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SECTION 4 <br /> Surface Drainage <br /> WMU FU-17 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-17. The grading will reduce surface <br /> water run-on into WMU FU-17 from adjacent areas. <br /> Precipitation that falls within the confines of WMU FU-17 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 Preliminary <br /> Closure and Postclosure Maintenance Plan(BAS, 2002). <br /> WMU FU-17 DESIGN REPORT 3-3 <br />