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.

Filters


Date Title Standard Number
Occupational injury and illness data from worker's compensation carriers. 1904 - Table of Contents
Debt collection charges for January 1993 through December 1993.
Flammable liquid processes and the Process Safety Management standard. 1910.119
Employee participation requirements of the Process safety management standard. 1910.119
Steam boilers fired by flammable liquids or natural gas and the PSM standard. 1910.119
Proper recording of hearing loss on the OSHA Log 200. 1904.2(a)
Evaluation of a "generic" Material Safety Data Sheet (MSDS) for copper/copper alloys. 1910.1200
Contract employees and recordkeeping requirements. 1904 - Table of Contents
Clarification of training certification. 1910.120
OSHA's Hazard Communication Standard. 1910.1200
The hazardous waste operations and emergency response regulation. 1910.38, 1910.120
OSHA's Hazard Communication Standard. 1910.1200
Requirements for 'area classification drawings' for petrochemical plants. 1910.307
Guidance on whether "patch test kits" are exempt from the labeling requirements of HCS. 1910.1200
Lockout/tagout as applies to contractor employers with employees at electric power generation, transmission and distribution work sites. 1910.147
EPA CERCLA regulations and site monitoring requirements of 1910.120. 1910.120
Construction activities and operations and the bloodborne pathogens standard. 1910.1030
Requirements of hazard communication standard for listing chemicals. 1910.1200(e)(1)(i)
Updated material safety data sheets. 1910.1200
OSHA's Occupational Exposure to Bloodborne Pathogens Standard. 1910.1030