Webinar: 6PPD & 6PPD-quinone: Understanding and Mitigating the Emerging Global Contaminants | ALGA
Building leaders in the sustainable management of contaminated land and groundwater



Webinar: 6PPD & 6PPD-quinone: Understanding and Mitigating the Emerging Global Contaminants



   Friday 29 September
  7am to 8.15am AEST

Free Registration

The Australasian Land and Groundwater Association (ALGA) and The Interstate Technology & Regulatory Council (ITRC) together are holding a Webinar on the emerging contaminants, 6PPD and 6PPD-quinone. The Webinar will feature speakers from the United States, Australia, and Europe (NICOLE). The aim of this Webinar is to provide background on 6PPD and 6PPD-quinone, review the environmental and health risks, and highlight what is being done globally to find a solution. Time will be allotted for audience questions and answers.

6PPD-quinone was an unknown chemical until 2020 when Tian et al. identified it as the toxic agent killing coho salmon in Washington State. 6PPD-quinone is a reaction product of ozone and 6PPD, a tire anti-degradant that has been used for decades throughout the world and is recognized as one of the most toxic chemicals compared to substances with USEPA aquatic life criteria. In the short time since 6PPD-quinone's isolation and characterization, scientists have been working to better understand its prevalence and behaviors in the environment. Science is emerging rapidly; this webinar will provide a brief overview of the current understanding of 6PPD-quinone sources, exposure, fate, transport, toxicity, and mitigation strategies. This webinar will also highlight policies, regulations, and government actions related to 6PPD-quinone from Australia, New Zealand, the EU, and the US.




Kelly Grant,
California Department of Toxic Substances Control



Kelly Grant is a senior environmental scientist in California’s Safer Consumer Products (SCP) program and has been there since 2018. At SCP, she helps to identify and find solutions to problematic chemicals in products, including 6PPD in tires. In addition, she serves as co-lead for the ITRC Tire Anti-Degradants (6PPD) Team. Prior to joining SCP, Kelly was a biology professor at a small university near Lake Erie, where her research used molecular biology to answer questions about toxicology, ecology, and environmental science. Before that, Kelly served as an American Association for the Advancement of Science (AAAS) Policy Fellow in U.S. EPA’s Design for the Environment. Her Ph.D. is in Molecular and Cellular Biology from the University of Washington in Seattle and her undergraduate degree is from Haverford College in Pennsylvania.


Tanya Williams,
Washington State Department of Ecology



Tanya Williams serves as the Washington State Department of Ecology’s 6PPD Lead Agency Planner. She coordinates 6PPD and 6PPD-quinone strategic planning across the department, interfaces with state, federal and Tribal governments, and is a lead for the ITRC Tire Anti-Degradant (6PPD) Team. Tanya is also the project manager for Ecology’s 6PPD action plan. This action plan will identify, characterize, and evaluate uses and releases of 6PPD and 6PPD-quinone, as well as recommend actions that Washington can take to protect human health and the environment from these chemicals.

Prior to her role at Ecology, Tanya spent 20 years as an environmental scientist at federal and local government departments, including at the U.S. Department of Energy’s Hanford Site. She specialized in the Clean Air Act, the National Environmental Policy Act, air dispersion modeling, health risk assessments, environmental management systems, environmental justice, and program development. Tanya is the outgoing Chair of the Air & Waste Management Association’s Environmental Justice Inter-Committee Task Force and is an ISO 14001:2015 Environmental Management Systems Lead Auditor. She received her Bachelor of Science in biology and Bachelor in Business Administration and Management from Eastern Washington University in Washington State.


Lokesh Padhye,
Associate Professor, The University of Auckland



Dr Lokesh Padhye is an Associate Professor of Environmental Engineering at the University of Auckland. He obtained his Masters and PhD in Environmental Engineering from the Georgia Institute of Technology, Atlanta. He is also a registered professional engineer (P.E.) with the Texas Board of Professional Engineers and Engineering New Zealand. Prior to joining the University of Auckland, he worked as a senior environmental engineer in Atlanta for three years and as an Assistant Professor at the Indian Institute of Technology Bombay for one year. Dr. Padhye was also a Visiting Scholar at the Massachusetts Institute of Technology (Cambridge, MA) from 2016-2019. Dr. Padhye's research interests are in the fields of water quality, water/wastewater treatment, and environmental contaminant remediation. His research group is particularly interested in studying the fate and treatment of emerging aqueous contaminants, including PPCPs, pesticides, PFAS, tire wear chemicals, packaging additives, and microplastics.

Bob Symons,
Eurofins Environment Testing Australia Pty Ltd



Bob Symons is the Regional Technical Manager for Eurofins Environment Testing Australia & Aotearoa New Zealand where he is responsible for emerging contaminants and sits on its PFAS global peer group. Bob has a PhD in Environmental Analytical Chemistry from La Trobe University and an undergraduate degree from Victoria University in Melbourne. Prior to joining Eurofins, Bob was the Laboratory Manager for the Organic Chemistry Unit at the Institute of Environmental Science & Research Limited in New Zealand and later setup Australia’s Dioxins Analysis Unit at the National Measurement Institute in Sydney. His research interests are the analysis of persistent organic pollutants using advanced mass spectrometric techniques as well as emerging contaminants such as 6-PPD quinone. Bob is a past member of NATA (National Association of Testing Authorities, Australia) Life Sciences Accreditation Advisory Committee and a current Technical Assessor for ISO/IEC 17025.


Sophie Claes,



Sophie Claes is Consulting Director at ERM with over 25 years of extensive experience in project management in national and international projects across different services (soil and groundwater projects, global audit programs, global monitoring programs, and operational performance projects) for a wide variety of clients. Sophie is currently managing a number of multi-year global programs for industrial and other clients as for example and CES (Specialty Chemicals Sector Group of Cefic) and the WBCSD (Tire Industry Project). Through those projects, Sophie has built experience with evaluating impact, risk and fate & transport of industrial chemicals and microplastics in the wider environment. As project manager Sophie is responsible for scheduling, budget tracking, invoicing, resourcing, risk and change management and follow-up of the timing and quality of deliverables for those projects.




Charles Reyes,
The Interstate Technology & Regulatory Council (ITRC)


Charles Reyes is the Director of the Interstate Technology and Regulatory Council (ITRC). He has over 15 years of experience supporting state and federal government agencies responsible for implementing environmental protection regulations, policies, and cleanup strategies and technologies in the United States. He joined ITRC in May 2023 and prior to joining ITRC, he worked for the Association of State and Territorial Solid Waste Management Officials (ASTSWMO) for 14 years in various capacities, most recently as Associate Director, and spent a few years as an environmental consultant. Charles holds a B.A. in Political Science – Legal Studies from Virginia Tech, and a Master Certificate in Supervisory and Human Resources Management from Michigan State University – Eli Broad College of Business.



Matthew Potter,
Australasian Land & Groundwater Association (ALGA)


Matthew Potter has been the Chief Executive Officer of ALGA since June 2022. Matther has 23 years of experience in the environmental services industry. Over his career he has worked across many facets of industry, including as a Consultant, Victorian Government employee, and contractor. This unique experience enables Matthew to intimately understand the needs of the various stakeholders and how to deliver the best outcome for its clients. Prior to joining ALGA, he was the Environmental Services Manager at HydroTerra where he oversaw the scoping, design, installation and maintenance of all of the environmental monitoring service delivery projects.

P.O. Box: 3199, Robertson, NSW 2577
+ 61 2 4885 1136


ACN 151 172 735
ABN 70 240 612 745
IRD 116 017 768

© Australasian Land & Groundwater Association 2024