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.

Date	Title	Standard Number
07/13/1994	Order of testing for permit spaces.	1910.146
07/11/1994	The Process Safety Management (PSM) of Highly Hazardous Chemicals (HHC) standard.	1910.119
07/11/1994	Respirator use of spray operations involving paints containing isocyanates.	1910.134
07/08/1994	Rollover protective structures for the Cary-Lift model.	1910 - Table of Contents
07/08/1994	Fall protection during steel erection activities.
07/07/1994	HHC's as it applies to wood digestion process containing multiple toxic and flammable liquid HHCs.	1910.119
07/07/1994	Control of Hazardous Energy (Lockout/Tagout) standard.	1910.147
07/07/1994	Management and supervisors' training required in paragraph (e)(4) of the standard.	1910.120
07/05/1994	Carbon Monoxide or High Temperature Alarm Requirement for Portable Breathing Air Compressors.	1910.134(i)(7)
07/01/1994	Appropriate quality standards for PPE.	1910.1030
06/30/1994	State approval of a State occupational safety and health program.
06/29/1994	HHC's as it applies to employer obligation to obtain and evaluate information regarding the contract employer's safety performance and programs	1910.119
06/29/1994	Key to open locked exits.	1910.36
06/28/1994	Central repository for violence in the workplace materials.
06/27/1994	Recording of a hearing injury.	1904 - Table of Contents
06/24/1994	MSDSs must be distributed to customer with shipment of chemical.	1910.1200
06/24/1994	Process Safety Management Standard (PSM) of Highly Hazardous Chemicals (HHCs) standard.	1910.119
06/22/1994	HHC's as it applies to pulp and paper industry processes that contain chlorine dioxide	1910.119
06/21/1994	Applicability of 1910.1030 to establish human cell lines.	1910.1030
06/21/1994	Out-of-doors emergency eyewash and shower installations in freezing and hot temperature areas.	1910.151

Letters of Interpretation

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