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aq i <br /> 02 May 2003 <br /> • AGE-NC Project No 95-0142 <br /> Page 4 of 4 <br /> • TPH-g and BTEX concentrations have steadily declined in the samples collected from the <br /> deep screened well MW-6 (screened 70 to 80 feet bsg) Presently, MW-6 is screened <br /> approximately 45 feet below the surface of first-encountered ground water <br /> • Deep monitoring wells MW-6,MW-7 and MW-8 are screened approximately 45 feet below <br /> the surface of first-encountered ground water MTBE has been detected in the samples <br /> collected from well MW-7 for six consecutive quarters, but has not been detected in the <br /> samples collected from well MW-6, beneath the former UST area <br /> • The distribution of MTBE suggests that the MTBE plume has laterally migrated to well <br /> MW-5 and vertically to well MW-7 This documents an unstable MTBE plume <br /> 5.0. RECOMMENDATIONS <br /> Based upon the data collected to date, AGE recommends <br /> • Continued quarterly monitoring of momtonng and deep vapor wells at the site, the next <br /> quarterly ground water sampling and monitoring event should be scheduled for June 2003 <br /> Implementation of the AGE-prepared Final Remediation Plan, dated 23 Apnl 2002 <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 <br /> analytical results provided by an independent laboratory Evaluations of the hydrogeologic <br /> conditions at the site for the purpose of this investigation were made from a limited number of data <br /> points (i a momtonng-well 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 /> interpretations, opinions, recommendations contained in this report <br /> Advanced GeoEnvironmental,Inc <br />