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WASTE DISCHARGE REQ*MENTS -4- GOLD BUND BUILDING PRODUCTS, INC. NATIONAL GYPSUM COMPANY SAN JOAQUIN COUNTY 9. The discharge shall not depress the dissolved oxygen concentration in Mormon Slough. 10. The discharge shall not cause a violation of any applicable water quality standard for receiving waters adopted by the Board or the State Water Resources Control Board as required by the Clean Water Act and regulations adopted thereunder. If more stringent applicable water quality standards are approved pursuant to Section 303 of the Clean Water Act, or amendments thereto, the Board will revise and modify this Order in accordance with such more stringent standards. 11. This permit shall be modified, or alternatively, revoked and reissued, to comply with any applicable effluent standard or limitation issued or approved under Section 301 (b) (2) ( C) , and (D) , 304(b) (2) , and 307( a) ( 2) of the Clean Water Act, if the effluent standard or limitation so issued or approved: (a) Contains different conditions or is otherwise more stringent than any effluent limitation in the permit; or (b) Controls any pollutant not limited in the permit. The permit as modified or reissued under this paragraph shall also contain any other requirements of the Act when applicable. E. Provisions: 1. Neither the discharge nor its treatment shall create a nuisance or pollution as defined in Section 13050 of the California Water Lode. 2. The requirements prescribed by this Order supersede the requirements prescribed by Order No. 79-186 (NPDES No. CA0003883) , adopted by the Board on 24 August 1979, which are hereby rescinded. 3. The Discharger shall comply with the "Standard Provisions and Reporting Requirements (NPDES)", dated 15 May 1986, which are part of this Order. 4. The Discharger shall notify the Regional Board as soon as it knows or has reason to believe: a. That any activity has occurred or will occur that would result in the discharge of any toxic pollutant that Knot limited in this permit, if that discharge will exceed the highest of the following "notification levels": 1) 100 micrograms per liter (ug/1 ) 2) 200 ug/l for acrolein and acrylonitrile; 500 ug/1 for 2,4-dinitrophenol and 2-methyl-4,6-dinitrophenol ; and 1 ug/1 for antimony;