---
kind: "section"
citation: "30 C.F.R. § 57.5045"
title: "30"
number: "57.5045"
heading: "Posting of inactive workings."
url: "https://uscodex.org/cfr/30/57.5045"
---

# §57.5045. Posting of inactive workings.


Inactive workings in which radon daughter concentrations are above 1.0 WL, shall be posted against unauthorized entry and designated by signs indicating them as areas in which approved respirators shall be worn.


## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.