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• <br /> 4 . Schedule for Completion <br /> The wells are scheduled to be complete by January 1989 <br /> in accordance with the workplan. <br /> TASK 3--GROUNDWATER MONITORING <br /> 1 . Progress made this quarter <br /> Water levels were measured in all accessible wells in <br /> March and May, 1988 (Figure 1 and 2) . Wells A-8 and <br /> DSW-4C were pumping at 7 and 36 gpm, respectively. <br /> Groundwater samples were collected from 25 monitoring <br /> wells. All samples were analyzed for volatile aromatics <br /> (EPA Method 602) , phenols (Method 604) PAHs (Method 610) , <br /> arsenic, copper, and total chromium. Two samples were <br /> analyzed by Methods 624 and 625 (volatile and semi- <br /> volatile organics by GC-MS) . QA/QC included analysis <br /> of six duplicate samples and six field blanks . Analyt- <br /> ical reports are included in Appendix A. DHS collected <br /> a duplicate of the DSW-7C sample for State analysis . <br /> The sampling and analytical results confirm the previous <br /> interpretations of the nature and extent of contamina- <br /> tion, as discussed in the February 1988 Quarterly Report <br /> and in the Technical Memorandum dated February 11 , <br /> 1988 . Tables of GC-MS results and QA/QC sample data <br /> are included in Appendix A. <br /> 2 . Problems Identified <br /> Well A-9 has repeatedly been damaged by plant operations <br /> and is presently out of service. The well is located <br /> in a heavy equipment traffic area. Because the well <br /> cannot be reliably maintained and does not perform <br /> efficiently as an extraction well , A-9 should be <br /> abandoned. <br /> The groundwater monitoring program has succeeded in <br /> characterizing several of the affected wells , to the <br /> extent that additional data are not presently needed. <br /> Collecting and analyzing samples from wells already <br /> characterized as "affected" wastes resources that could <br /> be applied toward remediation. Future sampling efforts <br /> will concentrate on those wells that are not suffi- <br /> ciently characterized, or that define the limits of <br /> contamination. Wells that are considered sufficiently <br /> characterized will not be sampled quarterly. Graphs of <br /> contaminant levels for these wells are included in <br /> Appendix A. <br />