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Ile 3.0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> Between June 8, and September 18, 2001, the groundwater surface dropped an average of 2 43 <br /> feet, and the groundwater flow direction and gradient remained relatively constant Over the past <br /> ' five quarters, the groundwater flow direction has shifted between northwest and northeast, over a <br /> range of approximately 45 degrees <br /> Consistent with previous results, concentrations of TPH-as-gasoline and BTEX compounds are <br /> restricted to MW-2 near the dispenser islands, and MTBE is concentrated in MW-2 and MW4 <br /> downgradient of the USTs Over the past five quarters, the concentrations of gasoline <br /> hydrocarbons in groundwater have generally declined, possibly due to previous source removal <br /> ' efforts The plume of MTBE in groundwater appears to extend to the north and east of the site <br /> toward domestic water wells located on Raylow Avenue The plume appears to be mostly <br /> delineated to the south (upgradient) by MWA and to the west (cross-gradient) by MW-3 The <br /> ' vertical extent of impacted groundwater is not defined <br /> I <br /> ' Based on these conclusions, Ramage Environmental published Work Plan, Additional Site <br /> Investigation, dated September 26, 2001 Upon regulatory approval of the work plan, Ramage <br /> Environmental recommends that the work plan be implemented, following cost pre-approval by <br /> the UST Cleanup Fund <br /> i <br /> I <br /> I , <br /> 7 <br />