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ESTIMATION OF PETROLEUM HYDROCARBONS <br /> EXISTING IN GROUND WATER AFTER REMEDIATION <br /> • (Based on first quarter 1996 monitoring) <br /> Beacon Station No 695 <br /> 900 South Cherokee Lane <br /> Lodi, California <br /> Assam tsons• <br /> 1 For ground water samples that contained TPH as gasoline concentrations with benzene <br /> concentrations below the detection limit The detection limit for benzene was used for <br /> calculations <br /> II. Estvmation of benzene existing in ground water after remediation (Zone 1) <br /> (A) Zone 1 <br /> (1) Layer 1 (Volume 1) <br /> C = 0 5 nvb <br /> (6.25) (12 5) (2.5) (0 40) 7 48 gallons 8 34 lbs OS ppb <br />• 1 ft3 1 gin 1 x 109 <br /> — 0 000048 lbs <br /> (2) Layer i (Volume 2) <br /> C = 05ppb <br /> _ >z ((12.5) (25) - (6.25' (12.5)) (2.5) (0.40) 7.48 gallons 8 34 lbs 4 5 ppb <br /> 1 fr3 1 gallon 1 x 109 <br /> = 0 00402 lbs <br /> Total pounds for Zone 1 (Layer 1) = 0 000008 lbs + 0 00002 lbs = 0 000028 lbs <br /> MS002 915 <br />