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1 <br />' 19 July 2002 <br /> AGE-NC Project No 95-0173 <br />' Page 8 of 8 <br />' To address deeper petroleum hydrocarbon-Impacted ground water at the site, AGE proposes that at <br /> least one additional remediation alternative be evaluated due to the modest to below average clean- <br /> up effectiveness being encountered utilizing IAS <br /> AGE recommends that a ground water pumping test be performed at the site to obtain general aquifer <br /> characteristics such as hydraulic conductivity, transmissivity, storativity and drawdown at various <br />' pumping rates Results of the pump test would be utilized to estimate a radius of Influence for the <br /> zone of capture of dissolved petroleum hydrocarbons and to evaluate the feasibility of ground water <br /> extraction as a remediation alternative in deeper petroleum-Impacted ground water <br /> In deeper water, in-situ ozone spargmg (IOS) should be evaluated as a remediation alternative due <br /> to Its potential to be cost effective The results the IOS pilot test will provide data to calculate an <br /> effective radius of Influence and determine feasibility of TOS as a remediation alternative <br /> 7 0. LIMITATIONS <br /> Our professional services were performed using the 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 Evaluation of the hydrogeologic <br /> I conditions at the site for the purpose of this Investigation Is made from a limited number of available <br /> data points(e g ground water and SVE air flow samples), and subsurface conditions may vary away <br /> from these data points No other warranty, expressed or implied, is made as to the professional <br /> interpretations, opinions and recommendations contained in this report <br /> Advanced GeoEnvironmental,Inc <br />