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
Determining if injuries or illnesses are work-related as a result of an act of violence 1904 - Table of Contents, 1904.5
Guards for Belt and Shaft Drives on Blow Motors 1910.212, 1910.219, 1910.219(e)(1)(i)
Exclusion of arsenic-treated wood from OSHA's Inorganic Arsenic standard 1910.1018, 1910.1018(a), 1910.1200, 1926.1118, 1926.1126
OSHA policy for laboratory analysis of wall deposits on the inside of an air sample cassette 1910.1020(c)(5)(i)
Application of OSHA standards when an employer is using the "Focused Electrode Leak Locator" (FELL) 1910.302, 1910.303, 1910.307(c)(1), 1910.307(c)(2), 1910.307(c)(3), 1910.399, 1910.146
The use of noise-canceling headphones in place of intra-aural earplugs 1910.95, 1910.95 App B, 1926.52, 1926.101
Frequency of refresher training for first aid and CPR 1910.146(k)(2)(iii), 1910.151, 1910.151(b), 1910.266(i)(7), 1910.269(b)(1), 1910.410(a)(3), 1915.87, 1915.87(c)(5), 1926.50, 1926.50(c), 1926.951, 1926.968
Is a single-handed scalpel blade removal device an engineering control under the Bloodborne Pathogens standard? 1910.1030, 1910.1030(b), 1910.1030(c)(1)(ii)(B), 1910.1030(d)(2)(i), 1910.1030(d)(2)(vii), 1910.1030(d)(2)(vii)(A), 1910.1030(d)(2)(vii)(B)
Applicability of the HCS to Lithium Ion Batteries 1910.1200, 1910.1200(b)(1), 1910.1200(b)(5)(v), 1910.1200(b)(6)(v), 1910.1200(b)(6)(ix), 1910.1200(c), 1910.1200(d)(1)
Transmitting bulk shipment labels by technological or other means 1910.1200, 1910.1200(f), 1910.1200(f)(1), 1910.1200(f)(6), 1910.1200(f)(7)
The use of ANSI S3.1-1999 (R2018) MPANLs for audiometric testing 1910.95, 1910.95 App D
Impact on construction businesses by OSHA's NEP-Outdoor and Indoor Heat-Related Hazards
Updating OSHA's Lead Standards' requirements for medical removal of employees based on hazardous blood lead levels 1910.1025, 1915.1025, 1926.62
The impact of the COVID-19 pandemic on the retail industry 1904.39(b)(6), 1904.4(a), 1910.141
Chemicals associated with formaldehyde gas 1910.1048, 1910.1048(m)(1)(iv)
Exit Signs 1910.37(b)(7), 1910.35, 1910.34, 1910.36, 1910.37, 1910.6 - Index
Cathodic Protection and the Utilization of Metallic Bonding to Control Hazardous Energy 1910.147 - Index
COVID-19 Focused Inspection Initiative in Healthcare 1904, 1910.132, 1910.134, 1910.502, 1910.1020
Employer Responsibilities and Contractor Responsibilities under the PSM Standard 1910.119(h)(2)(vi), 1910.119(h)(3)
Handling and disposal of respirable silica dust, contaminated equipment, and filters from vacuums and PPE 1910.1053, 1910.1053(d)(1), 1910.1053(h)(2), 1926.1153, 1926.1153(c)(1), 1926.1153(d)(2), 1926.1153(f)(2)