When can you re-enter a space after a warning or danger alarm?

• A. With respiratory protection or when certified gas free by the Gas Free Engineer (GFE)
• B. Immediately after alarm stops
• C. Only after a full purge
• D. After receiving approval from supervisor

Answer: (D)

After a warning or danger alarm, you re-enter only with approval from your supervisor. This ensures the space has been reassessed, hazards are under control, and the appropriate safety measures are in place, including any required permits, rescue readiness, and proper briefing for the team. The supervisor reviews the situation and confirms that readings, ventilation, and controls meet safe conditions before anyone goes back inside. Relying on a gas-free certificate or re-entering immediately after the alarm ends can be unsafe because hazardous conditions may linger or change; a formal restart and authorization are needed. Purging might be part of the plan, but it does not automatically authorize re-entry without supervisor approval.