An official website of the Washington state government
The .gov means it’s official.
A .gov website belongs to an official government organization in the United States.
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and
transmitted securely.
Working together for safer communities
The maximum eight hour time weighted average of an airborne contaminant(s) to which an employee may be exposed. At no time shall the exposed level exceed the ceiling level concentration or excursion value.