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ADDITIONAL ACTIVITIES PERFORMED AT SITE <br />' No additional activities were performed at the site <br /> IWORK PROPOSED FOR NEXT QUARTER <br /> Groundwater will be monitored in accordance with the attached groundwater monitoring plan <br />' ETIC Engineering,Inc is currently assessing the potential rru ration of petroleum hydrocarbons and <br /> MTBE from offsite sources onto this site, as well as new, unauthorized releases onsite MTBE has <br /> Ibeen detected by EPA Method 8260 in groundwater samples collected from well VEW3 at <br /> concentrations of 30,300 micrograms per liter(µg/L) on 12 March 2002 and 16,350 µg/L on 2 May <br />' 2002 MTBE was not detected at or above EPA Method 8260 reporting limits in groundwater <br /> samples collected from this well in either February or May 2001 As VEW3 is located within <br /> approximately 15 feet of the existing underground storage tanks (USTs), this recent dramatic <br />' increase in MTBE concentrations may indicate that a new, unauthorized release associated with the <br /> current USTs has occurred ExxonMobil has not operated the station since December 1995 Based <br /> on this assessment,ETIC believes the addition of new responsible parties is warranted at this time <br /> Attachments <br /> lie Figure 1 Site Plan Showing Groundwater Elevations and Analytical Results <br /> Table 1 Well Construction Details <br /> Table 2 Groundwater Monitoring Data <br /> Table 3 Groundwater Monitoring Plan <br />' Appendix A Field Protocols <br /> Appendix B Field Documents <br />' Appendix C Laboratory Analytical Reports <br /> I <br /> • <br /> SPar�ets\73748Vnwirrtiwp�g4542\3748ten�Jo, <br /> 1 <br />