57.22233—Actions at 0.5 percent methane (I-C mines).

If methane reaches 0.5 percent in the mine atmosphere, ventilation changes shall be made to reduce the level of methane. Until methane is reduced to less than 0.5 percent, no other work shall be permitted in affected areas.

Code of Federal Regulations

[52 FR 24941, July 1, 1987; 52 FR 27903, July 24, 1987]

CFR

57.22233—Actions at 0.5 percent methane (I-C mines).

Code of Federal Regulations