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. 4.0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> Between March 29, and May 6, 2002, the groundwater surface dropped an average of 0 49 feet, <br /> the groundwater flow direction shifted approximately 125 degrees to the northeast, and the <br /> gradient decreased from 0 015 to 0 0012 foot/foot Over the past three quarterly monitoring <br /> events, the groundwater flow direction has shifted from south to northwest to northeast These <br /> changes in the groundwater surface characteristics may be due to variations in seasonal <br /> groundwater recharge and/or influence from the municipal irrigation well <br /> Between March 29, and May 6, 2002, the concentrations of gasoline compounds in MW-1 and <br /> MW-2 have remained relatively constant, and the concentrations in MW-3 have declined In <br /> rgroundwater, 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 August <br /> 2002 <br /> 1'0 6 <br />