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.

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Date Title Standard Number
Hepatitis B vaccination series requirements of bloodborne pathogens standard. 1910.1030
Definition of an "article" under the hazard communication standard. 1910.1200(b)(6)(iv)
Registration of sterilants, tuberculocidal disinfectants, and anti-microbial products. 1910.1030
Recordkeeping requirements as applied to sheltered workshops. 1904 - Table of Contents
Hierarchy of air contaminant controls; respirators for emergencies. 1910.134(a)(1), 1910.134(d), 1910.38(a), 1910.120(q)(1), 1926.65(q)(1)
The hotel/motel industry and the bloodborne pathogens standard. 1910.1030
Recapping of contaminated needles. 1910.1030(d)(2)(vii)(B)
Preservation of Criminal Evidence and Acceptability of Dry Cleaning under 29 CFR 1910.1030 1910.1030
Counting of soiled health care textiles by route sales representatives. 1910.1030(d)(4)(iv)
Support zone personnel at a CERCLA thermal destruction site. 1910.120
Bloodborne pathogens standard and the construction industry. 1910.1030
Training for plant maintenance personnel and HAZWOPER. 1910.120
Solutions of hydrogen chloride in water. 1910.119
Solutions of hydrogen chloride in water do not apply to Process Safety Management Standard. 1910.119
Reeves Sleeve stretcher.
Rigging equipment for material handling. 1926.251
When steam boilers fired by flammable liquids or natural gas are subject to the PSM standard. 1910.119
Protective devices for ladderway openings. 1910.21
Transportation of hazardous waste. 1910.120, 1910.120(q), 1910.1200, 1975.1
Fiberglass tanks for above and below ground storage of flammable and combustible liquids 1910.106