1. Regulations
  2. title 30
  3. chapter I
  4. part 57
  5. subpart T
  6. subjgrp 206
  7. § 57.22220

View all text of Subjgrp 206 [§ 57.22201 - § 57.22241]

§ 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.

AUTHORITY: 30 U.S.C. 811.

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

CITE AS: 30 CFR 57.22220