December 8, 2021

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Jessica Evans and Dylan Eberle to Present on PFAS Sampling at the 2021 Great Lakes Virtual PFAS Summit

Jessica Evans (New York) and Dylan Eberle, Ph.D. (Massachusetts) will present "Use of Dual-Membrane Passive Diffusion Bags to Sample PFAS" at the 2021 Great Lakes Virtual PFAS Summit from 3:20 p.m. to 4:00 p.m. EST on December 8, 2021.

Jessica Evans is a Scientist with extensive experience conducting and planning sampling field events and is an expert in PFAS sampling techniques.  She has developed standard operating procedures for sampling PFAS in multiple media under NJDEP and NYSDEC guidance and assisted in the development of PFAS sampling plans for sites in New Jersey and New York.

Dylan Eberle is a Scientist with in-depth knowledge of PFAS chemistry. He is experienced in applying that knowledge to the design of PFAS field studies and data analysis. Dylan's analyses of PFAS results have been instrumental in determining the source of PFAS concentrations at several field sites.

The goals of this virtual event are to provide the most current and reliable science and policy, facilitate information sharing, and explore current and future research topics related to PFAS. Participants may include: local, state, and federal government officials; environmental consultants and vendors; academic researchers and students; industry managing PFAS contamination; and community organizations.

The Department of Environment, Great Lakes, and Energy's (EGLE) mission is to protect Michigan's environment and public health by managing air, water, land, and energy resources.


To evaluate dual-membrane passive diffusion bags (DMPDBs) as a viable sampling technique for per- and polyfluoroalkyl substances (PFAS), a study was conducted at a field site in New Jersey to evaluate the comparability of traditional low-flow purge and sample methodology with DMPDBs. The study was conducted at a subset of monitoring wells and tested for 26 PFAS compounds, including Perfluorooctanoic acid (PFOA), Perfluorononanoic acid (PFNA), and Perfluorooctanesulfonic acid (PFOS). The low-flow sampling was conducted using a Geotech bladder pump with low-density polyethylene (LDPE) bladders and high-density polyethylene (HDPE) tubing. The results were found to be comparable with at least 73% of the PFAS data at each well having less than 25% relative percent difference between DMPDB and low-flow techniques. In general, the DMPDB results were slightly higher. The DMPDBs were easier and less expensive to use than the low flow technique and required less time in the field. The implications on PFAS forensics will also be discussed.

More Information

About the event: EGLE - 2021 Great Lakes PFAS Summit (
About EGLE: EGLE - About EGLE (
For consultation regarding PFAS sampling, contact Jessica Evans at This email address is being protected from spambots. You need JavaScript enabled to view it. or Dylan Eberle at This email address is being protected from spambots. You need JavaScript enabled to view it..
Learn more about Jessica: Jessica Evans | LinkedIn
Learn more about Dylan: Dylan Eberle (