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Page 2 <br /> July 2, 1992 <br /> Job No 0511-40-6090-04 <br /> Based on soil vapor concentrations presented u1 Table A, approximately 8,436 pounds (1,370 <br /> gallons) of gasoline were extracted during this reporting period The remediation system has been <br /> operating since August 1989, and smce then, approximately 61,436 pounds (9,973 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 DeBiaso, Jr St en L Je>, P Andrew an <br /> Staff Engineer Section Manager, Environmental Science Project Manager <br /> JAD/SJ/AC jc <br /> Attachments Table A - Summary of Soil Vapor Laboratory Results <br /> Figure 1 - Gasoline Extracted Per Month <br /> Figure 2 - Cumulative Gasoline Extracted <br /> Appendix A - Laboratory Results and Chaul-of-Custody Forms <br /> I <br /> Du Pont Environmental Remediation Services <br /> 05117 Rev 0 Pnnted on Recycled Paper <br />