In a decon facility, what is the purpose of the red line?

• A. To mark exit route
• B. To designate admin offices
• C. To indicate a no-entry zone
• D. To delineate boundary between contaminated (hot) and clean (cold) areas

Answer: (D)

The red line is a visual boundary that separates the clean (cold) area from the contaminated (hot) area in a decon facility. It serves as a clear cue to prevent cross-contamination by signaling where different PPE requirements apply and where decontamination steps must be performed before moving between zones. It’s about controlling the flow of people and materials and enforcing proper procedures, not simply marking an exit, an admin space, or a no-entry zone. As you approach or cross that line, you follow the established decon steps (donning or doffing PPE, etc.) to maintain safety and track containment.