Which observation may indicate the presence of hazardous materials at a scene?

Which observation may indicate the presence of hazardous materials at a scene?

• A. The Presence Of Certain Storage Vessels
• B. The Number Of Responders On The Scene
• C. The Time Since Arrival Of First Units
• D. The Weather Conditions

Answer: (A)

Observing certain storage vessels at a scene is a strong cue that hazardous materials may be involved. Containers such as compressed gas cylinders, large drums, totes, or other pressurized or specialized vessels are commonly used to store chemicals, so their presence suggests a chemical hazard could be present. This should prompt you to look for labels, placards, and shipping papers and to start hazmat precautions, since these containers are typically associated with hazardous materials and may pose risks if damaged or leaking. The other observations—the number of responders, how long units have been on scene, or the current weather—don’t by themselves indicate the presence of hazardous materials; they affect response operations but not the identification of hazmat.

Observing certain storage vessels at a scene is a strong cue that hazardous materials may be involved. Containers such as compressed gas cylinders, large drums, totes, or other pressurized or specialized vessels are commonly used to store chemicals, so their presence suggests a chemical hazard could be present. This should prompt you to look for labels, placards, and shipping papers and to start hazmat precautions, since these containers are typically associated with hazardous materials and may pose risks if damaged or leaking. The other observations—the number of responders, how long units have been on scene, or the current weather—don’t by themselves indicate the presence of hazardous materials; they affect response operations but not the identification of hazmat.