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' Adsorbed Mass-Volume Calculations
<br /> . PACIFIC PRIDE WEST LANE - 3234 North West Lane, Stockton, CA
<br /> IAssumptions
<br />' Utilizing Figures 13, 14 and 15,the mass distribution of total petroleum hydrocarbon concentrations on the site
<br /> can be approxnmated utilizing equation for coned ellipsoid
<br /> The area of an coned ellipse can be calculated by the formula
<br />' V,,=(long diam)(short diam.)(0 7854)(1/3 height),where"a"is the long diameter ofthe coned ellipse,
<br /> "b"is the short diameter and"c"is the height
<br />' 1)Utilizing Figures 13, 14 and 15 a = 63 ft,b = 36 ft, and c = 35 ft
<br /> Approximate volume of petroleum hydrocarbon impacted soil in inner sequence(Vr)
<br /> iVI=(63 ft)(36 ft)(0 7854)(1/3 35 ft) -+ 20,782 ft' (1yd3/27ft') � 770 yd
<br /> 2)The average TPH-g(gasoline)concentration was estunated by adding all detected TPH-g concentrations and dividing
<br /> by the number of detected analytes The average TPH-g concentrations(reported as milligrams per kilogram, mg/kg)
<br /> were as follows from lughest to lowest 60 mg/kg,20 mg/kg,4 2 mg/kg, 1 9 mg/kg,these concentrations average to 21 5
<br /> mg/kg which is equivalent to 0 00002150 g
<br /> The average TPH-d(diesel)concentration was estimated by adding all detected TPH-d concentrations and dividmg by
<br /> the number of detected analytes The average TPH-d concentrations(reported as milligrams per kilogram,mg/kg)were
<br /> as follows from highest to lowest 110 mg/kg, 15 mg/kg, 1 3 mg/kg, 1 3 mg/kg, 2 mg/kg and 1 6 mg/kg, these
<br /> I S, concentrations average to 21 9 mg/kg which is equivalent to 0 00002190
<br /> Converting 770 yd to cm3(1 e 1 yd3=764,600cm3)yields approximately 588,742,000 cm3 Using 1 5 g/cm3 as the weight
<br />' of soil,the total weight of contaminated soil is approximately 883,113,000 g
<br /> Using 21 50 mg/kg as the"average"gasoline concentration in the area of contaminated soil,the volume of gasoline is
<br /> Iweight of soil-average concentration -4 883,113,000 g •0 00002150=18,987 g of gasoline
<br /> Converting grams of gasoline to volume of gasoline(gallons)using density of gasoline(0 74)
<br /> 18,987 g of gasoline-0 75 g/cm3=25,316 cm3
<br /> 25,316 cm3 •(1 gallon-3,785 cm3) = 6.69 gallons of gasoline
<br /> Using 21 90 mg/kg as the"average"diesel concentration in the area of contaminated soil, the volume of diesel is
<br /> weight of soil • average concentration -4 883,113,000 g •0 00002190=19,340 g of diesel
<br /> Converting grams of diesel to volume of diesel(gallons)using density of diesel(0 84)
<br /> 19,340 g of diesel-0 84 g/cm3=23,024 cm3
<br /> 23,024 cm3 •(1 gallon-3,785 cm3) = 6 08 gallons of diesel
<br /> �)1 Advanced GeoEnvironmental,Inc
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