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IAdsorbed Volume-Mass Calculations <br /> MSP NAVY-2191 Navy Drive, Stockton, Ca <br />' Assumptions <br /> Utilizing Figures 2 and 6,the hydrocarbon distribution on the site can be approximated by five <br />' contoured areas The volume of the areas can be approximated utilizing elliptic cones and a <br /> sphere <br />' The volume of an cone can be calculated by the formula <br /> ;s'un <br /> Ve��(Icr21/2h), "r" is the radius of the cone and"h"is the height of the cone <br /> The volume of a sphere can be calculated by-the formula <br /> V-�-T 41rr`�, wherc"r" is the radius of the sphere <br /> ante++wl' <br />' 1) Impacted soil at P3, elliptic cone (2 75 mg/kg average concentration) r N 8 ft, h = 12 5 ft <br /> 2) Impacted soil at P9, elliptic cone (4 1 mg/kg ave concentration) r = 14 ft, h = 23 ft <br /> 3) Impacted soil at MW-6, a sphere (1 2 mg/kg ave concentration) r z 3 ft <br /> 4) Impacted soil at Tank 6 south, elliptic cone (270 mg/kg ave concentration) r 5 ft, h Z 10 ft <br /> 5) Impacted soil at Tank 6 north, elliptic cone (43 mg/kg average concentration) r Z 3 ft, h Z 10 ft <br />' The average TPH-g concentration in each zone was estimated by adding all soil samples within the <br /> selected area and dividing by the total number of samples The two average concentrations(reported <br /> as milligrams per kilogram, mg/kg) were as follows 2 75 mg/kg (2 75x 10^-6) cone 1, 4 1 mg/kg <br /> (4 1x10^-6) cone two, 1 2 mg/kg (1 2x10^-6) sphere, 270 mg/kg (2 7x1011-4) cone four and 43 <br /> mg/kg (4 3x10^-5) cone five <br />' 1) Approximate volume of petroleum hydrocarbon impacted soil in cone # 1 (Vj <br />' Va= (3 14)(8 ft)2(1/2(12 5 ft)) 41,256 64 ft3 (lyd3/27ft) z 46.5 yd <br /> Converting 46 5 yd3 to cm3(i e lyd3=764,555 CM)yields approximately 35,551,807 5 cm3 Using <br /> 16 g/cm3 as the weight of soil,the total weight of contaminated soil is approximately 56,882,892 g <br /> Using the 2 75 mg/kg as the"average"concentration of gasoline in the cone,the volume of gasoline <br /> 1S <br /> weight of soil• average concentration -+ 56,882,892 g•2 75x10^-6= 156 42 g of gasoline <br /> i <br /> Converting grams of gasoline to volume of gasoline (gallons) using density of gasoline to equal <br /> 0 75 g/cm3 <br /> 156 42 g of gasoline—0 75 g/cm3 =208 57 cm3 <br /> 20857 cm3 • (1 gallon— 3,785 cm3) � 0.055 gallons of gasoline <br /> Advanced GeoEnvironmenta+,Inc <br /> c1t <br /> r <br />