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Possible Spill Occurrence <br />i) Overfilling: The waste oil tank inlet is located inside the <br />Garage Building. No more than 5 gallons could <br />be spilled, and spilled oil would stay confined <br />within the building. <br />ii) Oil Removal: There is an overfill box at the tank removal pipe <br />which is product -tight to contain spills during <br />this process. The possibility of a spill during <br />the oil removal process would be minimal. <br />Constant supervision during the removal <br />process and inspection of oil removal <br />equipment minimize the possibility of a spill. <br />The maximum potential spill would be the <br />volume of the hose which would not exceed 6 <br />gallons. <br />2) Underground Fuel -Storage Tanks <br />The facility has two 10,000 -gallon underground tanks used for storing <br />unleaded and diesel motor -vehicle fuel, and they are located south of the <br />Garage Building. They are double -walled fiberglass -clad steel tanks which <br />are compatible with the stored fluid. The tanks and the associated plping <br />have continuous leak monitoring systems: one located in the tank's annular <br />space; and one in the pipeline collection sump. The monitoring sys. ems <br />activate an audible and light alarm in the Garage Building. If an alarm is <br />activated, an assessment to determine the cause will begin and may include <br />leak testing. The tanks fill -pipes are equipped with 20 -gallon overfill boxes <br />which are product -tight to contain spills due to overfilling. The dispenser <br />nozzles used for filling vehicles from these tanks are equipped with <br />automatic shut-off devices. The Division Transportation Supervisor is <br />responsible for the tanks and their contents. <br />Possible Spill Occurrence <br />i) Overfilling: The greatest spill potential is from overfilling during <br />the fuel transfer process (i.e. filling the tanks). Spill <br />prevention consists of constant supervision during the <br />filling process. Any fuel spilled during the filling <br />process would be contained in the overfill boxes. <br />3) Underground Hydraulic Oil -Storage Tank <br />The facility has one 1,000 -gallon underground tank used for storing hydraulic <br />oil, and it is located north of the Garage Building. It is a double -walled <br />fiberglass -clad steel tank which is compatible with the stored fluid. <br />3-3 <br />