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07 November 2004 <br /> AGE-NC Project No 96-0232 <br /> Page 11 of 11 <br /> 5.0 RECOMMENDATIONS <br /> AGE has considered four remedial methods for addressing MTBE-impacted ground water at the <br /> subject site Consideration of site specific conditions, remedial principles, advantages and <br /> disadvantages of each remedial method and AGE's experience with each method,AGE recommends <br /> the following actions for final remediation of remaining MTBE-impacted ground water at the site <br /> 1 Performance of ozone bench-scale testing to evaluate whether or not an IOS remediation <br /> technology would negatively impact the subsurface environment at the site <br /> 2 Preparation of an addendum to the Final Remediation Plan(dated 31 August 2000)detailing <br /> the proposed installation and operation of the IOS system This work plan should include the <br /> installation of sparging points, sparge wells and ozone generator <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 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 a monitoring wells, soil borings) and subsurface conditions may vary away <br /> from 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 />