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HAZARD ASSESSMENT RESEARCH STRATEGY FOR OCEAN DISPOSAL
Citation:
Gentile, J., V. Jr, J. Paul, H. Walker, AND D. Miller. HAZARD ASSESSMENT RESEARCH STRATEGY FOR OCEAN DISPOSAL. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-89/231 (NTIS PB90134388).
Description:
A decision rationale for ocean disposal based on a predictive hazard assessment research strategy is presented. he conceptual framework for hazard assessment is outlined, and its major components are identified and discussed. he strategy involves the synthesis of results from separate exposure and effects components in order to provide a scientific basis for estimating the probability (risk) of harm to the aquatic environment. he exposure assessment components consists of methodologies for determining biological effects as a function of contaminant exposure concentrations. wo case studies illustrate how a hazard assessment strategy synthesizes exposure and effects information to provide a causal linkage between mass inputs of contaminants and biological effects. he first study examines sewage-sludge disposal at Deepwater Dumpsite-106. his was chosen as an example of how exposure fields for sludge contaminants can be generated with simple probabilistic models and how exposure and effects information can be synthesized to predict the relationship between mass inputs of contaminants and biological effects. he second study, which examines the disposal of dredged material in a shallow coastal site in central Long Island Sound, is a field verification program designed to test methodologies required for the acquisition of exposure and effects information. oth the laboratory and field data are synthesized to evaluate the accuracy and confidence of predictions of the individual methods, the tiered hierarchal concept, and the final prediction.