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Today's Terms
Friable asbestos
Definition: Any material containing more than one percent asbestos, and that can be crumbled or reduced to powder by hand pressure. (May include previously non-friable material which becomes broken or damaged by mechanical force.)
Lethal Concentration(50) (LC50)
Definition: A calculated concentration of a chemical in air to which exposure for a
specific length of time is expected to cause death in 50% of a defined experimental animal population.
Crocidolite asbestos
Definition: One of the six types of asbestos. Crocidolite or "blue asbestos," is found in specialized high temperature applications.
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