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BASE LEACHATE COLLECTION AND REMOVAL SYSTEM DESIGN <br /> WMU FU-04 NORTHEAST PORTION <br /> FORWARD LANDFILL <br /> PROBLEM: <br /> Size the leachate collection and removal system components for the base of WMU FU-04 in the northeast <br /> portion of the cell. <br /> GIVEN: <br /> Some of these calculations were previously performed for the WMUs D-95,D-97,D-98,D-99,D-00, D-01, <br /> D-02,and ART-03 design. The same methodology for performing the previous calculations was used for <br /> the WMU FU-04 calculations. Previous calculations are referenced and attached,where applicable. <br /> SUMMARY: <br /> 1. Required permeability of granular drainage material is 0.1 cm/sec and the granular drainage material is <br /> a minimum 0.5-ft thick. <br /> 2. Required permeability of coarse gravel is 1 cm/sec. <br /> 3. Specify 3-inch diameter, SDR I 1 HDPE pipe. <br /> 4. Specify perforation pattern for pipes of 1/4-inch diameter holes drilled at fourth points every 6-inches <br /> along pipe length. <br /> 5. Leachate shall be routed via the header pipe to the base of the central portion of WMU FU-04. <br />