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Date October 19,2005 <br /> Quarter: 3r1 Quarter,2005 <br /> • DISCUSSION: <br /> Gasoline range organics (GRO),benzene, ethylbenzene, total xylenes, methyl tert-butyl ether(MtBE), and tert-butyl <br /> alcohol (TBA) were detected above laboratory reporting limits in groundwater samples collected from site wells <br /> during this quarter Other analyte concentrations were generally consistent with historic site data <br /> Groundwater elevations in the site monitoring wells generally decreased relative to the previous monitoring event <br /> The inferred direction of groundwater flow across the site was toward the northwest at an average hydraulic gradient <br /> range of 0 009 to 0 01 ft/ft <br /> A regional groundwater elevation contour map (Figure 1) and a regional groundwater analytical summary(Figure 2) <br /> were created with data from the former Chevron service station at 575 Grant Line Road and the former Scotty's <br /> service station at 574 Grant Line Road Groundwater elevation and analytical data from the former Chevron and <br /> former Scotty's service stations are attached a5 Appendix C <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 /> FIGURES <br /> Figure I Regional Groundwater Elevation Contours <br /> Figure 2 Groundwater Analytical Summary <br /> TABLES <br /> • Table I Groundwater Monitoring and Analytical Data <br /> Table 2 Fuel Oxygenates Analytical Data <br /> Table 3 Groundwater Gradient Data <br /> Table 4 Monitoring Well Construction Data <br /> APPENDICES <br /> Appendix A Sampling and Analysis Procedures <br /> Appendix B Laboratory Analytical Reports,Cham-of-Custody Documentation,and Field Data Sheets <br /> Appendix C Former Chevron and Former Scotty's Groundwater Monitoring Data <br /> Appendix D GeoTracker Upload Confirmation <br /> K\Wpmcems J,BP ARCOM 1941Q..ner]y%2005%3 QTR 03%11194 GWMR 305 doe Page 2 <br />