Utility of Ecological Risk Assessments

Ecological Risk Assessments (ERAs) are performed at hazardous waste cleanup sites under the Comprehensive Environmental Response Compensation and Liability Act (CERCLA) program to determine the risk that contaminants pose to the environment. A number of concerns have been expressed with respect to ERAs and other studies conducted at CERCLA sites including the following: too much effort is being spent on 'studies' instead of remedies; and remedies are largely determined on the basis of human health risk and any applicable cleanup standards in place as opposed to ecological risk. As a result of these concerns, the Assistant Secretary of the Navy (Installations and Environment) asked the Center for Naval Analyses to conduct a study of the utility of ecological risk assessments. This study was to review the ERA process in general and address specific issues. This report documents the results of the study.