Air monitoring should include checking for which hazards?

• A. Only temperature
• B. Only humidity
• C. TIH hazards, oxygen deficiency, and flammable vapors
• D. Only dust

Answer: (C)

Air monitoring focuses on identifying atmospheres that create immediate life-safety risks or ignition hazards. The three key hazards to detect are toxic atmospheres (TIH hazards), oxygen levels that are deficient (which can cause asphyxiation), and flammable vapors that could ignite or explode. Detecting TIH substances tells responders whether a victim could be poisoned or overwhelmed by inhalation. Measuring oxygen ensures the air isn’t thin enough to impair respiration or consciousness. Monitoring for flammable vapors determines whether an environment is explosive or has a high ignition risk. Temperature and humidity aren’t the primary life-safety hazards in this context, and while they can influence vapor behavior or comfort, they don’t by themselves define whether a space is hazardous for entry. Dust may be a concern in some scenarios, but it isn’t the core set of atmospheric hazards that air monitoring aims to identify for hazmat response. That’s why the option covering TIH hazards, oxygen deficiency, and flammable vapors is the best choice.