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
Recapping of contaminated needles. 1910.1030(d)(2)(vii)(B)
Counting of soiled health care textiles by route sales representatives. 1910.1030(d)(4)(iv)
Solutions of hydrogen chloride in water. 1910.119
Solutions of hydrogen chloride in water do not apply to Process Safety Management Standard. 1910.119
Rigging equipment for material handling. 1926.251
Reeves Sleeve stretcher.
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
Review of Rope Grab Knot. 1910.66 App C
Debt collection charges for January 1993 through December 1993.
Occupational injury and illness data from worker's compensation carriers. 1904 - Table of Contents
Employee participation requirements of the Process safety management standard. 1910.119
Steam boilers fired by flammable liquids or natural gas and the PSM standard. 1910.119
Flammable liquid processes and the Process Safety Management standard. 1910.119
Proper recording of hearing loss on the OSHA Log 200. 1904.2(a)
Evaluation of a "generic" Material Safety Data Sheet (MSDS) for copper/copper alloys. 1910.1200
Contract employees and recordkeeping requirements. 1904 - Table of Contents
The hazardous waste operations and emergency response regulation. 1910.38, 1910.120