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Possible Spill Occurrence: <br /> i ) Overfilling: The greatest spill potential is from <br /> overfilling during the fuel transfer process <br /> (i .e. filling the tank) . Spill prevention <br /> consists of constant supervision during the <br /> filling process. Any fuel spilled during the <br /> filling process would be contained in the <br /> overfill box. <br /> ii) Tank Leak: If a leak occurs, it would be discharged into <br /> the soil surrounding the tank. Fuel inventory <br /> in the tank is continually monitored by the <br /> computerized fuel level monitor. Printouts are <br /> reconciled with readings from the fuel pump <br /> totalizer by the facility personnel . Leak <br /> tests are performed annually to verify the <br /> integrity of the tank and piping. The maximum <br /> volume of fuel that could reasonably be <br /> expected to discharge due to tank leak is 50 <br /> gallons. <br /> 3) Underground Hydraulic Oil -Storage Tank <br /> a) The facility has one 1,000-gallon underground tank used for storing <br /> hydraulic oil , and it is located north of the Garage Building. It <br /> is a double-walled fiberglass-clad steel tank which is compatible <br /> with the stored fluid. The tank and the associated piping have a <br /> continuous leak monitoring system: one located in the tank's <br /> annular space; and one in the pipeline collection sump. The <br /> monitoring system activates an audible and light alarm in the <br /> Garage Building. If an alarm is activated, an assessment to <br /> determine the cause will begin and may include leak testing. The <br /> tank fill-pipe is equipped with a 20-gallon overfill box which is <br /> product-tight to contain spills due to overfilling. The dispenser <br /> nozzle used for dispensing hydraulic oil in the Garage is not <br /> equipped with a automatic shut-off device. The Garage Foreman is <br /> responsible for the tank and its contents. <br /> Possible Spill Occurrence: <br /> i ) Overfilling: The greatest spill potential is from <br /> overfilling during the oil transfer process <br /> (i .e. filling the tank) . Spill prevention <br /> consists of constant supervision during the <br /> filling process. Any fuel spilled during the <br /> filling process would be contained in the <br /> overfill box. <br /> 3-4 <br />