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Page 2 <br /> April 7, 1992 <br /> Job No 400511-M <br /> Based on soil. vapor concentrations presented in Table A, approximately 8,502 pounds (1,380 <br /> gallons) of gasoline were extracted during this reporting period The remediation system has been <br /> operating since August 1989, and since then, approximately 53,000 pounds (8,664 gallons) of <br /> gasoline have been extracted and treated Attached are two figures which show the mass of gasoline <br /> extracted per month (Figure 1) and the cumulative mass of gasoline extracted (Figure 2) <br /> Sincerely, <br /> DU PONT ENVIRONMENTAL REMEDIATION SERVICES <br /> Joseph A DeBxaso, Jr Rande Geary Michael Re e d2 <br /> Staff Engineer Section Manager, Engineering Project Manager <br /> JAD/RG/MR ca <br /> Attachments Table A - Summary of Soil Vapor Laboratory Results <br /> Figure 1 - Gasoline Extracted Per Month <br /> Figure 2 - Cumulative Gasohne Extracted <br /> Appendix A - Laboratory Results and Chain-of-Custody Forms .� <br /> J <br /> Du Pont Environmental Remediation Services <br /> 400511.5 Rev 0 panted on Recycled Paper <br />