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w w w w w w w w �tw w w� w ■w� w +I■Iw� ■■wr <br /> Table E-1 <br /> Mass of Contaminants Remaining in Groundwater <br /> Plume Dimensions Porosity <br /> Clay=0 50 Average Contaminant Conversion Conversion <br /> Year/ Length Width Thickness Sand=0 32 Concentration Factor 1 Factor 2 Mass <br /> Contaminant (feet) (feet) (feet) Silt=0 42 OWL) (L/ft3) (lbs/,ug) (lbs) <br /> 2006 <br /> MtBE 8 8 10 0 32 0 6 2832 45O,000,000 000291 <br /> Notes <br /> Calculation of Mass=(Length x Width x Thickness x Porosity x Average Contaminant Concentration x Conversion Factor 1)/Conversion Factor 2 <br /> Plume thickness estimated at maximum of 10 feet thickness <br /> ft3 = cubic feet <br /> L = liter <br /> lbs — pounds <br /> MtBE — methyl tert-butyl ether <br /> Ag = micrograms <br /> K Mprocesslf5 BP ARCO1060201CIosure Rpts\Text 2_16_06 doc <br />