In the case of a large release of R-12 or R-22, what is required?

The requirement for using a self-contained breathing apparatus or leaving the area in the case of a large release of refrigerants like R-12 or R-22 stems from the potential health hazards associated with exposure to these substances. Both R-12 and R-22 are chlorofluorocarbons (CFCs) and can displace oxygen in the air, leading to asphyxiation risks. A self-contained breathing apparatus provides a reliable source of breathable air, protecting individuals from harmful inhalation of refrigerants during a significant leak.

When a large release occurs, evacuating the area is crucial to ensure the safety of personnel, particularly because these refrigerants can also cause dizziness, headache, or loss of consciousness due to the displacement of oxygen. This approach prioritizes immediate safety while allowing trained personnel to address the leak with proper equipment.

Although notifying local authorities might be necessary in some situations, the primary focus during a large release is ensuring the safety and health of individuals present at the site, which is why the use of personal protective equipment or safe evacuation is emphasized.