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. I <br /> t li <br /> HYDROCARBON-IWACTED SOIL <br /> VOLUME ASSUMPTIONS AND CALCULATIONS <br /> Volume of remaining impacted soil in the vicinity of the former gasoline UST <br /> Vg=1tr2•h -! n(5ft2) • 10 ft 785 ft' �'.29 yd' <br /> ii <br /> Converting 29 yd3 to cm3 yields approximately 2.22 x 10'cm3. Using 1.5 glcm' as the weight of soil, <br /> �i the total weight of contaminated soil is approximately 3.33 x 10'g. <br /> Using 10,800 parts per million as the"average" concentration df gasoline from 5 feet bsg to 15 feet <br /> L bsg, the volume of gasoline is: <br /> i II <br /> weight of soil•average concentration -4 3.33 x 10'g • 0.0108u =3.59 x 105 g of gasoline(TPH-g) <br /> ik <br /> li <br /> Converting grams of gasoline to volume of gasoline(gallons)using density of gasoline to equal 0.75: <br /> 3.59 x 105 g of gasoline. 0.75g/cm' 4.79 x 196 cm' ' <br /> i' <br /> 4.79 x 196 cm3 • (1 gallon 3,785 cm3) = 126.5 gallons of gasoline <br /> f <br /> Volume of impacted soil remaining in the vicinity of the former heating oil UST.- <br /> rr Vo= 7Lr2•h —► 7E(IOft2) • 20 ft = 6283 ft3 =I'233 yd <br /> L <br /> i <br /> lConverting 233 yd3 to cm3yields approximately 1.78 x 108 cm3. Using 1.5 g/cm3 as the weight of soil, <br /> the total weight of contaminated soil is approximately 2.67 x 108 g. ' <br /> Using 4,000 parts per million as the average concentration of heating oil from 5 feet bsg to 25 feet <br /> bsg, the volume of gasoline is.- <br /> weight <br /> s:weight of soil • average concentration ->'2.67 x 108 g •0.0040 =I 1.07 x 106 g of heating oil (TPH-d) <br /> IJ <br /> Converting grams of heating oil to volume of heating oil(gallons)using idensity of heating oil to equal <br /> 0.87: it I <br /> 1.07 x 106 g-0.87g/cm3 = 1.23 x 106 cm3 <br /> I <br /> 1.23 x 106 cm3 • (1 gallon_3,785 cm3) 324.2 gallons of heating oil <br /> ,: <br /> I <br /> 1� _ <br />