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14W _WK <br /> APPENDIX C <br /> MTBE and TPH-g-IMPACTED SOIL <br /> VOLUME ASSUMPTIONS AND CALCULATIONS <br /> CALIFORNIA STOP - 2224 Manthey Road, Stockton, California <br /> Conversion factors: <br /> 1 gallon (gal) of MTBE weighs 6.19 pounds (Ibs) <br /> 1 gal of TPH-g weighs 6.25 lbs <br /> Typical weight of soil = 100 lbs / ft3 <br /> 1 milligram per kilogram (mg/kg) = 0.000001 grams(g)/milliliter(ml) <br /> *A ml is very nearly equivalent to a cubic centimeter of water, which by <br /> definition equals one gram, this concentration is nearly a unitless number. <br /> Volume Weight Average Concentration Mass/Volume Calculations <br /> Zone Soil Soil MTBE MTBE <br /> ft lbs mg/kg g/ml lbs gal <br /> dA 7,234 723,400 195 0.000195 141.06 or 22.79 <br /> dB 2,288 228,800 5 0.000005 1.14 or 0.18 <br /> outer 172,440 17,244,000 2.5 0.0000025 43.11 or 6.96 <br /> Total Adsorbed MTBE: 185 or 30 <br /> pounds gallons <br /> Volume Weight Average Concentration Mass/Volume Calculations <br /> Zone Soil Soil TPH-g TPH-g <br /> ft3 lbs mg/kg g/ml lbs gal <br /> dA 7,234 723,400 6,700 0.0067 4,846.78 or 775.48 <br /> dB 6,091 609,100 2,135 0.002135 1,300.43 or 208.07 <br /> outer 100,780 10,078,000 10 0.00001 100.78 or 16.12 <br /> Total Adsorbed TPH-g: 6,248 or 1,000 <br /> pounds gallons <br /> Advanced CeoEnvironmenlal,Inc. <br />