In the United States, Acute Exposure Guideline Levels (AEGLs) for Hazardous Substances are developed by a National Advisory Committee (NAC), which includes members from Federal Agencies, State governments, chemical industry, academia, and other organizations. AEGLs are developed for durations of 10 min to 8-h, and are defined as the threshold concentrations above which the general population, including susceptible individuals, could experience health effects of specified severities following a single airborne