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2) Underground Fuel-Storage Tanks <br /> a) The facility has two 5,000-gallon and one 12,000-gallon <br /> underground tanks used for storing unleaded motor-vehicle fuel, <br /> and they are located south of the Garage Building. They are <br /> single-walled steel tanks which are compatible with the stored <br /> fluid. The tanks are equipped with a computerized fuel level <br /> monitor used for inventory reconciliation. The tank fill-pipes <br /> are equipped with 20-gallon overfill boxes which are <br /> product-tight to contain spills due to overfilling. The <br /> dispenser nozzles used for filling vehicles from these tanks are <br /> equipped with automatic shut-off devices. The Garage Foreman <br /> is responsible for the tanks and their contents. <br /> Possible Spill Occurrence: <br /> i) Overfilling: The greatest spill potential is from <br /> overfilling during the fuel transfer <br /> process (i.e. filling the tank) . Spill <br /> prevention consists of constant supervision <br /> during the filling process. Any fuel <br /> spilled during the filling process would be <br /> contained in the overfill boxes. <br /> ii) Tank Leak: If a leak occurs, it would be discharged <br /> into the soil surrounding the tank. Fuel <br /> inventory in the tank is continually <br /> monitored by the computerized fuel level <br /> monitor. Printouts are reconciled with <br /> readings from the fuel pump totalizer by the <br /> facility personnel. Leak tests are <br /> performed annually to verify the integrity <br /> of the tank and piping. The maximum volume <br /> of fuel that could reasonably be expected to <br /> discharge due to tank leak is 200 gallons. <br /> b) The facility has one 2,000-gallon underground tank used for <br /> storing diesel fuel, and it is located east of the Garage <br /> Building. It is a single-walled steel tank which is compatible <br /> with the stored fluid. The tank is equipped with a <br /> computerized fuel level monitor used for inventory <br /> reconciliation. The tank fill-pipe is equipped with a <br /> 20-gallon overfill box which is product-tight to contain spills <br /> due to overfilling. The dispenser nozzles used for filling <br /> vehicles from this tank are equipped with automatic shut-off <br /> devices. The Garage Foreman is responsible for the tank and <br /> its contents. <br /> 3-3 <br />