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Risk Analysis for Environmental Health Triage

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  • Kenneth T. Bogen

Abstract

The Homeland Security Act mandates the development of a national, risk‐based system to support planning for, response to, and recovery from emergency situations involving large‐scale toxic exposures. To prepare for and manage consequences effectively, planners and responders need not only to identify zones of potentially elevated individual risk but also to predict expected casualties. Emergency response support systems now define “consequences” by mapping areas in which toxic chemical concentrations do or may exceed Acute Exposure Guideline Levels (AEGLs) or similar guidelines. However, because AEGLs do not estimate expected risks, current unqualified claims that such maps support consequence management are misleading. Intentionally protective, AEGLs incorporate various safety/uncertainty factors depending on the scope and quality of chemical‐specific toxicity data. Some of these factors are irrelevant, and others need to be modified, whenever resource constraints or exposure‐scenario complexities require responders to make critical trade‐off (triage) decisions in order to minimize expected casualties. AEGL‐exceedance zones cannot consistently be aggregated, compared, or used to calculate expected casualties and so may seriously misguide emergency response triage decisions. Methods and tools well established and readily available to support environmental health protection are not yet developed for chemically‐related environmental health triage. Effective triage decisions involving chemical risks require a new assessment approach that focuses on best estimates of likely casualties, rather than on upper plausible bounds of individual risk. If risk‐based consequence management is to become a reality, federal agencies tasked with supporting emergency response must actively coordinate to foster new methods that can support effective environmental health triage.

Suggested Citation

  • Kenneth T. Bogen, 2005. "Risk Analysis for Environmental Health Triage," Risk Analysis, John Wiley & Sons, vol. 25(5), pages 1085-1095, October.
    • Handle: RePEc:wly:riskan:v:25:y:2005:i:5:p:1085-1095
    DOI: 10.1111/j.1539-6924.2005.00658.x
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    References listed on IDEAS

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    1. W. Slob & M. N. Pieters, 1998. "A Probabilistic Approach for Deriving Acceptable Human Intake Limits and Human Health Risks from Toxicological Studies: General Framework," Risk Analysis, John Wiley & Sons, vol. 18(6), pages 787-798, December.
    2. Kenneth T. Bogen & Robert C. Spear, 1987. "Integrating Uncertainty and Interindividual Variability in Environmental Risk Assessment," Risk Analysis, John Wiley & Sons, vol. 7(4), pages 427-436, December.
    3. Kenneth T. Bogen, 1995. "Methods to Approximate Joint Uncertainty and Variability in Risk," Risk Analysis, John Wiley & Sons, vol. 15(3), pages 411-419, June.
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    1. Kenneth T. Bogen, 2014. "Unveiling Variability and Uncertainty for Better Science and Decisions on Cancer Risks from Environmental Chemicals," Risk Analysis, John Wiley & Sons, vol. 34(10), pages 1795-1806, October.

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