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3.0 CLOSURE PLAN <br /> 3.1 INTRODUCTION <br /> Closure of the Forward Landfill will be performed in accordance with the <br /> applicable regulatory standards included in 27 CCR, Chapters 3 and 4 and 40 <br /> CFR, Subpart F. The costs associated with closure of the Forward Landfill are <br /> described in Section 6.0 of this document. The improvements and systems <br /> required for closure of the Forward Landfill include the final cover and final <br /> grading plan, supported by landfill settlement and slope stability analyses, <br /> drainage and erosion control systems, landfill gas control and monitoring <br /> systems, groundwater/surface water monitoring system, site security, structure <br /> removal and decommissioning of environmental control systems. A description <br /> of these closure improvements as well as a schedule for construction is <br /> presented in the following subsections. <br /> 3.2 FINAL COVER <br /> The purpose of a final cover is to provide long-term minimization of surface <br /> water intrusion, to isolate wastes from the ground surface, and to reduce the <br /> potential for odors and gas emissions. The cover also provides a base for <br /> vegetation, which will reduce drainage velocities and erosion. In addition, the <br /> final cover configuration is designed to accommodate settlement, subsidence <br /> and the effects of seismic events throughout the minimum 30-year post-closure <br /> maintenance period and beyond. <br /> 3.2.1 FINAL COVER DESIGN <br /> 3.2.1.1 REGULATORY DESIGN STANDARDS <br /> California Final Cover Prescriptive Design Standard <br /> The minimum final cover standards for the Forward Landfill, as outlined in the <br /> closure and post-closure requirements for Class II landfills contained in 27 CCR, <br /> Section 21090 include: <br /> 0 <br /> Forward Landfill PCPCMP 3-1 <br /> L:\Allied\2000.193\Reports\FinaIPCPCMP:FL-sec3.doc:5/21/02 BRYAN A.STIRRAT&ASSOCIATES <br />