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MASSNOLUME OF TPH-g IN GROUND WATER <br /> Tracy Marine Sales <br /> 2353 Taste Road, Tracy, California <br /> VOLUME CALCULATIONS <br /> Approximate areal distribution (from drafting software)= 10,000 square feet <br /> Approximate vertical extent=vertical column of water in shallow screened wells 12 feet* <br /> Approximate area of TPH-g-impacted ground water= 120,000 cubic feet (ft') <br /> Average porosity of soil = 20% <br /> Volume of TPH-g-impacted ground water=(120,000 ft' x 0.20) = 24,000 ft' <br /> 24,000 ft3 x 7.48 gallons/ft' = 180,000 gallons =681,000 liters impacted water <br /> 3 <br /> MASS CALCULATIONS <br /> i <br /> i <br /> Volume of contaminated water= 681,000 liters <br /> Average concentration of TPH-g in ground water= 12,125 micrograms per liter* <br /> Mass of contaminants =volume of contaminated water x average concentration of TPH-g. <br /> 681,000 liters impacted ground water x 12,125 micrograms/liter= 8.26 kilograms (kg) TPH-g <br /> 8.26 kg TPH-g= 18.2 pounds or approximately 3 gallons TPH-g <br /> *Based on data collected during July 2003 ground water monitoring event <br /> it <br /> 4 <br /> r <br /> If <br /> F <br />