---
kind: "section"
citation: "30 C.F.R. § 70.211"
title: "30"
number: "70.211"
heading: "Respirable dust samples; report to operator; posting."
url: "https://uscodex.org/cfr/30/70.211"
---

# §70.211. Respirable dust samples; report to operator; posting.

- (a) MSHA shall provide the operator, as soon as practicable, a report with the following data on respirable dust samples submitted or whose results were transmitted electronically, if using a CPDM, in accordance with this part:
  - (1) The mine identification number;
  - (2) The locations within the mine from which the samples were taken;
  - (3) The concentration of respirable dust, expressed as an equivalent concentration for each valid sample;
  - (4) The average equivalent concentration of respirable dust for all valid samples;
  - (5) The occupation code, where applicable; and
  - (6) **The reason for voiding any sample.**
- (b) Upon receipt, the operator shall post this data for at least 31 days on the mine bulletin board.
- (c) If using a CPDM, the person certified in sampling shall, within 12 hours after the end of each sampling shift, print, sign, and post on the mine bulletin board a paper record (Dust Data Card) of the sample run. This hard-copy record shall include the data entered when the sample run was first programmed, and the following:
  - (1) The mine identification number;
  - (2) The locations within the mine from which the samples were taken;
  - (3) The concentration of respirable dust, expressed as an equivalent concentration reported and stored for each sample;
  - (4) The sampling status conditions encountered for each sample; and
  - (5) **The shift length.**
- (d) The information required by [paragraph (c)](#c) of this section shall remain posted until receipt of the MSHA report covering these respirable dust samples.

## Notes

### Source

Source: 79 FR 24974, May 1, 2014, unless otherwise noted.

### Authority

Authority: 30 U.S.C. 811, 813(h), 957.

### Source

Source: 59 FR 8327, Feb 18, 1994, unless otherwise noted.