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
Toenail particles do not qualify as regulated waste. 1910.1030
Dental workers exposed to disinfectants as part of decontamination. 1910.1030
HHC's as it applies to flammable liquid stored at a worksite. 1910.119
Retract-A-Matic 6 Lifeline as it applies to personal fall arrest system. 1910.66 App C
Wood dust sampling 1910.1000
NRTL accreditation of an existing approved lab and a lab with which it has merged. 1910.7
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
Machine guarding requirements as it applies to centrifuges. 1910.212
Labeling of products currently under FDA review. 1910.1030
Toilets are not required at construction jobsites if transportation is readily available to nearby facilities. 1926 - Table of Contents
Portable firefighting equipment. 1926.150
Cleaning of police uniforms as specified by bloodborne pathogens standard 1910.1030
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)
Electrical utility underground workplaces and the permit-required confined space standard.
Tabletop centrifuges designed for use in physician offices and laboratories. 1910.212
HHCs as it applies to how high must the percentage of a chemical be to require compliance. 1910.119
Propane as a fuel for ovens; Chlorine storage exceeding 1500 pounds. 1910.119
Respiratory protection as it relates to oil fields 1910.134
Interlock requirements for centrifuges. 1910.212
Evaluation and use of radiofrequency protective clothing 1910.132