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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. R5-2002-0219 WASTE DISCHARGE REQUIREMENTS FOR COUNTY OF SAN JOAQUIN FOR CONSTRUCTION AND OPERATION NORTH COUNTY RECYCLING CENTER AND SANITARY LANDFILL FACILITY SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region, (hereafter Board) finds that: 1. The San Joaquin County(hereafter Discharger) owns and operates a waste management facility called the North County Recycling Center and Sanitary Landfill. The landfill is located in northeastern San Joaquin County, about 9 miles east of Lodi, in Section 21, T3N, R8E,MDB&M, as shown in Attachment A, which is incorporated herein and made part of this Order. The 320-acre facility is comprised of Assessor's Parcel Numbers (APN) 065-120-02, 065-120-03, 065-120-08, and 065-120-09. 2. The facility includes a single 185-acre Class III Waste Management Unit (Unit) comprised of lined modules. Each module is constructed on an as-needed basis, as shown in Attachment B,which is incorporated herein and made part of this Order. To date, refuse has been disposed in lined Modules 1&2, and 3. As a lined module is being filled, the next module is excavated and the soils used for daily and intermediate cover material. 3. On March 24, 1995, Order Number 95-068 approved an engineered alternative to the prescriptive liner requirements of RCRA, Subtitle D, for the liner to be constructed in Module 3 and subsequent modules. The approved engineered alternative for the base liner was a composite system consisting of a 60-mil high-density polyethylene (HDPE) geomembrane and geosynthetic clay liner(GCL), and a twelve inch thick prepared subgrade. The approved engineered alternative for the sidewall liner consisted of an 80- mil HDPE geomembrane with special features to improve construction quality assurance and prevent leaks. A geonet with an overlying geotextile and perforated HDPE collection pipes with drain rock in collection trenches were installed on the bottom liner as the LCRS. The leachate removal sump is underlain with a secondary liner with a monitoring riser. The secondary system consists of, from top to bottom: geotextile, geonet, gravel drain rock with a 12-inch HDPE monitoring pipe, geotextile, and a 60-mil HDPE geomembrane over a twelve inch thick prepared subgrade.. 4. Module 1 and 2 base liner system consists of a 60-mil HDPE liner over 6-inches compacted native soil as an approved engineered alternative to the prescriptive liner