How should hazardous zones be documented on site maps?

• A. Only temperature zones.
• B. Clearly label hot/warm/cold zones, standoff distances, access routes, and decon points on updated maps.
• C. Only decon points.
• D. Customer signatures.

Answer: (B)

In hazardous zones, the map must clearly communicate the current boundaries and the safety controls in place so everyone can move, operate, and decontaminate safely. Labeling hot, warm, and cold zones shows how close personnel and equipment can approach the hazard and what protective measures are required. Including standoff distances translates those boundaries into actionable spacing that keeps people out of danger. Marking access routes controls who can enter and how they should move through the area, reducing confusion and ensuring escorts or clearances are followed. Decon points on the map identify where cleaning and contamination control happen, which is crucial before gear or personnel leave the hot zone or shift to a lower-risk area. Keeping these elements up to date on maps ensures the information reflects current conditions, which is essential when hazards shift or the situation changes.

Other options fall short because they don’t provide a complete, actionable picture: focusing only on decon points misses the boundary and movement controls; focusing only on temperature zones ignores movement and decontamination logistics; and customer signatures have no bearing on on-site safety documentation.