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<br />STANDARD PROVISIONS AND REPORTING REQUIREMENTS, JANUARY 2012 - 15 - <br />FOR WASTE DISCHARGE REQUIREMENTS <br />FOR DISCHARGES REGULATED BY SUBTITLE D AND/OR TITLE 27 <br /> <br /> <br />iso-settlement map accurately depicting the estimated total change in elevation <br />of each portion of the final cover’s low-hydraulic-conductivity layer [Title 27, § <br />21090(e)(2)]. <br /> <br />23. Within 30 days of completion of all closure activities, the Discharger shall <br />certify that all closure activities were performed in accordance with the most <br />recently approved final closure plan and CQA Plan, and in accordance with all <br />applicable regulations. The Discharger shall also certify that closed landfill <br />units shall be maintained in accordance with and approved post-closure <br />maintenance plan [Title 27, § 21710(c)(6)]. <br /> <br />24. Within 180 days of completion of closure construction activities, the Discharger <br />shall submit final documentation of closure, including the Certification of <br />Closure. The closure documents shall include a final construction quality <br />assurance report and any other documents necessary to support the <br />certification [Title 27, § 21880]. <br /> <br />25. The post-closure maintenance period shall continue until the Central Valley <br />Water Board determines that wastes remaining in the landfill unit(s) no longer <br />pose a threat to water quality [Title 27, § 20950(a)(1)]. <br /> <br />26. The Discharger shall conduct a periodic leak search to monitor of the integrity <br />of the final cover in accordance with the schedule in the approved final post- <br />closure maintenance plan [Title 27, § 21090(a)(4)(A)]. <br /> <br />27. The Discharger shall periodically inspect and identify problems with the final <br />cover including areas that require replanting, erosion, areas lacking free <br />drainage, areas damaged by equipment operations, and localized areas <br />identified in the required five-year iso-settlement survey <br />[Title 27, § 21090(a)(4)(B)]. <br /> <br />28. The Discharger shall repair the cover promptly in accordance with a cover <br />repair plan to be included in the final post-closure maintenance plan [Title 27, <br />§ 21090(a)(4)(C)]. <br /> <br />29. Throughout the post-closure maintenance period, the Discharger shall maintain <br />the structural integrity and effectiveness of all containment structures, maintain <br />the final cover as necessary to correct the effects of settlement and other <br />adverse factors, continue to operate the LCRS as long as leachate is generated <br />and detected, maintain the monitoring systems, prevent erosion and related <br />damage of the final cover due to drainage, and protect and maintain surveyed <br />monuments [Title 27, § 21090(c)]. <br /> <br />30. Post-closure maintenance shall be conducted for a minimum period of 30 years <br />or until the waste no longer poses a threat to environmental quality, whichever <br />is greater [Title 27, § 21180(a) and Title 27, § 21900(a)].