Workshop TF1.

Managing per- and polyfluoroalkyl substances (PFAS) at your site: Key technical and regulatory issues associated with PFAS

Thursday, 12 September, 2019

Summary

Per- and polyfluoroalkyl substances (PFASs), including perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), have been released to the environment at many government and commercial facilities in Australia as a result a variety of industrial and consumer uses of PFAS, including aqueous film-forming foams (AFFF) to extinguish fuel-based fires. PFASs are particularly challenging to assess and manage at sites because they are persistent, often exceed screening- and risk-based concentrations, and are difficult and expensive to remediate.  Due to their mobility in the environment, PFAS are also extremely challenging to address because of their high off-site transport potential, often leading to regulatory concerns and active management in surrounding off-site areas. This presentation will provide an overview of PFAS sources, chemistry, environmental fate and transport, exposure, toxicology, and regulatory issues and occurrence with an emphasis on the state of knowledge regarding the characterization, risk management, modelling, and remediation of PFAS-impacted sites. Real-world case studies are used to illustrate key concepts, data visualization methods for source fingerprinting and evaluating the efficacy of precursor biodegradation along the flow path, and in-situ mass flux reduction of PFOS and PFOA.  The impact of interfacial adsorption on the transport and distribution of PFAS in unsaturated soils and groundwater systems will be discussed.  The development and testing of sequestration approaches for in situ treatment of PFAS-impacted groundwater will be presented, as well as a discussion of factors influencing the chemical reactivity of PFAS in groundwater.

Who should attend?

The workshop will be a valuable introduction to those who have no prior experience in PFAS (no prior knowledge is necessary).  However, whereas the PFAS field is rapidly evolving, the workshop will also be helpful source of the latest information for professionals currently working with PFAS sites.  The workshop will be of interest to regulators, local government officers, industry professionals and consultants looking to gain the latest insights into how PFAS assessment and management in Australia.

Detailed Course Outline & Schedule

Time Topic Presenter

9:00am

Introduction

  • Introduction to the trainers
  • Overview of the goals of the workshop
  • Attendees introduction and what they wish to gain from the workshop
Dr. Jason Conder

8:15am

PFAS Sources and Chemistry

  • Naming Conventions
  • Sources and Uses of PFAS
  • Fate & Occurrences
Dr. Jason Conder

9:30am

Site Characterisation

  • Key environmental compartments
  • Analytical chemistry methods and availability of providers
  • PFAS-specific sampling considerations
Dr. Rula Deeb

10:00am

Risk Assessment

  • Human and ecological exposures
  • Toxicology
  • Site-specific risk assessment approaches
Dr. Jason Conder

10:30am

Morning tea  

11:00am

Overview of Remediation Approaches

  • Treatment approaches for groundwater
  • Treatment approaches for soil
Dr. Rula Deeb

11:45am

Evolution of the Australian PFAS Market

  • Key PFAS sites and projects
  • Regulatory challenges
  • Trends in assessment and management
Dr. Lange Jorstad

12:15am

Morning Summary

  • Key resources and documents
  • Discussion
All

12:30pm

Lunch  

1:30pm

Topic: Factors influencing Transport

  • PFAS Transport and Fate
  • In Situ PFAS Reactivity
  • In Situ PFAS Sequestration
Kurt Pennell

2:15 pm

PFAS Transport Modeling

  • In Situ PFAS Sequestration Case Study at a Central Canada Site
  • Benefits and Limitations of Other Modelling Applications
Grant Carey

3:00 pm

Afternoon tea  

3:30 pm

Case Studies of PFAS Visualization

  • Radial diagrams for source fingerprinting, transport and biodegradation assessment
  • Other visualization methods
Grant Carey
5:00pm Close