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

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Date Title Standard Number
Bloodborne Pathogen standard's applicability to first aid providers for employees who accidentally rupture a sewage line. 1910.1030
The use of head protection at construction sites. 1926.100
Bloodborne pathogens as it relates to home health care agencies. 1910.1030
Farming Appropriations Rider 1928.1
Operating backhoes and mobile equipment. 1926.550(a)(15)
Bloodborne pathogen standard's application to persons who perform first aid. 1910.1030
OSHA's Hazardous Waste Operations and Emergency Response final rule. 1910.120
Refresher training and HAZWOPER. 1910.120
Coverage of child care workers under scope of occupational exposure to bloodborne pathogens. 1910.1030
The use of ladders and fall protection by steel erectors. 1926.1051(a)
OSHA regulates vermin control at permanent places of employment and at temporary labor camps. 1910.141(a)(5), 1910.142(j)
Marking of vehicles transporting explosives. 1926.902(h)
Cellulose nitrate and the PSM Standard. 1910.119
Construction interpretation issues. 1946.451, 1926.50, 1926.105
Eyewash and shower equipment in construction. 1910.151
Recording occupational exposure to Hepatitis B and HIV. 1904 - Table of Contents
CTD cases involving positive EMG results, etc. 1904 - Table of Contents
Process Modification - Thermoset Resin Technology Replacement for Lead in Drop Hammer Punches 1910.1025
Maintenance operations of a construction nature. 1910.1030
Landscaping employees working in extreme temperatures 1910.132, 1910.141