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Date. July 24,2002 <br /> Quarter 2nd Quarter,2002 <br /> isampled this quarter at a concentration of 0 79 ppb (ATR-8) Methyl tert-butyl ether (MTBE) was reported in three <br /> of the five wells at concentrations ranging from 0 82 ppb(ATR-8)to 300 ppb(ATR-2) Chemical concentrations are <br /> generally consistent with historical data, with the exception of ATR-2, which contained TPHG for the first time this <br /> quarter Groundwater elevations across the site decreased by an average of 0 10 ft Groundwater flow was to the <br /> northeast at an approximate gradient of 0 009 ft/ft, which is consistent with the historical northeasterly trend <br /> Attachment A contains SVE/AS system operational data <br /> This report presents our understanding of existing conditions at the subject site The conclusions contained herein <br /> are based on the analytical results, and professional judgment in accordance with current standards of professional <br /> practice, no other warranty is expressed or implied URS assumes no responsibility for exploratory borings or data <br /> reported or supplied by other consultants or contractors <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 Contour Map <br /> Figure 2 Groundwater Concentration Map <br /> APPENDICES <br /> Appendix A Remedial System Performance Evaluation <br /> Appendix B Field and Laboratory Procedures <br /> Appendix C Laboratory Analytical Reports,Chain-of-Custody Documentation,and Field Data Sheets <br /> K us BP nRc0102o931Quan"1y\2 QTR 02\cwNIR dog Page 2 <br />