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Adsorbed MTBE Mass-Volume Calculations <br /> PACIFIC PRIDE - WEST LANE <br />' 3230 North West Lane, Stockton CA <br /> Assumptions <br /> 1 Utilizing Figures 6,9 and 12,the mass distribution of gasoline concentrations on the site can be approximated <br /> utilizing the equation for a half-coned shape for MTBE-impacted areas 1, 3 and 4, a half-cylinder shape can <br />' be used for area no 2 <br /> The volume for a half-cone shape can be calculated by the formula <br /> VCO1e=(113 7[r2h)/2,where `r' is the radius of the cone, `h' is the height of the cone <br />' For the estimated cone shape of area no 1 r = 4 ft and h = 18 ft <br />' For the estimated cone shape of area no 3 r = 5 ft and h = 11 ft <br /> For the estimated cone shape of area no 4 r = 2 ft and h = 5 ft <br />' The volume for a half-cylinder can be calculated by the formula <br /> VcYj.,r=(n • h)/2, where `r' is the radius of the cylinder, `h' is the height of the cylinder <br /> For the estimated cone shape of area no 2 r z 10 ft and h = 34 ft <br /> The average MTBE concentration was utilized for MTBE impacted areas 1, 2, 3 and 4, the average was calculated by <br /> summing the detected MTBE concentrations for each MTBE-impacted area and dividing by the total number of <br /> detections The average MTBE concentration for MTBE-impacted area no 1 was calculated to be 1 8 milligrams per <br /> kilogram(mg/lig), 5 5 mg/kg for MTBE-impacted area no 2,4 1 mg/kg for area no 3 and 0 037 mg/kg for area no 3 <br /> MTBE-IMPACTED/ i) <br /> AREA NO 1) Approximate volume of MTBE-Impacted soil (VM,,,,o <br /> 0 <br /> VMTEENO ] = 047)(4 ft)Z(18 ft)/2 4 151 ft3 (Iyd'/27ft) = 5 6yd3 <br /> I Converting 5 6 yd'to em}(i e 1 yd3=764,555cm3)yields approximately 4,281,508 cm} Using 1 9 g/cm3 as the weight <br /> of soil, the total weight of contaminated soil is approximately 8,134,865 g <br /> Using 1 8 mg/kg as the"average"concentration in the area of MTBE-impacted soil,the mass can be calculated to be <br /> 1 weight of soil•average concentration -i 8,134,865 g •0 0000018 = 14 6 g of MTBE <br /> Converting grams of MTBE to volume of MTBE(gallons)using density of MTBE equal to 0 74 (estimate) <br /> 146gofMTBE—074g/cm'= 1979 cm3 <br /> 19 79 cm3 •(1 gallon—3,785 cm') = 0 005 gallons of MTBE <br /> Converting gallons of MTBE to pounds of MTBE yields <br /> I0 005 gallons of gas—0 16 gal(estimate)of gas/lbs of gas = 0 033 pounds of MTBE <br /> �1 <br /> Advanced GeoEnvironmental,Inc <br /> I <br />