Standard Interpretations

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.

1910.109 - Apex 1000 emulsion is regulated as an ammonium nitrate mixture which is not a blasting agent. - 07/01/1988
1910.109 - Applicability of the Process Safety Management manufacturing processes involving workplace explosives. - 12/30/1993
1910.109 - Clarification of 29 CFR 1910.109 as it applies to two kinds of explosive devices used in steel mills. - 07/14/1983
1910.109 - Clarifications of the OSHA standards 1910.109 and 1910.119. - 06/16/1994
1910.109 - Explosives and Blasting Agents. - 08/18/1994
1910.109 - Fireworks manufacturing and OSHA jurisdiction. - 12/05/1991
1910.109 - Guidance in relation to rules and regulations governing warehousing and transportation of powder-actuated tool cartridges. - 01/26/1977
1910.109 - Numerous questions related to OSHA's notice to terminate the rulemaking to amend the explosives standard. - 04/24/2012
1910.109 - OSHA PSM and Explosives Standards as They Relate to the DOT Classification "Not in the Explosive Class" - 03/17/2021
1910.109 - OSHA's classification of assembled auto air bag inflation modules. - 09/12/1980
1910.109 - Packing materials which were used for packaging explosives must be burned. - 05/05/1995
1910.109 - Process Safety Management Standard. - 12/02/1994
1910.109 - Sodium Azide as Used in the Manufacturing Process of Automobile Air Bags. - 06/30/1997
1910.109 - Use of NFPA 1124-1988 when inspecting Fireworks Manufacturing Facilities. - 06/05/1990
1910.109(a) - OSHA PSM and Explosives Standards as They Relate to the DOT Classification "Not in the Explosive Class" - 03/17/2021
1910.109(e)(4) - Blasters Circuit Testers. - 09/17/1990
1910.109(e)(4)(vii) - Carbon zinc batteries in blasting galvanometers. - 10/12/1977
1910.109(h) - Peroxides and chlorates in blasting agents, slurries and emulsions - 01/31/1991
1910.109(i) - Guidance on the Ammonium Nitrate Storage Requirements in 29 CFR 1910.109(i) - 12/03/2014
1910.109(k) - OSHA PSM and Explosives Standards as They Relate to the DOT Classification "Not in the Explosive Class" - 03/17/2021
1910.109(k)(2) - Applicability of PSM standard to explosive and pyrotechnic manufacturing. - 02/04/1998
1910.109(k)(2) - OSHA PSM and Explosives Standards as They Relate to the DOT Classification "Not in the Explosive Class" - 03/17/2021
1910.109(k)(3) - Applicability of PSM standard to explosive and pyrotechnic manufacturing. - 02/04/1998
1910.109(k)(3) - OSHA PSM and Explosives Standards as They Relate to the DOT Classification "Not in the Explosive Class" - 03/17/2021

OSH Act - Section 5(a)(1)