Which of the following are used to designate contaminated areas?

• A. Step-off pads
• B. Yellow rope
• C. Magenta rope
• D. All of the above

Answer: (D)

Contaminated areas are marked and controlled with a combination of practical barriers and visual cues to prevent the spread of contamination. A step-off pad at the boundary helps remove or reduce contaminants from footwear as workers move between zones, acting as a decontamination checkpoint. Visual barriers like yellow rope and magenta rope provide clear, immediate boundaries that alert personnel and restrict access to the contaminated zone. Different colors can indicate different levels of restriction or types of boundaries, but the common goal is the same: to keep contamination from spreading and to protect workers. Because each of these elements contributes to proper designation and control of a contaminated area, all of them are used.