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"AWuAM <br /> Working to Restore Nature <br /> presented in Table 4 For additional information of each sampling event, refer to our <br /> reports 30003-6 (July 31, 1992) and 30003-9 (February 16, 1994). Our field methods for <br /> groundwater sampling are described in Appendix A <br /> 4.4 Vapor Extraction Well Installation <br /> In December 1991, four vapor extraction wells (VW-1, VW-2, VW-3, and VW-4) were <br /> installed in borings B-3, B-4, B-5, and B-7, respectively Following the vapor extraction test <br /> (VET) of December 30, 199 1,vapor extraction wells VW-5, VW-6, VW-7, VW-8, VW-9, and <br /> VW-10 were installed in borings B-10,B-11, B-12, B-13, B-14 and B-15, respectively Details <br /> on the construction of the wells are shown on the Logs of Borings (Appendix B) and <br /> described on Table 3 <br /> 45 Vapor Extraction Test <br /> s <br /> A VET was conducted on December 30, 1991, to evaluate the feasibility of using vapor <br /> extraction to remediate soil at the site (RESNA, February 10, 1992) The results of <br /> laboratory analyses for the vapor samples are summarized in Table 5 Copies of the Chain <br /> of Custody Records and results of laboratory analyses of the vapor samples are in Appendix <br /> C Results of the VET are discussed in the Remedial Options section <br /> 4_6 Air-Sparge Well Installation <br /> To evaluate the feasibility of removing hydrocarbons using air-sparging, one air-sparging well <br /> (AS-1) and three air-monitoring sparge points (MS-1, MS-2, and MS-3) were installed in <br /> borings B-17, B-18, B-19, and B-20, respectively. Details on the construction of the air- <br /> sparging well and monitoring sparge point are shown on the Logs of Borings (Appendix B) <br /> and described on Table 3 <br /> S3"3-7 6 <br />