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PFAS Webinar Series

PFAS Webinar Series

About these webinars:

TestAmerica is offering a series of four webinars on ideas we believe are worth discussing about PFAS. The goal of this series is to review everything about PFAS from an introduction on the subject to finding out the myths and how to collect the correct data to understanding the TOP Assay.

Topics of discussion will include: Introduction to PFAS; Dispelling the Myths and Producing Defensible Data; Site Investigation Challenges and Best Practices; and Closing the PFAS Mass Balance (TOP Assay).

Sign up for each of our Four Part Webinar Series


NEW WEBINARS FOR 2019


 

Part 1- PFAS Basics: An Introduction to the Chemistry, Sources, Regulation and Analysis

Presented by Taryn McKnight, Product Manager, Eurofins TestAmerica

Date: August 13, 2019

About This Webinar:

Per- and polyfluoroalkyl substances (PFAS) are a family of synthetic compounds containing thousands of chemicals formed from carbon (C) chains with fluorine (F) atoms attached. PFAS are used in a wide variety of industrial and commercial products. PFAS are persistent in the environment and are resistant to typical environmental degradation processes. As a result, they are widely distributed and are found in soil, sediments, groundwater, air and tissue across the United States. According to the US EPA, certain PFAS can bioaccumulate in the human body, and there is evidence that exposure to PFAS can lead to adverse health outcomes.

This presentation will briefly cover the basic introductory topics of nomenclature, chemistry, sources, exposure, regulations, analysis and future concerns related to PFAS presence in the environment.

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Part 2 - PFAS: Dispelling Sampling Myths

Presented by Taryn McKnight, Product Manager, Eurofins TestAmerica & David Kaminski, Senior Vice President, QED Environmental Systems

Date: August 20, 2019

About This Webinar:

Many sites have been required to add the collection of Per-and Polyfluoroalkyl Substances (PFAS) to their sampling plans; including military bases, airports, landfills and manufacturing sites. 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. Currently there are no EPA approved methods for PFAS analysis of matrices other than finished drinking water or EPA published guidance with recommended sampling protocols which have been validated.


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.

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Part 2.5 - PFAS: Data Defensibility and Usability

Presented by Taryn McKnight, Product Manager, Eurofins TestAmerica & Elizabeth Wessling, Senior Vice President, MECX

Date: August 27, 2019

About This Webinar:

The chemistry and analysis of PFAS is unique and challenging. There is currently no consensus best 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 but inconsistently applied. Several other methods have been published for PFAS in non-potable and solid matrices including ISO Method 25101, ASTM D7979, D7968, and the EPA is in the process of validating a number of SW-846 methods with various analytical techniques and parameters for different matrices. The Department of Defense (DoD) has compiled rigorous quality assurance criteria for PFAS testing under Table B-15 of the Quality Systems Manual (QSM).

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. Elizabeth Wessling of MECX will take us on a deeper dive into data usability and data validation.

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Part 3 - PFAS: Advanced Discussion of Site Investigation Challenges and Best Practices

Presented by Karla Buechler, Technical Director

Date: September 10, 2019

About This Webinar:

With a thorough understanding of the fundamentals of per- and polyfluoroalkyl substances (PFAS), where they come from, and why we are concerned with them, we can dive into the next level. We have a number of rapidly evolving parameters to stay abreast of and incorporate into our assessments.

Our webinar will address several questions, including: How do the unique characteristics of PFAS cause them to behave in the environment? What implications does this have on the development of our conceptual site models, analytical approaches, and treatment technologies? What is the current regulatory climate, and how does this impact our choices and decisions?

We will look at USEPA’s progress on addressing these contaminants, and where the gaps in regulatory guidance impact our approach to site investigations. We will also explore how issues such as PFAS in complex matrices, the presence of precursors and the challenge of acquiring representative data will impact site remediation and future decisions around site closure.

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Part 4 - Closing the PFAS Mass Balance: The Total Oxidizable Precursor (TOP) Assay

Presented by Karla Buechler, Technical Director

Date: September 24, 2019

About This Webinar:

Current analytical methodologies measure a discrete list of ~20 (PFAS) compounds. Many additional PFAS are not determined as discrete compounds by existing analytical methods, including Method 537. Hence, we may be underestimating the PFAS risk potential 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.

TestAmerica Sacramento implemented the TOP assay as a solution to this problem. The TOP assay rapidly converts PFAA (perfluoroalkyl acids) precursors into PFAAs including PFOA, replicating what micro-organisms in the environment would achieve after many years. 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.

In this presentation, we will discuss PFAS generation, formation and environmental release to sampling and analysis. We will also discuss the current regulatory status of these chemicals.

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PFAS Forecast: A look at what is to come in 2020

Presented by Karla Buechler and Taryn McKnight

Date: To Be Determined January 2020.

About This Webinar:

Per- and polyfluoroalkyl substances (PFAS) are in the news across the states, and they have become a growing topic of discussion amongst environmental practitioners, at all levels of regulatory agencies, and they are certainly a hot topic at conferences. If you have tuned in at all during 2019, you likely heard a lot of speculation as to where we are headed in 2020. There has been a lot of activity, shifting priorities, and responses to new information that makes some of these targets difficult to keep track of.

In the spirit of the season, we have cataloged what we know is in progress, and what the prospects for 2020 look like as we kick off the New Year.

The Presenters:

 

Taryn McKnight

PFAS, Air, Vapor Intrusion

Product Manager, TestAmerica

David Kaminski

Senior Vice President of QED Environmental Systems

Elizabeth Wessling

Senior Vice President, MECX

 

Karla Buechler

PFAS, Explosives and LCMS Support

Corporate Technical Director, TestAmerica


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