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ESTIMATION OF PETROLEUM HYDROCARBONS <br /> EXIS'T'ING IN SOIL PRIOR TO REMEDIATION <br /> Beacon Station No 695 <br /> 900 South Cherokee Lane <br /> Lodi, California <br /> Assumptions: <br /> 1 Inferred lateral and vertical extent of impacted soil is illustrated on Figures 10, 11, 131 <br /> 15, and 16 <br /> 2 Average weight of per cubic foot of soil = 110 ibs/e <br /> 3 Impacted soil was divided into 7 layers (10-foot intervals) <br /> Layers. Vertical Interval <br /> A 0-9 <br /> B 10-19 <br /> C 20-29 <br /> D 30-39 <br /> E 40-49 <br /> F 50-59 <br /> G 60-69 <br /> 4 For borings with multiple soil samples in an interval, the highest concentration was <br /> utilized for calculation purposes <br /> 5 Each layer is divided into 2-3 concentric volumes of average concentrations The <br /> inferred extent of the concentric volumes are illustrated on Figure 25 <br /> 6 Estimated impacted prior to remediation is based on soil samples collected during drilling <br /> activities conducted between 1987 through 1994 <br /> 7 Pounds of petroleum hydrocarbons = (volume)(average weight per cubic <br /> fo0t)(ppm/1XI(6) <br /> (ppm = parts per million) <br /> MS002 915 <br />