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
12/30/1993	Applicability of the Process Safety Management manufacturing processes involving workplace explosives.	1910.109, 1910.119
12/30/1993	Processes involving workplace explosive.	1910.119
12/28/1993	First Aid in the workplace.	1910.151, 1910.266(c)(1)(vii)
12/27/1993	Fall protection and pipe racks.	1926.502(d)
12/22/1993	The Occupational Safety and Health Administration's (OSHA) Hazard Communication Standard as they apply to veterinary drugs.	1910.1200
12/14/1993	HHCs as it applies to strategic petroleum reserve storage sites.	1910.119
12/10/1993	HHCs as it applies to end use applications of acrolein.	1910.119
12/09/1993	Tunnel boring machine equipment.	1910.7(a), 1926.449, 1926.403(a), 1926.800(s)
12/09/1993	Proper equipment for testing ground-fault circuit interrupters (GFCIs).	1926.404(b)(1)(ii)
12/03/1993	General industry standards to construction activities.	1926.20(d)(2)
12/01/1993	Keller ladder proper set up.	1926.32, 1926.1060(a)(1)(iii)
11/29/1993	Hoists that have two upper "hoist limit switches".	1910.179
11/29/1993	What is considered medical treatment.	1904 - Table of Contents
11/24/1993	Extracted teeth potentially infectious materials.	1910.1030
11/23/1993	The meaning of "direct recirculating ovens".	1910.263
11/22/1993	Plumbed emergency eyewash requirements as they apply to faucet-mount emergency.	1910.151
11/18/1993	Highly Hazardous Chemicals, methanol stored in an atmospheric tank.	1910.119
11/17/1993	Steel-toed and steel-shanked tennis shoes for use at a construction site.	1926.96
11/15/1993	Permit-Required Confined Spaces: metal container curing ovens.	1910.146(c)(7), 1910.147, 1910.146(b)
11/15/1993	Exit route requirements as it relates to the widths of doorways into electrical equipment enclosures.	1910.36(g)(2)