30 C.F.R. § 57.22220

Current through September 30, 2024

Section 57.22220 - Air passing unsealed areas (I-A, II-A, III, and V-A mines)

Air that has passed by or through unsealed abandoned or unsealed inactive areas and contains 0.25 percent or more methane shall-

(a) Be coursed directly to a return airway;

(b) Be tested daily for methane by a competent person; and

(c) Not be used to ventilate work places.

30 C.F.R. §57.22220