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<br />WMU FINAL WMU FU-23 DESIGN REPORT 2-18-23 3-5 <br /> <br />SECTION 4 Surface Water Drainage <br />WMU FU-23 has been designed to minimize the amount of leachate generated within the unit by <br />grading surface waters away from the perimeter of WMU FU-23. The grading will reduce surface <br />water run-on into WMU FU-23 from adjacent areas. <br />Precipitation that falls within the confines of WMU FU-23 and contacts waste will be collected and <br />removed through the LCRS and treated as leachate. The LCRS has been sized to handle twice the <br />anticipated daily leachate volume from the 1,000-year, 24-hour storm event during filling (see <br />Section 5.2). <br />Surface drainage facilities on the final waste fill will be incorporated when final grades are met and <br />the final cap has been constructed. These drainage considerations are discussed in the JTD (Lewis <br />Engineering, 2020). <br />