Laserfiche WebLink
4 ' <br /> HYDROCARBON-IMPACTED SOIL <br /> rr VOLUME ASSUMPTIONS AND CALCULATIONS <br /> L <br /> Volume of impacted soil left in place in the vicinity of the former gasoline UST: <br /> An estimate of the areal extent of impacted soil surrounding the eastern portion of the former UST <br /> area is made from samples collected from borings B-1 and B-2 and the over-excavation of August <br /> 1995. Based on the distance between the borings, a distance of 7.5 feet is utilized as an `average' <br /> radius of the hydrocarbon plume for the following calculation. The vertical distribution of the <br /> impacted soil appears to be between 5 and.15 feet in depth bsg. <br /> Vg = 7cr2 •h -+ Tc(7.5ftz) • 10 ft 1767 ft' = 65 yd' <br /> 0 <br /> Converting 65 yd'to cm3 yields approximately 7.9 x 10'cm3. Using 1.5 gkm3 as the weight of soil, <br /> the total weight of contaminated soil is approximately 8.9 x 10'grams. <br /> LUsing 720 parts per million as the "average" concentration of total petroleum hydrocarbons <br /> quantified as gasoline from 5 feet bsg to 15 feet bsg, the mass of gasoline is: <br /> 10 <br /> weight of soil • average concentration -+ 8-9 x 10' ge0 x 10-4 g)= 660 04 g of gasoline <br /> r Converting grams of gasoline to volume of gasoline (gallons) using density of gasoline to equal <br /> L; 0.75: 010 <br /> � v d <br /> 6A x 104 g of gasoline_ 0.75g/cm3 = 8.5 x 104 cm3 <br /> 8.5 x 104 cm3 • (1 gallon_ 3,785 cm3 2.2 x 10' gallons of gasoline <br /> �o <br /> . 0 <br />