Accession Number : ADA292610

Title :   Environmental Effects of Dredging. Simplified Approach for Evaluating Bioavailability of Neutral Organic Chemicals in Sediment.

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

Personal Author(s) : McFarland, Victor ; Clarke, Joan

PDF Url : ADA292610

Report Date : MAR 1987

Pagination or Media Count : 11

Abstract : This note outlines a tiered approach for evaluation of bioavailability of neutral organic contaminants in sediment and provides a method for the numerical expression of bioavailability. The first tier is a simple mathematical calculation, from sediment chemistry, of maximum potential bioaccumulation. If Tier I calculations indicate potential bioaccumulation of neutral organic contaminants to concentrations of concern, then Tier II laboratory tests could be conducted to determine the actual amount of bioaccumulation. In the second tier, bioaccumulation is assessed in laboratory exposures of organisms to the contaminated sediment. Comparison of the actual bioaccumulation at projected steady state to the calculated maximum potential bioaccumulation results in a measure of bioavailability. pg1. JMD

Descriptors :   *CHEMICALS, *NEUTRAL, *CONTAMINATION, *DREDGING, *SEDIMENTS, STEADY STATE, LABORATORY TESTS, COMPUTATIONS, NUMERICAL ANALYSIS, ENVIRONMENTAL IMPACT, CHEMISTRY, ORGANIC MATERIALS, CONTAMINANTS, MATHEMATICS, SIMPLIFICATION.

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE