What are three clues that may indicate the presence of Hazmat?

The presence of hazardous materials can often be inferred from specific indicators in the environment. In this case, the correct choice focuses on three relevant clues: occupancy types, transportation placards, and monitoring devices.

Occupancy types refer to the nature of the facilities or buildings in the area. Certain types of occupancy, such as chemical storage warehouses or manufacturing plants, are more likely to have hazardous materials present than residential areas. Understanding these occupancy types helps first responders assess the potential for hazardous materials.

Transportation placards are vital in identifying hazards associated with materials during transport. These placards are standardized signs that indicate the type of hazardous materials being carried in vehicles, and they assist emergency responders in quickly recognizing the risks involved and determining the appropriate response measures.

Monitoring devices are tools often used to detect hazardous materials in the environment, such as gas detectors or radiation meters. These devices can provide real-time information about the presence and concentration of hazardous substances, enhancing situational awareness for responders on the scene.

The other choices incorporate elements that are less relevant or actionable in identifying the presence of hazardous materials.