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

In the context of a significant release of refrigerants such as R-12 or R-22, safety protocols are crucial because these substances can be hazardous to health in high concentrations. The correct response emphasizes the importance of both immediate evacuation and the use of appropriate breathing equipment.

Immediate evacuation of the area is essential to ensure that individuals are removed from a potentially dangerous environment. Refrigerants like R-12 and R-22 can displace oxygen in the air and may create an asphyxiation hazard, so clear and rapid evacuation helps protect those in the vicinity.

Additionally, using a self-contained breathing apparatus (SCBA) is necessary in such situations. An SCBA provides a supply of breathable air, protecting the user from inhaling harmful gases or vapors. Regular masks would not suffice in this situation because they are not designed to filter out specific harmful chemicals or provide an adequate supply of oxygen.

Combining both an immediate evacuation of the area and utilizing SCBA ensures maximum safety for anyone responding to or affected by the refrigerant leak, making it crucial to adhere to these safety guidelines.