What PPE level is required for CBRN exposures, and why?

• A. Level A or higher; to protect against inhalation and dermal exposure
• B. Level C or higher; to protect against inhalation and dermal exposure and to enable rapid decontamination
• C. No PPE is required
• D. Level D

Answer: (B)

In a CBRN situation, you must protect both the respiratory tract and the skin from potential hazards, and you want to be able to decontaminate quickly if exposure occurs. Level B provides solid protection: a chemical splash-protective ensemble combined with a fully functioning respiratory hood or SCBA, which guards against inhalation and skin contact without sealing you into a gas-tight suit. This balance allows effective decontamination and rapid equipment removal if needed.

Level A is more protective in theory because it’s gas-tight and fully encapsulated, but that level of encapsulation makes rapid decontamination and field work much more cumbersome. Level C offers good respiratory protection with an air-purifying respirator but less dermal protection against splash exposure, which can be risky with liquids or contaminants. Level D provides minimal protection, essentially ordinary clothing, which is inadequate for CBRN hazards. So, Level B or higher best fits the need to guard against inhalation and dermal exposure while still permitting efficient decontamination.