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TECHNICAL MEMORANDUM <br /> Page. 2 <br /> June 3, 1992 <br /> ® SAC31583.AC.ZZ ; <br /> Preparation of this technical memorandum to summarize the exploration <br /> methods, subsurface conditions, and results of stability and settlement analyses <br /> Site"Description <br /> Forward Landfill is located at 9999 South Austin Road, in San Joaquin County, about 7 <br /> miles southeast of Stockton, California. The existing landfill includes waste management <br /> units (MWUs) for waste treatment and/or disposal, a transfer station/resource recovery <br /> facility for separating, sorting, and recycling activities, and storage and support areas. <br /> Several MWUs at the Forward Landfill are currently in operation. <br /> The Forward Landfill site is divided .by the South Fork of South Littlejohns Creek (South <br /> Fork), as shown in Figure 1 (attached). Other than the South Fork and existing MWUs, the <br /> site is relatively level, with ground surface elevations ranging from 33 feet to 40 feet above <br /> mean sea level (msl). <br /> Project Description ONVA <br /> The proposed extension of Forward Landfill includes placement of additional waste fill - <br /> material over approximately 80 acres, extending from the South Fork to the north property y <br /> line and from existing WMUs D-88, D-89, and E to the west property line. Refuse will also <br /> be placed in the area south of the South Fork. Figure 1, attached, shows the proposed <br /> landfill extension configuration: As shown in this Figure, the proposed landfill extension will <br /> include placement of additional waste fill material over some existing MWUs. The proposed <br /> landfill extension plans currently include placement of a maximum of approximately 200 feet <br /> of refuse fill over an 80 acre area. <br /> Prior to constructing the liner and placing refuse fill, most of the site will be excavated to a <br /> depth of approximately 25 feet below the existing ground surface (approximately elevation <br /> 15 feet). The proposed base excavation plan extends from approximately WMU D-89 to the <br /> west.property line, and from South Little Johns Creek to the north property line. The <br /> approximate limits of the proposed future base excavation are shown in Figure 1. The <br /> proposed future base excavation will provide native soil far the clay liner construction and <br /> for daily cover material. The cut slopes for the proposed base excavation are 3:1 <br /> (Horizontal to Vertical). <br /> The base excavation and cut slopes for the proposed base excavation area will be lined with <br />