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FORWARD LANDFILL NON-WATER CORRECTIVE ACTION PLAN been permitted. This report summarizes the environmental conditions at the Forward Landfill and presents a calculation of potential corrective action costs to address a known or reasonably foreseeable non-water release at the site. 1.1 BACKGROUND The Forward Landfill is located at 9999 South Austin Road in Manteca, California(Figure 1). The current Forward Landfill combines the Forward Landfill (Forward Unit) and the Austin Road Landfill (Austin Unit) into one facility, which is owned and operated by Forward, Inc. The combined site currently encompasses 567 acres, of which approximately 388 acres have been landfilled. Refuse disposal operations at the Forward Unit began in 1973 at Waste Management Units (WMUs) A and B along the eastern side of the unit,before landfill liner requirements were implemented. Engineered liner containment systems were constructed in the remaining waste cells as refuse disposal expanded to the west across the site. With the exception of WMU-A, waste disposal at the Forward Unit was limited to non-hazardous solid waste, inert waste, and certain designated wastes (ash, petroleum hydrocarbon contaminated soil, and asbestos). WMU- A covers approximately 8 acres where designated wastes and hazardous waste sludge were placed between the late 1970s and 1984. WMU-A was closed and capped in 1989. Waste disposal at the Austin Unit began in 1954 along the northern side of the unit, before landfill liner requirements were implemented. Engineered lined containment systems have been constructed in the remaining waste cells (FU-03, FU-04, FU-05, FU-06, FU-08, and FU-10) continuing in an easterly direction. Waste disposal at the Austin Unit has been limited to non-hazardous solid waste, inert waste, and certain designated wastes (ash,petroleum hydrocarbon contaminated soil, and asbestos). 2.0 GEOLOGIC & HYOGEOLOGIC OVERVIEW The geology and hydrogeology of the Forward Landfill have been detailed in several reports including Kleinfelder&Associates (1991), and California Department of Water Resources (2003). These studies confirm that geologic and hydrogeologic conditions at the Forward Landfill are consistent with regional conditions. 2.1 GEOLOGIC CONDITIONS The Forward Landfill is located near the center of the Great Valley Geomorphic Province in the region locally referred to as the northern San Joaquin Valley. The Great Valley is an elongated asymmetrical structural trough bounded on the east by the Sierra Nevada and on the west by the Coastal Range. In the northern San Joaquin Valley, nearly 8000 feet of sediments have N1:\2011-012MWFA REPORT.DOCX 2 Geo-Logic Associates