ARCHIVED REPORTS_POST CLOSURE LAND USE PROPOSAL 2014

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County of Riverside Grass associated with the solar arrays will be controlled by periodic mowing beneath the solar arrays. Arrays will be best maintained by using a manual weed trimming type of device that allows selective grass removal in planter areas and near the support footings of the solar arrays. Annual mowing in early summer after plants turn brown will be coordinated with the County and implemented at minimum. 9. 3 DRAINAGE SYSTEM 27 CCR 21090(b)(3), 20365, and 21150 A supplemental maintenance program will be implemented by SEI, and verified by the County, to maintain the integrity and effectiveness of the final drainage system in accordance with the post-closure maintenance plan and RWQCB Order No. 98-99-02. The final drainage system will be inspected and evaluated on an ongoing basis for: • Evidence of erosion • Standing water • Formation of gullies • Settlement, blockage, and damage to drainage channels, structures, swales, and culverts Damage to the drainage system will be promptly addressed under direction and to the satisfaction of the County. Cause(s) for the damage will be reported in writing in the record of maintenance activities prepared by SEI and submitted to the County per Section 9.2.1. Permanent repairs and restoration will be made consistent with final closure construction specifications. Temporary repairs may be utilized until permanent repairs can be scheduled. Culverts and inlet and outlet structures will be cleaned of sediment regularly before their flow capacities are impaired. Drainage inlet grates will be kept free of debris, and drainage channels will be maintained to permit free flow. Maintenance & methodologies for repairs and restoration will be consistent with the final cover and drainage system construction specifications. Cause(s) for the damage will be reported in writing in the record of maintenance activities prepared by Stronghold and submitted to the County and regulatory agencies. Results of the inspection and summary of maintenance performed will be compiled by SEI and included in the monthly monitoring report following the inspection. 9.4 LANDFILL GAS MONITORING AND CONTROL SYSTEMS 27 CCR 20921 et seq. and 21180 (a)(2) The LFG migration monitoring system will be inspected on an ongoing basis, consistent with the requirements and 27 CCR 20933. System components will be repaired and replaced as required to maintain full system capabilities, as intended at initial installation. 10