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WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2002-0121 -2- FOR FORWARD INC. AUSTIN ROAD LANDFILL CLASS III LANDFILL SAN JOAQUIN COUNTY 6. The Discharger proposes to merge Austin Road and Forward landfills into one facility, combining the WDRs for the two sites into one. A Joint Technical Document with site development plans for the combined landfills has been submitted to the Regional Board for review. Consideration of new Waste Discharge Requirements for the resulting merged facility must wait for completion of the CEQA process and these WDRs consider only continued operation and implementation of corrective actions at Austin Road Landfill. 7. In previous Waste Discharge Requirements, the Discharger propose and the Board approved an expansion plan that included relocation of South Littlejohns Creek. This expansion and the creek relocation is a part of the plan to merge the Austin Road and Forward facilities. Permitting for the stream relocation is ongoing by other agencies. WASTES AND THEIR CLASSIFICATION 8. The Discharger proposes to discharge Class III municipal solid waste for disposal in the existing waste management unit LF-1. These wastes are classified as 'nonhazardous solid waste' or'inert waste', using the criteria set forth in Title 27. 9. Methane gas will continue to be collected and used in a power plant, developed by Pacific Energy in 1986. The power plant produces up to 760 kilowatts per hour of electrical power, which is sold to Pacific Gas &Electric (PG&E) under a long-term agreement. Improvements to the gas collection facilities may generate more gas than the power plant can use. Any gas in excess of power plant requirements will be disposed in a manner that complies with the requirements of the Air Board. DESCRIPTION OF SITE 10. Land within 1000 feet of the facility is used for agricultural and landfilling activities to the south; the Northern California Youth Center to the north; and the Pacific Energy methane gas recovery system on the west end of the site. 11. Soils immediately underlying the landfill are valley fill deposits consisting of Cretaceous to Quaternary sediments. The first 20 to 40 feet are silty clay(CL) and sandy or clayey silts (ML). Below this is an interval of sands (SM, SC, and SW) down to 55 or 60 feet. Below this are more of the silts and clays down to at least 80 feet. 12. The first water-bearing formation is approximately 60 feet below the base of the landfill. The hydraulic gradient is generally to the north/northeast.