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1.0 INTRODUCTION This Plan presents the method of repair of the low-permeability layer of the closure cap due to erosion or slough failure of the landfill cover. This emergency closure cap repair work plan is prepared in accordance with Title 27 Section 21090 3C. 2.0 CLOSURE CAP REPAIR 2.1 TEMPORARY PROTECTION The purpose of temporary protection is to minimize further damage to closure cap area until a permanent repair can be affected. Temporary protection includes placing a plastic cover over the area to be repaired, and anchoring that cover with sand bags or equivalent (Photo 1). Exposed refuse (if any)will also be covered temporarily with a tarp, and disposed at the North County Sanitary Landfill as soon as possible. Small swales and berms will be constructed to direct storm water runoff away from the damaged area as needed. 2.2 PERMANENT REPAIR Unless conditions indicate otherwise, closure cap will be repaired by Installing the accepted engineering equivalent of the prescriptive closure cap: geocomposite clay liner (GCL) over a minimum two-foot thick layer of foundation soil and covered by a minimum one -foot thick layer of vegetative soil. This method is consistent with previous repairs. Repair work will be coordinated with the Local Enforcement agencies (LEA) if requested. Low-permeability layer repair will be certified by a civil engineer licensed in the State of California. 2.2 A. REPAIR METHOD First, the affected area will be cleared, and soil will be placed to provide a minimum two- foot thick foundation layer. The area will be made regular in contours to facilitate the placement of the GCL (Photo 2). After preparation is complete, a layer of GCL will be placed over and beyond the affected area (Photo 3). Emergency Closure Cap Repair Work Plan F-1 San Joaquin County Harney Lane Sanitary Landfill Department Of Public Works July 30,2009 Solid Waste Division