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Spill Prevention, Control and Countermeasure Plan Tesla Treatment Facility Page 15 of 45 2.3.5.2 Movement of Non-Bulk Oil Facility operators at the Tesla Treatment Facility tasked with moving non-bulk oil on fork lifts, container dollies, and other mechanized equipment or vehicles are trained and certified in the proper and safe use of the equipment and in spill response. Spill response supplies and tools are available for use by facility operators to attend to accidental drip or spills during the movement of non-bulk oil and other petroleum products. Non-bulk oil and petroleum products at the Tesla Treatment Facility are stored in vessels of less than 55-gallons capacity, and therefore are not subject to the SPCC Rule. 2.3.6 Discharge or Drainage Control [40 CFR§112.7(a)(3)(iii)] The Emergency Power Generation Facility at the Tesla Treatment Facility is provided with containment and diversionary structures to prevent the discharge oil from reaching a navigable watercourse. The bulk storage tanks and day tanks in the standby power generators are of double- wall construction. In the event of tank failure, the outer shell would contain the volume of oil released from the inner shell. The second shell is designed to hold 110%of the inner shell volume. The fuel port and operational controls (SimplexTM Automated FuelPort) is equipped with a containment box of 20-gallons capacity to capture spills and drips that may occur during fuel transfer. The fuel port is equipped with automatic filling and overfilling protection and spill detection sensors and alarms. Underground fuel supply and return piping is double-walled with the outer shell designed to drain into a below-grade sump that affords capture and visual inspection for leaks or discharges, the sump equipped with spill detection sensors and alarms. Sumps with spill detection sensors are also present in the various pumping equipment used to transfer fuel between the bulk storage tanks and generators' day tanks. The area encompassing the standby power generators,bulk storage tanks and piping is surfaced in part with concrete and pavement, and in part with crushed rock underlain by fill and soil. Any drips and discharges not captured by secondary containment and impacting the ground surface would tend to either collect and pool on the surface, or else infiltrate the surface into underlying fill and soil, until removed by spill responders. Although the area is relatively flat with only a gentle slope,larger volume discharges would tend to flow towards storm drain inlets that form part of the facility's stormwater collection and conveyance system. Stormwater runoff and drainage from the emergency power generation facility is conveyed to a 15-inch underground stormwater sewer pipe that discharges into a retention basin located along the south side of the Tesla Treatment Facility. Part of the stormwater conveyance system, the retention basin captures stormwater runoff and drainage from throughout the Tesla Treatment Facility and provides for containment and sedimentation before flow continues offsite. From the retention basin, drainage flows via underground piping eastward and discharges outside of the facility's fence. From the property perimeter, drainage flows in a northeasterly direction via drainage channels towards Interstate Highway I-580 located approximately 0.6 miles from the Tesla Treatment Facility.