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3 0 CONCLUSIONS, RECOMMENDATIONS AND PROJECT STATUS <br /> s <br /> Between June 6, and September 15, 2003, the groundwater surface dropped an average of 1 67 <br /> feet, the groundwater gradient decreased from 0 0094 to 0 0080 foot/foot, and the groundwater <br /> flow direction remained stable toward the northeast These groundwater flow and gradient <br /> characteristics are consistent with historical trends In general, the groundwater table elevation is <br /> at its lowest level since the monitoring wells were installed in September 2000 <br /> Between June 6, and September 15, 2003, the concentrations of TPH-as-gasoline and BTEX <br /> compounds increased in MW-1, MW-3, and MW-4 This may be related to the decline in the <br /> groundwater table elevation Since September 2000, concentrations of gasoline compounds in <br /> groundwater beneath the site have generally declined, probably in response to prior source <br /> removal efforts and natural attenuation processes <br /> Based on cumulative soil and groundwater analytical results, gasoline compounds in the <br /> subsurface appear to be mostly defined to the dispenser area and to the northeast within the <br /> property boundaries As such, despite the close proximity and shallow construction of the on-site <br /> water supply well and nearby domestic wells, they do not appear to have been impacted by <br /> gasoline compounds released from the former UST system <br /> joTo further evaluate the rising concentrations of gasoline compounds in groundwater beneath the <br /> site, Ramage Environmental recommends that quarterly groundwater monitoring, sampling and <br /> analysis continue The next monitoring event is scheduled for December 2003 <br />