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sTX*6 <br /> ESTIMATION OF HYDROCARBONS REMOVED BY EXCAVATION <br /> March 8, 1996 <br /> Former Exxon Service Station No. 7-3330 <br /> 3128 West Benjamin Holt Drive <br /> Stockton, California <br /> Tank Removal Tank Basin Overexcavation Pump Island Overexcavation and Waste Oil <br /> Activities -= 500 yds' Activities = 650 yds' Tank = 600 yds' <br /> December 9, 1991 April 1992 May 1992 <br /> 104 yds' 396 yds' 1 250 yds' 150 yds' 250 yds' 150 yds' 150 yds' 150 yds' 150 yds3 <br /> A B C D E F G H I <br /> TPHI as gasoline' 87 0.5` 3.4 0.5` 60.2 0.5` 42 0.5c 0.5c <br /> Benzene' 1.5 0.0025 0.0025` 0.0025 0.031 0.0025 0.0025° 0.0025 0.0025` Total <br /> Pounds of TPH as gasoline 26.87 0.59 2.50 0.22 44.69 0.22 18.7 0.22 0.22 94.28 <br /> Pounds of Benzene 0.46 0.003 0.002 0.001 0.023 . 0.001 0.001 0.001 0.001-17 0.493 <br /> a Total petroleum hydrocarbons. <br /> b Concentrations in parts per million by volume. <br /> Estimation based on a value that is half the value of the laboratory detection limit. <br /> RPTOOI.810 <br /> a <br /> I <br />