What is the primary purpose of the "Hot," "Warm," and "Cold" zones at a haz-mat scene?

The primary purpose of the "Hot," "Warm," and "Cold" zones at a haz-mat scene is to define areas of contamination risk, control, and safe zones. This zoning system is crucial for managing the response to hazardous materials incidents effectively.

The "Hot Zone" is the area immediately surrounding the release site and is where the contamination is present; access is highly restricted to only those who are properly trained and equipped to handle the hazards. The "Warm Zone" serves as a buffer between the contaminated area and the safe area, where decontamination can occur and personnel can prepare before entering or exiting the Hot Zone. Finally, the "Cold Zone" is completely free from contamination and is designated as a safe area for command and support functions, where personnel can strategize and take care of logistics.

Understanding these zones helps responders manage risks effectively, ensuring both personnel safety and proper containment or decontamination procedures during an emergency response to hazardous material incidents.