Which of the following zones does not require the use of personal protective clothing?

The cold zone is the area that does not require the use of personal protective clothing. This zone is established at a safe distance from the hazardous site and is designated for support operations and activities that occur away from any immediate risk of exposure to hazardous materials. Personnel in the cold zone focus on tasks such as administrative work, command and control operations, and resource management, ensuring that the scene is organized and that support is available for those working in the more hazardous zones.

In contrast, the hot zone is the area where hazardous materials are present, and full protective gear is mandatory to safeguard against exposure. The warm zone serves as a transitional area between the hot zone and the cold zone, where decontamination occurs, and personnel require a certain level of protection but not to the extent required in the hot zone. The buffer zone typically refers to an area that provides an additional layer of safety and may not always be formally defined but often consists of space within which emergency responders can operate with fewer risks. Thus, the cold zone remains the only area where protective clothing is not necessary due to its separation from the immediate dangers.