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Y <br /> ' z <br /> Page 2 <br /> October 5, 1992 <br /> Job No 0511-30-6090-04 <br /> Based on soil vapor concentrations presented in Table A, approximately 11,428 pounds (1,828 <br /> gallons) of gasoline were extracted during this reporting period ' The remediation system has been <br /> operating since August 1989, and since then, approximately 72,865�pounds (11,828 gallons) of <br /> gasoline have been extracted and treated Attachedlare two figures which show the mass of gasoline <br /> -extracted per month (Figure Qand the cumulative mass of gasolene extracted (Figure 2) <br /> 1 <br /> Sincerely, ` <br /> DU PONT ENVIRONMENTAL REMEDIATION SERVICES <br /> r <br /> Michael Cadreau St n L Jes , P E Andrew an <br /> Sr Field Services Coordinator Section Manager, Environmental Specialties Project Manager <br /> JAD/SLJ/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 Chain-of-Custody Forms <br /> Du-Pont Environmental-Remediation-Services <br /> 051112 Rev 0 Pnnted on Recycled Paper <br />