A system to contain a hazardous material should the primary means of containment (container) fail, e. g. by leakage. The secondary container is required to hold 110% of the capacity of the primary container
Wikipedia, The Free Encyclopedia, Glossary of firefighting terms, Wikimedia Foundation, CA, USA 2012. http://en.wikipedia.org/wiki/Glossary_of_firefight ing_terms, (Fr Srvc - Amer) {510}