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CLEARWA- TER <br /> • G R O U P I N C <br /> Envo ronmenta[ Serxeres <br /> Attachment 3 <br /> 4555 North Pershing Avenue, Stockton <br /> Calculation of Residual Hydrocarbons in Soil <br /> Interval Thickness Average TPH Volume of Gasoline <br /> of Interval Concentration Present (gals.) <br /> 1 (12-14) 2 6200 7 <br /> 2 (14-16) 2 1600 2 <br /> 3 (16-18) 2 510 1 <br /> 4 (18-20) 2 0 0 <br /> 5 (20-22) 2 450 1 <br /> 6 (22-25) 3 137 0 <br /> 11 <br /> Assumptions <br /> iContarrunated area is 36 feet square (6 feet on a side) <br /> Weight of gasoline is 6 1 lbs/cubic foot <br /> Weight of soil is 100 lbs/cubic foot <br /> Page 1 <br />