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MASS CALCULATIONS -SOIL <br /> Universal Forest Products <br /> Thornton,California <br /> Vol of Excavated Soil 687 tors ' <br /> Estimated Volume of 35 tons <br /> Residual Petroleum- <br /> Affected Soil <br /> Average <br /> Contaminant Concentration Weight Capacity <br /> (ppm) (tons) (lbs) (gallons) <br /> Intial TPHd 1,750 1.20 2,405 359 <br /> Residual TPHd 473 0,02 33 5 <br />