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1 <br /> Table 7 <br /> Mass Calculation -Total Petroleum Hydrocarbons-Gasoline in Groundwater <br /> The Earthgrams Company - 2651 S Airport, Stockton <br /> October 18, 2000 <br /> Parameter 0 to 1,000 Contour 1,000 to 10,000 Contour Greater than 10,000 Contour <br /> Area (sq ft) 84,476 14,186 2,122 <br /> Porosity 035 035 035 <br /> Groundwater Thickness (ft) 50 50 50 <br /> Gal/c f Conversion 75 75 75 <br /> l_/Gal Conversion 3 785 3 785 3 785 <br />' Avg TPH Conc 500 5,000 13,000 <br /> Mass Conversion 0000000001 0000000001 0000000001 <br />' TPH Mass 209830 352367 137042 <br /> Total TPH-G Mass (Kilograms) 699239 <br /> February 5,2003 <br /> MParameter 0 to 1,000 Contour Greater than 1,000 Contour <br /> Area(sq ft) 34,504 3,514 <br /> Porosity 035 035 <br /> Groundwater Thickness (ft) 50 50 <br /> Gal/c f Conversion 75 75 <br /> UGal Conversion 3 785 3 785 <br /> Avg TPH Conc 500 14,000 <br /> Mass Conversion 0000000001 0000000001 <br /> TPH Mass 85705 244397 <br /> Total TPH-G Mass (Kilograms) 330101 <br /> w <br /> TPH Mass =Area x porosity x g w thickness x 7 5 gallc f x 3 785 Ugal x avg TPH cont x 1 E-9 kg/ug <br /> 1 <br />