SITE INFORMATION AND CORRESPONDENCE

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WASTE DISCHARGE REQUIREMENTS CITY OF MANTECA -5- SAN JOAQUIN COUNTY E. Receiving Water Limitations: 1. The Discharger shall not reduce the dissolved oxygen concentration in the San Joaquin River below 5 mg/l . 2. The discharge shall not cause visible oil , grease, scum, foam, floating or suspended material in the receiving waters or watercourses. 3. The discharge shall not cause concentrations of any materials in the receiving waters which are deleterious to human, animal, aquatic, or plant life. 4. The discharge shall not cause esthetically undesirable discoloration of the receiving waters. 5. The discharge shall not cause fungus, slimes, or other objectionable growths in the receiving waters. 6. The discharge shall not cause bottom deposits in the receiving waters. 7. The discharge shall not increase the turbidity of the receiving waters by more than 10% over background levels. 8. The discharge shall not alter the normal ambient pH of the receiving water more than 0.5 units. 9. The discharge shall not increase the normal ambient pH of the receiving water more than 5°F (3°C) . 10. The discharge shall not cause the degradation of any water supply. 11. 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 Federal Water Pollution Control Act, or amendments thereto, the Board will revise and modify this Order in accordance with such more stringent standards. F. Provisions: 1. Neither the discharge nor its treatment shall create a nuisance or pollu- tion as defined in Section 13050 of the California Water Code. 2. The requirements prescribed by this Order rescind Order No . 70-134 adopted by the Board on 16 February 1970.