In the U.S. Military Marking system, which of the following is NOT one of the three special hazards?

• A. Apply no water
• B. Chemical hazard
• C. Wear protective mask or Breathing apparatus
• D. Evacuate area immediately

Answer: (D)

Special hazard markings in the U.S. Military Marking system warn responders about how to approach or treat the hazard based on the agent’s properties. The three special hazards you look for are: “Apply no water,” which tells you that water could react with or spread the agent; “Chemical hazard,” which signals the presence of a chemical agent; and “Wear protective mask or Breathing apparatus,” indicating that respiratory protection is required. Evacuate area immediately, while important as a safety directive, is not a specific hazard indicator in this marking system. It’s a general action suggestion rather than one of the defined special hazards.