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September 14, 1998 <br /> Page 6 <br /> SUMMARY OF FINDINGS <br /> • The maximum O & G concentration (2,700 mg/kg).was detected at 8 feet bgs from <br /> beneath Hoist 1 <br /> • Product line and dispenser soil sampling results reported the maximum concentrations <br /> of TPH-g, benzene, and MtBE were detected in sample P-16 at 11, 0 64, and 5 7 mg/kg <br /> respectively, at 5 feet bgs <br /> • Soil sample WO-1 at 11 feet bgs from waste oil tank 1 reported maximum <br /> concentrations of TPH-g, TPH-d, and O & G at 170, 5,300, and 25,000 mg/kg <br /> respectively The maximum VOC concentration (160 ppb of tetrachloroethene) was <br /> detected at WO-2 <br /> • Soil sample results from waste oil tank 1 over-excavation activities reported maximum <br /> concentrations of TPH-g and TPH-d from WO-C at 110 and 4,900 mg/kg at 17-1/2 feet <br /> bgs The maximum concentration of O & G was reported from WO-W at 9,400 mg/kg <br /> from 11-1/2 feet bgs Benzene, MtBE, PCBs, and lead were not detected in waste oil <br /> tank 1 <br /> • Soil sample results from waste oil tank 1 reported the maximum VOC concentrations <br /> of acetone, tetrachloroethene, and cls-1,2-Dichloroethane at 900 ppb, 1,500 ppb, and <br /> 2,200 ppb, respectively from WO-C A single SVOC detection was reported as <br /> 1,2-Dichlorobenzene at 2,200 ppb from WO-N at 12 feet bgs <br /> • Soil sample results form waste oil tank 2 reported nondetectable concentrations at 8-1/2 <br /> feet bgs for all constituents analyzed except for CAM 5 metals Chromium, nickel, and <br /> zinc were reported at 40, 28, and 47 mg/kg respectively <br /> • No groundwater or surface runoff accumulation were detected in any of the <br /> excavations <br /> 920-119 l A/TKPULRPr DAC <br />