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15 February 2002 <br /> AGE-NC Project No 99-0559 <br />' Page 7 of 7 <br /> from well MW-5C <br /> • The distribution of contaminates in unit 6 is suggestive of two dissolved plumes of limited <br /> horizontal extent, with MTBE at the west edge of the site at well MW-5E and TPH and <br />' BTEX In the former UST area <br /> • The lateral and vertical extent of impacted ground water has not been fully defined, except <br />' toward well MW-8, east of the site <br />' 5.0. RECOMMENDATIONS <br />' Based on the findings and conclusions In this report, AGE recommends the following <br /> • Additional assessment ofthe hydrocarbon and MTBE-Impacted ground water west ofthe site <br /> to determine the lateral and vertical extent of the plumes <br /> • Continue quarterly ground water monitoring <br /> 1 Interim ground water remediation should proceed Immediately to minimize the migration of <br /> the free-product and high concentrations of MTBE <br /> 6.0. LIMITATIONS <br /> tOur 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 mainly <br />' upon analytical results provided by an Independent laboratory Evaluations of the geologic/hydro- <br /> geologic conditions at the site for the purpose of this investigation are made from a limited number <br /> of available data points(e g 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 />' Advanced GeoEnvironmental,Inc <br />