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UST Closure Report Sharpe Defense Distribution Region West Lathrop,California Paae 20 (16 µg/kg). The sample with 68 µg/kg TPH-D was collected from the south end of the truck fill stand. It also contained 23 mg/kg lead. The only component of the BETX compounds detected above detection limits was traces of xylene in two soil samples from piping trench floors (6.4 and 7.6 gg/kg). The composite sample (SPC-4+SPC-2) from the small stockpile of 50 to 60 cubic yards of materials excavated from the piping trenches contained 28 mg/kg TPH-D, 55 µg/kg MTBE and 19 mg/kg total lead. These concentrations are factors of 28, 5.5 and 4 greater than their respective method detection limits. The discrete sample, SPC-3, was analyzed for oxygenates, only. They had concentrations below the method detection limits. Neither the composite nor the discrete sample was analyzed for BETX compounds. 6.0 MATERIALS HANDLING AND DISPOSAL 6.1 UST and Piping Rinsate Delta Oilfield Services of P.O. Box 1675, Woodland, CA, 95776 (telephone (530) 662-2841) vacuumed 1,500 gallons of sludge from seven USTs (all but the 550 gallon UST) on December 17, 1998. Delta transported the sludge to Chico Drain Oil Service at 1618 West 5th Street, Chico, CA, 95923 (telephone (530) 345-9043) on February 22, 1999 for treatment and disposal. A copy of the generator's copy of the Non-Hazardous Waste Manifest is included in Appendix 6. The waste was classified as Used Oil & Water, non-RCRA Hazardous Waste Liquid. Delta Oilfield Services, the following day, December 18, 1998, vacuumed 2,500 gallons of rinsate from all the USTs into their tank truck. Delta transported the rinsate to Chico Drain Oil Service for treatment and disposal on February 22, 1999 (see Appendix 6 for a copy of the Non- Hazardous Waste Manifest). The 50 gallons of oily rinsate from triple rinsing the product and vapor return piping, were picked up by American Valley Waste Oil, Inc. on February 5, 1999. American Valley transported the rinsate in a tank truck to Industrial Service Oil Company's treatment and disposal facility at 1700 South Soto Street, Los Angeles, CA 90023 (telephone (562) 598-5577). 6.2 Underground Storage Tanks and Product Piping Trident Truck Lines of PO Box 17, Gustine, CA 95322 (telephone (510) 783-2881) transported the eight USTs (as six separate truck loads) from the site on December 23 and 24, 1998. The USTs were transported to Erickson, Inc.'s (Ecological Control Industries, ECI) licensed treatment and disposal facility at 255 Parr Blvd., Richmond, California, 94801 (telephone (510) 235-1393). They were transported as non-RCRA Hazardous Waste Solid Waste Empty Storage Tanks, California Waste No. 512 (see Uniform Hazardous Waste Manifests 984544800 through 98454805 in Appendix 5). The USTs are to be cleaned then disposed of probably sometime in N:\PROJECTS\3546\Reports\3546 UST Closure Report Draft.doc March 24,1999