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WASTE DISCHARGE REQUIREMENTS UNIVERSITY OF CALIFORNIA LAWRENCE LIVERMORE NATIONAL LABORATORY SITE 300 AND U.S. DEPARTMENT OF ENERGY SAN JOAQUIN AND ALAMEDA COUNTIES 10. Discharge of cooling tower wastewater to surface waters is governed by Order No. 82-105, NPDES No. CA0081396. 11. In the summer and fall of 1984, LLNL Site 300 constructed a Class II surface impoundment to evaporate wastewater generated from the manufac- turing and processing of high explosives. The design and construction meet the criteria set forth in the California Administrative Code, Title 23, Chapter 3, Subchapter 15. The impoundment began accepting wastewater on 28 May 1985. 12. LLNL plans to conduct tests to determine the compatability of photolab rinsewater listed in Table 3 with the high explosives (HE) wastewater and with the surface impoundment' s geomembrane liner. If these tests show compatability, LLNL proposes to discharge the photolab rinsewater to the Class II surface impoundment. 13. The action to adopt waste discharge requirements for this facility is exempt from the provisions of the California Environmental Quality Act in accordance with Section 15302, Title 14, California Administrative Code. 14. The Board has notified the Discharger and interested agencies and persons of its intent to prescribe waste discharge requirements for this dis- charge. 15. The Board, in a public meeting, heard and considered all comments per- taining to the discharge. IT IS HEREBY ORDERED that Order No. 80-183 be rescinded and that the Universitv of California, Lawrence Livermore National Laboratory Site 300 and U.S. Depart- ment of Energy, in order to meet the provisions contained in Division 7 of the California Water Code and regulations adopted thereunder, shall comply with the following: A. Discharge Prohibitions: 1. The direct discharge of wastes other than cooling tower wastewater to surface waters or surface water drainage courses is prohibited. 2. The by-pass or overflow of untreated or partially treated waste is prohibited. 3. Discharges not listed in Tables 1 and 2 are prohibited.