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�1 <br /> Date: September 23,2003 <br /> Quarter 3'a Quarter,2003 <br /> • DISCUSSION: <br /> Total petroleum hydrocarbons as gasoline (TPHg), xylenes (total), and methyl tert-butyl ether(MtBE)were reported <br /> above method detection limits in groundwater samples collected from site monitoring wells during this sampling <br /> event TPHg and MtBE concentrations increased in MW-1 this quarter Total xylenes were reported in MW-1 at the <br /> highest concentration relative to historic data at 1,000 micrograms per liter(gg/L) TPHg and MtBE concentrations <br /> in wells MW-2 and MW-4 decreased relative to the previous monitoring event Otherwise, analyte concentrations <br /> were generally consistent with previous monitoring events Groundwater elevations in site monitoring wells <br /> decreased relative to the previous monitoring event The inferred direction of groundwater flow across the site was <br /> to the south-southeast at an average gradient of 0 007 feet/foot <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 /> Figure 3 Concentration and Water Level Trends(Well MW-3) <br /> APPENDICES <br /> Appendix A Field Data Sheets <br /> Appendix B Sampling and Analysis Procedures <br /> Appendix C Analytical Reports and Cham-of-Custody Records <br /> Appendix D GeoTracker Upload Confirmation <br /> I <br /> K 1WproCeSSIM BP ARCO�111915Quancrl}\3 QTR 0311]191 GWMR 3Q03 doc Page 2 <br />