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WASTE DISCHARGE REQUIREMENTS -4- SOUTHWEST HIDE COMPANY SURFACE IMPOUNDMENT CLOSURE SAN JOAQUIN COUNTY a. require a higher level of containment than provided by the unit, b. are 'restricted hazardous wastes' , or C. impair the integrity of containment structures, is prohibited. B. Discharge Specifications: GENERAL SPECIFICATIONS 1 . Wastes shall only be discharged into, and shall be confined to, the surface impoundments or the recycling system specifically designed for their containment, shown on Attachment "B" . 2. A minimum separation of 5 feet shall be maintained between wastes or leachates and the highest anticipated elevation of underlying ground water, including the capillary fringe. 3. Prior to the discharge of waste to a waste management unit (WMU) , all wells within 500 feet of the unit shall have sanitary seals which meet the requirements of the Solano County Health Department or shall be properly abandoned. A record of the sealing and/or abandonment of such wells shall be sent to the Board and to the State Department of Water Resources. 4. The Discharger shall implement the waste characterization and load checking procedures described in the Discharger's 12 December 1990 technical report to preclude the discharge of 'hazardous waste' and unauthorized waste at this facility until a revised load checking program is approved by Board Staff. General WMU Construction 5. Water used for facility maintenance shall be limited to the minimum amount necessary for dust control , moisture conditioning for repair of clay liners and clay cover soil , and to establish vegetation to prevent erosion. 6. Materials used to construct liners shall have appropriate physical and chemical properties to ensure containment of discharged wastes over the operating life, closure, and post-closure maintenance period of the WMUs.