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wells were drilled. Weathering, aeration and bioremediation <br /> occured during that time frame. <br /> 9. The final contamination concentrations in the soil is <br /> estimated to follow a like pattern as that reduction which <br /> occured in the groundwater during the same period. The highest, <br /> lowest and average, in parts per million, (PPM) are denoted in <br /> Table C. <br /> 10. The values calculated are reported as significant values. <br /> 11. No Oxygenates were detected in the soil samples. <br /> TABLE C <br /> Final concentrations of Contaminants Reported in PPM <br /> MATTER SOIL CONC WATER CONC <br /> HIGH LOW AVERAGE HIGH LOW AVERAGE <br /> TPHG 135 0 68 0.0 0 0.0 <br /> B 0. 27 0 .0. 14 .006 0 .003 <br /> T 0 . 18 0 0.09 0.0 0 0.0 <br /> E 0. 75 0 0.38 .0011 0 .0005 <br /> 1-X "-0. 15 0 0.08 .0001 0 .00005 <br /> MTBE 0 0 0 .0043 0 .0022 <br /> B. CALCULATIONS <br /> 1. SOIL <br /> a Original Mass Contaminants = Concentration x density x <br /> volume <br /> 1. TPHG 270/106 x 43lbs/ft3 x 150,00oft3 = 1863 pounds <br /> 2. Benzene .27/106 x 56lbs/ft3 x 150,000ft3 = 2.27 pounds <br /> 3. Toluene . 18/106 x 56lbs/ft3 x 150'000ft3 = 1.51 pounds <br /> 4. Ethyl B . 75/106 x 561bs/ft3 x 150'000ft3 = 6 .3 pounds <br /> 11 <br />