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Date January 20,2005 <br /> Quarter. 4's Quarter,2004 <br /> • DISCUSSION: <br /> Gasoline range organics (GRO) and methyl tert-butyl ether(MtBE) were the only analytes detected above laboratory <br /> reporting limits in the groundwater samples collected from site wells ATR-5 and ATR-8 this quarter Analyte <br /> concentrations were generally consistent with historic data <br /> Groundwater elevation in site wells generally increased relative to the previous monitoring event The inferred <br /> direction of groundwater flow across the site ranged from the northwest to east at an average hydraulic gradient that <br /> ranged from 0 002 to 0 005 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 1 Groundwater Elevation and Analytical Data <br /> Table 2 Fuel Oxygenates Analytical Data <br /> Table 3 Groundwater Gradient Data <br /> FIGURES <br /> Figure 1 Groundwater Elevation Contours <br /> Figure 2 Groundwater Analytical Summary <br /> • APPENDICES <br /> Appendix A Field and Laboratory Procedures <br /> Appendix B Laboratory Analytical Reports,Chain-of-Custody Documentation,and Field Data Sheets <br /> Appendix C GeoTracker Upload Confirmation <br /> i <br /> K%WPmmssV5 BP ARCM020931Quw1edyX200414 QTR 04\2093 GWMR 4Q04 doc Page 2 <br />