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SECTION 1 Introduction The Forward Landfill is an active, permitted Class II and Class III disposal facility that is owned and operated by Forward, Inc. (Forward), a subsidiary of Allied Waste, Inc. The landfill is located approximately seven (7)miles southeast of the City of Stockton, adjacent to the City of Stockton Landfill in San Joaquin County. This report presents the design and construction documents for the development of Waste Management Unit(WMU)FU-08 at the Forward Landfill. The location of WMU FU-08 is shown on the Site Plan(see the Construction Drawings in Appendix A). WMU FU-08 consists of two portions. The southern portion of WNW FU-08 is located directly east of WMU FU-06 in the area formerly known as the Austin Road Landfill borrow pit. The northern portion of WMU FU-08 is located on the top deck of the former Austin Road Landfill and is directly east of WMU FU-06. Construction will occur in two phases. The southern portion will be constructed first and, following RWQCB approval, waste placement will begin in the southern portion. The northern portion will then be constructed. The liner and leachate systems from the northern and southern portions will be connected to allow leachate from the northern portion to flow to the southern portion. The design and construction documents for WMU FU-08 were prepared in accordance with Forward's approved Joint Technical Document (JTD), Waste Discharge Requirements (WDR Order No. R5-2003-0049), and applicable regulations. The applicable state regulations include California Code of Regulations(CCR), Title 27, Division 2 (Title 27). The federal regulations are incorporated in 40 Code of Federal Regulations (CFR), Parts 257 and 258 (Subtitle D). Some of the provisions of particular importance regarding the design include: • The WMU FU-08 liner and leachate collection and removal system (LCRS) design conform to the prescriptive standards of both Title 27 and Subtitle D. • WMU FU-08 has been designed to control inundation, washout, erosion, and slope failure resulting from flooding caused by a 24-hour storm with a 1,000-year return period. • WMU FU-08 has been designed to withstand the Maximum Credible Earthquake(MCE)without damaging the liner or the leachate control systems. • Seismic studies have indicated that the Forward Landfill site is not located within 200 feet of a Holocene aged fault (GeoSyntec, January 2001) and therefore complies with the regulatory provision-regarding active faults. • The northern portion of WMU FU-08 will be constructed above the interim final cover for the existing Austin Road Landfill. It incorporates the 1-ft thick clay cover and vegetative layer of the interim final cover as its low permeability component and adds a leachate collection and removal system(LCRS)and protective operations layer. • Construction of the Interim Final Cover for the Existing Austin Road Landfill is documented in the Final Construction Quality Assurance Report for Closure Construction of the Austin Road Portion of the Forward Landfall(Vector Engineering,2002). WMU FU-08 REPORT 4-08 �_�