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closure cost estimate is updated annually for inflation with the annual Financial Assurance submittals to the CIWMB and others. This adjustment provides an estimate in current dollars, such that the closure estimate will be equivalent to closure at the time of closure. This ensures that the cost of activities for closure will not exceed the cost estimate, as long as the method of closure and other closure activities are consistent with the Preliminary Closure Plan (Appendix I). The County will increase or decrease the closure cost estimate when changes to the Plan or changes in conditions at the landfill change the cost of closure, in accordance with Title 27 CCR Section 21820(a)(5) and (6). Revisions to the Closure cost estimate will be submitted as a revision to the Preliminary Closure/Postclosure Maintenance Plan. 8.1.2. Construction Quality Assurance Construction quality assurance (CQA) plans are prepared to assure that the facility, or component thereof, is constructed as specified in the approved design. CQA activities include inspections, verifications, audits, and evaluations of materials and workmanship necessary to assess and document the quality of the facility closure. A CQA Plan will be submitted with the Final Closure/Postclosure Plan per Title 27 Sections 20323 and 20324. The CQA Plan will include the following: 1. Introductions and Background • Project Description and Participants • Summary of Construction and Inspection Activities • Summary of Significant Design Changes made during construction 2. Construction Quality Assurance Results • Field Testing Procedures • Test Pad Testing Results (Field and Lab) • ET Cap Materials and Construction Testing • CQA Observation of Ancillary Facilities Construction (including drainage structures, roads, and fencing). • As -Built Drawing 40 Foothill Sanitary Landfill Page 59 of 62 Public Works/Solid Waste JTD County of San Joaquin — Revised 10/6/05