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i 02 May 2003 • AGE-NC Project No 95-0142 iPage 4 of 4 ' TPH-g and BTEX concentrations have steadily declined in the samples collected from the deep screened well MW-6 (screened 70 to 80 feet bsg) Presently, MW-6 is screened approximately 45 feet below the surface of first-encountered ground water , 1 • Deep monitoring wells MW-6,MW-7 and MW-8 are screened approximately 45 feet below i the surface of first-encountered ground water MTBE has been detected In the samples ' collected from well MW-7 for six consecutive quarters, but has not been detected In the samples collected from well MW-6, beneath the former UST area • The distribution of MTBE suggests that the MTBE plume has laterally migrated to well iMW-5 and vertically to well MW-7 This documents an unstable MTBE plume , i 5.0. RECOMMENDATIONS iBased upon the data collected to date, AGE recommends • Continued quarterly monitoring of monitoring and deep vapor wells at the site, the next iquarterly ground water sampling and monitoring event should be scheduled for June 2003 • Implementation of the AGE-prepared Final Remediation Plan, dated 23 April 2002 i 6.0. LEWTATIONS iOur professional services were performed using that degree of care and skill ordinarily exercised by environmental consultants practicing in this or similar localities The findings were based upon i' analytical results provided by an independent laboratory Evaluations of the hydrogeologic y conditions at the site for the purpose of this investigation were made from a limited number of data points(i a monitoring-well ground water samples)and subsurface conditions may vary away from ithese data points No other warranty, expressed or implied, is made as to the professional interpretations, opinions, recommendations contained in this report i r iRdvanced GeeHn mmnrn=tal,Inc i