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1 <br /> } 1 <br /> 15 Jan airy 2001 <br /> AGE-NC Project No 99-0624- <br /> Page 4 of 4 ' <br /> • Utilizing EPA Method 8260M,MTBE was detected at concentrations of 1,300 �Ig/l and 12 <br /> 4g11 in ground water samples from MW-2 and MW-3,respectively MTBE was not detected <br /> in samples collected from MW-1 and MW-4 The data shows that MTBE-impact to ground <br /> water does not extend to the west to MW-1 or to the north to MW-4 in shallow ground water <br /> at this time <br /> I • The lateral extent of dissolved hydrocarbon-andMTBE-impacted ground water has not been <br /> delineated northeast,east, and south of MW-2 <br /> I <br /> 5.0. RECOMMENDATIONS <br /> Based on the results of this investigation, AGE recommends <br /> • Continued quarterly monitoring of wells on-site <br /> • Additional soil and ground water investigation focused in the down gradient direction, <br /> • especially in the area of MW-2 and the UST and dispenser systems, to determine the lateral <br /> extent of petroleum hydrocarbon-impact and MTBE-impact to soil and ground water The <br /> next quarterly monitoring event is scheduled for March 2001 <br /> 6.0. LIMITATIONS <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environniental consultants practicing in this or similar localities The findings were based upon <br /> analytical results provided by an independent laboratory'Evaluations of the geologic/hydrogeologic <br /> conditions at-the site for the purpose of this investigation are made from a limited number of <br /> available data points (i e ground water samples) and subsurface conditions may vary away from <br /> these data points No other warranty, expressed or implied, is made as to the professional <br /> recommendations contained in this report <br /> I <br /> I a <br /> Advanced GcoEnvironmental,Joe <br />