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INFORMATION SHEET GENERAL ORDER FOR STOCKTON DEEP WATER SHIP CHANNEL MAINTENANCE DREDGING PROJECTS The United States Corps of Engineers (COE) in conjunction with the Port of Stockton(PORT) have proposed to perform maintenance dredging of sediment from the Stockton Deep Water Ship Channel along the San Joaquin River. This Order serves as general waste discharge requirements for the dredging activities,land disposal of dredge sediments at specific Dredge Material Disposal (DMD) sites, and the monitoring requirements for returning decanted dredge water from the DMD sites back to the San Joaquin River. This Order regulates maintenance dredging projects on the Stockton Deep Water Ship Channel from the Stockton Turning Basin to the western boundary of the Region. Coverage under this Order can be determined by one or both of the following ways: 1. The predredge sediment constituent concentrations are less than the total and soluble constituent concentrations identified in the Discharge Applicability Table of Applicability requirement A.3. 2. The mixture of the dredge return water and the river water constituent concentrations is less than the Receiving Water Limits established in Provision F.1. The Discharge Applicability Table enables a determination to be made from the predredge analysis as to whether the proposed dredge sediments meet the 'Inert Waste' definition for two dredge disposal techniques. Land disposal with no dredge generated decant water returning to the river and for the land disposal with dredge generated decant water returning back to the river. If constituent concentrations in the pre-dredge sediments exceed the maximum sediment constituent concentrations, then additional site specific information, analyses and calculations must be performed to demonstrate the sediments are inert. This Order provides the procedure for determining whether the constituent concentrations of the river and DMD return water mixture will exceed the Receiving Water Limits (RWLs) . If the RWLs are met then this Order can be utilized for the proposed dredging project. If the RWLs are exceeded then the sediments cannot be classified as an inert waste and the proposed discharge would not be allowed under this Order. Maintenance dredging along the Stockton Deep Water Ship Channel is required on a irregular basis depending upon rainfall and runoff during the year. The sediment and water will be pumped from the dredging location in the river to one of the designated DMD sites for settling and disposal, or the sediments may be dredged by clamshell or environmental bucket and barged to the disposal or use site. The sedimentation basins at the DMD sites are designed based upon the settleability of the sediments, to minimize the carryover of suspended material. Decant water from the basins will be discharged back to the San Joaquin River. The dredged material will remain at the DMD site. The COE has tested the existing sediments at several locations along the deep water ship channel in an effort to establish anticipated chemical and physical characteristics. Compliance with the requirements contained in the Order should result in a minimal threat to water quality from the dredging and disposal of the dredged sediments. The Discharger must submit the Notice of Intent identified in Attachment B to demonstrate whether the Order is applicable to the proposed dredging project. If applicable, a Notice of Applicability signed by the Executive Officer is transmitted to the Discharger.