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V August 29, 2007 This document presents the planned preparation for the rains of the winter of 2007/2008. The objective of this plan is to provide six months of operation in wet weather. Some details of this plan may be revised as needed to address conditions as they may develop as winter approaches. Winter refuse disposal is planned for two areas. The first area is the lower winter pad in Module 4 (Figure 1). This winter pad comprises of compacted and oiled road base to provide an accessible refuse disposal area when surface conditions prevent access to the landfill during the winter. Refuse will be pushed off the lower winter pad to the west and south. The lower winter pad is intended to be the primary wet weather pad through the winter of 2007-08. The second area is the upper winter pad on Module 3, now being extended. It is anticipated that the extension will be completed by end of October. It is intended that this winter pad will be available for use this winter and the next. Refuse will be pushed south from this pad (Figure 1). AZ614L•7i! U:Z011 i x41 d 1610► Planned erosion control prevention measures include: Placement of anti -erosion mats or three-step hydroseed on the new southern and western side slopes of Module 4 (Figure 1). Selection of the method of erosion control will be based on the availability of landfill staff for the placement of mats. 2 The shoulder at the top of the southern slopes of Module 4 will receive berms directing the surface flow to downcomers. These downcomers will conduct rainwater to the base of the slope, where it will then drain into the temporary retention pond south of Module 4. Water entering the retention pond will be pumped into the site drainage ditches, eventually entering the interim sedimentation pond. North County Sanitary Landfill Winterization Plan 2007/08 San Joaquin County Public Works Solid Waste Division