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a <br /> Table 2. Estimated MTBE Mass Remaining in Groundwater-Shell-branded Service Station,2375 West Grantline Road,Tracy,CA <br /> SYMBOLS AND DESCRIPTIONS UNITS >1 to<10 >10-to<100 X100 contour <br /> contour interval contour interval interval <br /> A=Area of impacted groundwater square feet 15,925 6,425 15,950 <br /> T=Thickness of impacted groundwater feet 15 15 15 <br /> VWater=Volume of impacted groundwater cubic feet 238,875 96,375 239,250 <br /> VWater=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 14091,623 2,709,943 <br /> Concentration in groundwater u 5 50 285 <br /> mg 1.35E+04 5.46E+04 7.72E+05 <br /> M=Hydrocarbon mass in groundwater kg 0.01 0.05 0.77 <br /> lbs 0.03 0.12 1.70 <br /> V=Volume remaining in groundwater liters 0.02 0.07 1.04 <br /> _. .. .._ .. allons. 0.00 0.02 0.28 <br /> Estimated Pounds Remaining in Groundwater 1.85 <br /> Estimated Gallons Remainhig 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=ft3 x 7.4806 <br /> 3. Hydrocarbon density(kg/liter): 0.74 Porosi =0.4 <br /> i <br />