How should a leak detected in an occupied space be handled?

• A. Evacuate occupants, ventilate, locate the leak, repair, and re-issue clearance before re-occupation.
• B. Ignore it until maintenance signs off.
• C. Evacuate only if someone smells gas.
• D. Ventilate, but do not locate the leak, and continue operations.

Answer: (A)

When a leak is detected in an occupied space, the priority is to protect people from flammable vapors and ignition risk. Begin by evacuating occupants from the area to a safe distance. Then ventilate to dilute the refrigerant vapor and reduce the concentration in the air. After the space is evacuated and ventilation is underway, locate the leak using proper tools and methods, with the system isolated and handled by trained personnel. Repair the leak, then re-check the atmosphere and provide clearance before anyone re-enters. Throughout, follow established safety procedures, keep ignition sources away, and ensure a verified safe condition before re-occupation.

This approach is best because it immediately reduces the hazard to people, limits vapor accumulation, ensures the leak is found and fixed, and only allows re-entry after a safe condition is confirmed. Ignoring the leak, delaying action, evacuating only if someone smells gas, or continuing operations without locating and repairing the leak all keep the space unsafe and risk ignition or exposure.