Letters of Interpretation

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. Each 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.

These letters of interpretation and the standards they address may not apply to OSHA State Plans. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or additional requirements. Please see OSHA-approved State Plans for more information.

NOTICE:

How to Request a Letter of Interpretation

Filters


Date Title Standard Number
NIOSH approved respirator during the period of an employee's escape from a chemical release of phosgene. 1910.134(d)(1)(ii)
Sodium Azide as Used in the Manufacturing Process of Automobile Air Bags. 1910.109, 1910.119
OSHA's Hazardous Waste Operations and Emergency Response Standard. 1910.120
OSHA's Methylene Chloride Standard 1910.1052
OSHA's position on U.S. Environmental Protection Agency-approved disinfectants. 1910.1030
Hydrogen fuel that is contained in fuel storage cylinders. 1910.103
Requirements for negative pressure rooms.
OSHA's Fixed Ladders and Safety Cages standard. 1910.27
Control of hazardous energy (lockout/tagout) standard. 1910.147
Clarification o-f the electric power generation, transmission, and distribution standard. 1910.269
Provisions of the Hazard Communication Standard. 1910.1200
SCBA cylinder interchangeability. 1910.134(d)(1)(ii), 1910.156(f)(1)(iv), 1910.120(q)(3)(x)
SIC's excluded from OSHA occupational injury and illness recordkeeping. 1904 - Table of Contents
Removal of foreign bodies embedded in the eye is recordable. 1904 - Table of Contents
Internet use for posting Material Safety Data Sheets (MSDSs). 1910.1020
Association between toluene and Pierre Robin Syndrome. 1915.1000
Scaffolds used in the Construction Industry. 1926 - Table of Contents, 1926.451
Appropriateness of computer-based interactive training programs to satisfy required OSHA training. 1910.1030
OSHA regulation on "piped" potable water supply. 1910.141, 1928.110
OSHA's Methylene Chloride Standard 1910.1052