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ESTIMATION OF PETROLEUM HYDROCARBONS <br /> EXISTING IN SOIL PRIOR TO REMEDIATION <br /> Beacon Station No. 696 <br /> ' 2448 West Kettleman Lane <br /> Lodi, California <br /> ' Assumptions. <br /> 1. Inferred lateral and vertical extent of impacted soil is illustrated on Figures 6 and 7. <br /> 2. Average weight per cubic foot of soil=110 lbs/cubic foot. <br /> 3. Impacted soil as indicated on Figures 6,7,and 8. <br /> 4. For borings with multiple soil samples in an interval,the highest concentration was utilized for <br /> calculation purposes. <br /> Layers Vertical Interval <br /> A 0-9 feet <br /> B 10-19 feet <br /> C 20-29 feet <br /> D 30-39 feet <br /> E <br /> 4049 feet <br /> ' 5. Each layer is divided into 1-3 concentric volumes of average concentrations. The inferred extent of <br /> the concentric volumes are illustrated on Figure 8. <br /> 6. Estimated impacted area prior to remediation is based upon soil samples collected during drilling <br /> activities conducted between 1985 through 1996. <br /> 7. Pounds of petroleum hydrocarbons=(volume)(average weight per cubic foot)(ppmilEE6). <br /> 8. n:3.14159 <br /> s <br />