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W APPENDIX E <br /> SOIL MASS BALANCE CALCULATION <br /> Based on the assumption presented in the section entiitled Soil Mass Balance Calculations, <br /> the mass of contaminant can be calculated using the following equation <br /> Nigh C1 + C 2 <br /> (Al— A2) 2 (T)(1 --n}(pd) w Mass contaminant in Soil <br /> LOW <br /> Al 3450 Area of outer isoconcentration area ft <br /> A2 Area of inner isoconcentration area ft2 <br /> C1 14 Concentration of outer isoconcentration mg/kg <br /> C2 Concentration of inner isoconcentration mg/kg <br /> T 85 Plume Thickness ft <br /> AA n 035 1-0,35-o-`&lids <br /> pd 155 Particle Density g/cm3 <br /> • <br /> 1291 lbs of 11 Benzene <br /> Chevron 9-2033 <br />