What should be established around the affected area?

• A. Decontaminate on site
• B. Notify media
• C. Create a barrier or perimeter around the affected area
• D. Provide first aid

Answer: (C)

Securing the scene with a barrier or perimeter is about getting control of the area to protect everyone and prevent the hazard from spreading. By creating a defined, restricted zone, you keep untrained people out, reduce exposure risk for responders, and preserve the integrity of the scene for investigation and proper handling. A clear perimeter also makes it easier to manage operations inside—like assessment, containment, and any necessary decontamination—without interference from bystanders.

Decontaminating on site is important, but it should happen after the area is secured. Notifying the media is not appropriate at the scene, as it can compromise safety and security. Providing first aid is essential, but it’s safest to do so once the area has been secured and access is controlled.