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.

Filters


Date Title Standard Number
Rehabilitation of a sewer tunnel constructed in the years between 1926 and 1932 1926.800
The use of fork trucks in plants. 1910.178(m)(5)(iii)
The intervals between physical examinations for employees performing interior structural firefighting. 1910.134, 1910.156
Control of Hazardous Energy Sources (Group Lockout/Tagout). 1910.147(f)(3), 1910.333(b)(2)
Decontamination of equipment used on hazardous waste sites. 1910.120(k)
Application of 1910.120 to emergency Responders at a nuclear power plants 1910.120
Use of non-approved respirators and improper use of approved respirators 1910.134(d)(1)(ii)
Application of the Hazardous Waste Operations and Emergency Response to general industry. 1910.38, 1910.120
Employee emergency alarm systems. 1910.165, 1910.165(b)(2), 1910.165(b)(3), 1910.165(b)(4), 1910.165(c)(1), 1910.165(d)(3), 1910.164(d)(4), 1910.38, 1919.120(l), 1910.120(q), 1910.7
Hazards created by unguarded vertical food mixers. 1910.212
Cost of HIB and HIV vaccine for nursing home employees to be borne by the employer
Sampling for benzidine congener dyes 1910.1010
Decision in The Hardaway Co. v. Dole Case. 1910.132(a)
Chemical manipulation, production, multiple uses of chemicals in QC Labs 1910.1200, 1910.1450
Laboratory Standard's application in testing building products 1910.1200, 1910.1450
Barge loading equipment. 1918 - Table of Contents, 1918.13
Clarification of Standards 1926 Subpart P, 1926.651, 1926.652
Applicability of the OSHA Laboratory Standard to laboratories within the electric utility industry. 1910.1200, 1910.1450
Point of operation guarding for the AMPOMATOR CLS II Wire Terminal Machine 1910.212(a)
Use of loss control reports prepared by an insurance company for its policyholders, will create a detrimental relationship between the company and the policyholders 1903.3