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The Water Plant Fire Pump has a 550-gallon diesel AST. A spill <br /> event could be caused by the rupture or leaking of the AST (Figure <br /> 5). <br /> A rupture or leakage of the primary containment of the AST in the <br /> Fire Pump housing assembly would be captured by the secondary <br /> containment system of the AST. Rupture or leakage of the <br /> secondary containment would be contained in the fire pump <br /> housing assembly that is skid mounted on a concrete slab. <br /> 4.2.2 Tank Filling Operations <br /> A spill event could occur during outside vender tank filling <br /> operations. The fueling operator remains with, and monitors with <br /> direct vision gauges, the fuel level in the tank at all times to avoid <br /> a spill due to overfilling. In addition, a spill due to overfilling can <br /> be avoided by operations personnel confirming the ordered product <br /> quantity and requiring verification of delivery quantity on the <br /> tanker truck's CHCF order forms. Tanker truck operators are also <br /> supplied with tank capacity charts. Tanks are marked with their <br /> tank capacities. The fueling operator also remains with, and <br /> monitors, the unloading operation at all times. Delivery truck <br /> operators are required to inspect hoses and connections prior to <br /> beginning delivery operations and delivery trucks are equipped <br /> with brake interlock hookups that prevent the truck from being <br /> moved while the delivery hose is connected. <br /> 4.2.3 Tank Dispensing Operations <br /> A spill event could occur during tank dispensing operations or <br /> from failure of the piping from the tanks to the dispensing ports. <br /> ASTs and the aboveground piping from ASTs are located outside <br /> of the traffic lanes, and are protected by fencing to prevent damage <br /> by vehicles. The aboveground piping is visually inspected daily by <br /> operations personnel when the fuel dispensing system is in <br /> operation and inspections are performed monthly and annually. <br /> Absorbent and spill containment materials are stored near the <br /> dispensing ports. The area is inspected after each dispensing <br /> operation and any small spills are cleaned up immediately with <br /> absorbent materials. The pads and/or removed petroleum products <br /> would then be disposed of according to applicable regulations. <br /> Table 4-1 summarizes the predicted direction, rate of flow, and <br /> total quantity of petroleum products that could be discharged from <br /> the facility as a result of each major failure type. <br /> 8411599 Page 8 <br />