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
The "gas caddy" and OSHA's Flammable and Combustible Liquids Standard. 1910.106
Tuberculosis: respiratory protection and complaint inspection. 1910.134
Conveyor Crossover Stile. 1905.10, 1905.11, 1905.12, 1905.13, 1905.14, 1905.15, 1905.16, 1910.23, 1910.27
Training requirements under the HAZWOPER standard. 1910.120
Hazards of Smoke Generated from Surgical Procedures 1910.1030
OSHA Injury and Illness Recordkeeping Interpretations. 1904 - Table of Contents
OSHA Injury and Illness Recordkeeping Interpretations. 1904 - Table of Contents
Deletion of non-recordable and changed case entries from the OSHA 200 log. 1904 - Table of Contents
Definition and determination of work related injuries and illnesses. 1904 - Table of Contents
OSHA injury and illness recordkeeping interpretations. 1904 - Table of Contents
The Use of the Bullard "Free Air" Pump. 1910.134
Standards applicable to a barge-mounted stiffleg derrick engaged in the repair and maintenance of a dam site. 1926.550, 1926.605
Job requiring respiratory protection. 1910.134, 1910.1025
OSHA's Interim Final Rule of Lead in Construction. 1926.62
The potential for the transmission of HIV from contact with urine specimens. 1910.1030
Doctors required to wear gloves while fitting patients with contact lenses. 1910.1030
Flash point of cleaning solvents for spray finishing equipment 1910.107(g)(5)
Confined spaces: use of rescue-type SCBAs; maintenance vs. construction 1910.146(c), 1910.146(d), 1910.12(b), 1926.21(b)(6)
Definition of a "floor," "building official," and "plates of approved design." 1910.22, 1910.22(d)
Portable ladders. 1910.21, 1910.21(e)(2), 1910.23(c)(14), 1910.32(b)(5), 1926.500, 1926.1050, 1926.1053(b), 1926.1053(b)(5)(i), 1926 Subpart L