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1 HYDROCARBON (DIESEL)-IMPACTED SOIL <br /> VOLUME ASSUMPTIONS AND CALCULATIONS <br />' Grant Line Gas & Food <br /> 2420 Grant Line Road, Tracy, California <br />' Assumptions <br /> Based on Figures 5, 6 and 7, the volume of diesel-impacted soil at the site can be approximated as <br />' follows <br /> Lateral extent of impacted soil =25,153 ft' <br />' Average thickness of impacted soil= 8 feet <br /> Approximate volume of impacted soil =201,224 ft3 = 7,453 yd <br />' Calculations <br />' The average total petroleum hydrocarbons quantified as diesel(TPH-d)concentration was estimated <br /> by adding TPH-d concentrations and dividing by number of samples The concentrations averaged <br /> to 152 mg/kg which is equivalent to 0 000152 grams <br />' Converting 7,453 yd to cm3(i e l yd =764,555cm3)yields approximately 5,698,029,100 cm3 Using <br /> 1 5 g/em' as the weight of soil, the total weight of contaminated soil is approximately <br />' 8,547,043,7008 <br /> Using the 0 000152 grams as the "average" concentration of TPH-d in the inner sequence, the <br />' volume of diesel is <br /> weight of soil a average concentration —f� 8,547,000 g • 0 000152 = 1,299,200 g of diesel <br />' Converting grams of petroleum to volume of petroleum (gallons) using density of diesel (0 85 <br /> ) <br />' 1,299,200 g of diesel -- 0 85 g/cm3 = 1,528,400 cm3 <br /> 1,528,400 cm3 • (1 gallon—3,785 cm3) = 400 gallons of diesel <br /> I <br /> i <br /> IAdvanced GeoEnvironmental,Inc <br /> I <br />