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aerial topographic mapping dated March 26, 2008, and the final grading, drainage, and excavation plans (Drawings 1 and 2). Full landfill closure will be completed within two years after reaching capacity. Two years prior to final closure, the County will submit a Final Closure Plan, identifying the work included with closure and a schedule for implementation. This submittal will also include a CQA Plan and construction specifications for final closure construction activities. The County may perform partial closure of the landfill, incrementally, as filling operations are progressively completed. The County will submit Final Closure and Postclosure Maintenance Plans two years prior to the anticipated date of a partial closure phase, as needed for regulatory review. The County may submit these final plans within five years of anticipated partial closure in lieu of submitting new or updated Preliminary Closure and Postclosure Plans. Bid documents and a CQA Plan will be submitted to regulatory agencies approximately one year prior to partial closure. Within the year prior to a partial closure, a contractor will be selected and the closure construction will start and end in one construction season. Subsequent to closure, a CQA Report will be submitted with As -Built Plans to support certification of closure. 2.7 Land Use of Closed Area Section 21790(b) 5 requires a description of proposed postclosure land uses. Section 21190(b) allows development as open space and Section 21190(c) requires proposed postclosure land uses, other than nonirrigated open space, to be submitted for review and approval. The NCRCSL will be utilized as a nonirrigated open area upon closure. The closed landfill area will include landfill facilities such as drainage pipes and structures, benches, access roads, and LFG wells and collection piping. An LFG flare and/or electrical generation facility may be placed on the top deck of Module 1. Adequate foundation materials would be placed under the flare station equipment as needed. Once final grading is achieved, grass will be planted for erosion control and the site will be monitored, inspected, and maintained per the approved Postclosure Maintenance Plan. 2.8 Closure Cost Estimate Section 21790(b)(1), CIWMB, requires a closure cost estimate pursuant to Section 21820. Section 21820(a), CIWMB, requires the estimate to be based on hiring a third party contractor to close the landfill in accordance with the submitted Closure Plan. Section 21769(b)(2)(A) requires an itemized cost analysis of all actions, and their associated costs necessary to close the unit, pursuant to SWRCB promulgated requirements (20950 et. seq.). PCMP for NCRCSL 2-10 Department of Public Works/Solid Waste 0.1San Joaquin CountyWCRCSLI1180401PCPMPIFinaf ReporAPCPMP Rev_Jan_2010.Doc County of San Joaquin —January 7, 2010