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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 Republic Services. The landfill is located approximately seven(7)miles southeast of the City of Stockton in San Joaquin County. This report presents the design and construction documents for the development of Waste Management Unit (WMU) FU-13 at the Forward Landfill. WMU FU-13 is located directly east of WMU FU-10 in the area formerly known as the Austin Road Landfill expansion area. The location of WMU FU-13 is shown on the Site Plan(see the Construction Drawings in Appendix A). The design and construction documents for WMU FU-13 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-13 liner and leachate collection and removal system (LCRS) design conform to the prescriptive standards of both Title 27 and Subtitle D. • WMU FU-13 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. • 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 base liner in WMU FU-13 will encompass approximately 4 acres and is approximately 350-feet in the north-south dimension and 450-feet in the east-west dimension. The top of clay liner on the base of WMU FU-13 will be at approximately elevation 7-feet to 13-feet,which is about 27 to 33-feet below the surrounding ground surface. A composite lining system consisting of a 2-foot-thick clay liner overlain by a 60-mil,high-density polyethylene(HDPE)geomembrane, and LCRS consisting of 1 foot of granular drainage material will be constructed on the WMU FU-13 base. The base liner of WMU FU-13, and future cells constructed to the east of WMU FU-13, will be sloped to drain at a minimum one percent grade to the east. Two temporary, composite lined sumps will be constructed at the eastern edge of the WMU FU-13 base. Leachate will be collected and pumped out of tanks located in the composite lined sumps. A side slope liner will be constructed on the northern 2:1 (horizontal:vertical) slope. The side slope liner consists of a geosynthetic clay liner (GCL) overlain by a 60-mil, single-sided textured, HDPE geomembrane, and a single-sided geocomposite drainage net(GDN). The portion of the northern WMU FU-13 slope above elevation 40-ft is at an approximately 4.5:1 ® (horizontal to vertical) grade and is underlain by the former Austin Road Landfill. To provide support for the side slope liner,an approximately 3to 4-ft thickness of subgrade fill will be placed and compacted over the portion of the former Austin Road Landfill that underlies WMU FU-13. WMU FU-13 REPORT.DOC 1-1