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Date, December 21, 2004 <br /> Quarter: 4`h Quarter,2004 <br /> • DISCUSSION: <br /> Gasoline range organics (GRO), total xylenes, methyl tert-butyl ether (MtBE), and 1,2-dichlaroethane (1,2-DCA) <br /> were detected above laboratory reporting limits in groundwater samples collected from site monitoring wells this <br /> quarter In MW-2,GRO and total xylenes increased to concentrations consistent with second quarter 2004 and MtBE <br /> and 1,2-DCA concentrations decreased this quarter Other analyte concentrations were generally consistent with the <br /> previous monitoring event <br /> Groundwater elevations in site wells decreased relative to the previous monitoring event The inferred groundwater <br /> flow direction was to the southeast at an average hydraulic gradient of 0 018 ft/ft <br /> This report is based on data, site conditions,and other information that are generally applicable as of the date of the <br /> report,and the conclusions and recommendations herein are therefore applicable only to that time frame <br /> TABLES <br /> Table I Groundwater Elevation and Analytical Data <br /> Table 2 Fuel Oxygenates Analytical Data <br /> Table 3 Groundwater Gradient Data <br /> FIGURES <br /> Figure i Groundwater Elevation Contours <br /> Figure 2 Groundwater Analytical Summary <br /> APPENDICES <br /> Appendix A Field and Laboratory Procedures <br /> Appendix B Laboratory Analytical Reports,Cham-of-Custody Documentation,and Field Data Sheets <br /> Appendix C GeoTracker Upload Confirmation <br /> K 1WPm—&V5 BP ARC05007601Quanerfy1200414Qtr041760 GWMR 4QO4 dm Page 2 <br />