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3 0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> Since groundwater levels were last measured on May 18, 2001, the groundwater surface dropped <br /> an average of 2 90 feet This represents the lowest groundwater surface elevation since February <br /> 1998 Since May 1992, the groundwater levels have risen approximately 26 5 feet As measured <br /> this quarter, the groundwater flow direction and gradient remain consistent with historical trends <br /> Since the monitoring well network was last sampled in May 2001, the concentration of MTBE in the <br /> downgradient well MW-5 has increased from 120 µg11 to 290 µg/l The plume of groundwater <br /> impacted by MTBE remains undefined to the northeast, downgradient of the former UST <br /> Groundwater from Irrigation Well#2 did not contain detectable concentrations of any of the <br /> gasoline constituent compounds analyzed <br /> On June 20, 2001, Ramage Environmental published Work Plan, Additional Site Investigation to <br /> further define the extent of impacted groundwater Currently, the work plan is pending regulatory <br /> review and approval <br /> Based on these conclusions, Ramage Environmental recommends the following course of <br /> environmental corrective action <br /> 1 Gain regulatory approval of the proposed scope of work, and secure cost pre-approval from the <br /> UST Cleanup Fund for the work plan implementation Upon cost pre-approval, schedule and <br /> implement the scope of work <br /> ' 2 Continue to monitor and sample groundwater from all nine monitoring wells and Irrigation Well <br /> p 9 9 9 <br /> ' #2 on a quarterly basis The next quarterly groundwater monitoring is scheduled for November <br /> 2001 <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br />