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1 <br /> 3.0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> Between September 18 and December 17, 2001, the groundwater surface rose an average of <br /> 1 25 feet, and the groundwater flow direction and gradient remained relatively constant Over the <br /> ' past six quarters, the groundwater flow direction has shifted between northwest and northeast, <br /> over a 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 MW-4 <br /> ' downgradient of the USTs Over the past six 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 MW-1 and to the west (cross-gradient) by MW-3 The <br /> vertical extent of impacted groundwater is not defined <br /> ' Based on these conclusions, Ramage Environmental published Work Plan, Additional Site <br /> Investigation, dated September 28, 2001 Upon regulatory approval of the work plan, Ramage <br /> Environmental recommends that the scope of work be implemented, following cost pre-approval <br /> by the UST Cleanup Fund <br /> • 7 <br />