /> tank is surrounded by a secondary containment structure capable of holding the full <br /> contents of the tank and accumulated precipitation. The tank is currently filled one to two <br /> times per year for STIG plant operations. <br /> SACI3713221082330015(LEC_5.5_HAZMAT.DOC) 5.5-17 <br />