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TABLE G-2 Page 1 of 1 <br /> ESTIMATED BENZENE MASS IN SOIL <br /> SHELL-BRANDED SERVICE STATION <br /> 2494 EAST FREMONT STREET, <br /> STOCKTON,CALIFORNIA <br /> Impacted Soil Impacted Soil Impacted Soil Soil Volume Representative Benzene Estimated Soil Total Impacted Total Residual Total Residual <br /> Thickness Interval Area Concentration Bulk Density Soil Mass Benzene Mass in Soil Benzene Volume in Soil <br /> (ft) (ft) (sq-ft) (cu-ft) (mg/kg) (lb/cu-ft) (lb) (lb) (gallons) <br /> 5.0 5-10 23 115 0.55 89.9 10,339 0.006 0.0008 <br /> 5.0 5-10 16 80 5.10 89.9 7,192 0.037 0.0050 <br /> 12.0 >30-42 10 120 0.55 89.9 10,788 0.006 0.0008 <br /> 12.0 >30-42 7 84 1.60 89.9 7,552 0.012 0.0016 <br /> Total Estimated Residual Benzene: 0.060 0.0082 <br /> Notes: <br /> Soil Volume=Impacted soil thickness x impacted soil area[excludes soil volume of greater impact] <br /> Total Impacted Soil Mass=Soil Volume(cu-ft)x Bulk Density(lb/cu-ft) <br /> Residual Benzene Mass=Impacted soil mass(lb)x Concentration(mg/kg)/1,000,000(mg/kg) <br /> Benzene Mass to Benzene Volume=Mass Benzene(lbs)/ 7.33(lb/gal) <br /> Bulk(Dry <br /> Abbreviations: Soil Type: Density(lb/cu ft): <br /> ft=feet Sand 94.8 <br /> cu-ft=cubic feet Sandy loam 89.9 <br /> kg=kilograms Loam 84.9 <br /> mg/kg=milligrams per kilogram Silt loam 79.9 <br /> sq-ft=square feet Clay loam 79.9 <br /> lb=pounds Clay 74.9 <br /> Peat 25.0 <br /> Derived from:Hydrology for Engineers;Linsley,Kohler&Paulhus,1982,McGraw-Hill,Inc.pg.179. <br /> CRA 240797(18) <br />