Crystalline silica considered a carcinogen under the HCS.
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 https://www.osha.gov.
September 20, 1988
Mr. Theodore L. Garrett
Covington and Burling
Post Office Box 7566
Washington, D.C. 20044
Dear Mr. Garrett:
This is in further response to your letter of May 23 which petitioned the Occupational Safety and Health Administration (OSHA) to clarify or amend the Hazard Communication Standard (HCS) with regard to its applicability to crystalline silica.