What PPE level is typically required for unknown chemical exposures?

• A. Level D with no protection
• B. Level A with full protection
• C. Level C with respirator protection; escalate to Level A or B if risk is unknown or high; follow local HazMat guidelines.
• D. Level B with pressure-demand atmosphere-supplying respirator

Answer: (C)

When you don’t know what a chemical can do, protect both your breathing and your skin while keeping the option to increase protection quickly if needed. Starting with Level C PPE, which combines a respirator with splash-protective clothing, gives solid protection against inhalation hazards and splashes without the heavy encumbrance of a fully encapsulated suit. It allows you to work and reassess as more information becomes available. If the hazard is unknown or judged high, you escalate to Level A or Level B based on the specific situation and local HazMat guidelines: Level A provides the most protection with a fully encapsulated suit and self-contained breathing apparatus, while Level B offers strong respiratory protection with a non-encapsulated suit. Level D would not protect against unknown chemical exposures.