What Does Ceiling Exposure Level (CEV) Mean?
The ceiling exposure value (CEV) refers to the maximum concentration of an airborne substance - either biological or chemical - that should never be exceeded under any circumstance. It is the maximum concentration to which a worker may be exposed at any time. This means that a worker who is exposed to a concentration higher than the CEV may suffer health effects, regardless of the duration of exposure. This exposure limit is strictly observed for chemicals and biological agents that could cause irreversible health effects. It should never be exceeded.