Standard Number > 1928 > 1928.21
- 1928.21 - Process Safety Management of Highly Hazardous Chemicals and process hazard analyses. [10/31/1996]
- 1928.21 - Small farming operations and exemption from OSHA enforcement activity under CPL 02-00-051. [07/16/2007]
- 1928.21 - Standards that apply to cotton gins. [08/06/2002]
- 1928.21(a) - 1910.178 does not apply to agricultural operations. [09/23/1999]

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