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4.2.5 Life Cycle Cost <br /> Life cycle cost considers the costs to implement an alternative and carry it out to <br /> completion. Life cycle costs for the alternatives presented in this evaluation have been <br /> calculated and annualized for ease of comparison. <br /> The cost for the "no action" alternative consists only of future monitoring costs. The <br /> estimated additional annual cost for this alternative is $9,000 per year. This includes <br /> quarterly groundwater sampling and analysis, and required reporting. <br /> The cost for the source control alternative is estimated to be approximately $900,000 <br /> (cost of final cover), plus an additional $9,000 per year in groundwater monitoring costs. <br /> This cost is based on the cost estimate contained in the Final Closure Placa (County, <br /> February; 1995. <br /> The installation of a groundwater extraction and treatment system (see Figure 5) is <br /> estimated to have a capital cost of $400;000, plus an additional $40,000 per year in <br /> monitoring and maintenance costs. <br /> Installing a physical barrier downgradient of MW-5 (see Figure 4) has an estimated capital <br /> cost of$500,00 plus an additional$ 15,000 per year in monitoring costs. <br /> 4.3 Recommendation <br /> The following table summarizes the results of the feasibility study conducted for the Corral <br /> Hollow Sanitary Landfill. <br /> Groundwater <br /> Category No Action Source Control Extraction and Physical Barriers <br /> Treatment <br /> Implementability High High Medium Medium <br /> Effectiveness Medium High Medium Medium <br /> Permanence Low Medium High Medium <br /> Regulatory <br /> Acceptance Low High High High <br /> Life Cycle Cost Low Medium High High <br /> SAC\N�PJM3M390031.9BG-94\sdg:1 Rev.0,420/95 <br /> 0939-003.19 4-8 <br />