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d i <br /> Date: March 23,2005 <br /> Quarter: 1"Quarter,2005 <br /> DISCUSSION: <br /> GRO, MtBE, and TBA were detected above laboratory reporting limits in groundwater samples collected from site <br /> monitoring wells this quarter GRO and MtBE concentrations in MW-2 and MW-3 and MtBE concentrations in <br /> MW-4 increased relative to the previous quarter Additionally in MW-3,TBA concentrations increased from 02,000 <br /> micrograms per liter (ug/L), reported during fourth quarter 2004, to 7,600 fig/L this quarter In MW-5, MtBE was <br /> detected at the highest concentration (6,200µg/L) since sampling began in April 2003 Other analyte concentrations <br /> were generally consistent with previous sampling events <br /> Groundwater elevations in site monitoring wells increased relative to the previous monitoring event The inferred <br /> direction of groundwater flow across the site ranged from the southeast to the northeast at an average hydraulic <br /> gradient of 0 002 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 /> i <br /> • Figure 1 Groundwater Elevation Contours <br /> Figure 2 Groundwater Analytical Summary <br /> APPENDICES <br /> Appendix A Sampling and Analysis Procedures <br /> Appendix B Laboratory Analytical Report,Cham-of-Custody Documentation,and Field Data Sheets <br /> Appendix C GeoTracker Upload Confirmation <br /> �I <br /> K\WPmcm,\15 BP ARCa11191\QuarluW005\1 QTR 65/11191 GWMR IQ65 do Page 2 <br />