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Herding Lawson Associates <br /> June 17, 1988 <br /> 4167,218.02 <br /> Mr. James M. Kerr, Jr. , P.G. <br /> Exxon Company, USA <br /> Page 3 <br /> - Develop and sample the monitoring wells <br /> - Prepare report <br /> Estimated cost: $10,000 to $20,000 <br /> Phase II <br /> If review of data indicates that a release of contaminants from a tank or <br /> line leak, spillage, or other source has occurred: <br /> - Determine lateral and vertical extent of contamination <br /> - Evaluate impact of contamination on soil and ground-water quality <br /> - Evaluate remediation measures if warranted <br /> - Prepare report <br /> Estimated cost $50,000 to $100,000 <br /> Phase III <br /> If after the completion of Phase II it is warranted to implement remedial <br /> measures to comply with state and local regulations, the following options <br /> are available: <br /> - Soil removal and disposal or treatment by aeration <br /> - In situ air venting <br /> - In situ bioremediation <br /> - Ground-water extraction with treatment by carbon filtration, air <br /> stripping or bioremediation <br /> Estimated cost: $200,000 to $900,000 <br /> Depending on site conditions, investigation costs could be as little as <br /> $10,000. However, if all three phases of work are required, the total <br /> estimated cost could range between $250,000 and $1,000,000. <br />