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WASTE DISCHARGE REQUIREMENTS GENERAL ORDER -6- US ARMY CORPS OF ENGINEERS PORT OF STOCKTON MAINTENANCE DREDGING STOCKTON DEEP WATER SHIP CHANNEL CONTRA COSTA, SACRAMENTO, & SAN JOAQUIN COUNTIES dredging spoils for the Stockton Deep Water Ship Channel, or to a DMD site with Waste Discharge Requirements approved for accepting dredge materials. 2. The discharge to DMD sites shall consist solely of inert waste as defined by Chapter 15, Division 3, Title 23, of the CCR. 3. The discharge of any materials generated during dredging operations shall not cause a nuisance or condition of pollution as defined by the California Water Code. 4. The discharge shall not cause the degradation of any water supply. 5. The discharge to the DMD site shall consist solely of sediment and water produced from dredging operations. 6. Appropriate soil erosion control measures shall be made and maintained to prevent discharge of sediment to surface waters or surface water drainage courses from disturbed areas at the DMD sites. D. EFFLUENT LIMITATIONS (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 average daily flow shall not exceed 8.7 million gallons. 3. Survival of aquatic organisms in 96-hour bioassays of undiluted waste shall be no less than: Minimum for any one bioassay - - - - - - - - - -70% Median for any three or more consecutive bioassays- - - -90% E. RECEIVING WATER LIMITATIONS: Receiving water limitations are site-specific interpretations of Receiving Water Limits 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.