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INFORMATION SHEET <br /> GENERAL ORDER FOR STOCKTON <br /> DEEP WATER SHIP CHANNEL <br /> MAINTENANCE DREDGING PROJECTS <br /> The United States Corps of Engineers (COE) in conjunction with the Port of Stockton <br /> (PORT) have proposed to perform maintenance dredging of sediment from the Stockton Deep <br /> Water Ship Channel along the San Joaquin River. This Order serves as general waste <br /> discharge requirements for the dredging activities, land disposal of dredge sediments at <br /> specific Dredge Material Disposal (DMD) sites, and the monitoring requirements for <br /> returning decanted dredge water from the DMD sites back to the San Joaquin River. This <br /> Order regulates maintenance dredging projects on the Stockton Deep Water Ship Channel <br /> from the Stockton Turning Basin to the western boundary of the Region. Coverage is <br /> applicable when dredge sediments do not exceed the maximum sediment constituent <br /> concentrations established in this Order. Maximum dredge sediment constituent <br /> concentrations are established for two conditions; maximum sediment concentrations for land <br /> disposal as inert waste without returning decanted dredge generated water to the river and <br /> for the maximum sediment concentrations for land disposal as inert waste and for returning <br /> decanted dredge generated water back to the river. <br /> Maintenance dredging along the Stockton Deep Water Ship Channel is required on a irregular <br /> basis depending upon rainfall and runoff during the year. The sediment and water will be <br /> pumped from the dredging location in the river to one of the designated DMD sites for <br /> settling and disposal. The sedimentation basins at the DMD sites are designed based upon <br /> the settability of the sediments, to minimize the carryover of suspended material. Decant <br /> water from the basins will be discharged back to the San Joaquin River. The dredged <br /> material will remain at the DMD site. <br /> The COE has tested the existing sediments at several locations along the deep water ship <br /> channel in an effort to establish anticipated chemical and physical characteristics. <br /> Compliance with the requirements contained in the Order should result in a minimal threat to <br /> water quality from the dredging and disposal of the dredged sediments. The Discharger must <br /> submit the Application Requirements identified in Attachment B to demonstrate whether the <br /> Order is applicable to the proposed dredging project. If applicable, a Notice of Applicability <br /> signed by the Executive Officer is transmitted to the Discharger. <br /> Sediment Constituents of Concern (COC) <br /> The maximum dredge sediment constituent concentrations identified in Section A.3 were <br /> developed from the COE's sediment and elutriate analysis results from several locations <br /> along the Deep Water Ship Channel, San Joaquin River water quality data, beneficial uses, <br /> water quality criteria and water quality objectives. The sediments were analyzed for the <br /> following constituents: Trace Metals, Pesticides, PCBs, Semi-Volatile Organic Constituents, <br /> Tributyl Tin, and Total Recoverable Petroleum Hydrocarbons. The decant water from <br /> sediment elutriate tests were also tested for the above constituents plus the following <br />