Which CPC level is typically used when there is a risk of contact with hazardous vapors only?

The correct choice is Level C, which is designed for situations where the hazard is aerated and the potential contact is with hazardous vapors. This level of personal protective equipment (PPE) is used when there is a need to protect against inhalation exposures but when the concentration and type of substance has been identified and monitoring is in place.

Level C includes chemical splash goggles, a mask with a gas filter, and full-body clothing, which are ideal for preventing vapors from coming into contact with the skin or being inhaled. It allows responders to engage in operations where the air contaminant concentration can be controlled and where respiratory protection is adequate, making it appropriate for environments that do not require the highest level of skin or respiratory protection.

In contrast, Level A is a fully encapsulated suit for situations with unknown vapors, Level B is used where there is a high level of respiratory protection needed but the skin is either not a concern or is known to be safe, and Level D is for situations that do not pose a risk of chemical exposure and require the lowest level of protection. Thus, Level C strikes the correct balance for working with hazardous vapors.