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Mass of Contaminants Remaining in Groundwater <br /> Impacted Interval Average Plume Thickness Porosity Impacted Specific Gravity Mass of <br /> clay =0 50 Conversion Volume of Average TPHg TPHg =0 90 Conversion Dissolved <br /> Length Width Depth to Water Plume Depth sand=0 32 Factor(gal Water Concentration MTBE =074 Factor(Ibs TPHg <br /> (ft) (ft) (ft bgs) (ft bgs) silt =0 42 per cf (gallons) or b Benzene=0 87 pergallon) (lbs) <br /> 1 23716 401 60 041, 748 1454645 330 09 B 34 360312552 <br /> Impacted Interval Average Plume Thickness Porosity Impacted Specific Gravity Mass of <br /> clay =0 50 Conversion Volume of Average Benzene TPHg =0 90 Conversion Dissolved <br /> Length Width Depth to Water Plume Depth sand=0 32 Factor(gal Water Concentration MTBE =0 74 Factor(lbs TPHg <br /> (ft) (ft) (tt bgs) (ft bgs) silt =0 42 per c (gallons) or b Benzene=0 87 pergallon) Ibs <br /> 1 171251 40 601 041, 748 1050379 32251 09 834 25 4263669 <br /> ---------- <br /> Impacted Interval Average Plume Thickness Porosity Impacted specific Gravity Mass of <br /> clay =0 50 Conversion Volume of Average Benzene TPHg =0 90 Conversion Dissolved <br /> Length Width Depth to Water Plume Depth sand=0 32 Factor(gal Water Concentration MTBE =0 74 Factor(lbs MtBE <br /> (ft) (ft) (tt bgs) (ft bgs) silt =0 42 per c (gallons) or b Benzene=0 87 per gal Ion Ibs <br /> 1 77631 40 601 0411 748 1 476151 1 1951 087 1 8 34 0 67369752 <br /> Impacted Interval Average Plume Thickness Porosity Impacted Specific Gravity Mass of <br /> clay =0 50 Conversion Volume of Average Benzene TPHg =0 90 Conversion Dissolved <br /> Length Width Depth to Water Plume Depth sand=0 32 Factor(gal Water Concentration MTBE =0 74 Factor(Ibs MtBE <br /> (ft) (ft) (ft bgs) (ft bgs) silt =0 42 per (gallons) or b Benzene=0 87 pergallon) Ibs <br /> 1 2714 40 60 041, 748 1 166466 1900 0 87 1 834 2 29490228 <br /> bgs =below ground surface lbs =pounds <br /> cf =cubic feet MtBE =methyl tent-butyl ether <br /> ft =feet pg1L =microgram per liter <br /> gal =gallon ppb =part per billion <br />