Recorded at AIHce EXP 2023
The Toxic Substances Control Act (TSCA), has been amended by the Frank R. Lautenberg Chemical Safety for the 21st Century Act. The U.S. EPA is required to perform risk evaluation for prioritized chemical agents to determine whether a chemical substance presents an unreasonable risk to health or the environment under the conditions of use. Under the Lautenberg Act amendment the TSCA definition of potentially exposed or susceptible subpopulation was changed to include workers. One of the first substances addressed under TSCA process was asbestos. The U.S. EPA performed and published the risk evaluation document for chrysotile asbestos and approved the scope of the evaluation for legacy asbestos, covering the fibers remaining in the environment. This session will: 1) explain the TSCA process using the example of chrysotile asbestos; 2) demonstrate the main content and conclusions of the risk evaluation report; 3) show how OH professionals should consider the asbestos Inhalation Unit Risk (IUR) in the context of other asbestos risk estimations; and 4) illustrate examples of risk evaluations from various exposure scenarios. The AIHA position on potential ban of chrysotile asbestos will be discussed.
Upon completion of the session, the participant will be able to:
• Describe how TSCA can affect OSH risk management.
• Discuss the current state of the TSCA risk evaluation for asbestos.
• Recognize the limitations of the EPA approaches to TSCA risk evaluation for asbestos.
• Quantify carcinogenic risk levels for chrysotile asbestos based on inhalation unit risk (IUR).
Eric Rasmuson, MHS, MS, DABT, CIH
Andrey Korchevskiy, PhD, DABT, CIH
Frank Hearl, PE