- (a) Availability. A mine operator shall provide an MSHA-approved, handheld, multi-gas detector that can measure methane, oxygen, and carbon monoxide to each group of underground miners and to each person who works alone, such as pumpers, examiners, and outby miners.
- (b) Qualified person. At least one person in each group of underground miners shall be a qualified person under § 75.150 of this part and each person who works alone shall be trained to use the multi-gas detector.
- (c) Maintenance and calibration. Multi-gas detectors shall be maintained and calibrated as specified in § 75.320 of this part.
[71 FR 71454, Dec. 8, 2006]