What zones are established before operations?

• A. Safe, Danger, and Excluded Zones
• B. Hot and Cold Zones
• C. Warm and Hot Zones
• D. Hot, Warm, and Cold Zones

Answer: (D)

Before any hazardous operation, a zoning framework is put in place to control exposure and movement. The Hot Zone is where the actual hazard is present and access is tightly controlled. The Warm Zone sits outside the Hot Zone and serves as a transition and decontamination area. The Cold Zone is the outermost area where personnel not involved in the hazard work can operate safely with no contamination risk. Establishing Hot, Warm, and Cold Zones ensures contaminants are contained, workflows are organized, and protective measures are effectively applied. The other options miss one or more of these zones, so the complete three-part zoning is established prior to operations.