Margin of Safety 6 : The ratio between a derived exposure level that is considered to be without an appreciable risk of an adverse health effect and the estimated exposure of a population
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}