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County of Riverside <br /> <br /> 8 <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 />(f) 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 /> <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 /> <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 (1 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 /> <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 /> <br />9.2 INSPECTION, MONITORING, AND MAINTENANCE <br />PROGRAM <br />9.2.1 Landfill Cover <br />27 CCR 21090 <br /> <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