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REGION 4 ECOLOGICAL RISK ASSESSMENT SUPPLEMENTAL GUIDANCE: MARCH 2018 UPDATE
U.S. EPA Region 4, Superfund Division, Scientific Support Section. 9 pp, 2018

The role of an ecological risk assessment (ERA) is to (1) determine whether unacceptable risks are posed to ecological receptors from chemical stressors, (2) derive chemical levels that would not pose unacceptable risks, and (3) provide the information necessary to make a risk management decision concerning the practical need and extent of remedial action. The purpose of this supplemental guidance is to provide Regional direction for implementation of U.S. EPA's Ecological Risk Assessment Guidance for Superfund (ERAGS; EPA 1997). This guidance is appropriate for Superfund sites under the authority of CERCLA and regulated by the Office of Land and Emergency Management. The Guidelines for Ecological Risk Assessment (EPA 1998, published by the Risk Assessment Forum) provides agency-wide guidance. This supplemental guidance clarifies the National ERAGS guidance as appropriate at both RCRA and Superfund sites. https://rais.ornl.gov/documents/era_regional_supplemental_guidance_report-march-2018_update.pdf



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