First responders trained to the Awareness level are able to recognize which of the following?

First responders trained to the Awareness level are primarily focused on recognizing and understanding the presence of hazardous materials in their environment. They are equipped to identify the need for additional resources by detecting signs of a hazardous situation, such as unusual odors, leaks, or spills.

This recognition is crucial, as it allows them to alert appropriate authorities and facilitate a more effective response. Awareness-level training emphasizes the importance of safety, situational awareness, and the ability to communicate potential hazards to responders with higher levels of training who can handle containment and disposal effectively.

The other options involve actions or knowledge that exceed the capabilities of first responders at the Awareness level. For instance, executing containment, identifying chemical structures, and determining disposal methods require specialized training and skills beyond basic awareness. Thus, the correct answer reflects the essential role awareness-level responders play in the overall emergency response framework.