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BASE LEACHATE COLLECTION AND REMOVAL SYSTEM DESIGN <br />WMU FU -06 NORTHERN PORTION <br />FORWARD LANDFILL <br />PROBLEM: <br />Size the leachate collection and removal system components for the base of WMU FU -06 in the northern <br />portion of the cell. <br />GIVEN: <br />These calculations were previously performed for the WMUs D-95, D-97, D-98, D-99, D-00, D-01, D-02, <br />ART -03, FU -04, and FU -05 design. The same methodology for performing the previous calculations was <br />used for the WMU FU -06 calculations. Previous calculations are referenced and attached, where <br />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-i thick. <br />2. Required permeability of coarse gravel is 1 cm/sec. <br />3. Specify 3 -inch diameter, SDR 11 HDPE pipe. <br />4. Specify perforation pattern for pipes of 1/4 -inch diameter holes drilled at third points every 6 -inches <br />along pipe length. <br />5. Leachate shall be routed via the header pipe to a temporary tank. Once completed and approved, the <br />Is leachate can be routed to the base of the southern portion of WMU FU -06. <br />u <br />