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CAMBRIA <br /> Table 5.Estimated TPHg Mass Remaining in Soil-Shell-branded Service Station,6131 Pacific Avenue,Stockton,California <br /> Soil Interval Impacted Soil Impacted Soil Soil Volume Representative TPHg Estimated Soil Total Impacted Total Residual <br /> Thickness Area Concentration Bulk Density Soil Mass TPHg Mass in Soil <br /> (fbg) (ft) (sq-ft) (cu-ft) (mg/kg) (lb/cu-ft) Ob) (lb) <br /> 43-58 <br /> Former UST Area 15 109 1,635 6,000 79.9 130,637 784 <br /> 15 188 2,820 5,000 79.9 225,318 1,127 • <br /> 15 294 4,410 500 79.9 352,359 176 <br /> IS 421 6,315 50 79.9 504,569 25.2 <br /> 15 552 8,280 5.0 79.9 661,572 3.31 <br /> Northern Dispenser Area 15 228 3,420 17.5 79.9 273,258 4.78 <br /> 15 402 6,030 5.0 79.9 481,797 2.41 <br /> Total Estimated Residual TPHg: 8,129 <br /> Notes: <br /> Soil Volume=Impacted soil thickness x impacted soil area[excludes soil volume of greater impact] Total Impacted Sail Mass-Soil Volume(cu-ft)x Bulk Density(@/cu-ft) <br /> Residual TPHg Mass=Impacted soil mass(lb)x Concentration(mg(kg)/1,000,000(mg(kg) <br /> Derived from:Hydrologyjor Engineers;Linsley,Kohler&Paulhus,1982,McGraw-Hill,Inc.pg.179. <br /> Bulk(Dry) <br /> Abbreviations: Soil Type: Density Ob(cu fl): <br /> fbg=Feet below grade Sand 94.8 <br /> It=feet Sandy loam 89.9 <br /> sq-ft=square feet loam 84.9 • <br /> cu-ft=cubic feet Silt loam 79.9 <br /> mg/kg=milligrams per kilogram Clay loam 79.9 <br /> Ib=pounds Clay 74.9 <br /> UST=Underground storage tank Peat 25.0 <br /> 0854 Page 2012 <br />