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Meetings & Hearings

Public hearing

Chapter 173-340 WAC, Model Toxics Control Act Cleanup Regulations

March 23, 2023, 10 a.m., Online webinar

We are holding two public hearings via webinar on our proposed amendments to Chapter 173-340 WAC. You can attend the webinars from any computer using internet access. The hearings will begin with a short presentation and question and answer session, followed by the opportunity to provide testimony.


The purpose of this rulemaking is to:

  • Improve the site hazard assessment and ranking process.
  • Revitalize MTCA cleanup program planning and assessment.
  • Update and clarify remedial investigation and remedy selection requirements.
  • Distinguish more clearly requirements applying to independent remedial actions.
  • Improve response to underground storage tank (UST) releases, and maintain federal approval of the state’s UST program, as required by Chapter 70A.355 RCW.
  • Strengthen environmental justice principles when prioritizing and cleaning up sites.
  • Advance public participation and tribal engagement.
  • Make the rule easier to use and understand.

Documents for review

We write rules to implement and enforce state and federal environmental laws and rules. We follow a three-phase process for rulemaking:

  1. Announcement and development
  2. Proposal
  3. Adoption

For each phase of the process, we update the rulemaking webpage and notify interested parties. We also file notice in the Washington State Register. To learn more about our rulemaking process, read the Frequently Asked Questions.

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March 23, 2023, 10 a.m.
Join online
Join by phone:
Meeting ID:
    856 6571 0963
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Clint Stanovsky
Cleanup Rulemaking Lead
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Comment period

Chapter 173-340 WAC, Model Toxics Control Act Cleanup Regulations — Proposed rulemaking
Closes: April 16, 2023, 11:59 p.m.
See details

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.