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CAMBRIA <br /> Table 1 Estimated TPHg Mass Remaining in Groundwater-Shell-branded Service ll Station 620 West Charter Way,Stockton,California <br /> Contoured Impacted GW impacted GW Aquifer Volume Estimated Impacted Representative Total Dissolved Total Dissolved <br /> Interval Thickness Area Jf Aquifer GW Volume Concentration Mass Volume <br /> ft <br /> fl s - cu-ft 4 Porosity (gallons) u lh (gallons) <br /> 30-40 ft interval h <br /> I 400 contour 10 1,055 10,550 04 31 566 1 050 028 005 <br /> 1,000 contour 10 840 8 400 04 25,133 3 150 066 Oil <br /> 100 contour 10 5,122 51 220 04 153,250 500 064 010 <br /> 40 50 ft interval <br /> 100,000 contour 10 1 223 12,230 04 36 592 217 500 66,42 1082 <br /> 10 000 contour 10 5,450 54,500 04 163 064 50 000 6805 1108 <br /> 1,000 contour 10 11,489 114890 0 4 343 751 5,000 1434 234 <br /> 100 contour 10 9 125 91,250 04 273 020 500 1 14 <br /> 50-70 ft interval <br /> 1000 contour 20 13 542 270 840 04 810 353 2,385 16 l3 263 <br /> 100 contour 20 9 973 199 460 04 596 784 Soo 249 041 <br /> 70 80 ft interval 11 <br /> 10 000 contour 10 280 2 800 04 8 378 5200 OM 006 <br /> 1 000 contour 10 14,496 144 960 04 433,720 5 000 18110 295 <br /> 100 contour 10 4,561 45 610 04 136 465 500 057 009 <br /> >80 ft interval <br /> 1 000 contour 15 4 488 67 320 03 151 066 1 900 2 40 039 <br /> 100 contour 15 2,812 42 180 03 94 652 500 039 006 <br /> i <br /> Total Estimated Residual TPHg 19197 3108 <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) I <br /> Total Dissolved TPHg Mass=GW volume(gals)x 3 785(Ilgal)x Concentration(ug/1)x 2 205 Ib/kg/1 000,000,000(ug/kg) <br /> Total Dissolved TPHg Volume=Mass(lb)16 14(lbs/gal) <br /> Approximate density TPHg(gasoline)=6 14 Iblgal <br /> Abbre%intions Porosity <br /> GW=Groundwater Sod Type <br /> ft=feet Gravel 250 <br /> sq-ft=square feet Sand 25-50 <br /> cu ft=cubic Feet Slit 35-50 <br /> lb=pound Clay 40- 0 <br /> ugll=micrograms per liter 1 <br /> From Groundwater Freeze&Cherry 1979 Prentice-Hall Inc pg 37 (based on Davis 1969} <br /> 1 <br /> 0 LSwd.to Chaster W�REPORTSLSCM 10 061App B He Mass EaLmales aks �o(k � I Oi5l2iiO4 <br />