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1. COST <br /> ($100 x 50 AC) _ $5,000 <br /> LEACHATE MANAGEMENT <br /> Theoretically, once the final cover has been placed and the <br /> landfill has been closed, no infiltration of water will enter the <br /> landfill and no leachate will be produced. In practice, this <br /> probably will not be the case, as long term leachate may be <br /> generated by the moisture produced from the refuse decomposition. <br /> Therefore, a cost and theoretical (assumed) production rate will be <br /> applied for estimating postclosure management cost. <br /> A leachate collection and removal system will be installed in each <br /> module following excavation. During postclosure, the system will <br /> have to be maintained and monitored. It is planned to filter any <br /> leachate collected with a County-owned filtering system. <br /> 2. COST <br /> a. Collection and Disposal <br /> It is Assumed that 5 collection sumps will be sufficient <br /> for the landfill collection system and that each sump <br /> will produce approximately 1000 gallons per month. The <br /> County's cost to filter the leachate is approximately <br /> $0. 10 per gallon. <br /> (5 x 1000 x $0. 10 x 12) _ $6, 000 <br /> b. Annual cleaning <br /> The annual cleaning cost is estimated using the annual <br /> cost shown for large sites (Waste Age, March 1990) . <br /> (L.S.- Hydro clean and rodding) _ $6, 500 <br /> C. Leachate Testing <br /> Leachate testing will be done on a quarterly monitoring <br /> basis by a certified laboratory and will cost the same as <br /> ground water monitoring. Assuming there will be 5 <br /> collection points and analysis will cost $335 per test. <br /> ($335 x 5 x 4) $6 , 700 <br /> $13,200 <br /> 4 <br />