Overview of Radiation and Chemical Ecological Risk Assessment Models and Guidance for Contaminated Sites and Selected Default Input Parameters

To help meet the U.S. Environmental Protection Agency (EPA) Superfund program's mandate to protect human health and the environment from current and potential threats posed by uncontrolled hazardous substance (both radiological and non-radiological), pollutant, or contaminant releases, the Superfund program has developed an ecological risk assessment process as part of its remedial response program. This webinar will describe the process and results from a research project concerning factors that could potentially attribute to adverse ecological risk for biota due to radioactive contamination in soil or water at or near Superfund sites. This project reviewed models and guidance on assessing protection of biota to exposures from contamination at sites issued or recommended by federal, state, and foreign governments.

Gregory Latronica, Georgetown University (gpl18@georgetown.edu)
Gregory Latronica is a recent graduate of Georgetown University with a B.S. in Environmental Biology. He has a strong passion for sustainability, conservation, and science, and has a variety of laboratory and field research experience. This past year he worked as an intern exploring ecological risk assessment models for biota protection to improve the EPA's Benchmarks for Superfund sites under the guidance of Stuart Walker and Michele Burgess. This opportunity was made possible through the U.S. Department of State's Virtual Student Federal Service program. 

Stuart Walker, U.S. EPA Office of Superfund Remediation and Technology Innovation (walker.stuart@epa.gov)
Stuart Walker has been employed by U.S. EPA in Washington, DC since 1990 in either the Superfund program (the Office of Superfund Remediation and Technology Innovation) or the Office of Radiation and Indoor Air working on issues regarding the cleanup of contaminated sites. His primary area of responsibility includes serving as the Superfund program's national lead on issues regarding radioactively contaminated CERCLA sites. In this role, Stuart develops national policy for risk assessment including models, community involvement, compliance with Applicable or Relevant and Appropriate requirements (ARARs), establishing cleanup levels and management of radioactive contamination at CERCLA sites.

Moderator:

Renan Havill, U.S. EPA Technology Innovation and Field Services Division (havill.renan@epa.gov or 703-615-7735)
Renan works in the Technology Integration and Information Branch of the Technology Innovation and Field Services Division at EPA Headquarters. He supports the CERCLA Education Center and Clean Up Information Network webinars where institutional knowledge is preserved and new clean up technology is disseminated. He leads webinar series that inform regional Superfund staff of EPA Headquarters resources and manages collaborative tools developed. Renan holds a Bachelor's of Science in Environmental Science from Indiana University and a Master's of Science in Biomedical Engineering from George Washington University. He worked as a supervisory laboratory technician in a medical diagnostics lab prior to joining the EPA.

• Slide Presentation for Overview of Radiation and Chemical Ecological Risk Models, Latronica (2.56MB/PDF)
• Slide Presentation for Superfund Radiation Risk Assessment, Walker (1.08MB/PDF)

Webinar Slides and References:

• Slide Presentation for Overview of Radiation and Chemical Ecological Risk Models, Latronica (2.56MB/PDF)
• Slide Presentation for Superfund Radiation Risk Assessment, Walker (1.08MB/PDF)

Additional Resources:

• Issuance of Final Guidance: Ecological Risk Assessment and Risk Management Principles for Superfund Sites, USEPA, 1999
• CLU-IN Ecotools Page
• RAD Models:
• RESRAD-BIOTA
• ERICA
• FASSET
• ECOMOD
• EDEN
• CASTEAUR
• References:
• Ecological Risk Assessment Guidance for Superfund: Process for Designing and Conducting Ecological Risk Assessments - Interim Final
• DOE Graded Approach Guidance
• IAEA TRS 479 "Handbook of Parameter Values for the Prediction of Radionuclide Transfer to Wildlife"
• ICRP 136 "Dose Coefficients for Non-human Biota Environmentally Exposed to Radiation"
• Evaluation of Models and other Scientific Information on Protection of Biota from Radiation and Chemical Exposure

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 July 25, 2024: Overview of Radiation and Chemical Ecological Risk Assessment Models and Guidance for Contaminated Sites and Selected Default Input Parameters

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