Emergency 71 : Any occurrence such as, but not limited to, equipment failure, rupture of containers, or failure of control equipment that may or does result in an uncontrolled significant release of an airborne contaminant
University of California (Environmental Health & Safety), Safety & Industrial Hygiene Glossary of Terms, Riverside, CA, USA 2010. http://ehs.ucr.edu/safety/glossary.html, (IndHygS - Amer) {500}