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.� 3 0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> Between March 19 and June 26, 2002, the groundwater surface dropped an average of 2 13 feet, <br />' the groundwater gradient increased slightly from 0 0035 to 0 0041 foottfoot, and the groundwater <br /> flow direction shifted approximately 25 degrees to the north-northwest These groundwater flow <br /> and gradient characteristics are relatively consistent with previous calculations <br />' <br /> Based on the results of previous subsurface investigations, soil and groundwater beneath the <br />' north end of the former middle UST were impacted by relatively low concentrations of gasoline <br /> hydrocarbons Most of the petroleum hydrocarbon mass remains concentrated in soil immediately <br /> below the north end of the former middle UST Vertically, the concentrations of gasoline <br /> hydrocarbons decrease rapidly with depth, and are defined between 65 and 80 feet bgs <br /> Laterally, the extent of impacted soil appears to be defined to the area of the former USTs <br />' Groundwater sampled from the four monitoring wells and single water supply well has been free <br /> of detectable concentrations of gasoline compounds for the past three quarters As such, any <br />' remaining impacted groundwater is probably limited to the area directly beneath the former UST <br /> The monitoring well network appears to adequately define the plume of impacted groundwater <br /> Based on these conclusions, Ramage Environmental recommends that the monitoring well <br /> network continue to be monitored and sampled on a quarterly basis for at least one more quarter <br />' The next groundwater monitoring is scheduled for September 2002 If, after the next quarter of <br /> sampling, groundwater continues to be free of gasoline compounds, the case should be <br />' considered for regulatory closure <br /> 1 <br /> w11 <br />