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This report documents Phases I and II to evaluate the testing and analysis of upland disposal of dredged material from the Appomattox River, Petersburg, VA. Phase I of this study evaluated the environmental and engineering effect of dredging and placing the Appomattox River sediment in the proposed Puddledock site. Phase II of this study evaluated screening of potential contaminate release to atmosphere and evaluated environmental dredging case studies conducted by the U.S. Army Corps of Engineers. The Phase I testing included physical and chemical characterization of the sediment to support design/management operations decision making and contaminant pathway analysis. Additional analyses using characterization data were performed to predict the behavior of the contaminants in various pathways. Phase 11 testing included tests that predict the potential emission release of volatiles during and after dredging. Physical characterization included a number of geotechnical tests including grain-size analyses, Atterberg limits, soil classification, specific gravity, moisture content, self-weight and standard odometer consolidation, and sedimentation testing. Chemical characterization included bulk sediment chemical analysis, toxicity characteristics leaching procedure (TCLP), and ambient water chemical analysis.
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 provides a useful, easy-to-access, annotated bibliography of essential and secondary policy and technical documents relating to dredged material disposal. A statutory and regulatory overview is presented for background information on dredged material disposal."--Page v
The existing comprehensive fixed-bed model of James River was used to study the major disposal areas used during maintenance dredging operations for the existing 25-ft-deep navigation channel to determine if the disposal areas are performing satisfactorily in terms of retaining dredged material placed therein. If the test results indicated a probable excessive rate of return of dredged material to the channel, the tests were expanded to include studies of an alternate area or areas in the same general vicinity to determine if a more suitable disposal area could be defined. The tests consisted of the release of lightweight sediments at surface depth in the disposal areas, tracing patterns of movement of material from the areas, and defining areas where these sediments would probably deposit. The results indicated that, in general, the disposal areas and operating procedures presently employed are satisfactory with respect to areas of material deposition and material retention characteristics.