StacksVerified U.S. regulatory reference

30 CFR §57.5044

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
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.