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i i Section 1 LANDFILL EXPANSION ISSUES 1.0 INTRODUCTION The purpose of this report is to provide the City of Stockton and various regulatory agencies with backup material for the proposed Austin Road Landfill Expansion. Both the concomitant drawings and this report provide information at the preliminary conceptual design level. Additional efforts will be needed prior to actual development and construction of the expanded landfill. This particular section of the report addresses many Issues regarding the proposed landfill expansion. Landfill plans, site capacity and service life,the liner and leachate collection system, the stockpiled sludge at the landfill, cover material, surface water control, and the landfill gas control system are all discussed. Some of the information used was obtained from the Revised Preliminary Design Study Report, March 1992. That report is hereby included as part of this report as Appendix A. 1.1 LANDFILL PLANS I The existing acreage which is permitted at the Austin Road Landfill is 187.015 acres of which 1.565 acres is deeded for Newcastle Road right-of-way and 16.545 acres is dedicated as a flood control easement for Little Johns Creek for a net availability of 168.905 acres. This permitted area is divided into the fill area north of the creek, which constitutes 123.905 acres, and the borrow area south of the creek, which constitutes 45 acres. The City of Stockton owns these parcels. Furthermore, the City owns an adjacent parcel of 126.370 acres north of the current landfill. Specific facilities which will definitely be constructed on this land include the entrance and I administration facilities, which are estimated to require approximately six acres, and a temporary hazardous materials storage facility, which is estimated to require approximately one-half acre. In addition, six acres are set aside for the potential siting of a Material Recovery Facility (MRF) and 13 acres for a potential future composting or co-composting operation. Excavation for cover material as well as placement of the above described facilities will occur on this parcel;however, no solid waste fill operations will be performed on this parcel. The excavated areas will be reclaimed with 3:1 slopes and revegetated with similar materials to those used in landfill closure operations. Periodic inspections and maintenance of slopes and vegetation will be required. i The City intends to purchase a second contiguous parcel located south of the existing landfill and east of the existing 45-acre borrow area. This parcel is owned by Brocchini Farm, Inc. and is 85.582 acres in size. This area will be used for fill operations in conjunction with the 187.015 acres. I City of Stockton R W.Beek and AssociaM 2