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1 <br /> Petroleum hydrocarbons rernatmng = 16 mg/kg x 1x10 kg/mg x 1451 ft3 <br /> x 114,3 90 ft3 <br /> = 265 lbs of petroleum hydrocarbons as TPHD remaining between <br /> 30 to 61.5 feet bgs <br /> Based on the results of the investigations and using conservative TPHG and TPHD <br /> concentrations, EMCON has esturlated that approxnmately 10,390 pounds of TPHG and <br />' 8,331 pounds of TPHD are present beneath the site <br /> 1 <br /> r <br /> SAC\N\PI0\0805\08051420 4BS 97\prz I Rev o 3112/97 <br /> 20805142 004 6-4 <br />