Standard Interpretations - Table of Contents|
| Standard Number:||1910.1000; 1910.1001; 1910.1017; 1910.1018; 1910.1025; 1910.1027; 1910.1028; 1910.1029; 1910.1043; 1910.1044; 1910.1045; 1910.1047; 1910.1048; 1910.1050; 1910.1051; 1910.1052|
|OSHA requirements are set by statute, standards and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. This letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information. To keep apprised of such developments, you can consult OSHA's website at http://www.osha.gov.|
"TWA is the employee's average airborne exposure in any 8-hour work shift of a 40-hour work week which shall not be exceeded."The 8-hour TWA PEL is the level of exposure established as the highest level of exposure an employee may be exposed to without incurring the risk of adverse health effects. This should not be confused with short term exposure limits (STELs) or peaks. Therefore, your interpretation #1 comes closest to OSHA's definition of an 8-hour TWA PEL. OSHA would be justified in issuing a citation when personal air sampling indicates employee exposure to be in excess of the PEL on the day sampled.
[Chuck Cake, Acting DirectorWe hope this information is helpful. If you have any further questions, please contact the [Office of Health Enforcement at (202) 693-2109].
California Department of Industrial Relations
Office of the Director
455 Golden Gate Avenue
San Francisco CA 94102
Telephone: (415) 703-5070]
|Standard Interpretations - Table of Contents|