The National Academies Press has released the fourteenth volume ofAcute Exposure Guideline Levels for Selected Airborne Chemicals, a publication that covers the acute exposure guideline levels (AEGLs) for seven of the approximately 400 extremely hazardous substances that have been identified by EPA. AEGLs are exposure levels below which adverse health effects are not likely to occur. These threshold exposure limits are for the general public and are applicable to emergency exposures ranging from 10 minutes to eight hours. The chemicals covered in this volume of AEGLs for Selected Airborne Chemicals include: