Entry into a confined space when the lower flammable limit is greater than ten percent.
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 4, 1996
Mr. Macon Jones
Blasting Cleaning Products LTD.
2180 Speers Road
Oakville, Ontario
Canada L6L2X8
Dear Mr. Jones:
This is response to your request of April 10, requesting clarification of the 29 CFR 1910.146 standard. Please accept our apology for the delay. Responses to your questions follow: