MSHA - Code of Federal Regulations - 30 CFR 57.5044
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MSHA - Title 30 CFR
30 CFR § 57.5044
Respirators.


In environments exceeding 1.0 WL, miners shall wear respirators approved by NIOSH for radon daughters prior to July 10, 1995 or under the equivalent section of 42 CFR part 84 and such respirator use shall be in compliance with §57.5005.


[60 FR 30398, June 8, 1995]