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1.0 PRELIMINARY CLOSURE PLAN AMENDMENTR 1/& N 1.1 Introduction The following Preliminary Closure/Post-Closure Maintenance Plan Amendment Revision (PCPCMPP)for Forward Landfill (FL) updates the existing Preliminary Plan prepared by Bryan A. Stirrat & Associates, Inc. (BAS), Lewis Engineering, and GeoLogic Associates (GLA) (2002) and the subsequent revision submitted in 2004 (Amendment No. 2). Specifically,-The No. 2 includeds amour meFl+ language regarding the phased closure (partial closure) of the site including the associated reduction to the maximum extent of the landfill ever requiring closure, as well as, the accompanying closure cost estimate. Pursuant to CCR Title 272( 7 CCR), Section 21790(a), the purpose of t#is-a Preliminary Closure Plan is to provide a basis to establish a preliminary estimate of closure costs and post-closure maintenance costs for the landfill. The exist+pg2002 PCPCMP GlesuFe MamRtenanno Plan Fneets met this requirement; however, the objective of this PGPG R- Amendment No. 2 is to identify the information to gain agency approval. The information listed below is included in this PCPCMP Amendment-R: • Engineering Design Plans (Closure Sequencing Plans) presenting the anticipated staged closure of the FL, which also shows existing and proposed final limits of waste placement (liner area); • An estimate of the maximum extent of the landfill that will ever require closure at any given time during the life of the landfill based on the Staged Closure Sequencing Plans; • Anticipated closure schedule for the initial closure stage based on volumetric calculations; and • A revised closure cost estimate based on the maximum extent of the landfill ever requiring closure as based on the Closure Sequencing configuration. This 2008 revision (Amendment No 3) provides updated information reflecting the implementation of the Stage IA closure and post-closure cost estimates prepared in compliance with 27 CCR and the subsequent reduction of the maximum extent of area ever needing closure over the active life of the landfill, 1.2 Closure Sequencing The staged closure of the FL will be performed in accordance with the applicable regulatory standards included in 27 CCR, Chapters 3 and 4 and 40 CFR, Subpart F. The closure sequencing for the FL will be implemented in eight stages (Stages I through VIII) as shown on Figures 1 through 8. The closure cost estimate is 1 Forward Landfill-PCPCMP Amendment (Z:\PROJECTS\Allied Waste\JN81013 5 yr Review Plan\PCPCMP Amend 3 July 08\FinalCPRRevl.doc; Amendment No.3:7/3/ZOO8T' 'moo)