In the hazard-control zone, what action should be taken to protect responders?

• A. Firefighters should prevent unauthorized personnel from entering
• B. The command post should be established in the warm zone
• C. Establish the following zones: restricted, limited, unlimited
• D. The zone should be selected as small as possible and only expanded if necessary

Answer: (A)

Access control in the hazard-control zone protects responders. This zone is where the hazard is at its highest, so restricting access to authorized personnel wearing appropriate PPE prevents exposure, stops contamination from spreading, and keeps operations from being disrupted by untrained individuals. The command post should be located in the cold zone, not the warm zone, and hazmat zoning is built around hot/warm/cold rather than categories like restricted, limited, unlimited. Additionally, zone size is driven by the extent of the hazard and operational needs, not determined by keeping it as small as possible.