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Table 8 <br /> Contaminant Mass Calculation <br /> The Earthgrams Company <br /> 2651 South Airport Way, Stockton, CA <br />' October 2004 <br /> Total Petroleum Hydrocarbons-Gasoline in Groundwater <br /> Parameter 0 to 1000 Contour 1000to 10,000 Contour Greater than 10,000 Contour <br /> Area (sq ft} 10,479 8,536 2,074 <br /> Porosity 035 035 035 <br /> Groundwater Thickness(ft} 90 90 90 <br /> Gal/c f Conversion 75 75 75 <br />' UGal Conversion 3 785 3 785 3 785 <br /> Avg TPH Cone (ug/kg) (500) .r 5,000 15,000 <br /> Mass Conversion 0 000000001) 0000000001 0000000001 <br /> 1 orap�^ti <br /> TPH Mass (kilograms) 46852 381647 278188 <br /> D <br /> ota ass 87 <br /> Benzene in Groundwater <br />�) Parameter 0 to 100 Contour 100 tol 000 Contour Greater than 1000 Contour <br /> Area (sq ft) 10,384 1,602 442 <br /> Porosity 035 035 035 <br /> Groundwater Thickness (ft} 90 90 90 <br /> Gal/c f Conversion 75 75 75 <br /> UGal Conversion 3 785 3 785 3 785 <br /> Avg Benzene Cone (ug/kg) 50 500 1,500 <br /> Mass Conversion 0000000001 0000000001 0000000001 <br /> Benzene Mass (kilograms) 04643 07163 05929 <br /> ITotal Benzene Mass 773 <br /> TPH Mass=Area x porosity x g w thickness x 7 5 gaVc f x 3 785 Ugal x avg cone (ug/kg)x 1 E-9 kg/ug <br /> Benzene Mass=Area x porosity x g w thickness x 7 5 gaVc f x 3 785 Ugal x avg cone (ug/kg)x 1 E-9 kglug <br /> Contaminant Mass Calcs XLS 1 Oct 2004 <br />