By Related WAC

WISHA provides rule guidance to staff through two types of policies:

  1. WISHA Interim Operations and Interpretive Memoranda (WIIM)
  2. WISHA Regional Directives (WRD)

The WIIMs and WRDs do not:

  • Substitute for the rule or requirement referenced
  • Create additional obligations for employers

Policies related to Chapter 296-67, WAC.

WISHA policies in effect as of 3/25/2014. View all policies by Related WAC code.

Referenced WAC Policies

Process safety management of highly hazardous chemicals, Safety standards for
(Chapter 296-67, WAC)

Severe Violator Enforcement Program (WRD 2.68)
Chemical Facility Process Safety Management NEP (WRD 24.40)
Process Safety Management Inspections (WRD 24.50)


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