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County of Riverside <br /> (8)Periodic methane gas monitoring shall be conducted inside all buildings and <br /> underground utilities in accordance with Section 20933 of Article 6, of <br /> Subchapter 4 of Title 27. <br /> No buildings are planned as part of the solar array improvements. <br /> 69 The LEA may require that an additional soil layer or building pad be placed on the final <br /> cover prior to construction to protect the integrity and function of the various layers of <br /> final cover. <br /> The proposed solar array improvements will not be in direct contact with the final cover barrier <br /> as shown on Drawing S2 in Appendix C,page 151 of this PDF. The arrays will be supported by <br /> concrete skids,which will have a layer of aggregate between the cover and the bottom of the <br /> skids. Care will be taken when moving solar panel skids. <br /> (g) All onsite construction within 1,000 feet of the boundary of any disposal area shall be <br /> designed and constructed in accordance with subparagraphs (I through 7), or in <br /> accordance with an equivalent design which will prevent gas migration into the building, <br /> unless an exemption has been issued: <br /> No buildings are planned as part of the solar array improvements. All existing structure are <br /> monitored in accordance with the 1993 Closure and Postclosure Maintenance Plan and its <br /> Amendments, (Earth Technology Corporation, 1993). <br /> 9 SUPPLEMENTAL MAINTENANCE PROGRAM <br /> 9. 1 INTRODUCTION <br /> A supplemental maintenance program will be implemented at the West Riverside Landfill after <br /> installation of the solar arrays and will continue for the life of the solar array system, <br /> approximately 20 years. This section describes the responsibilities, resources, and inspection <br /> frequency for carrying out the maintenance plan. Specific inspection and maintenance activities <br /> are detailed in subsequent Sections 9.2 through 9.5. <br /> 9.2 INSPECTION, MONITORING, AND MAINTENANCE <br /> PROGRAM <br /> 9.2. 1 Landfill Cover <br /> 27 CCR 21090 <br /> A supplemental maintenance program will be conducted by SEI, and verified by the County, at <br /> the Landfill to verify that the landfill final cover retains its integrity and effectiveness. The final <br /> 8 <br />