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• 4.0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> Between December 6, 2001 and March 29, 2002, the groundwater surface rose an average of <br /> 1 84 feet, the groundwater flow direction shifted approximately 125 degrees to the northwest, and <br /> the gradient increased This change in the groundwater surface characteristics may be due to <br /> variations in seasonal groundwater recharge and/or influence from the municipal irrigation well <br /> In groundwater, gasoline hydrocarbons continue to be concentrated near former UST#3 <br /> Concentrations of gasoline compounds decrease with distance to the east and northeast of <br /> former UST#3 As shown on the isoconcentration map for MTBE in groundwater (Figure 4), the <br /> lateral extent of MTBE at the water table is undefined to the south, west and east of the former <br /> UST The vertical extent of impacted groundwater has not been investigated <br /> Based on these conclusions, Ramage Environmental recommends that a work plan be prepared <br /> to further investigate the lateral and vertical extent of impacted soil and groundwater, and to <br /> initiate soil and groundwater remediation at the site Additionally, quarterly groundwater <br /> monitoring and sampling should continue The next monitoring event is scheduled for June 2002 <br /> r <br /> 6 <br />