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4 <br /> CAMBRIA <br /> Estimated Inittal Benzene Mass u,Soil-Former Shell Service Station/Pershing Otl,4445 N Pershing Avenue, Stockton,California <br /> Depth Interval Shape Contour Contour Height(h) Soil Volume Estimated Average Samples Used to Total Mass of <br /> (fbg) Length(di) Width(d2) (ft) (cu fl) Benzene Concentration Calculate Average Benzene in Soil <br /> (ft) (ft) <br /> (Mg/kg) Benzene Concentration (lb) <br /> 0-20 <br /> Tl-N,T1-S,T2-N,T2-S, <br /> T3-N,T3-S,T4-N,T4-S, <br /> Former USTs ellipsoid 48 27 20 20,358 1 1 VEW-1,VEW-2 269 <br /> B-4 cylinder 4 4 20 251 007 B-4 000 <br /> TOTAL 3 <br /> Abbreviations and Notes. <br /> fbg=feet below grade Soil Volumes <br /> ft=Peet Ellipsoid=n14(di)(dD(h) <br /> cu ft=cubic feet Cylinder=ir(di/2)`(h) <br /> mg/kg=milligrams per kilogram <br /> lb=pounds Benzene Mass =Soil volume(cu ft)x Avg benzene concentration(mg/kg)1 1,000,000(mg/kg)x 120 lb/cu ft <br /> 0837 Page 1 of 1 <br />