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c <br /> Geo Strategies Inc. <br /> s <br /> 0 UNOCAL Corporation <br /> September 11, 1992 <br /> Page 6 <br /> 0 Hydraulic Lift and Oil-Water Separator Stockpile <br /> Approximately 40 cubic yards of excavated soil from the hydraulic lifts and oil- <br /> water separator was stockpiled southwest of the station building Composite <br /> sample SLS-IA-D was collected from this stockpile (Plate 3) and analyzed for <br /> TPH-Gasoline, TPH-Diesel, TPH-Oil, BTEX, O&G and PCBs <br /> 1 <br /> Composite sample SLS-IA-D contained 340 ppm TPH-Gasoline, less than 100 <br /> ppm TPH-DieseI, 1400 ppm TPH-Oil and 2500 O&G BTEX and PCBs <br /> concentrations were reported as ND Chemical analytical data are summarized in <br /> Tables 2 and 3 <br />` TRENCH OVEREXCAVATION <br /> Upon receipt of the analytical results, overexcavation of the area near trench <br /> sample UT-3 was required On May 6, 1992, approximately 5 cubic yards of <br /> soil were excavated and stockpiled southeast of the former station building <br /> (Plate 3) Soil sample UT-3X was collected from the bottom of the excavation <br /> • at a depth of approximately 4 5 feet below grade (Plate 3) Sample UT-3X was <br /> analyzed for TPH-Gasoline, BTEX, EDB and total lead <br /> Sample UT-3X contained 10 ppm total lead and was ND for TPH-Gasoline, <br /> BTEX and EDB Chemical analytical data are summarized in Table 1 <br /> Stockpile sample US - 10 was collected on May 6, 1992, representing <br /> approximately 5 cubic yards of soil generated dunng the overexcavation of <br /> sample UT-3 Sample US-10 was analyzed for TPH-Gasoline, BTEX, EDB and <br /> organic lead <br /> Sample US-10 contained 1 8 ppm TPH-Gasoline, 021 ppm benzene and was <br /> ND for EDB and org <br /> Tables 2 and 3 anic lead Chemical analytical data are summarized in <br /> SOIL STOCKPILE DISPOSITION <br /> Upon receipt of the chemical analytical results, soil stockpiles were transported <br /> to an appropriate disposal facility Approximately 153 cubic yards of soil were <br /> transported to Laidlaw Environmental Services Lokern disposal facility located in <br /> ButtonwiIlow, California Approximately 225 cubic yards of soil were <br /> transported to the Browning Ferris Inc Landfill located in Livermore, <br /> California <br /> 782701-1 <br />