Chemistry and Chemical Disasters. An area bounded by natural ground contours or by a bund, and intended to retain spillage or leakage. NOTE: A pit or tank may be used to provide the same function
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}