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1 <br /> 3.0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> Between August 19, and December 30, 2004, the groundwater surface dropped an average of <br /> 0 04 feet, the groundwater gradient increased from 0 0086 to 0 0134 foottfoot, and the <br /> groundwater flow direction remained toward the northeast The depth to groundwater beneath the <br /> site was at its lowest level, since the monitoring wells were installed in July 2002 Otherwise, the <br /> groundwater surface characteristics are consistent with historical and seasonal trends <br /> Between August 19, and December 30, 2004, gasoline compounds in groundwater generally <br /> declined at MW-1, and increased at MW-2 and MW-3 Concentrations of gasoline compounds in <br /> groundwater at MW-1 have generally declined, since the monitoring wells were installed in July <br /> 2002, probably due to source removal efforts and natural attenuation processes In the last four <br /> quarterly sampling events on March 24, June 18, August 19, and December 30, 2004, increasing <br /> rconcentrations of MTBE have been detected in the perimeter wells (MW-2 and MW-3) As such, it <br /> appears that MTBE has migrated away from the source area in the downgradient direction, and <br /> that the extent of impacted groundwater is undefined <br /> Ramage Environmental recommends that the plume of impacted groundwater continue to be <br /> monitored on a quarterly basis If the concentrations of MTBE in the perimeter wells continue to <br /> increase, it may be necessary to expand the groundwater monitoring well network <br /> 1 <br /> r <br /> r <br /> r <br /> r <br /> r <br /> • <br /> r <br /> r <br />