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 Part 5 - TOP Assay: One Way to Look at Future Risk from Precursors

Part 5 - TOP Assay: One Way to Look at Future Risk from Precursors

Tuesday, June 30, 2020 - 1:30 P.M. EDT

Participate in ALL 6 PFAS Webinars:

PFAS Basics, Part 1
PFAS: Dispelling Sampling Myths, Part 2
PFAS: Data Defensibility and Usability,Part 3
PFAS: Advanced Discussion of Site Investigation Challenges and Best Practices, Part 4 
TOP Assay: One Way to Look at Future Risk from Precursors, Part 5
PFAS: Source and Ambient Air, Part 6

About This Webinar:

In 2006, the United States Environmental Protection Agency (US EPA) announced the PFOA Stewardship Program, to phase out the emissions and the use of long-chain perfluorinated chemicals (PFCs) as these chemicals are persistent, bioaccumulative, and toxic. In addition, the US EPA and State agencies have developed health advisories, screening levels, and action limits for a number of Perfluoroalkyl Acids (PFAAs), making this group of compounds the risk drivers in most cases.

Current analytical methodologies measure a discrete list of approximately 40 (PFAS) compounds. Many additional PFAS are not determined as discrete compounds by existing commercial methods. Hence, we may be underestimating the PFAS mass present in the environment. There is significant pressure from the public, environmental agencies, and others to apply methodologies that more closely measure the full extent of PFAS contamination.

Eurofins implemented the TOP Assay as a solution to this problem. The TOP Assay rapidly converts PFAA precursors into PFAAs, including PFOA, replicating what micro-organisms in the environment would achieve over time. This quantifies the sum of PFAS that could be converted to PFAAs in the environment. TOP Assays have revealed that for AFFF-impacted sites, existing analytical methods only detect an estimated 30% to 50% of the total PFAA mass present as PFAA precursors.

Topics the Presentation Will Cover:

  • What is the TOP Assay
  • How does it work?
  • TOP Assay chemical reaction
  • What do the results mean?
  • What are the limitations of the assay?
  • Future concerns
  • Capabilities and questions

A question and answer session will immediately follow the presentation. 

June 30, 2020 - 1:30 P.M. EDT

 *Webinar has ended.

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PDH Credit:

All webinar attendees will receive a certificate of attendance with PDH Credit issued by EETA. Certificates will be emailed on the Friday following the presentation. Contact your state to determine whether these credits meet the guidelines set forth by your state's board.

The Presenter:

Charles Neslund

PFAS Practice Leader & Scientific Officer

Eurofins Environment Testing America


To view a recorded version of this webinar, please contact patricia.mcisaac@eurofinset.com.