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I 08 December 2000 <br /> AGE-NC Project No 98-0452 <br /> Page 3 of 3 <br /> I <br /> 4.0 SUMMARY AND CONCLUSIONS <br /> IBased upon data collected from the site, AGE concludes the following <br />' • The ground water gradient was calculated to be 0 004 ft/ft with a flow direction toward the <br /> south to southwest <br /> Based on the lack of detectable concentrations of TPH-g and BTEX compounds from <br />' previous sampling events, PHS-EHD personnel directed AGE to discontinue the analysis for <br /> the above mentioned analytes in the ground water samples collected during the September <br />' 2000 sampling event <br /> • TPH-dwas not detected above laboratory reporting limits in any of the groundwater samples <br /> collected and analyzed <br /> • MTBE was detected at a concentration of 120 ppb in monitoring well sample MW-3 <br /> 5.0. RECOMMENDATIONS <br /> 10 Based upon data collected from the site, AGE recommends <br /> • An additional ground water monitoring event for MTBE <br /> The next quarterly monitoring event should be scheduled for December 2000 <br /> 6.0. LIMITATIONS <br /> Our 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 /> measurements and analytical results provided by an independent laboratory Evaluations of the <br /> geologlc/hydrogeologic conditions at the site for the purpose of this investigation are made from a <br /> limited number of available data points (I e probe boring soil and ground water samples) and <br /> subsurface conditions may vary away from these data points No other warranty, expressed or <br /> Implied, is made as to the professional recommendations contained in this report <br /> i <br /> I <br /> • <br /> Advanced GeoEnvironmental,Ine <br />