Letters of Interpretation | Occupational Safety and Health Administration

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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How to Request a Letter of Interpretation

Date	Title	Standard Number
09/12/1990	Hazard Communication Standard, pertinent to distributors of hazardous chemicals.	1910.1200
09/10/1990	Accommodations for CSHOs not meeting the physical examination criteria and Backlog for reviewing CSHO medical records
09/07/1990	Feasibility of Guarding ESCO Swaging Presses.	1910.212
09/07/1990	Incorporation of the Chemical Hygiene Plan (CHP) into current Hazard Communication and/or other related manuals	1910.1450
09/07/1990	Standards regarding overhead protection (ROPS, canopies, etc.) for operators of log skidders.	1910.266
09/07/1990	Applicability of the new Electrical Safety final rule, Subpart S, to the construction industry	1910.333, 1910.332, 1910.334, 1910.335
09/06/1990	High-Efficiency Particulate Air (HEPA) Filters for Vacuum Cleaning.	1910.1001, 1926.1101
09/06/1990	Clarification for Employee Alarm Systems.	1910.165
09/06/1990	Coke Oven Emissions	1910.1029
09/05/1990	Training not required if employees not likely to be exposed to or participate in emergency response activities.	1910.120
09/05/1990	Interpretation of Standards.	1910.252
09/05/1990	WordPerfect Style Sheet for the Directive System
09/04/1990	Smoking and occupational exposure to asbestos	1910.1001(i)(4), 1926.1101(j)(4)
08/31/1990	Construction multi-employer worksites.	1910.12(c), 1926 - Table of Contents, 1926.13, 1926.16
08/31/1990	First Aid supplies required by businesses	1910.151(b)
08/27/1990	Negative Pressure Glovebag Usage in Asbestos Removal	1910.1001
08/24/1990	Product endorsement policy and telephone headsets.	1910.95, 1910.7
08/23/1990	Portam Process asbestos abatement equipment use for asbestos removal.	1926.1101, 1926.1101(e), 1926.1101(g)(5)(i)
08/22/1990	OSHA's Hazard Communication Standard.	1910.1200
08/22/1990	Safety Jurisdiction Over Refitted Propane Tanks Used to Store Malodorant Agents at Pipeline Facilities.