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Part 3 - PFAS: Data Defensibility and Usability

PFAS: Data Defensibility and Usability, Part 3

Tuesday, September 29, 2020 - 1:30 P.M. ET

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, Part 4 
PFAS: Forensic Tools: TOF, TOP Assay and Non-Target Analysis, Part 5
PFAS in Source and Ambient Air, Part 6

About This Webinar:

The chemistry and analysis of PFAS is unique and challenging. There is currently no consensus method for all environmental matrices or all target analytes. For all matrices other than finished drinking water, a 537 Modified method, using isotope dilution, is commonly used and is widely accepted as the gold standard in quantitation for challenging contaminants such as these.

Currently there are no EPA approved methods for the collection and analysis of PFAS in matrices other than finished drinking water. For all other matrices, a user-defined method and protocols must be used. As there is no standard method for sample collection, handling, or quality control measures, specific attention must be paid to the protocols employed by the laboratory and the field sampling team.

In order to meet client needs, environmental laboratories have adopted Method 537 and developed modifications to address non-potable water and solid matrices. The inconsistent adoption of these modifications yields opportunity for data variability over time and between labs. This soup of methods and analytical approaches has left stakeholders with the challenging job of navigating their options to make the right choice for their project objectives. Once the data have been reported the task of data review and validation begins and that process can feel somewhat daunting when it comes to this unique class of chemicals.

Taryn McKnight aims to provide clarity through a comparison of methods and a discussion about analytical parameters and their potential impact on data quality. An update on what is currently available in terms of published methods versus methods under development will be provided as well.
Charles Neslund of Eurofins Lancaster will take us on a deeper dive into data quality and usability considerations. This begins with what little published criteria we have. We will review the criteria outlined in EPA published method 537.1 as well as the criteria outlined in the DoD QSM Table B-15. Charles will provide a critical look at the potential impact of these criteria on data quality.

We hope you will walk away from this presentation with clarity regarding the methods conundrum and a higher comfort level around evaluating the usability and defensibility of PFAS data.

Topics the Presentation Will Cover:

  • Methods Comparison – what is available today and what is under development
  • Key analytical techniques and their impact on data quality
  • Quality Assurance Criteria - 537.1 and DoD QSM 5.3 Table B-15
  • Quality control measures and the impact on data quality

A question and answer session will immediately follow the presentation. 

September 29, 2020 - 1:30 P.M. ET

 *This webinar has Ended*

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PDH Credit:

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The Presenters:

Taryn McKnight

PFAS Practice Leader


Eurofins Environment Testing America


Charles Neslund

Scientific Officer

Eurofins Lancaster 

PFAS Practice Leader

Eurofins Environment Testing America

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