The two types of potential hazards found in each guide of the Emergency Response Guidebook.

• A. Health and Fire/Explosion
• B. Health and Environmental Hazard
• C. Fire/Explosion and Environmental Hazard
• D. Physical and Chemical Hazards

Answer: (A)

Each ERG guide highlights two primary hazards to focus a responder’s immediate assessment: the health hazard and the fire/explosion hazard. The health hazard describes the acute or chronic effects that exposure to the material could cause in people, guiding medical protection and exposure control. The fire/explosion hazard addresses how flammable or reactive the material is—its ignition risks, flash point, reactivity with other substances, and potential for causing a fire or explosion. Together, these two categories help responders quickly judge personal protection needs and what to do to prevent ignition or exposure. The other options don’t fit because environmental or physical/chemical hazard distinctions aren’t the two hazards emphasized in each guide; the ERG centers on health effects and fire/explosion risk.