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1 <br /> ESTIMATION OF PETROLEUM HYDROCARBONS <br /> ' EXISTING IN SOIL AFTER REMEDIATION <br /> Beacon Station No.696 <br /> ' 2448 West Kettieman Lane <br /> Lodi, California <br /> ' Assumptions: <br /> 1. Inferred lateral and vertical extent of impacted soil is illustrated on Figures 9, 10 and 12. <br /> ' 2. Average weight per cubic foot of soil= 110 lbs/cubic foot. <br /> 3. Impacted soil as indicated on Figures 9, 10,and 12. <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 15-25 feet <br /> B 25-35 feet <br /> C 3545 feet <br /> ' D 45-55 feet <br /> ' 5. Each layer is divided into 1-2 concentric volumes of average concentrations. The inferred extent of <br /> the concentric volumes are illustrated on Figure 12. <br /> ' 6. Estimated impacted area after remediation is based upon soil samples collected during drilling <br /> activities conducted in 1994. <br /> ' 7. Pounds of petroleum hydrocarbons=(voiume)(average weight per cubic foot)(ppm/1EE6). <br /> S. x.3.14159 <br /> a <br /> l <br /> 1 <br />