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I�EAkTHCONV Diesel) • One— 1,000 gallon, horizontal, double-walled steel/concrete tank for Recyclable Gasoline (GAS1) • One — 1,000 gallon, horizontal, double-walled steel tank for Recyclable Gasoline (GAS2) • Two—65 gallon, steel horizontal tanks used for Recyclable Diesel (Diesel Buggy 1/Diesel Buggy 2) Details regarding the hazardous waste tank system are provided in Table 1 and Figure 3. Site photographs, including images of the tanks, are provided in Appendix A. 2.2.1 Secondary Containment The hazardous waste tank systems for the Used Oil and Waste Antifreeze were located within XLPE secondary containment within the Drain Building (see Figures 2 and 3). Additionally, the secondary contained tanks are located within the concrete paved, roofed Drain Building, which is comprised of 2 walls and is open to the west and east sides. The Drain Building floor is constructed of concrete and the west and east entrances are each bordered with a drainage Swale. The concrete floor is relatively flat and provides secondary containment for the piping that extends from the drain racks to the secondary containment for the tanks. Minor drips and spills that occur during removal of the fluids from the vehicles are controlled with absorbent that is drummed and disposed after use. The tanks associated with the Recyclable Gasoline is located directly outside the Drain Building. The double-walled tanks, associated piping, and ancillary equipment are located within a concrete paved and concrete bermed area. For a description of secondary containment and oil spill procedures for the Recyclable Gasoline tanks please refer to the Site's SPCC plan. Dimensions and the associated calculations of the secondary containment capacities are provided in Appendix B. The capacities were calculated by determining the interior volume of each secondary containment unit and ensuring that this volume was greater than the volume of the largest tank plus the maximum volume of the associated piping. In addition,the volume of the other tanks within the associated containment was subtracted from the containment capacity to account for the displaced volume they represent. Each containment tank was found to have excess capacity(see Appendix B). The interior of the containments was relatively clear of trash and debris. The bottom of the containments did not show evidence of damage or leaks. Secondary containment calculations are provided in Appendix B and manufacturer specifications Hazardous Waste Tank Assessment Stockton,CA Auto Parts Group—Pick-N-Pull 3 Project No.04.20160002