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ATTACHMENT B -2- <br /> US ARMY CORPS OF ENGINEERS <br /> PORT OF STOCKTON <br /> MAINTENANCE DREDGING STOCKTON DEEP WATER SHIP CHANNEL <br /> CONTRA COSTA, SACRAMENTO, & SAN JOAQUIN COUNTIES <br /> 2. Elutriate and column settling analyses results that demonstrates the anticipated decanted dredge <br /> return water concentrations and required settling time to prevent potential impacts to receiving <br /> waters. <br /> 3. Predredge Sampling and Analysis results. The results must specify or include the following: <br /> a. Sediment sampling and analyses performed to demonstrate that the sediments are 'Inert <br /> Waste'. The following must be included: <br /> (1) Location and rationale for sampling locations, <br /> (2) Quantity of samples, (one sample per 50,000 cyds in open channel and one sample of <br /> dredge materials adjacent to each marina. <br /> (3) Predredge sediment sampling and analyses must be performed to determine total and <br /> soluble concentrations for the constituents listed in Section A.3, Applicability. <br /> Soluble sediment concentrations must be determined after performing either: a) the <br /> Waste Extraction Test(WET) method performed in accordance with the procedures of <br /> Title 22 Section 66700 California Code of Regulations, b) Sequential Batch Leach <br /> Test , or c) other as approved by the Executive Officer. De-ionized (DI) water <br /> extractant can be used in place of the citrate acid buffer solution specified in the Title <br /> 22 procedure. The pH, total dissolved solids, and electrical conductivity <br /> measurements must also be made of the extracted solution after performing the WET <br /> or approved alternate extraction procedure. <br /> (4) Test method and procedure used for each measurement/analysis, <br /> (5) Detection and reporting limits for each analysis method. <br /> (6) Sample collection technique, i.e.,grabbed using clam shell excavator, suction dredge, <br /> hand sampled using a drive sampler, etc., <br /> (7) Samples collected from contiguous channel areas to be dredged can be composited to <br /> form one composite per 100,000 cyds of dredge material. Samples collected adjacent <br /> to marinas must be analyzed individually. <br /> (8) Quality Assurance/Quality Control performed. <br /> D. Dredge Material Disposal Site <br /> 1 . Name and location of DMD site <br /> 2. Site Operation Plan which must include the following: <br /> a. Description of dredge material handling equipment, <br /> b. Procedures to be followed for decanting liquids from dredge sediments, <br /> c. To scale site Plan showing the following: <br /> (1) North arrow and scale <br /> (2) Location of sediment pond(s) and sediment receiving unit(s), <br /> (3) Sediment pond overflow structure locations, <br /> (4) Location and diameter of river outfall pipe for dredge return waters, <br />