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SUMIDEN WIRE PRODUCTS CORPORATION <br /> W CA No. 2714.01 <br /> August 18, 1994 <br /> Page 4 <br /> fire-protection water, or the building, room or area shall be designed to provide secondary <br /> containment of hazardous material liquids and fire-protection water through the use of recessed floors <br /> or liquid-tight raised sills. <br /> Secondary containment shall be designed to retain the spill from the largest single container plus the <br /> design flow rate of an automatic fire-extinguishing system(where applicable) for the area of the room <br /> or area in which the storage is located or the system design area, whichever is smaller. The <br /> containment capacity shall be capable of containing the flow for a period of 20 minutes. <br /> If the storage area is open to rainfall, the secondary containment shall be designed to accommodate <br /> the volume of a 24-hr rainfall as determined by a 25-year storm. When curbs are used, provisions <br /> shall be made for draining accumulations of ground water or rainwater. When secondary <br /> containment is required, a monitoring method capable of detecting hazardous material leakage from <br /> the primary containment into the secondary containment shall be provided. <br /> After conducting site visits and researching the existing secondary containment systems associated <br /> with the aboveground storage tanks, it has been concluded that the existing emergency evacuation <br /> tank serving as secondary containment meets the requirements of the Uniform Fire Code, Division <br /> III, section 80.301. The secondary containment system includes a bermed area equipped with drains <br /> capable of directing a flow, caused by a leak or spill, to an emergency evacuation tank. The <br /> emergency evacuation tank is capable of containing the capacity of the largest aboveground storage <br /> tank plus a capacity of 10 % of the other aboveground storage tanks. A telephone conversation with <br /> Mr. Curt Hambrick of the City of Stockton Fire Department on July 13, 1994, reinforced this <br /> conclusion regarding secondary containment. Additionally, the aboveground storage tanks are not <br /> subjected to rainfall or an automatic fire-extinguishing system. <br /> Sulfuric Acid Rinse Water Sump <br /> Based on extensive review with the State Resources Control Board, it has been concluded that the <br /> sulfuric acid rinse water structure is not regulated as an underground storage tank, and is defined as <br /> `O% <br /> WALLACE•KUHL <br />