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Spill Prevention, Control and Countermeasure Plan Tesla Treatment Facility Page 10 of 45 2.3.1 Facility Type Power from the Hetch Hetchy Water and Power grid supplies the power needs of the Tesla Treatment Facility. For backup power, the facility relies on the Emergency Power Generation Facility that consists of two(2)fixed,standby power generators each fueled by a diesel day storage tank in the generator's enclosure. The day tanks are replenished with fuel via an automatic fuel transfer system from two (2) aboveground storage tanks (ASTs). The two (2) standby power generators each of 1.5 MW capacity are each housed in a steel enclosure that is secured onto a reinforced concrete pad. Fuel piping extends from the two (2) bulk storage tanks to control consoles next to the standby power generators and then continues from the consoles to the generators day tanks (PCL, August 6, 2011). The Emergency Power Generation Facility is located at the northeast end of the Tesla Treatment Facility. Meeting the requirements of 40 CFR§112.7(a)(3) of the SPCC Rule, Figure A-4.3 and Figure A-4.4 in Appendix A are plan views of the facility showing the layout of the standby power generators, bulk storage tanks,piping, loading/unloading area, and leak/spill control equipment. The two (2) bulk diesel storage tanks are each of 8,000-gallons capacity and of double-wall construction. The two (2) generator day tanks are each of 150-gallons capacity, also of double- wall construction. The engine crankcase of each generator contains 82 gallons of motor oil. The fuel loading/unloading area is located on the south side of the bulk storage tanks and includes a tank filling port used for the transfer of diesel fuel between the tanker truck and bulk storage tanks. A system of underground double-wall piping and aboveground single-wall piping provide for the transfer of diesel fuel from the bulk storage tanks to the generator day tanks(PCL,August 6,2011). The electrical system to operate the Tesla Treatment Facility includes a unit-type substation transformer that is located on the south side of the Electrical Building; refer to Figure A-5.1 in Appendix A. The substation transformer(5210-15-10)is mounted on a concrete pad and equipped with a steel storage tank of sealed tank construction and filled with dielectric or insulation fluid. The storage tank integral of the transformer has a 723-gallon capacity. The transformer's dielectric fluid filling the tank is Envirotemp® FRYM. Envirotemp® FRYM, an electrical insulating or dielectric fluid based on a natural ester derived from 100%renewable vegetable oils, is formulated from seed oils and performance enhancing additives. The product contains no polychlorinated biphenyls (non-PCBs), no petroleum, halogens, silicones or sulfurs. The fluid is biodegradable, non-toxic, sustainable, recyclables, and possesses a high fire point (K class). It quickly and thoroughly biodegrades in the environment(Cargill, 2016; PCL, August 6, 2011). Appendix D presents photos of the Emergency Power Generation Facility and the substation transformer at the Electrical Building. 2.3.2 Facility Location The Tesla Treatment Facility is located at 9000 W. Vernalis Road in Tracy, California.