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PFAS: Dispelling Sampling Myths, Part 2

Event Announcement

Tuesday, Aug 20, 2019

About This Webinar:

Many sites have been required to add the analysis of Per-and Polyfluoroalkyl Substances (PFAS) to their ground water sampling plans. Military bases, airports, landfills and manufacturing facilities are sites where PFAS contamination may be present due to the use of PFAS in activities such as fire suppression or plastic manufacturing. Collecting samples for PFAS is very different from sampling for fuels, solvents, and other chemical contaminants, as potential sources of PFAS are nearly everywhere - in waterproof clothing and field gear, personal care products, and sampling equipment. But, is there really a risk from all of these sources? Do we need to eliminate all of these items to avoid sample contamination? And what about the fluoropolymers like Teflon that has been used in sampling equipment for more than three decades? Can we use these systems to collect samples for PFAS analysis or do we need new equipment that is entirely free of all fluoropolymers?

Currently there are no EPA approved methods for PFAS analysis of matrices other than finished drinking water. For all other matrices, a 537 Modified method, using isotope dilution, is commonly used and is widely accepted as the gold standard. As 537 Modified remains a user defined method there is no standard method for sample collection, handling, or quality control. Particular attention should be paid to the details of the methodology employed and the quality assurance protocols applied by the supporting laboratory and field sampling team.

In this webinar, David Kaminski with QED Environmental Systems will explore the sources of PFAS sample contamination and dispel some of the myths and speculation surrounding the issue. Taryn McKnight with Eurofins TestAmerica will illuminate the multitude of parameters and best practices to adopt when 537 Modified is being applied.

Topics the Presentation Will Cover Include:

- A review of published guidance
- Sampling system materials - what works, what doesn't?
- Avoiding obvious sources of contamination
- PFAS free DI water and sample containers
- Shipping considerations for PFAS
- Sample preservation and filtration 
- Quality control samples

A question and answer session will immediately follow the presentation. At the conclusion of each webinar, you will be asked for your feedback and opinions for future webinar topics to be developed by TestAmerica.

August 20, 2019