ARCHIVED REPORTS_POST CLOSURE LAND USE PROPOSAL 2014

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County of Riverside 1 INTRODUCTION This Postclosure Land Use Proposal (PCLUP) has been prepared for the installation of an 8.1685 megawatt (MW) of solar array facility and associated electrical system components on and adjacent to the surface of the final soil landfill cover at West Riverside Landfill (Landfill) located in the City of Jurupa Valley, California, Figure 1. The project organization includes the County of Riverside Waste Management Department as Owner, Stronghold Engineering as the Project Proponent, and SCS Engineers (SCS) as the Engineering Consultant for permitting under the requirements of California Code of Regulations (CCR) Title 27, Section 21190 — Post- Closure Land Use for landfills last receiving waste prior to 1988. The site is regulated by the California Regional Water Quality Control Board (RWQCB); Santa Ana Region, the County of Riverside Local Enforcement Agency (LEA); and the California Department of Resources Recycling and Recovery (CalRecycle). Current permit documents are contained in Appendix A. The responsible parties (RPs) during the life of the solar project will be the County of Riverside (County) and Stronghold Engineering Incorporated(SEI) as outlined in the site lease agreement. 2 PROJECT AND LOCATION Project Description The proposed project consists of the design,procurement, and construction of an 8.1685 MW grid-tied, fixed-tilt solar project on the closed West Riverside Landfill site. The project site is comprised of multiple parcels as follows: Parcel I (APN 178-290-003) Parcel 2 (APN 178-290-006 and 178-290-013) Parcel 3 (APN 178-281-006) The total area is approximately 74 acres with three closed landfill cells encompassing most of the site. The West Riverside Landfill was operated by the Riverside County Department of Waste Management as a Class III solid waste disposal site from January 1964 until its closure in November 1983. Design plans and a construction storm water pollution prevention plan (SWPPP) will be prepared for review and approval by the County and regulatory agencies. The proposed project would consist of installing a panel racking system using weighted ballasts to avoid penetrating or damaging the landfill cover system. The racking system would be a Unirac supplied system or its equivalent and would provide the solar panel a support structure. All medium voltage wire and conduit would be surface mounted and run within and near the array field and would include explosion resistant couplings and connections. Medium voltage outside of the landfill cover footprint may be routed on overhead power poles as to be consistent with the electrical code requirements. Asphalt and concrete drainage structures exist between the landfill footprint and the property boundary. Measures to repair these features as well as avoid existing utilities will be needed. i