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3 0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> Between December 22, 2003 and March 11, 2004, the groundwater surface rose an average of <br /> 1 18 feet, the groundwater gradient increased from 0 0025 to 0 0058 foot/foot, and the <br /> groundwater flow direction shifted approximately 40 degrees toward the north-northwest These <br /> groundwater flow and gradient characteristics are relatively consistent with historical trends <br /> Between December 22, 2003 and March 11, 2004, the concentrations of gasoline compounds in <br /> groundwater generally decreased Concentrations of TPH-as-gasoline and BTEX detected in <br /> MW-3 during the third and fourth quarters of 2003, were not detected during the first quarter of <br /> 2004 The concentrations of ethylbenzene (0 7 µg11) and MTBE (2 1 µg11) detected in groundwater <br /> do not exceed water quality goals <br /> As shown on Figure 6, the lateral extent of impacted groundwater appears to be concentrated <br /> beneath the north end of the dispenser islands, and appears to be defined by the existing <br /> monitoring well network Despite the close proximity and shallow construction of the on-site water <br /> supply well and nearby domestic wells, they do not appear to have been impacted by gasoline <br /> compounds released from the former UST system However, given the risks associated with <br /> operating a water supply well at the site, Ramage Environmental recommends that the well be <br /> properly destroyed, and that the site be connected to city water service <br /> To further evaluate the concentrations of gasoline compounds in groundwater beneath the site, <br /> Ramage Environmental recommends that quarterly groundwater monitoring, sampling and <br /> analysis continue If the plume of impacted groundwater remains defined and the concentrations <br /> of gasoline compounds remain stable, the case should be considered for regulatory closure The <br /> next monitoring event is scheduled for June 2004 <br /> r� <br />