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Department of Ecology
Committees, Boards, and Workgroups

6PPD Action Plan

This page is run by the Washington State Department of Ecology and serves as a resource hub for those closely following 6PPD Action Plan development. For more information about 6PPD and other work we’re doing on 6PPD, please visit our 6PPD and 6PPD-quinone webpage.

The Washington State Departments of Ecology and Health are developing a 6PPD Action Plan (AP). The 6PPD AP will identify and consider actions that could be taken to mitigate current impacts from 6PPD-quinone and phase out 6PPD use in the future. We will develop the action plan in phases, with the first phase beginning in December 2023 with agency-wide scoping.

Phase 1 of action plan development will focus on research needs and data gaps around 6PPD. In subsequent phases, we will develop a set of actionable recommendations to reduce the impact of 6PPD and 6PPD-quinone on people and the environment.

To receive our monthly update about Ecology’s 6PPD work, including updates about the 6PPD Action Plan, subscribe to our email list.

Past Meetings

May 21, 2024 - Final Meeting

April 17, 2024 - Phase 1 Wrap-Up Meeting

March 26, 2024 - Working Meeting 3

March 5, 2024 - Working Meeting 2

February 13, 2024 - Working Meeting 1

January 24, 2024 - 6PPD Action Plan Advisory Committee Kick-Off

What is an Action Plan?

An action plan is a streamlined and action-oriented plan that allows flexibility in addressing emerging chemicals of concern. It is a new process that is intended to be concise and focus on recommending actions for chemicals, like 6PPD, which do not meet the persistent, bioaccumulative, and toxic (PBT) criteria. The 6PPD AP will be our second action plan.

Action plans do not follow the same process as chemical action plans (CAPs). CAPs are comprehensive plans that directly target persistent, bioaccumulative toxins or metals of concern, and they are required to meet all components in WAC 173-333.

6PPD Action Plan Phase 1 Goals

We are currently in the first phase of our 6PPD action plan development. During this phase, we will identify recommendations to fill data gaps and research needs.

For example, we do not know the impact that recycled tire products (like rubber mulch and crumb rubber) may have on aquatic ecosystems. By determining existing data gaps and research needs around recycled tire products, we can take a systems-view as we approach the 6PPD problem.

6PPD Action Plan Development Timeline - Phase 1

Development of the 6PPD Action Plan Phase 1 will take place from December 2023 through December 2024.

  • December 2023: Ecology, Health, and partner agencies scope 6PPD Action Plan Phase 1
  • January 2024 - March 2024: Document development for 6PPD Action Plan Phase 1
  • January 2024 - May 2024: Advisory committee meetings (six 2-hour meetings)
    • Kick-off meeting: January 24, 2024, from 10 a.m. to 12 p.m. PST
    • Three working meetings:
      • Tuesday, February 13, 2024 from 1 to 3 p.m. PST
      • Tuesday, March 5, 2024 from 1 to 3 p.m. PST
      • Tuesday, March 26, 2024 from 1 to 3 p.m. PST 
    • Phase 1 wrap-up meeting: Wednesday, April 17, 2024 from 10 a.m. to 12 p.m. 
    • Planning meeting: Tuesday, May 21, 2024 from 10 a.m. to 12 p.m. 
  • June 2024: Ecology staff complete draft of Phase 1 of the 6PPD Action Plan 
  • June 2024 - December 2024: Internal review of 6PPD Action Plan Phase 1
  • December 2024: Action Plan Phase 1 is published as part of a Legislative Report

About the Advisory Committee

Role of advisory committee members

Advisory committee members will use their expertise to identify data gaps and research needs surrounding the 6PPD problem. Advisory committee members will review scoping materials to provide feedback and insights, ensuring Ecology is considering as many perspectives and approaches as possible.

Time committment for advisory committee members

We will have six total advisory committee meetings. Meetings will take place from January 2024 through May 2024. Advisory committee members do not need to attend every meeting to participate in the advisory committee. We will work with advisory committee members to keep everyone up to date, including publishing meeting minutes and other resources on our project webpage throughout the duration of Phase 1. Advisory committee members are also welcome to delegate someone else to attend on their behalf if they are unable to attend a meeting.

Resources for advisory committee members

We will share resources with advisory committee members at least one week prior to each meeting. We ask that advisory committee members review any materials in preparation for each working meeting. After each meeting, we will also post meeting minutes to this project webpage so those who were unable to attend a meeting can stay up to date with Phase 1 development.

List of advisory committee members

  • Taylor Aalvik, Affiliated Tribes of Northwest Indians
  • Dylan Ahearn, Herrera
  • Vice Chairman Josh Bagley, Suquamish Tribe
  • Stephanie Blair, Washington State University - Puyallup
  • Angela Bolton, City of Bellevue 
  • Seth Book, Skokomish Indian Tribe
  • Katie Byrnes, Washington Conservation Action
  • Robert Campbell, LANXESS Corporation
  • Rebecca Cook, Spokane Tribe of Indians
  • Kathie Dionisio, Environmental Protection Agency 
  • Sean Dixon, Puget Soundkeeper Alliance
  • Jeff Durant, Flexys
  • Tanya Eison, Affiliated Tribes of Northwest Indians 
  • Keith Estes, Long Live the Kings 
  • Marc Gauthier, Upper Columbia United Tribes 
  • Catherine Gockel, Environmental Protection Agency 
  • Emily Gonzalez, Puget Soundkeeper
  • Justin Greer, United States Geological Survey 
  • Greg Haller, Northwest Indian Fisheries Commission
  • Melissa Heintz, ToxStrategies, LLC
  • John Herrman, Snohomish County
  • Sara Hutton, GSI (U.S. Tire Manufacturers Association)
  • Ed Kolodziej, University of Washington - Tacoma
  • Steve Laing, Trout Unlimited 
  • Caitlin Lawrence, Washington State University - Puyallup
  • Amber Lewis, Suquamish Tribe
  • Haley Lewis, Environmental Protection Agency
  • Holly Anna Littlebull, Yakama Nation, University of Washington
  • Eli Mackiewicz, City of Bellingham
  • Kierston Maxwell, University of Washington
  • Jen McIntyre, Washington State University
  • Jamie McNutt, Flexsys
  • Don McQuilliams, City of Bellevue 
  • Chelsea Mitchell, King County 
  • Aimee Navickis-Brasch, Evergreen StormH2O
  • Tracey Norberg, U.S. Tire Manufacturers Association
  • Alison Osullivan, Suquamish Tribe
  • Marissa Paulling, Northwest Indian Fisheries Commission
  • Augie Krupp, Molecular Rebar
  • Mary Rabourn, King County 
  • LeeAnn Racz, ToxStrategies, LLC
  • Gabby Rigutto, ChemFORWARD
  • Katherine Saluskin, Yakama Nation Tribal Health
  • Heidi Siegelbaum, WSU Stormwater Center
  • Neil Smith, Flexsys
  • Fran Solomon, Western Washington University
  • Shirlee Tan, Public Health Seattle King County 
  • Heather Trim, Zero Waste Washington
  • David Troutt, Nisqually Indian Tribe
  • Laurie Valeriano, Toxic Free Future
  • River Wan, Pierce County
  • Kenia Whitehead, GSI (U.S. Tire Manufacturers Association)

Future Phases of the 6PPD Action Plan

Given the many unknowns of 6PPD as a chemical of emerging concern, we will determine the goals for subsequent phases of the action plan as we work through Phase 1. During our final advisory committee meeting of Phase 1, we will request feedback to help us plan for these subsequent phases.

Overall, we will develop a set of recommendations to reduce the impact of 6PPD and 6PPD-quinone on people and the environment.

6PPD and 6PPD-quinone Resources

Resources by Ecology

Published research about 6PPD and 6PPD-quinone

6PPD and 6PPD-quinone research is occuring around the world. We've compiled a list of recently published research that informs Ecology's 6PPD work.

Other resources

Contact information

6PPD team
Department of Ecology | Hazardous Waste & Toxics Reduction Program
6PPD@ecy.wa.gov

ADA Accessibility: The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188. To request an ADA accommodation, contact Ecology by phone at 360-407-6700 or email at hwtrpubs@ecy.wa.gov. For Washington Relay Service or TTY call 711 or 877-833-6341. Visit Ecology’s website for more information.

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