29 CFR § 1926.107 - Definitions applicable to this subpart.
(a) Contaminant means any material which by reason of its action upon, within, or to a person is likely to cause physical harm.
(d) O.D. means optical density and refers to the light refractive characteristics of a lens.
(e) Radiant energy means energy that travels outward in all directions from its sources.
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