University of Notre Dame
Dr. Graham Peaslee is an experimental nuclear physicist at the University of Notre Dame who has pioneered the development of the PIGE method to screen for PFAS in environmental samples. He has over 200 peer-reviewed publications in both basic and applied science - most with student co-authors.
Fluorine content survey of commercially available fire-fighting foams
In recognition of the contamination that Aqueous Film Forming Foams (AFFF) have caused in ground and surface waters, regulations governing their use have been proposed and enacted recently. As state and federal organizations switch to fluorine-free AFFF and the use of other classes of fire suppression foams, there is a question of which foams in commercial use are actually free of Per- and PolyfluoroAlkyl Substances (PFAS) and which foams (AFFF and class A foams) actually contain significant PFAS content. We have conducted a grab sample survey of fire-fighting foams used in civilian agencies around the US, and will present a preliminary snapshot of the occurrence and extent of total fluorine as well as individual PFAS found in use in fire fighting foams currently. This work will provide a benchmark to which to compare future surveys as the regulatory landscape changes. The total fluorine measurements were made on the foam concentrates directly by Particle Induced Gamma-ray Emission (PIGE) spectroscopy, which allowed us to survey hundreds of commercial products actually in use.