SUBPART G—Ventilation (§57.8518 to §57.8535)
- 57.8518—Main and booster fans.
- 57.8519—Underground main fan controls.
- 57.8520—Ventilation plan.
- 57.8525—Main fan maintenance.
- 57.8527—Oxygen-deficiency testing.
- 57.8528—Unventilated areas.
- 57.8529—Auxiliary fan systems
- 57.8531—Construction and maintenance of ventilation doors.
- 57.8532—Opening and closing ventilation doors.
- 57.8534—Shutdown or failure of auxiliary fans.
- 57.8535—Seals.