A vapor-tight suit is characteristic of which hazmat PPE level?

• A. Level A
• B. Level B
• C. Level C
• D. Level D

Answer: (A)

The essential idea is that a vapor-tight, fully encapsulating suit represents the highest level of hazmat protection. This level is chosen when the atmosphere may contain unknown or highly toxic vapors, gases, or their mixtures, requiring complete seal around the body and respiratory protection from a supplied-air source. The suit works with a self-contained breathing apparatus, often providing positive pressure inside the suit to prevent any contaminated air from leaking in. Because of the level of protection, it’s used in immediately dangerous to life and health situations and requires specialized training for proper donning, doffing, and decontamination. Other levels offer less protection—protective clothing with splash protection, or air-purifying respirators with non-encapsulating gear, or standard work attire—so they aren’t appropriate for unknown or highly toxic vapors.