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WASTE DISCHARGE REQUIREMENTS - GENERAL ORDER -7- U.S. ARMY CORPS OF ENGINEERS AND THE PORT OF STOCKTON STOCKTON DEEP WATER SHIP CHANNEL MAINTENANCE DREDGING ACTIVITIES MILE 4.4 TO MILE 41.0, CONTRA COSTA, SACRAMENTO&SAN JOAQUIN COUNTIES D. EFFLUENT LEVIITATIONS (Return flow from sedimentation settling basins at the DMD Site to the river): 1. The discharge shall not have a pH less than 6.5 nor greater than 8.5. 2. The maximum daily flow shall not exceed 9.7 million gallons. E. RECEIVING WATER LEVIITATIONS: Receiving water limitations are site-specific interpretations of water quality objectives from applicable water quality control plans. As such, they are a required part of this Order. However, a receiving water condition not in conformance with the limitation is not necessarily a violation of this Order. The Board may require an investigation to determine cause and culpability prior to asserting a violation has occurred. In the following limitations, discharge is defined as the return water from the spoil basins and/or sediment released to the receiving waters from the dredger cutting head. The discharge shall not cause the following in the receiving water: 1. Concentrations of dissolved oxygen to fall below 5.0 mg/l. 2. Oils, greases, waxes, or other materials to form a visible film or coating on the water surface or on the stream bottom. 3. Oils, greases, waxes, floating material (liquids, solids, foams, and scums) or suspended material to create a nuisance or adversely affect beneficial uses. 4. Toxic substances in concentrations that produce detrimental physiological responses in human, plant, animal, or aquatic life. 5. Aesthetical undesirable discoloration. 6. Fungi, slimes, or other objectionable growths. 7. Turbidity to increase more than 10 percent over background levels. 8. The normal ambient pH to fall below 6.5, exceed 8.5, or change by more than 0.5 units.