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
Recording of hearing loss on the OSHA 200 Log. 1910.95, 1904 - Table of Contents
Hazwoper minimum training for an On Scene Incident Commander. 1910.120
Mechanical power press requirements and platen presses. 1910.217
OSHA 200 Form Location 1904.2
OSHA 200 Log for work relationship and illness. 1904 - Table of Contents
Exits must not be locked or obstructed. 1910.36(d)
Hazwoper EPA and OSHA jurisdictional issues. 1910.120
Fixed ladders in outdoor advertising. 1905 - Table of Contents
Baseline to use when measuring occupational related hearing loss for OSHA recordkeeping purposes. 1904 - Table of Contents
Audiometric test results recording on the OSHA 200 log. 1904 - Table of Contents
OSHA 200 log and hearing loss. 1904 - Table of Contents
Changing tines/capacity of powered industrial trucks. 1910.178
OSHA 200 Log and hearing loss. 1904 - Table of Contents
Washington's Response to Federal Program Change (CPL 2-2.51) 1910.120
Employees who become ill or injured on the job. 1910.151
Underground storage tanks and 1910.120. 1910.120
Sharp knives and utensils in the workplace 1910.132
Geographic definitions, multi-functional setting; refresher training. 1910.120
Use of crane or derrick suspended personnel platforms accessing a worksite. 1926.32
Use of automatic equipment for the machining of connecting rods, crankshafts, cylinder heads and engine blocks. 1910.147