How many levels of CPC are defined by OSHA and the NFPA?

The correct answer is four levels of Chemical Personal Protective Clothing (CPC) as defined by OSHA and the National Fire Protection Association (NFPA). Each level corresponds to a specific degree of protection against chemical hazards, taking into account the type of materials being handled and the level of risk associated with potential exposure.

Level A provides the highest level of protection, ensuring the user is completely shielded from hazardous substances through the use of fully encapsulated suits and self-contained breathing apparatus. Level B also offers substantial protection but is designed for situations where the concentration of hazardous materials is known and is dealt with more safely. Level C is suitable for when the hazardous materials are known and can be managed with air-purifying respiratory protection. Finally, Level D is the least protective, typically used for nuisance contamination where there’s no significant risk of exposure.

Understanding these levels is crucial for safety personnel in determining the appropriate equipment to use during hazardous material incidents, ensuring they effectively protect themselves from exposure while performing their duties.