Section 096-401-6 - Post-Closure Monitoring and MaintenanceA.Post-closure Monitoring and Maintenance Plan. The licensee shall submit a post-closure monitoring and maintenance plan to the Department as part of the closure plan required in section 5. The plan must cover a period of at least 30 years following closure unless extended by the Department due to identified threats to public health, safety, or the environment.. The plan must outline how the applicant will meet the requirements of this section, include a reporting format, and provide a detailed estimate of post-closure monitoring and maintenance costs. Monitoring and inspections must be performed in accordance with the plan. Changes to this plan must be approved by the Department.B.Post-Closure Standards. The facility site may not contaminate ground water outside the solid waste boundary and may not discharge contaminants to surface water without a license pursuant to 38 M.R.S.A. §413. Facilities that have implemented or are required to implement corrective action(s) must demonstrate that successful corrective action will occur prior to the end of the post-closure period. (1)Ground Water Monitoring. Ground water must be monitored after closure in accordance with 06-096 CMR ch. 405.(2)Surface Water Monitoring. Surface waters must be monitored after closure in accordance with 06-096 CMR ch. 405.(3)Gas Monitoring. Gas monitoring must be conducted in accordance with the gas management plan approved for the closure and post-closure period under the requirements of section 5(I)(6) on a quarterly basis for the duration of post-closure care until the Department approves a decrease or cessation in monitoring frequency or parameters or both.(4)Leachate Monitoring and Maintenance. Leachate and the leachate management system must be monitored in accordance with the leachate management plan for the closure and post-closure period approved under the requirements of section 5(I)(5). Leachate collection and leak detection systems must be monitored every four months after closure for quality and flow rates until the Department approves a decrease or cessation in monitoring frequency or parameters or both. Provisions must be made for continued leachate removal and treatment until the Department approves a cessation in removal and treatment.(5)Stability and Settlement Monitoring. Stability and settlement monitoring, as applicable, must continue, and the results be reported to the Department, during the post-closure period in accordance with the plan approved under the requirements of section 5(I)(3) until the Department approves a cessation in monitoring. For facilities that have been approved by the Department in accordance with section 2(F)(1) to use strength gain of the foundation soils in the stability assessment and the factor of safety at the time of closure has not yet reached 1.5, the monitoring plan must include provisions for the owner to demonstrate that the factor of safety has reached 1.5 before the end of the first five years of the post-closure period. If this demonstration cannot be made, a plan for corrective work must be submitted to the Department for approval so that a factor of safety of at least 1.5 is attained.(6)Cover Monitoring and Maintenance. The final cover must be monitored and maintained to prevent ponding of water or erosion of cover materials and to otherwise maintain its integrity. Vegetative cover must be mowed annually to prevent the growth of deep rooted, woody plant species. Animal burrows into the cover must be eliminated and the cover repaired as needed.(7)Restricted Access. Provisions must be made to prevent the disposal of solid waste on the site and to protect the integrity of the final cover system after closure.(8)Inspections. The landfill must be inspected tri-annually after closure following the approved plan until the Department approves a decrease in frequency or cessation of inspections. Deficiencies noted during inspections must be corrected as soon as weather conditions allow.(9)Rapid Waste Mass Stabilization. Rapid waste mass stabilization approved as part of landfill closure must provide for monitoring, maintenance, and inspection of landfill facility components in accordance with the approved proposal.C.Reporting Requirements. The licensee shall submit the results of the monitoring and inspection requirements of this section to the Department. For the first two years of post-closure, the results must be submitted after each inspection. After the first two years, the results must be submitted annually until the Department approves a decrease in reporting frequency. Submittals must include the monitoring results. Deficiencies noted during inspections must be summarized along with corrective measures taken or proposed.D.Landfill Reclamation. An owner must obtain a license pursuant to 06-096 CMR ch. 400 in order to conduct landfill reclamation activities at a closed landfill.06- 096 C.M.R. ch. 401, § 6