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DRAFT [TENTATIVE] WASTE DISCHARGE REQUIREMENTS ORDER R5-2023-00XX 83 <br />FORWARD, INC. <br />FORWARD LANDFILL <br />SAN JOAQUIN COUNTY <br />STANDARD PROVISIONS & REPORTING REQUIREMENTS <br />21.The Discharger shall incorporate into the closure and post-closure <br />maintenance plan a cover-integrity monitoring and maintenance program <br />which includes at least the following: a periodic leak search, periodic <br />identification of other problem areas, prompt cover repair, and vegetation <br />maintenance [Title 27, § 21090(a)(4)]. <br />22.The Discharger shall complete a final cover survey upon completion of <br />closure activities for that portion of the landfill. The final cover surveys <br />shall include an initial survey and map [Title 27, § 21090(e)(1). Every <br />five years, the Discharger shall conduct a survey of the closed landfill <br />cover and submit an iso-settlement map accurately depicting the <br />estimated total change in elevation of each portion of the final cover’s low- <br />hydraulic-conductivity layer [Title 27, § 21090(e)(2)]. <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 <br />most recently approved final closure plan and CQA Plan, and in <br />accordance with all applicable regulations. The Discharger shall also <br />certify that closed landfill units shall be maintained in accordance with and <br />approved post-closure maintenance plan [Title 27, § 21710(c)(6)]. <br />24.Within 180 days of completion of closure construction activities, the <br />Discharger shall submit final documentation of closure, including the <br />Certification of Closure. The closure documents shall include a final <br />construction quality assurance report and any other documents necessary <br />to support the certification [Title 27, § 21880]. <br />25.The post-closure maintenance period shall continue until the Central <br />Valley Water Board determines that wastes remaining in the landfill unit(s) <br />no longer pose a threat to water quality [Title 27, § 20950(a)(1)]. <br />26.The Discharger shall conduct a periodic leak search to monitor of the <br />integrity of the final cover in accordance with the schedule in the approved <br />final post- closure maintenance plan [Title 27, § 21090(a)(4)(A)]. <br />27.The Discharger shall periodically inspect and identify problems with the <br />final cover including areas that require replanting, erosion, areas lacking <br />free drainage, areas damaged by equipment operations, and localized <br />areas identified in the required five-year iso-settlement survey [Title 27, <br />§ 21090(a)(4)(B)]. <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 <br />[Title 27, § 21090(a)(4)(C)].