Accession Number : ADA299354

Title :   Dredging Elutriate Test (DRET) Development.

Descriptive Note : Final rept.,

Corporate Author : NORTH CAROLINA UNIV AT CHAPEL HILL DEPT OF ENVIRONMENTAL SCIENCES AND ENGINEER ING

Personal Author(s) : DiGiano, Francis A. ; Miller, Cass T. ; Yoon, Jeyong

PDF Url : ADA299354

Report Date : AUG 1995

Pagination or Media Count : 80

Abstract : The removal of contaminated sediments from waterways by dredging generates concern about the release of contaminants to the water column. The ability to predict the magnitude of these potential releases during the project planning process will improve decision making in regard to water quality impacts and controls or mitigation measures for the dredging project. This report describes the development of a simple laboratory test, the dredging elutriate test (DREl), to predict the concentration of contaminants in the water column at the point of dredging. The DRET is procedurally similar to the modified elutriate test developed by the Corps of Engineers to predict the contaminant concentrations in effluent from a confined disposal facility. The test involves mixing sediment and site water, allowing the heavier solid particles to settle, sampling and supernatant, and analyzing for dissolved and particulate bound contaminants. Results of the laboratory test compared well with field data collected while dredging New Bedford Harbor sediment, which was contaminated with polychlorinated biphenyls. Most of the contaminated loading was associated with the suspended particles. (AN)

Descriptors :   *CHEMICAL CONTAMINATION, *WATER QUALITY, *DREDGING, *SEDIMENTS, REMOVAL, LABORATORY TESTS, DECISION MAKING, COMPARISON, SOLIDS, ENVIRONMENTAL IMPACT, WATER POLLUTION, COPPER, SAMPLING, CADMIUM, ARMY CORPS OF ENGINEERS, VOLATILITY, PARTICULATES, WASTE DISPOSAL, SOLUBILITY, ENVIRONMENTAL PROTECTION, HARBORS, CONCENTRATION(CHEMISTRY), DISSOLVING, DISPERSIONS, POLYCHLORINATED BIPHENYLS, LEAD(METAL), WATER ANALYSIS.

Subject Categories : Civil Engineering
      Water Pollution and Control
      Physical Chemistry
      Solid Wastes Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE