30 C.F.R. § 57.22204 Main fan operation and inspection (I-A, II-A, III, and V-A mines).
Title 30 - Mineral Resources
Main fans shall be— (a) Provided with a pressure-recording system; and (b) Inspected daily while operating if persons are underground. Certification of inspections shall be made by signature and date. Certifications and pressure recordings shall be retained for at least one year and made available to an authorized representative of the Secretary. [52 FR, 24941, July 1, 1987, as amended at 52 FR 41397, Oct. 27, 1987; 60 FR 33722, June 29, 1995]
Title 30: Mineral Resources
PART 57—SAFETY AND HEALTH STANDARDS—UNDERGROUND METAL AND NONMETAL MINES
Subpart T—Safety Standards for Methane in Metal and Nonmetal Mines
Ventilation
§ 57.22204 Main fan operation and inspection (I-A, II-A, III, and V-A mines).
