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21 March 2001 <br /> . AGE-NC Project No 98-0452 <br /> Page 3 of 3 <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> Based upon data collected from the site, AGE concludes the following <br /> • The ground water gradient was calculated to be 0 002 ft/ft with a flow direction toward the <br /> north to northeast <br /> • TPH-g was not detected above laboratory reporting lnriits in any of the ground water samples <br /> icollected and analyzed <br /> • MTBE was detected in monitoring wells MW-3, MW 2 and MW-1 at concentrations of 63 <br /> i �tg/l, 14 gg/l and 2 7 4g/l, respectively The concentration detected in sample MW-3 <br /> exceeeds the action level and Maximum Containment Level for MTBE in drinking water <br /> i <br /> 5.4. RECOMMENDATIONS <br /> iBased upon data collected from the site, AGE recommends an additional ground water monitoring <br /> event for MTBE The next quarterly monitoring event should be scheduled for March 2001 <br /> i � <br /> 6.0. LIMITATIONS <br /> IOur professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities The findings were based upon field <br /> I measurements and analytical results provided by an independent laboratory Evaluations of the <br /> geologic/hydrogeologic conditions at the site for the purpose of this investigation are made from a <br /> limited number of available data points (i e ground water samples) and subsurface conditions may <br /> vary away from these data points No other warranty, expressed or implied, is made as to the <br /> professional recommendations contained in this report <br /> I q <br /> I <br /> I <br /> Advanced GeoEnvironmental,Inc <br />