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3.3.9 Leachate Monitoring and Control Leachate quantities and quality will be monitored during the postclosure period in conformance with the WDR. Final development of the landfill prior to final closure will result in seven leachate sumps that will be monitored in the postclosure period. This forms the basis for the postclosure maintenance cost estimate in Section 3.4. 3.4 Postclosure Maintenance Cost Estimates Section 21840 requires postclosure cost estimates for hiring a third -party to maintain, monitor, and inspect the closed landfill in accordance with the preliminary Postclosure Maintenance Plan requirements. Section 21840(b) requires a lump sum estimate of the annual cost for postclosure monitoring and maintenance in accordance with 2184O(c) for the following: • Site security pursuant to Section 21135 Maintenance and integrity of the final cover, including material acquisition, labor, and placement for repair due to settlement or erosion • Maintenance of vegetation, including fertilization, irrigation, and irrigation maintenance Maintenance of the drainage and erosion control systems • Monitoring and maintenance of the LFG migration monitoring and control system • Monitoring and maintenance of the LFG emission monitoring and control system Based on applicable elements in the cost template established by the California Department of Resources Recycling and Recovery (formerly the CIWMB), the estimated postclosure cost of the 185 -acre landfill is $623,000 per year, or a total of approximately $18.7 million for the 30 -year postclosure period (Table 3 and Appendix E). These costs are based on third party County - contracted services. 3.5 Financial Responsibility for Closure and Postclosure Closure costs are assured by a Closure Enterprise Fund. Postclosure costs are assured by a Pledge of Revenue. The County is the owner and operator of the landfill and as such, retains the responsibility for closure and postclosure activities. San Joaquin County submits, on a yearly basis, a letter to the regulatory agencies that includes current dollars in its Closure/Postclosure Fund. As of August 2009, the County had approximately $1.8 million in the North County Landfill Enterprise Closure Fund (Appendix F). PCMP for NCRCSL 3-6 Department of Public Works7Solid Waste O:ISan Joaquin CountylNCRCSLI1180401PCPMPIFinal ReporAPCPMP_Rev_Jan_2010.Doc County of San Joaquin — January 7, 2010