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• 05 September 1997 <br /> AGE-NC Project No 95-0102 <br /> Page 2 of 4 <br /> • The PHS-EHD suggested that excavation and biosparging would be effective alternatives for <br /> remediation of remaining contamination <br /> AGE concurs with the PHS-EHD that excavation could be a cost effective alternative for <br /> vadose zone impact and biosparging could be a cost effective remedial alternative for <br /> petroleum-hydrocarbon impacted ground water <br /> The PHS-EHD indicated that the Revised Corrective Action Plan failed to include the <br /> construction costs associated with the proposed remedial system Based upon the <br /> approximate dimensions of the core area, we present the following estimated remediation <br /> costs <br /> EX AVATION <br /> • Most of the hydrocarbon-impacted soil at the site is present in the area of VW-1 between <br /> depths of 15 and 40 feet Assuming a 15-foot radius of impacted soil from VW-1, the <br /> total volume of impacted soil within the core area is approximately 655 cubic yards The <br /> cost for excavation, disposal/treatment and backfilling of soil at the site will range between <br /> $60 and $90 per cubic yard for a total cost between $39,300 and $58,950 Costs will be <br /> based upon actual concentrations of hydrocarbons in the excavated soil <br /> • Other costs included for excavation of hydrocarbon-impacted soil from the core area <br /> include project coordination, permitting4irnated <br /> boratory analysis, regulatory liaison and report <br /> preparation Costs for these items ar to be $5,000 to $10,000 <br /> The following is a summary of estimated costs for excavation of hydrocarbon-impacted soil from <br /> the core area of the site <br /> TASK COST <br /> Excavation, treatment/disposal and backfilling $39,300 to $58 950 <br /> Oversight, Report Preparation& Laboratory Analysis $5,000 to $10,000 <br /> TOTAL • $44 300 to $68,950 <br /> • <br /> Ads anced t;coEwiromnentai,Inc <br />