Laserfiche WebLink
CAMBRIA <br /> Table A2 Estimated Benzene Mass Remaining in Groundwater-Former Texaco Service Station/ARCO,440 West Charter Way,Stockton,California <br /> Contoured Impacted GW Impacted GW Aquifer Volume Estimated Impacted Representative Total Dissolved Total Dissolved <br /> Interval Thickness Area Aquifer GW Volume Concentration Mass Volume <br /> (ft) (sq-ft) (cu-ft) Porosity (gallons) (119/1) Ob) (gallons) <br /> Shallow Groundwater <br /> 1 000 contour 20 3,211 64,220 04 192,146 1,150 184 025 <br /> 100 contour 20 9,254 185,080 04 553,759 500 231 031 <br /> 10 contour 20 9,630 192 600 04 576,259 50 024 003 <br /> 1 contour 20 10,274 205,480 04 614,796 5 003 000 <br /> Total Estimated Residual Benzene 442 060 <br /> i <br /> Notes <br /> Aquifer Volume=Impacted aquifer thickness x impacted aquifer area[excludes aquifer volume of greater impact] <br /> Impacted GW Volume=Aquifer volume(cu-ft)x est porosity(%)x 7 48(gals/cu-ft) <br /> Total Dissolved Benzene Mass=GW volume(gals)x 3 785(Ilgal)x Concentration(ugll)x 2 205 lb/kg!1,000,00,000(uglkg) <br /> Total Dissolved Benzene Volume=Mass(lb)/7 34(lbs/gal) <br /> Approximate density Benzene=7 34 lb/gal <br /> Abbreviations Porosity <br /> GW=Groundwater Sod Ty»e n % <br /> ft=feet Gravel 25-40 <br /> sq-ft=square feet Sand 25-50 <br /> cu-ft=cubic feet Silt 35-50 <br /> lb=pound Clay 40-70 <br /> ug1l=micrograms per liter <br /> From Groundwater,Freeze&Cherry, 1979,Prentice-Hall,Inc,pg 37 (based on Davis,1969) <br /> 1399 Page i of I 1 MON <br />