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 4/10/2013. View all policies by Related WAC code.

Referenced WAC	Policies
Process safety management of highly hazardous chemicals, Safety standards for (Chapter 296-67, WAC)	PSM Inspection Targeting & Tracking (WRD 2.62) Petroleum Refinery Process Safety Management (WRD 2.64) Severe Violator Enforcement Program (WRD 2.68) Chemical Facility Process Safety Management NEP (WRD 24.40) Process Safety Management (WRD 24.10)