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WASTE DISCHARGE REQUIREMENTS -4- <br /> GOLD BOND BUILDING PRODUCTS, INC. <br /> NATIONAL GYPSUM COMPANY <br /> SAN JOAQUIN COUNTY <br /> 7. The discharge shall not increase the turbidity of the receiving waters <br /> more than 10% above background levels. <br /> 8. The discharge shall not alter the ambient pH of the receiving water more <br /> than 0.5 units. <br /> 9. The discharge shall not decrease the dissolved oxygen concentration of <br /> Mormon Slough more than 0.5 mg/l below background levels. <br /> 10. The discharge shall not cause a violation of any applicable water <br /> quality standard for receiving waters adopted by the Board or the State <br /> Water Resources Control Board as required by the Clean Water Act and <br /> regulations adopted thereunder. If more stringent applicable water <br /> quality standards are approved pursuant to Section 303 of the Clean <br /> Water Act, or amendments thereto, the Board will revise and modify this <br /> Order in accordance with such more stringent standards. <br /> 11. This permit shall be modified, or alternatively, revoked and reissued, <br /> to comply with any applicable effluent standard or limitation issued <br /> or approved under Section 301(b)(2)(C) , and (D) , 304(b)(2) , and <br /> 307(a)(2) of the Clean Water Act, if the effluent standard or limitation <br /> so issued or approved: <br /> (a) Contains different conditions or is otherwise more stringent than <br /> any effluent limitation in the permit; or <br /> (b) Controls any pollutant not limited in the permit. <br /> The permit as modified or reissued under this paragraph shall also <br /> contain any other requirements of the Act when applicable. <br /> E. Provisions: <br /> 1. Neither the discharge nor its treatment shall create a nuisance or <br /> pollution as defined in Section 13050 of the California Water Code. <br /> 2. The requirements prescribed by this Order supersede the requirements <br /> prescribed by Order No. 79-186 (NPDES No. CA0003883) , adopted by the <br /> Board on 24 August 1979, which are hereby rescinded. <br /> 3. The Discharger shall comply with the "Standard Provisions and Reporting <br /> Requirements (NPDES)". dated 15 May 1986. which are part of this Order. <br />