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Draft Supplemental Environmental Impact Report Page III-16 Forward Inc. Landfill 2014 Expansion Project sized based on actual leachate generation records from 1991 to 1997 and has a design capacity of - approximately 3.5 million gallons. WMU F-West, constructed in 2003, is a leachate impoundment located west of WMU FU-03 and has a design capacity of 3.4 million gallons. Both leachate impoundments are classified as Class II impoundments and contain a double liner and leachate collection system. Soil treatment and sludge drying is permitted in WMU G. WMU G is divided into G-North and G-South, located north and south of the South Fork of South Littlejohns Creek, respectively. r The WMU G units occupy the same areas as WMUs D and Future H. The WMU D units have replaced WMU G-North. As currently permitted, WMU Future H will replace WMU G-South (currently the site of the materials recovery facility)to accommodate waste disposal. — The northern portion of Forward Landfill encompasses the former Austin Road Sanitary Landfill,which began accepting municipal solid waste in 1954 and which, as mentioned above, does not contain a base liner or LCRS. Forward purchased the former Austin Road Landfill from the City of Stockton in 2000. The former Austin Road Landfill was under a Regional Water Quality Control Board (RWQCB) corrective action program for volatile organic compound (VOC) contaminated groundwater at the time of the purchase. As part of the purchase agreement,Forward agreed to continue to remediate the groundwater issues from the former Austin Road Landfill. The top of the former Austin Road Sanitary Landfill has been graded to drain to the south, and a final cover was placed on the top and on the entire northern slope. The northern portion of WMUs FU-03 to FU-08 overlies the top of the former Austin Road Sanitary Landfill. Only Class III waste is permitted for placement above the top of the former Austin Road Sanitary Landfill. The southern portion of these WMUs overlies the southern slope of the former Austin Road Landfill and the portion of the site that was known as the former Austin Road Landfill Expansion Area. The southern portion of the WMUs is constructed to meet Class II (designated waste)requirements for base liners and LCRSs and is permitted to receive designated wastes. _ Liners are placed to separate the Class 11 waste in the southern portion of WMUs FU-03 to FU- 13 from the Class III waste located in the former Austin Road Sanitary Landfill. The existing Forward Landfill facilities also include a transfer station/materials recovery facility (described under Existing Resource Recovery Facilities and Activities, on page III-14), soil borrow areas, composting areas, storage and support areas, and land application areas for cannery waste (see Figures III.0-2 and III.0-3). Permitted Waste Management Units(not yet constructed) As depicted in Figure III.0-3, future WMUs are currently permitted to the east of WMU FU-13 and WMU FU-14 and in WMU Future H area (south of the South Branch), with liners and LCRSs similar to those presently used. As discussed above, WMU Future H will replace WMU G-South (currently the site of the materials recovery facility). WMU F South is currently permitted in the southwest corner of the existing Forward Landfill, south of the South Branch. WMU F South is permitted as a Class II impoundment. All of the areas that are permitted but have not yet been constructed as waste management units have been disturbed and used for purposes ancillary to landfill and recycling operations. Thus, these areas have been partially excavated for further cell development, or used for soil borrow, resource recovery, or ancillary facilities such as stormwater and sedimentation control. r�