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Today's Terms
Cancer Effect Level (CEL)
Definition:
The lowest dose of chemical in a study, or group of studies, that produces
significant increases in the incidence of cancer (or tumors) between the exposed population and its
appropriate control.
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.)
Actinolite
Definition:
Actinolite is the intermediate member; when iron is predominant the
mineral is ferro-actinolite and when magnesium is predominant, the mineral is tremolite. The iron
produces a green color that darkens as the iron content increases. Actinolite may occur in fibrous form (an
asbestos). It is not used commercially, but is a common impurity in chrysotile asbestos.
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