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BIOASSESSMENT METHODS FOR DETERMINING THE HAZARDS OF DREDGED MATERIAL DISPOSAL IN THE MARINE ENVIRONMENT
Citation:
Gentile, J., G. Pesch, K. Scott, W. Nelson, W.R. Munns, AND J. Capuzzo. BIOASSESSMENT METHODS FOR DETERMINING THE HAZARDS OF DREDGED MATERIAL DISPOSAL IN THE MARINE ENVIRONMENT. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-91/023 (NTIS PB91176768).
Description:
Approximately 325 million m3 of sediment are dredged annually for navigation purposes in the United States. f this, 46 million m3 are disposed of annually in the ocean (Peddicord, 1987). ecisions regarding the ocean disposal of dredged material result, in large part, from bioassessment-based estimates of contaminant exposure and ecological impacts (U.S. EPA/COE, 1977). redictions of impacts for an individual dredging project are estimated from laboratory determinations of the magnitude, bioavailability, bioaccumulation, and hazards (toxicity) of dredged material contaminants. isposal site management of individual and multiple dredging projects requires monitoring for contaminant transport, availability and accumulation in biota, and the hazards to ecologically and commercially important populations. ecause of their importance, suites of bioassessment methods representing several levels of biological organization have been proposed for predicting and assessing the hazards resulting from the ocean disposal of dredged material (Gentile and Scott, 1987; Gentile et al, 1988c).
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BIOASSESSMENT METHODS FOR DETERMINING THE HAZARDS OF DREDGED MATERIAL DISPOSAL IN THE MARINE ENVIRONMENT