6.2 SR 10-03-2022 - Laserfiche WebLink

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The facility is not expected to reach final capacity in the C&D area for more than 25 years. However, this projection is subject to change based on several factors. 2.5 Closure Procedures Closure of each cell in the MSW and C&D disposal areas will be initiated upon reaching final grade according to the closure requirements in the permit. Alternatively, a temporary cap may be installed with final closure activities at a later date. The closure area surface will be brought to final grade and benched, if not already done so, according to the design plans. Appropriate buffer layers to bring surface to final grade will be placed during site operations. A summary of closure procedures is as follows: Inspect soil buffer layer and supplement as necessary. Install minimum 40-mil synthetic flexible membrane liner. Install geonet drainage layer according to the design plans. Grading and placement of 18 inches of soil fill. Placement of 6 inches of vegetation supporting topsoil. Seed and mulch the final covered area. Landfill gas management features will be installed prior to or concurrently with the placement of final cover according to the Landfill Gas Management Plan. Any changes in the design will be incorporated into a re-evaluation of closure costs and the related financial assurance calculations at the time of final cover construction. At the time of final closure of the facility, all stored material, tires, appliances, etc. will be hauled to a facility for recycling or an operating permitted disposal facility as appropriate. On -site structures which will require removal upon closure will be evaluated as the site approaches final closure. All temporary and final cover materials will comply with the requirements of applicable rules at the time of construction (see construction specifications). 2.6 Certification Of Cell/Final Closure Upon completion of activities for final closure of any cell, a closure documentation report, signed by a professional engineer registered in the State of Minnesota, stating that the cell has been closed in accordance with approved plans and specifications will be submitted to the MPCA as required by the MPCA Solid Waste Rules Part 7035.2610. Testing of the various components of the cover will be conducted and documented in accordance with the Construction Quality Assurance/Quality Control Plan in effect at the time of final closure and in accordance with applicable rules. The final closure construction documentation will be submitted to the MPCA no later than 60 days following completion of final cell closure. The documentation will contain record drawings, testing data, description of the construction process, and photographs of the major aspects of the construction phase. In addition, upon final closure of the facility, a detailed description, including a plat, will be recorded with the Sherburne County Recorder. The description will include general types and location of wastes, depth of fill, and other information of interest to future landowners. A copy of record drawings will be submitted to the Sherburne County Recorder and the MPCA. BProject Number: 227705133 2.2