Rules Under Development

Crystalline Silica

All updates for this rule:

Respirable Crystalline Silica (Chapter 296-840 WAC), WAC 296-841-20025, WAC 296-307-62625

The purpose of this proposal is to add new chapter 296-840 WAC, Respirable Crystalline Silica, to address and limit worker exposure to respirable crystalline silica in workplaces, with the intent of curbing lung cancer incidents, silicosis, chronic obstructive pulmonary disease and kidney disease in Washington workers. The Occupational Safety and Health Administration (OSHA) estimates that an approximate number of two million construction workers are exposed to respirable crystalline silica in over 600,000 workplaces and 295,000 workers in over 75,000 general industry and maritime workplaces. Thus, Federal OSHA requirements pertaining to respirable crystalline silica in both 29 CFR 1926.1153 (Construction) and 29 CFR 1910.1053 (General Industry/Maritime) went into effect June 23, 2016. DOSH did not have a standard that specifically addressed respirable crystalline silica exposure in the workplace, thus we are combining OSHAs two rules into an entirely new chapter to ensure that Washingtons occupational safety and health rules are at least as effective as those promulgated by OSHA. Furthermore, WAC 296-841-20025, Permissible exposure limits (PELs), and WAC 296-307-62625, Permissible exposure limits of air contaminants, will be updated to reference the respirable crystalline silica rule.768.


Comments Due


Public Hearing


PDF: Proposed Rulemaking (CR 102)

PDF: Proposed Rule Language


PDF: Preproposal (CR-101)

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