Underground Only

1. CFR
2. ›
3. Title 30
4. ›
5. Chapter I
6. ›
7. Part 57
8. ›
9. Subpart G
10. ›
11. Subject Group Underground Only

Sections

Section numbering in the official eCFR can be non-consecutive. Omitted section numbers are not treated here as reserved unless the source explicitly labels them that way.

• 57.8520
  § 57.8520 Ventilation plan.
• 57.8525
  § 57.8525 Main fan maintenance.
• 57.8527
  § 57.8527 Oxygen-deficiency testing.
• 57.8528
  § 57.8528 Unventilated areas.
• 57.8529
  § 57.8529 Auxiliary fan systems.
• 57.8531
  § 57.8531 Construction and maintenance of ventilation doors.
• 57.8532
  § 57.8532 Opening and closing ventilation doors.
• 57.8534
  § 57.8534 Shutdown or failure of auxiliary fans.
• 57.8535
  § 57.8535 Seals.