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<br />Preliminary Closure and Postclosure Maintenance Plan 2-9 Department of Public Works/Solid Waste <br />North County Recycling Center and Sanitary Landfill County of San Joaquin <br /> <br />elements of any partial closure or final closure will also be submitted for approval by regulatory <br />agencies prior to final design. <br />Closure construction will be under the supervision of a Registered Civil Engineer or Certified <br />Engineering Geologist. This person will provide oversight and will document that construction <br />was performed consistent with the approved plans, the final construction specifications, the <br />CQA Plan, and applicable regulations and permits. Upon completion of partial or final cover <br />construction, this person will issue a certification report documenting the construction <br />procedures, testing results, and conformance with the approved plans and specifications. <br />Additionally, the certification report shall also include the as-built costs of closure in the same <br />arrangement and sequence as the estimated costs of closure included in the approved final <br />closure plan per Section 21880. <br />2.5.11 Leachate Monitoring and Control <br />Section 21790(b)(8)(F), requires a preliminary description of leachate (and landfill gas) <br />monitoring control measures pursuant to Section 21160 for closure activities. Section 21160 (c) <br />requires that during the postclosure maintenance period, the owner/operator shall ensure that <br />leachate collection and control is done in a manner that prevents public contact and controls <br />vectors, nuisance, and odors. <br />During the operational life of the landfill, leachate will be returned to the refuse away from <br />potential public contact in accordance with the WDRs and present practice. Leachate will <br />continue to be returned the refuse at a subsurface infusion point throughout the active life of the <br />landfill and in the postclosure period. This practice removes the possibility of public contact. <br />Final closure or partial closure will result in these areas being permanently closed to public <br />access. This will ensure that the public does not contact leachate. <br />The design of the final closure leachate return systems will be submitted to regulatory agencies <br />for approval with the Final Closure and Postclosure Maintenance Plan. <br />Leachate quantities and quality is currently monitored regularly in conformance with the WDR. <br />This monitoring will continue into the postclosure period. <br />Development of the landfill prior to final closure will establish a total of ten leachate sumps <br />operated, maintained, and monitored in the postclosure period (Drawing 2). This forms the <br />basis for the postclosure maintenance cost estimate. <br />2.6 Site Life and Closure Schedule <br />Section 21780 (c)(3) requires that Final Closure Plans be submitted two years prior to the <br />inception of final closure activities. In accordance with Section 21780(d)(2), implementation of <br />partial final closure activities will commence after approval of the Partial Final Closure and <br />Postclosure Maintenance Plans for those areas.