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I <br />' 21 November 2005 <br /> • AGE-NC Project No 96-0263 <br />' Page 4 of 4 <br /> I Concentrations of MTBE In ground water samples collected from wells MW-2, MW-4, <br /> MW-5 and MW-7 between June 2004 and March 2005 have decreased significantly <br /> Dissolved MTBE concentrations have been declining slowly over time,but the March 2005 <br />' sampling event was the first time that MTBE was not detected In samples collected from <br /> well MW-5 Graphs Illustrating concentrations of MTBE over time In wells MW-2,MW-4, <br /> MW-5 and MW-7 are presented In Appendix A <br /> I <br /> I5.0. RECOMMENDATIONS <br /> Based upon data collected from the site, AGE recommends continued operation of the ozone <br />' <br /> injection remediation system,based on the declining tends of dissolved hydrocarbons In well MW-2 <br /> and MW-7 <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 Evaluation of the hydrogeologlc conditions <br />' at the site for the purpose of this Investigation was made from a limited number of available data <br /> points and subsurface conditions may vary away from these data points No other warranty, <br /> expressed or Implied,Is made as to the professional interpretations,opinions and recommendations <br />' contained In this report <br /> Advanced GeoEnvironmental,Inc <br />