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® 5.2.5 ANCILLARY FACILITIES Ancillary and support facilities will be relocated as the landfill develops. After realignment of the South Creek, and prior to the commencement of waste disposal in Phase 4, the main entrance, scale house and scales will be relocated to the Phase 5 area, as well as supporting utilities for their operation. During development (i.e., excavation) of the Phase 4 area, the existing leachate evaporation basin (WMU F-North) will be deconstructed and a replacement basin built in the southeast corner of the proposed expansion. Also, the existing stormwater sedimentation basin adjacent to WMU F-North will be relocated to the southern edge of the proposed expansion area. Finally, the scales, fee booth and other support facilities will be moved out of the Phase 5 area but within the property boundary for the last few years of operation. This final move will be required in order to construct the Phase 5 liner system and overlying waste fill. 5.2.6 SURFACE WATER CONTROL The existing and proposed drainage control facilities at the FL are designed to accommodate a 1,000-year, 24-hour storm event runoff volumes and to minimize erosion from disposal area slopes, and treatment area for land farming. The landfill has been and will continue to be graded to drain surface water away from the refuse disposal areas. The final grading of the landfill is designed so that surface water will run off the landfill via sheet flow until it is intercepted by a bench ditch. Bench ditches subsequently drain toward downdrains, which discharge to perimeter channels. The perimeter channels then drain to sedimentation basins. The interim and final surface or deck areas of the landfill will be sloped to prevent ponding and promote lateral runoff of stormwater. For purposes of the lateral expansion, the sedimentation basin currently located in the southern portion of the site will be relocated. New sedimentation basins will be located along the southern perimeter of the expansion area and in the area currently occupied by the administrative offices. Forward Landfill Project Description 5-7 BRYAN A.STIRRAT&ASSOCIATES (j:\Allied\Forward\2007.0018 Lateral Expansion\Reports\Prof Descrip\021308 Final Proj Des\Sec 5.doc:2/13/2008)