Unravelling PFAS Origins: Forensic Techniques with Radial and Stacked Bar Visualization

Radial diagram and stacked bar maps provide powerful and effective visualization tools for evaluating the relative contributions of different sites (or multiple source areas at a single site) to a commingled plume. These visual aids may also be used for forensic identification of precursor transformation pathways and as evidence of PFAS plume attenuation downgradient of a source zone. This webinar presents an AFFF-impacted site case study which illustrates the benefits of using radial diagram and stacked bar maps to enhance PFAS forensic assessments, including::

  • Review of PFAS forensic methods, including markers which may be used to distinguish between different types of PFAS sources and AFFF products
  • Specialized radial diagram methods for differentiating the relative contributions of different AFFF products used historically at an airfield
  • Advantages of using stacked bar maps for fingerprinting PFAS sources
  • Use of ratios for forensic identification of where precursor transformations are occurring
  • Forensic methods for evaluating whether PFAS at a site is related to anthropogenic background or site operations.
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Presented by:

Grant Carey, Ph.D.

Dr. Grant Carey is President of Porewater Solutions with more than 30 years of experience specializing in the characterization, modeling, and remediation of many impacted sites across North America. Grant also specializes in the development of innovative modeling and visualization tools for conducting PFAS forensic assessments and for evaluating long-term remediation strategies. Grant is currently involved with five SERDP-ESTCP projects where his main research focus is on PFAS transport and remediation. Grant is also an Adjunct Research Professor at Carleton University in Ottawa, Ontario.