Acknowledgments 

ITRC and the Tire Anti-degradants (6PPD) Team express our gratitude to Ken Zarker for being the driving force behind this ITRC team. Ken was a pioneer in the field of pollution prevention and was involved in toxics reduction efforts with the automotive industry for many years. Some of his work at Washington Ecology focused on trying to identify toxics coming from cars that were causing coho mortality or URMS. After that chemical was finally identified as 6PPD-q, Ken encouraged Craig Manahan to submit a proposal for an ITRC team because Ken recognized the importance of sharing this information with other states, tribal nations, and municipalities. We are deeply saddened by his passing, though the legacy of his work lives on. 

The ITRC Tire Anti-degradants Team would like to express our gratitude to all who contributed and supported the efforts of the team to create the documents and outreach materials that are now available. 

First and foremost, we are grateful for and commend the hard work and dedication of all our active team members. In particular, we want to recognize the efforts of our subgroup leaders, without whom none of this would have been possible. Each one of them took time out from their busy schedules and displayed remarkable leadership during the development of the materials produced by this team. 

• José Zambrana and Christine Nancarrow led the Problem Formulation subgroup; the materials they produced morphed into the Introduction of this document. 

• Mike Garland and Dana McCue led the subgroup that wrote Section 2: Effects Characterization and Toxicity. 

• Rachael Lane and Rhea Smith led the Environmental Assessment Strategies subgroup. Their group produced Section 3: Properties of 6PPD and 6PPD-q; Section 4: Occurrence, Fate, Transport, and Exposure Pathways; and Section 5: Measuring, Mapping, and Modeling. 

• Madison Rose Bristol and Sigrida Reinis led the Solutions subgroup; the materials they produced became Section 6: Mitigation Measures and Solutions and Section 7: Policies, Regulations, and Laws. 

• Rachael Lane took on double responsibilities. She and Ryann Reents led the development and deployment of the training and outreach. 

Our team was fortunate and benefited from the active participation of subject matter experts who are leading the research on the many questions surrounding 6PPD and 6PPD-q. They include Rachael Lane, Rhea Smith, Susan Cormier, Ezra Miller, Lizbeth Seebacher, Mark Jankowski, Allen Brookes, Rich Baldauf, and Denis da Silva. Additionally, Jenifer McIntyre, Caitlin Lawrence, Andrew Patterson, Million Woudneh, Sara Nedrich, Katie Holzer, Brent Pautler, and Justin Greer shared their research with the team and kept us up to date on the latest developments on 6PPD and 6PPD-q. Thanks also go to Jamie McNutt and Sarah Amick, who brought our team up to speed on everything related to tires. 

The 6PPD team was exceptionally lucky to have thoughtful and active engagement from our USEPA liaisons and partners. In addition to the subject matter experts from USEPA listed above, we give many thanks to José Zambrana, Kathie Dionisio, and Heather Goss. Their participation markedly improved our deliverables and helped us reach consensus even though the science on 6PPD and 6PPD-q is rapidly evolving. 

We would also like to thank Seth Book and Marissa Pauling for providing expertise and guidance on tribal fisheries and treaty rights. 

Many thanks to all the contributing authors who are too numerous to name. The documents and our training materials are truly the result of a team effort. Thank you all—you have been wonderful to work with (see the full list of contributing authors below). 

Thank you to Craig Manahan and Anne Cooper Doherty. They proposed the 6PPD project to ITRC and initiated the formation of this team. 

ITRC staff members Marguerite Bennett, Carolyn Sistare, Evan Madden, and Derick Winn provided critical support throughout the course of the team’s work. Nicole Henderson, project support contractor, was also a helpful resource. ITRC Executive Director Charles Reyes has been incredibly supportive of our team as we navigated the unique challenges of working on a rapidly emerging chemical of concern. 

The help and support of the ITRC board has been instrumental. In particular, Claudio Sorrentino, ITRC Board Member and Team Leader Liaison, helped the team leaders set the tone for leading the team and provided guidance to get us through the rough patches. Thank you! 

These documents were improved significantly from their initial draft by the many comments received during our internal and external review periods. Special thanks go out to all of those who made comments and suggestions on each of the documents. We also acknowledge the tremendous amount of help and support gathered by the ITRC State Points of Contact during the review stages and state surveys. 

Additional thanks go to Heather Stettler for her rigorous technical editing of both the focus sheet and the larger document. 

Producing this document and training would not have been possible without the unflagging assistance of our Program Advisor, Steve Brauner. Steve seamlessly stepped in as Program Advisor midway through the team’s life cycle. He got up to speed quickly and jumped right into the project at our fall meeting. In addition to the logistics of running the team, Steve always asked thought-provoking questions that helped firm up the content of our document and training. His thoughtfulness and team-oriented spirit helped to maintain the character of our team, even through difficult team deadlines that often overlapped with deadlines from our “day jobs”. We are tremendously grateful for the work and dedication that Steve has provided the team. 

Team Members

State and Local Government

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City/Local Government

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Federal Government

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Public and Tribal Stakeholders

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Academia

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Emeritus

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Industry Affiliates

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