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APPENDIX E <br /> SOIL MASS BALANCE CALCULATION <br /> Based on the assumption presented in the section entialed Soil Mass Balance Calculations, <br /> the mass of contaminant can be calculated using the following equation <br /> Ifigh C1 + C2 <br /> 1 <br /> E (Al— A2) 2 !I(T)(1—r7)(pd} = Mass contaminant in Soil <br /> Low <br /> Al 3450 Area of outer isoconcentration area fe <br /> A2 Area of inner isoconcentration area ft <br /> C1 240 Concentration of outer isoconcentration mg/kg <br /> C2 Concentration of inner isoconcentration mg/kg <br /> T 85 Plume Thickness ft <br /> —4-rt- 035 q-n Solids x.11"4 <br /> pd 1 55 Particle Density g/cm3 <br /> 221 01 lbs of 11TOtal xylenes <br /> Chevron 9-2033 <br /> • <br />