What boundary does the PPE donning point correspond to?

• A. Starting line of the survey
• B. Boundary of contamination
• C. Center of the contaminated area
• D. Outer perimeter of safe area

Answer: (B)

PPE donning points sit at the edge where contamination begins—the boundary between clean and potentially contaminated areas. Placing responders’ protective equipment there ensures a barrier is in place before entering any contaminated space, minimizing the chance that contaminants are carried into the safe area and helping control spread during operations.

Starting line of the survey isn’t linked to how contamination spreads or containment boundaries, so it doesn’t define where PPE should be donned. The center of the contaminated area is inside the hazard zone, not a boundary you use to equip yourself. The outer perimeter of a safe area is a general protection limit, but the specific point where you don PPE is the edge where contamination starts, i.e., the boundary of contamination.