Home > Events > 2021 > PFAS: Advanced Discussion of Data Defensibility and DoD QSM, Part 4 (1)

PFAS: Advanced Discussion of Data Defensibility and DoD QSM, Part 4

Event Announcement

Tuesday, Mar 16, 2021

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. 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.

Charles Neslund 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.

March 16, 2021