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Y . • <br /> . 05 September 1997 <br /> AGE-NC Project No 95-0102 <br /> Page 3 of 4 <br /> IN-SITU BIO SPARGING <br /> • Based upon the above referenced volume of the core area, we anticipate installation of five <br /> sparging wells will be necessary for successful remediation The approximate costs for <br /> installation of the sparging wells will be $15,000 <br /> • A compressor-based biosparging system recommended for the site The approximate cost <br /> for design and installation of the sparging system will be $10,000 to $15,000 <br /> • Based upon the an evaluation of site conditions, the estimated duration for operation of an <br /> system at the site is 18 to 36 months, an 80 and 90 percent reduction of hydrocarbons <br /> should be feasible at the site The estimated cost for operation, maintenance, monitoring <br /> and confirmation sampling will be between $18,000 and $36,000 <br /> • Costs for laboratory analysis, permitting, regulatory liaison and report preparation for the <br /> duration of remediation is estimated between $10,000 and $15,000 <br /> • The following is a summary of costs for installation and operation of a biosparging system for <br /> remediation of the core area of hydrocarbon impaction at the site <br /> TASK COST <br /> Installation d Brosparging wells $15,000 <br /> Design and installation of compressor-based Bzosparging system $10,000 to$15,000 <br /> Operation, monitoring, maintenance and confirmation sampling $18,000 to$36,000 <br /> Regulatory liaison, laboratory analysis, report preparation, $10,000415,000 <br /> TOTAL. $53,000 to$81,000 <br /> If you have any questions or comments, please contact our Stockton office at (209) 956-0254 <br /> • <br /> Advanced GeoEnmonmental, Inc <br />