Typical ignition sources found at the scene of a hazardous material incident would include all of the following except:

• A. Chemical light sticks
• B. Pass devices
• C. Radios
• D. Lighting equipment

Answer: (A)

Chemical light sticks do not serve as ignition sources in hazardous material incidents due to their design and operation. They generate light through a chemical reaction that does not involve combustion or produce sparks, making them safe to use in environments where flammable or hazardous materials are present. This makes them a non-ignition source, unlike other options that can potentially generate heat, sparks, or flames.

In contrast, passive devices, radios, and lighting equipment have characteristics that can pose a risk of ignition. Passive devices might involve electrical components that, under certain conditions, can produce sparks. Radios typically operate on batteries and can emit electromagnetic waves, which, while generally safe, can be a concern in the presence of flammable substances. Lighting equipment, particularly if it uses traditional bulbs or fixtures, can get hot and potentially ignite nearby combustibles.

Thus, understanding the nature of each item is crucial in identifying potential ignition sources in hazardous situations, confirming that chemical light sticks are indeed the exception in this scenario.