Back-up personnel should be positioned in which zone during an incident?

• A. Warm zone
• B. Hot zone
• C. Cold zone
• D. Safe zone

Answer: (C)

The correct choice is that backup personnel should be positioned in the cold zone. This zone is crucial because it is designated as the area where responders can safely operate without the risk of exposure to hazardous materials present in the hot zone. The cold zone serves as the safe space for logistics, command, and medical services. By positioning backup personnel here, they can be readily available if needed to assist in the emergency while ensuring their safety from any potential contamination or danger.

In contrast, the hot zone is the area where contamination is present, and only trained personnel with appropriate protective equipment should enter. The warm zone serves as a transition area between the hot zone and the cold zone, typically for decontamination. The safe zone, while not a term commonly defined in HAZMAT operations, likely overlaps with the cold zone's intent for safety and support roles. Overall, the cold zone is the most appropriate location for backup personnel as it ensures their safety while keeping them in proximity to the incident for potential support.