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Table 2. Estimated MTBE Mass Remaining in Groundwater-Shell-branded Service Station,2375 West Grantline Road,Tracy,CA <br /> >1 to<10 >10 to<100 >100 contour <br /> SYMBOLS AND DESCRIPTIONS UNITS contour interval contour interval interval <br /> A=Area of impacted goundwater square feet 15,925 . 6,425 15,950 <br /> T=Thickness of impacted groundwater feet 15 15 15 <br /> V,,,,,a=Volume of impacted groundwater cubic feet 238,875 96,375 239,250 <br /> Vwata volume corrected for formation porosity(0.4) cubic feet 95,550 38,550 95,700 <br /> gallons 714,771 288,377 715,893 <br /> Total liters of impacted groundwater, liters 2,705,695 1,091,623 2,709,943 <br /> Concentration in groundwater u 5 50 285 <br /> Ing 1.35E+04 5.46E+04 7.72E+05 <br /> M=Hydrocarbon mass in groundwater k 0.01 0.05 . 0.77 <br /> lbs 0.03 0.12 1.70 <br /> liters 0.02 0.07 1. <br /> 04 <br /> V=Volume remaining in groundwater <br /> allons 000 0.02 0.2828 <br /> Estimated Pounds Remaining in Groundwater 1.85 <br /> Estimated Gallons Remaining in Groundwater 0.30 <br /> NOTES EQUATIONS <br /> 1. Groundwater has been corrected for formation porosity. A=by drafting program <br /> 2. Concentrations are represented by the concentrations that <br /> occurred within the specified contour interval. Gallons=f?x 7.4806 <br /> 3. Hydrocarbon density(kg/liter): 0.74 Porosity=0.4 <br />