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
Multi-piece Rim Wheel. 1910.177
Electrical safety related work practices applicable to employees operating or working on or nearby, motor control centers in the workplace. 1910.303, 1910.304
Apparent inconsistency between the scaffolding requirements in the general industry standard and the construction standard. 1910.28
Whether or not guards are required for fan blades on an electrical transformer. 1910.212
Approval of temporary power for a construction site. 1926.403(a), 1926.449
Storage of flammable and combustible liquids in a storage room within a warehouse facility. 1910.106
"Approved" and "Acceptable" equipment has been determined to be safe by a qualified electrical testing laboratory. 1926.403, 1926.449
Guarding of Unused portion of metal cutting bandsaws. 1910.212
Electrical safety related work practices standard. 1910.147
Sampling of Resilient Floor Covering. 1910.1001
Laws and regulations on fire protection in the workplace. 1910 Subpart L
Welding and Noise in confined space 1926.52, 1926.21, 1926.353
Tie-in guides standard. 1910.66
Grain Handling Facilities - Inspection Guidance and Standard. 1910.272
OSHA's jurisdiction over volunteer fire fighters. 1910.120
Medical surveillance of HAZWOPER and employer responsibility to employees. 1910.120
Training and HAZWOPER. 1910.120, 1910.120(q)(1), 1910.120(q)(6)(ii), 1910.120(q)(6)(iii), 1910.38
Review of product literature.
Use of general protective equipment and tools by employees when working near exposed energized conductors or circuit parts in the workplace 1910.137, 1910.335, 1910.399
Enforcement of Bloodborne Pathogen Standard 1910.1030