Accession Number : ADA265652


Title :   Assessing Ecological Risk Using Exposure Response Models. The Allen Harbor Case Study


Descriptive Note : Professional paper,


Corporate Author : NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA


Personal Author(s) : Munns, W R , Jr ; Mueller, C ; Johnston, R K ; Nelson, W G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a265652.pdf


Report Date : Nov 1992


Pagination or Media Count : 3


Abstract : Exposure-response models were developed as the final phase in a multiyear case study to assess risks to marine ecosystems in Allen Harbor, RI associated with land-based hazardous waste sites. These models were developed for acute and chronic responses of marine species exposed to sediments, sediment extracts, and ground water associated with a landfill adjacent to Allen Harbor. Serial dilutions of these media were characterized chemically and presented in the laboratory to seven species representative of taxa found in the harbor. The toxicological endpoints generally responded in a classic sigmoid fashion with increasing exposure medium concentration, although variation was observed in endpoint sensitivity. The resulting exposure-response models will be useful in defining ecological risk at current chemical stressor concentrations, in identifying remediation levels required to reduce risk to acceptable levels, and in predicting future risk associated with changes in stressor concentration.


Descriptors :   *WATER POLLUTION , *ECOSYSTEMS , *HAZARDOUS WASTES , REPRINTS , RISK , WASTE WATER , MODELS , CHEMICALS , DILUTION , ECOLOGY , HARBORS , SEDIMENTS , LANDFILLS , MEDIA , CASE STUDIES , SENSITIVITY , VARIATIONS , CHEMISTRY , GROUND WATER


Subject Categories : Ecology
      Water Pollution and Control


Distribution Statement : APPROVED FOR PUBLIC RELEASE