Oxygen-deficient atmosphere

Hazards

• An atmosphere containing insufficient oxygen for safe unprotected breathing and function.

Controls

• Use calibrated testing, ventilation, access control, trained entrants, and rescue capability.

Personal protective equipment

• Select task-specific PPE only after hazards and higher-order controls have been evaluated.

Regional considerations

• Applicable law, permits, collective agreements, venue rules, and qualified-person decisions take precedence.

In practice

Use calibrated testing, ventilation, access control, trained entrants, and rescue capability.

Explore related entries

• Confined space
• Carbon-monoxide hazard