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Date: January 5,2005 <br /> Quarter: 0 Quarter,2004 <br /> DISCUSSION: <br /> Methyl tert-butyl ether (MtBE) was detected above laboratory reporting limits in the groundwater sample collected <br /> from site monitoring well MW-2 this quarter. In MW-2, MtBE concentrations increased from 2.6 micrograms per <br /> liter (µg1L) in the previous quarter to 21 pg/L this quarter. The MtBE concentration in MW-2 is consistent with <br /> detections reported during and previous to the first quarter of 2004. MtBE was not detected above laboratory <br /> reporting limits in MW-4 this quarter.No other analytes were detected above laboratory reporting limits. <br /> Groundwater elevations in site wells increased relative to the previous quarter. The approximate groundwater flow <br /> direction was toward the southeast at an average hydraulic gradient of 0.004 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 /> KAWprocessV5 BP ARCCW54501QuWff1y1200414 QTR 04 5450 GWMR 4Q04Am Page 2 <br />