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Environmental Assessment

Summary of U.S. EPA Dioxin Workshop − Feb 2009

Notice

This document provides a summary of the Scientific Workshop to Inform EPA’s Response to National Academy of Science Comments on the Health Effects of Dioxin in EPA’s 2003 Dioxin Reassessment. The goals of the Dioxin Workshop were to identify and address issues related to the dose-response assessment of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD).

Report Information

The U.S. Environmental Protection Agency (U.S. EPA) and Argonne National Laboratories, through an inter-Agency agreement with the U.S. Department of Energy, convened a workshop that identified and addressed issues related to the dose-response assessment of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD). This report summarizes the discussions and conclusions from that workshop, which was held on February 18−20, 2009, in Cincinnati, Ohio.

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Glenn E. Rice
  • by phone at:   513-569-7813
  • by fax at:   513-487-2539
  • by email at:  rice.glenn@epa.gov

Background

In 2003, the U.S. Environmental Protection Agency (U.S. EPA) released a draft report titled Exposure and Human Health Reassessment of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin (TCDD) and Related Compounds (U.S. EPA, 2003). At the request of the U.S. EPA, the National Academy of Sciences (NAS) prepared a report, Health Risks from Dioxin and Related Compounds: Evaluation of the EPA Reassessment (NAS, 2006), which made a number of recommendations to improve the U.S. EPA’s reassessment of TCDD (U.S. EPA, 2003). The U.S. EPA and Argonne National Laboratories, through an inter-Agency agreement with the U.S. Department of Energy, convened this scientific workshop (Dioxin Workshop) on February 18−20, 2009, in Cincinnati, Ohio.

The goals of the Dioxin Workshop were to identify and address issues related to the dose-response assessment of TCDD. This Workshop, which was announced in the Federal Register and open to the public, was convened specifically to ensure that the U.S. EPA’s response to the NAS recommendations focuses on the key issues and reflects the most meaningful science. This document provides a summary of the Scientific Workshop to Inform EPA’s Response to National Academy of Science Comments on the Health Effects of Dioxin in EPA’s 2003 Dioxin Reassessment.

History/Chronology

Oct 2004EPA released the NAS Review Draft of the Dioxin Assessment, in preparation for the first NAS panel review meeting (held 11/22 -23/04), in Wash., DC.
Jul 2006NAS released Health Risks from Dioxin and Related Compounds: Evaluation of the EPA Reassessment.
Nov 2008EPA released a preliminary search list to address EPA's Reponses to the NAS comments on the 2003 Dioxin Reassessment report.
Feb 2009EPA hosted a 3-day public, scientific workshop to assist EPA in responding to the NAS reports on Dioxin. [ Workshop Announcement and details]
May 2009EPA released the 2009 Science Plan for activities related to Dioxins in the environment.
Jun 2009EPA released the summary report from the Draft Dioxin Reassessment Workshop.

Next Steps

This is the Final document.

Citation

U.S. EPA. Summary of U.S. EPA Dioxin Workshop − Feb 2009. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-09/027, 2009.

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