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This technical note describes the application of appropriate physical, engineering, chemical, and biological tests described in Technical Note DOER-C2 (Winfield and Lee 1999) for characterizing and determining the potential for beneficial uses of dredged material in aquatic, wetland, and/or upland environments. The characterization and testing of a dredged material must be matched to a particular beneficial use. A number of physical, engineering, chemical, and biological tests have been described in Technical Note DOER-C2 (Winfield and Lee 1999) to characterize and aid in making decisions about the potential beneficial reuse of the dredged material. Appropriate characterization tests are listed in Tables 1 through 3. Normally, a sediment is tested and evaluated according to the USACEfU. S. Environmental Protection Agency (USEPA) (1992) prior to dredging and disposal. Those data can be used in the initial evaluation of potential beneficial uses of the dredged material, indicating, for example, the presence of contaminants. However, the placement of dredged material in a CPF and the physicochemical changes occurring in the dredged material can result in changes in relation to the nature and location of contaminants within the CPF. Normally, contaminants when present in the dredged material tend to be associated with the finer grain sized particles. Even though most of the tests identified in Tables 1 and 2 were initially designed for soils, they can be applied to dredged material because of its soil-like nature.
This document is intended to serve as a consistent "roadmap" for U.S. Army Corps of Engineers and U.S. Environmental Protection Agency personnel in evaluating the environmental acceptability of dredged amterial management alternatives. Specifically, its major objectives are to provide: A general technical framwork for evaluating the environmental acceptability of dredged material management, alternatives (open-water disposal, confined (diked) disposal, and beneficial uses). Additional technical guidance to augment present implementation and testing manuals for addressing the environmental acceptability of available management options for the discharge of dredged material in both ope water and confined sites. Enhanced consistency and coordination in USAC/EPA decision making in accordance with Federal environmantl statutes regulating dredged material management.
This document is intended to serve as a consistent "roadmap" for U.S. Army Corps of Engineers and U.S. Environmental Protection Agency personnel in evaluating the environmental acceptability of dredged amterial management alternatives. Specifically, its major objectives are to provide: A general technical framwork for evaluating the environmental acceptability of dredged material management, alternatives (open-water disposal, confined (diked) disposal, and beneficial uses). Additional technical guidance to augment present implementation and testing manuals for addressing the environmental acceptability of available management options for the discharge of dredged material in both ope water and confined sites. Enhanced consistency and coordination in USAC/EPA decision making in accordance with Federal environmantl statutes regulating dredged material management.
This manual is a resource document providing technical guidance for evaluation of potential contaminant migration pathways from confined disposal facilities (CDFs). Disposal of dredged material in CDFs is one of the most commonly considered alternatives for material deemed unsuitable for conventional open water disposal because of potential contaminant impacts and is also an option commonly considered for disposal of contaminated sediments dredged for purposes of sediment remediation. If contaminated sediments are placed in a CDF, consideration of pathways for migration of contaminants from the site and potential contaminant impacts may be required. A suite of evaluation procedures and laboratory test procedures has been developed to evaluate CDF contaminant pathways and is presented in detail in this manual. A tiered testing and evaluation approach is used. The Tier I evaluation determines the need for pathway evaluations, pathways of concern, contaminants of concern, and which pathways require more detailed evaluations based on existing information. Tier II evaluations consist of determining the need for management actions derived from very conservative techniques that use the chemical, physical, and biological characteristics of the dredged material and basic information about the CDF. Tier III focuses primarily on definitive evaluations, including pathway testing. Tier IV, which should rarely be needed for navigation projects, includes formal quantitative risk assessment designed to answer specific, well-defined questions.