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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Date	Title	Standard Number
05/10/1993	Clarification of paragraphs (c)(5) and (c)(7) of the Permit-Required Confined Spaces standard.	1910.146
05/07/1993	MSDS requirements.	1910.1200
05/06/1993	Spray painting operations and the process safety management standard.	1910.119
05/03/1993	Fumigants used to control insects in food plants.	1910.119
04/30/1993	Toenail particles do not qualify as regulated waste.	1910.1030
04/30/1993	Dental workers exposed to disinfectants as part of decontamination.	1910.1030
04/28/1993	HHC's as it applies to flammable liquid stored at a worksite.	1910.119
04/27/1993	Retract-A-Matic 6 Lifeline as it applies to personal fall arrest system.	1910.66 App C
04/22/1993	Wood dust sampling	1910.1000
04/21/1993	NRTL accreditation of an existing approved lab and a lab with which it has merged.	1910.7
04/20/1993	Machine guarding requirements as it applies to centrifuges.	1910.212
04/20/1993	Clarification on first aid requirements for hazardous waste sites.	1910.120, 1910.120(e)(3)(ii), 1910.120(l)(2)(viii), 1910.151, 1910.151(b), 1910.1030
04/19/1993	Portable firefighting equipment.	1926.150
04/19/1993	Toilets are not required at construction jobsites if transportation is readily available to nearby facilities.	1926 - Table of Contents
04/19/1993	Labeling of products currently under FDA review.	1910.1030
04/19/1993	Cleaning of police uniforms as specified by bloodborne pathogens standard	1910.1030
04/16/1993	Training requirements for emergency and post-emergency response to marine-based oil spills.	1910.120(a)(3), 1910.120(q)(6)(iii), 1910.120(q)(6)
04/15/1993	Electrical utility underground workplaces and the permit-required confined space standard.
04/15/1993	Tabletop centrifuges designed for use in physician offices and laboratories.	1910.212
04/14/1993	Interlock requirements for centrifuges.	1910.212