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• a • <br /> CAMBIUA <br /> Table 4 Estimated TPHg Mass Remaining in Soil-Chevron Station 9-1848 - 1257 W Yosemite Avenue, Manteca, California <br /> Impacted Soil Impacted Soil Sol]Volume Representative TPHg Estimated Soil Total Impacted Total Residual Total Residual <br /> Thickness Area Concentration Bulk Density Soil Mass TPHg Mass in Soil TPHg Volume in Soil <br /> (ft) (sq-ft) (cu-ft) (mg/kg) (lb/cu-ft) (lb) (lb) (gallons) <br /> 60 2,500 8,440 4 899 755,160 3 0 492 <br /> 40 2,300 6,600 40 899 593,340 24 3 865 <br /> 20 1,300 2,600 150 899 233,740 35 6 <br /> Total Estimated Residual TPHg 619 101 <br /> Notes: <br /> Soil Volume=Impacted soli 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 TPHg Mass=Impacted soil mass(lb)x Concentration(mg/kg)1 1,000,000(mg/kg) <br /> TPHg Mass to TPHg Volume=Mass TPHg(lbs)/6 14(lb/gal) <br /> Approximate density TPHg(gasoline)=45 9 lb/cu-ft <br /> Bulk(Dry) <br /> Abbreviations Soil Type Density <br /> -(Ib/cu ft <br /> ft=feet Sand 948 <br /> cu-ft=cubic feet Sandy loam 899 <br /> kg=kilograms Loam 849 <br /> mg/kg=milligrams per kilogram Silt loam 799 <br /> sq-ft=square feet Clay loam 799 <br /> Clay 749 <br /> Peat 250 <br /> Derived from Hydrology for Engineers,Linsley, Kohler&Paulhus, 1982,McGraw-Hill, Inc pg 179 <br /> R 19 1848 MantecalClosurelCopy of Mass Estimating Spreadsheet 11-03 Page t of t 3/23/2006 <br /> I <br />