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7.4 Controls for Facility Fluid Transfer Operations[112.7(e)(4)] 7.4.1 Oversight No unattended fueling is permitted at the Facility.Fuel deliveries to the 10,000-gallon diesel AST will always be monitored by trained personnel from the fuel supply company(training records kept with the fuel supply company).As part of the fueling procedures,the 10,000-gallon diesel AST is gauged and the tank ullage is calculated.The tank is then only filled to a maximum of 90%capacity.All other fueling on site will be monitored by a trained plant employee. 7.4.2 Secondary Containment A small catchment basin is located beneath the fill port to the 10,000-gallon AST to catch any minor spills during filling.To prevent storm water accumulation,the catchment is covered when not in use.Additionally,spill kits with absorbent pads are available at other equipment filling locations to catch minor drips/spills. 7.43 Fuel Dispensers The dispensers for the 10,000-gallon diesel AST,105-gallon diesel tank,and 105-gallon gasoline tank are equipped with automatic shut-off valves to deactivate the dispensing pumps when the fuel tank on the vehicle or equipment is full.Additionally,an emergency shut-off switch for the 10,000-gallon diesel fuel dispenser is located adjacent to the AST on the outside of the vehicle maintenance shop. 7.4.4 Overfill Prevention Measures The 10,000-gallon diesel AST is equipped with a liquid level sensor to prevent tank overflow. This sensor is an audible alarm that sounds if the tank is filled past 900%capacity.The liquid level sensing device is regularly tested to ensure proper operation. For the 105-gallon diesel and gasoline mobile fuel tanks,a liquid level sensing device is not utilized because these two tanks are not refueled on site.These tanks are refueled offsite at service stations when fueling is attended and a fuel dispenser with an automatic shutoff is used. Because the two 105-gallon tanks are not filled on site,there is no chance of an overfill event occurring at the site.The tanks will be fitted with signs(stickers)that clearly indicate that the " tanks shall not be refueled(filled)on site. 7.5 Spill Cleanup Kits Spill kits are located throughout the site as shown on Figure 2.The spill kits are inspected once a week to ensure that it is properly stocked with absorbent materials.It is ultimately the responsibility of the SPCC Plan Coordinator to ensure that any materials used from the spill kits are replenished as soon as practical.The SPCC Plan Coordinator should also ensure that plant personnel are properly using the spill response materials.Spill kit inspection is included in the weekly environmental checklist(Appendix D). 7.6 Site Security Controls[112.7(e)(9)] The entire Facility is manned twenty-four hours a day,365 days ayear.Buildings are secured during nonoperational hours. srccP —The Scottsco y D A-1 3