Use of respirators for work in manholes.
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.
March 10, 1975
Mr. Raymond G. Ritthamel
Director-Safety & Security
GPU Service Corporation
Post Office Box 1018
Reading, Pennsylvania 19603
Dear Mr. Ritthamel:
This is in response to your letter of February 18, 1975, with reference to work in manholes.
The rules quoted in your letter; i.e., 1926.956(a)(3)(i), (ii), and (iii), do not require the presence of emergency respiratory equipment in the immediate vicinity when work is being performed on underground lines.