During a chemical incident, which protective action moves people outside the affected area?

• A. Shelter-in-place
• B. Lockdown
• C. Quarantine
• D. Evacuation

Answer: (D)

Evacuation is the protective action that moves people away from the hazard and outside the affected area. The aim in a chemical incident is to remove individuals from exposure to toxic vapors or contamination, reducing the risk of inhalation or contact injuries by getting them to a safe location beyond the danger zone. Shelter-in-place keeps people inside to avoid outdoor exposure when the plume is near but doesn’t relocate them from the hazard area. Lockdown focuses on securing a building during security threats, not addressing environmental contamination. Quarantine restricts movement of potentially exposed individuals, not the broader area outside the chemical hazard. So evacuating people to safety outside the affected zone best meets the goal of moving them away from the chemical threat.