Accession Number : ADA292623

Title :   Environmental Effects of Dredging: Wetland Animal Bioassay of Saltwater Dredged Material.

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB

PDF Url : ADA292623

Report Date : JAN 1986

Pagination or Media Count : 7

Abstract : The Clean Water Act requires that the environmental evaluation of dredged material prior to discharge or impacting the waters of the United States include the effects of disposal on contaminant concentrations through biological processes. This resulted in a need for Corps of Engineers Districts to be able to predict the potential contamination of animals that may be associated with each of these potential disposal alternatives: open- water disposal, upland disposal, and/or wetland creation. The following is a summary of a wetland animal solid-phase bioassay test applied to sediment collected from the waterway at Black Rock Harbor (BRH), Bridgeport, Connecticut. This test procedure was designed to evaluate the potential movement of toxic heavy metals and other contaminants from dredged material placed in a wetland (reduced) environment into sediment-dwelling intertidal invertebrates as a first step that may be used to evaluate contaminant mobility to animals that may colonize the dredged material. No inference on the movement of contami- nants through the wetland food web is offered at this time. JMD

Descriptors :   *ENVIRONMENTAL IMPACT, *ANIMALS, *CONTAMINATION, *DREDGED MATERIALS, *DREDGING, *SALT WATER, TEST AND EVALUATION, MOBILITY, UNITED STATES, ENVIRONMENTS, BIOLOGY, WATER, TOXICITY, TEST METHODS, CONTAMINANTS, ARMY CORPS OF ENGINEERS, DISPOSAL, CONNECTICUT, WETLANDS, FOOD, SEDIMENTS, WATERWAYS, HEAVY METALS, BIOASSAY, WEBS(SHEETS).

Subject Categories : Physical and Dynamic Oceanography
      Civil Engineering
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE