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Date October 31,2002 <br /> Quarter 3nd Quarter,2002 <br /> DISCUSSION: <br /> TPHd, TPHg, BTEX and MtBE were detected in groundwater samples during this quarter, at concentrations that <br /> were consistent with those reported in previous sampling events <br /> Groundwater elevations in the monitoring wells decreased since the previous monitoring event The calculated <br /> groundwater flow direction and gradient were similar to previous quarterly monitoring events <br /> A regional groundwater elevation contour map and a regional groundwater analytical summary were created with <br /> data from the fomer Chevron service station at 575 Grant Line Road and the former Scotty's service station at 574 <br /> Grant Line Road <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 /> Background information, including but not limited to previous field measurements, analytical results, site plans,and <br /> other data has been furnished to URS by Group Environmental Management Company, its previous consultants, <br /> and/or third parties that URS has used in preparing this report URS has relied on this information as furnished URS <br /> is not responsible for nor has it confirmed the accuracy of this information <br /> Field measurements have been supplied by a groundwater sampling subcontractor URS has not performed an <br /> independent review of the field sampling data and is neither responsible for nor has confirmed the accuracy of these <br /> data <br /> TABLES <br /> Table 1 Groundwater Monitoring Data <br /> Table 2 Analytical Results for Oxygenates <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-2) <br /> APPENDICES <br /> Appendix A Field Data Sheets <br /> Appendix B Sampling and Analysis Procedures <br /> Appendix C Laboratory Analytical Reports and Chain-of-Custody Records <br /> Appendix D Former Chevron and Former Scotty's Groundwater Monitoring Data <br /> i <br /> K V5 BP ARC0U 119MQuaner1y13_QTR 02%11194 QMMQ(edn Page 2 <br />