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1 <br /> . Adsorbed Volume - Mass Calculations <br /> CHAPIN BROTHER INVESTMENTS, INC 1766 Monte Diablo Avenue <br /> Stockton, California <br /> Assumptions <br /> Utilizing Figures 2, 3 and 4, the mass distribution of total petroleum hydrocarbon <br /> concentrations on the site can be approximated utilizing equation for two volumetric <br /> calculations a rectangle and triangle with a volumetric thickness added to each The triangle <br /> represents of the eastern edge of the soil plume, while the rectangle represents the western <br /> volume of impacted soil <br /> The volume of the a triangle shaped wedge can be calculated by the formula <br /> V tri=(base of the triangle)(%a height), where"h"is the percendicular measure from <br /> the base of the triangle to apex of the tnangle,"b"is the longest measurement <br /> of the triangle and the thickness of impacted soil modeled as ten feet thick <br /> The approximate volume of a triangle can be calculated by the formula <br /> Vtn = (75 ft)(]/, 35 ft)(10 ft)= 11,250 ft3 <br /> The area of an rectangle can be calculated by the formula <br /> V1eC= (long dram )(short diam )(height), where "a" is the long diameter, "b" is the <br /> short diameter and "c" is the thickness of impacted soil modeled as ten feet <br /> thick Utilizing Figures 3, 4 and 5 a z 60 ft, b z 30 ft, and c = 10 ft <br /> The approximate volume of a rectangle can be calculated by the formula <br /> Vrec= (60 ft)( 30 ft)(10 ft) = 18,000 ft' <br /> The sum of the volume of soil is approximately 29,250 ft , which is then � converted to cm3 <br /> pp Y <br /> 29,250 ft3 x 28,320 cm3/ ft' = 828,360,000 crn3 <br /> 828,360,000 cm3 which is then —§� converted to grams <br /> 828,360,000 cm3 x 1 6 grams /cm3 = 132,576,000 grams <br /> The sum of the volume of soil is 132,576,000 grams <br /> Advanced GeoEnvironznental,Inc <br />