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f ' <br /> f <br /> APPENDIX E <br /> VOLUME/MASS ASSUMPTIONS AND CALCULATIONS <br /> REMOVED HYDROCARBONS . <br /> Based on the average hydrocarbon concentration of TPH-g in soil samples recovered from the <br /> excavation area and soil samples collected from soil borings in the area of the excavation during <br /> previous site assessments, the following calculation for the removed petroleum hydrocarbons has <br /> been made. <br /> Assumptions <br /> A total of 698 tons of impacted soil was excavated and transported off-site for disposal; landfill <br /> weight tags were used to determine the mass of soil removed. The average concentration of TPH-g <br /> in impacted soil samples collected during excavation was estim6ted at 200 milligrams/kilogram. <br /> E <br /> Calculations <br /> 698 tons TPH-g-impacted soil x 2,000 pounds/ton= 1,396,000 pounds (lb)TPH-g-impacted soil <br /> 1,240,000 lb TPH-g-impacted soil x 200 mg/kg TPH-g=279111 gasoline <br /> 279 lb gasoline-6.25 lb/gal =45 gal gasoline <br /> F <br /> F <br /> i <br />