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ESTUWATION OF PETROLEUM HYDROCARBONS <br /> EXISTING IN SOIL, PRIOR TO REMEDIATION-Continued <br /> Beacon Station No 695 <br /> 900 South Cherokee Lane <br /> Lodi, California <br /> II. Estimation of benzene existing m soil prior to remediation <br /> Assumptions: <br /> 1 On borings that had a TPH as gasoline concentrations and benzene indicated below the <br /> detection limit. The detection limit was used for benzene calculations <br /> (A) Layer A (0-9 feet) <br /> 1 Pounds of benzene (Volume 1) <br /> C = 4 ppm + 2 6 ppm <br /> 2 <br /> C = 3 3 pgin <br /> = a (20) (42 5) (10) (110 Ibs 3 3 ppm <br />. ft} 1 x 106 <br /> 9 7 lbs <br /> 2 Pounds of benzene (Volume 2) <br /> C = 0 052pm <br /> _ ((27.5) (47 5) -- (20) (42.5)) (10) 110 lbs 0.05 PPM <br /> ff3 1 x 106 <br /> 0 08 lbs <br /> 3 Pounds of benzene (Volume 3) <br /> C = 0 005 Qpm <br /> MSoo2 915 <br />