Ambient Air 5 : The air outside buildings and structures. This does not refer to indoor air, air in the workplace, or contaminated air discharged from a source
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}