Foam (Class A) : A chemical concentrate added to water that combines foaming and wetting agents specifically formulated for extinguishing wildfires. The foam is biodegradable, non-toxic and is used at very low concentrates
Australian Fire Authorities Council AFAC, Glossary Of Rural Fire Terminology, East Melbourne, Victoria, Australia 2011. http://www.docstoc.com/docs/31795028/AUSTRALASIAN- FIRE-AUTHORITIES-COUNCIL-GLOSSARY-OF-RURAL-FIRE, (For Fr - Brit) {7}