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i <br /> Vf <br /> 10 February 2003 <br /> AGE-NC Project No 95-0144 <br /> Page 4 of 4 <br /> • Ground water elevations in deep-screened wells, completed in the Lower Water Zone,were <br /> between 1 66 to 193 feet lower than in shallow-screened wells,completed within the Upper r <br /> Water Zone <br /> ' • Ground water was Inferred to flow towards the north-northeast in the Upper Water Zone,but <br /> was inferred to flow towards the west-northwest In the Lower Water Zone <br /> • TPH-g, toluene, ethylbenzene and xylenes were detected in the ground water sample <br /> ' collected from monitoring well MW-5 Detectible concentrations ofpetroleum hydrocarbons <br /> had not been detected in samples collected from MW-5 since November 1997 The detected <br /> ' concentrations of petroleum hydrocarbons in MW-5 appear to be related to the recent <br /> decrease in ground water elevation at the site The ground water table was approximately 14 <br /> feet above the screened interval of MW-5 <br /> • Target analytes were not detected above laboratory reporting limits in the samples collected <br /> from wells MW-2 and MW-4 ° <br /> ' The east, west and vertical extent of impacted ground water is not well defined x <br /> " <br /> 5.0. RECOMMENDATIONS <br /> ' Based upon data obtained during the fourth quarter of 2002 and previous sampling events, AGF <br /> recommends <br /> t Continued quarterly monitoring of the site The next quarterly monitoring event should be <br /> • scheduled for March 2003, concurrent with monitoring at the former Chase Chevrolet Van <br /> Buren site <br /> Preparation of a Final Remediation Plan to address tiydtocarbon-impacted ground water near <br /> the former UST No S <br /> 6,0 LIMITATIONS <br /> ' Our professional services were performed using that degree of care and skill ordinarily exercised <br /> by environmental consultants practicing in this or similar localities The findings were based mainly <br /> upon analytical results provided by an independent laboratory Evaluations of the hydrogeologic <br /> conditions at the site Have been made from a limited number of available data points (I e ground <br /> water monitoring wells, ground water samples) and subsurface conditions may vary through time <br /> ' and with distance from these data points No other warranty,expressed or implied, is made as to the <br /> professional mterpretattons, opinions and recommendations contained in this report <br /> Advanced Geoknvironmental,InL <br /> i <br />