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
Recording restricted work activity on the OSHA 200 Log. 1904 - Table of Contents
Conflict between requirements of 1910.252 and 1910.146 1910.252, 1910.146
Minnesota administers its own occupational Safety & Health Program. 1910.120
Use of the Racal "Breath-Easy 6" powered air purifying respirator with beards. 1910.134(g)(1)(i)
Definition of Potentially Gassy Atmosphere. 1926.800
Permissibility of a consent form with a waiver of liability. 1910.1030, 1910.1030(g)(2)(vii)(I)
Minimum length that an excavation must be before a protective system is required. 1926.652(a)
Flammable and Combustible Liquid standard. 1910.106
Location and maintenance of OSHA injury and illness records for employees working at off-site locations. 1904 - Table of Contents
Head protection standard. 1910.135
Positioning hooks on concrete formwork.
Work performed in conjunction with insulated enclosures. 1910.146
Class I lasers. 1926.54
Custom shoes in an industrial environment. 1910.136(b), 1926.96
Pump jack scaffold bracing. 1926 Subpart L
Reverse signal alarms for motor vehicles. 1926.601(b)(4)(i)
Noise exposure standard and impairment adjustments. 1910.95, 1910.95 App F
Coverage of Lifeguards. 1910.1030
Dimethylamine and Anhydrous Dimethlamine and the PSM standard. 1910.119
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