ARCHIVED REPORTS_POST CLOSURE LAND USE PROPOSAL 2014

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County of Riverside place all hardscape drainage structures; and shall promptly mitigate siltingiblockage of these structures resulting from SEI activities. Upon completion of the construction, maintenance of the cover will be the responsibility of SEI. See Section 9 of this PCLUP for maintenance requirements. 8 PROTECT PUBLIC HEALTH AND SAFETY AND PREVENT DAMAGE TO PROPERTY This section of the report lists specific requirements of 27CCR 21190 for postclosure land use changes in italics, followed by the proposed measures or explanations for the solar installation. (a) Proposed post closure land uses shall be designed and maintained to: (1) Protect public health and safety and prevent damage to structures, roads, utilities and gas monitoring and control systems. The proposed solar panel array locations are shown on Figure 4. This location is currently vegetative cover. Runoff from the cover will be directed to the drainage systems as shown on Figure 5A. The arrays are not anticipated to interfere with any of the components of the current LFG extraction system and environmental monitoring systems. There should be no interference with their continued use. (2) Prevent Public Contact with Waste, Landfill Gas (LFG), and Leachate The proposed solar arrays do not require removal of the existing cover barrier layers, including vegetative, low permeability layer, and foundation layer in the proposed locations. The arrays will have footings on top of the existing soil cover. No penetrations into the landfill cover layers will occur. The ground-mounted panels sit on metal racks anchored to concrete ballast blocks and the inverters and transformers sit on skids that are supported by concrete pads. The ballast blocks and concrete pads do not penetrate the existing cover layers. Movement of the ballast blocks or concrete pads will not damage the existing cover. Any damage to the existing cover caused by equipment will be repaired with the same cover barrier material in accordance with the Special Provisions for the Construction of the West Riverside Landfill Closure, Appendix E, page 209 of this PDF. (3) Prevent Landfill Gas Explosions None of the solar installations involve buildings or enclosures that will potentially trap landfill gas. However; electrical conduits passing through concrete slabs shall be protected by explosion proof fittings to prevent methane from passing and entering electrical panel enclosures where heat or arcing may occur. 6