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.

NOTICE:

How to Request a Letter of Interpretation

Filters


Date Title Standard Number
Encon Tuff-Spec safety spectacle meets the intent of 1910.133. 1
Medical Surveillance requirements of the Benzene Standard. 1
Inquiry on monitoring device for cigarette smoke in buildings. 1
The Scott "formaldehyde" chin-style canister respirators are acceptable. 1
Response to a request for information concerning the OSHA standard for carbon monoxide. 1
Review of Electrical Utilities Procedures for Compliance with Subpart K of Part 1926. 1
Requirements for labels in a language other than English. 1
Hexavalent chromium in photocopier toners. 1
Information on the health hazard of ozone produced by common office copiers and on radon gas testing devices. 1
Lead standard: multiple physician review and medical removal. 3
Posting of the Occupational Noise Exposure Standard. 1
Hooks on overhaul ball assemblies shall be of a type that can be closed and locked. 1
The process for employee transfer from the aerial device to a fixed structure. 0
Standards applicable to Epon 826, 827, and Epon Curing Agent Z. 3
Rollover protective structures for material handling equipment. 1
Requirement for pump jack scaffolds. 1
Clarification of requirements for 40 hours of training.; Site specific training is required for employees who receive general training. 2
Hearing conservation programs and "ear blasts" on communication headsets 1
Questions and answers on AIDS. 0
Coverage of wood dust under the Hazard Communication Standard (HCS) 1