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l <br /> j <br /> -conventional pump and treat remediation under Option B. Pumping and treatment can be <br /> effective for removing floating NAPL or for intercepting a rapidly migrating plume. ; <br /> However, the present hydrogeological conditions at the Disco site do not warrant the level of <br /> intervention associated with Option B. Second, Option B would require many permits and <br /> approvals that would delay cleanup and tax valuable administrative resources. Finally, the <br /> total cost of Option A, Intrinsic Bioremediation, is less than half the cost of Option B, <br /> Pumping with Aboveground Treatment, when annual operation and maintenance costs or <br /> total net present worth are compared. <br /> I <br /> J <br /> l <br /> 'I <br /> f <br /> I <br /> a <br /> I <br /> i <br /> I <br /> I <br /> I <br /> ,1. <br /> I <br /> f SFO 10030983.DOC 4-10 <br /> ,4 <br />