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Per- and Polyfluoroalkyl Substances (PFAS) Emergent ...
Per- and Polyfluoroalkyl Substances (PFAS) Emergent Contaminant Issues in MichiganJohn M. CuthbertsonDorin Bogdan, PhDAECOM Technical Workshop Series: PFASAECOM Technical Workshop Series: PFAS2 What is an Emerging Contaminant?Chemicals and materials that have pathways to enter the environment and present real or potential unacceptable human health or environmental eitherDo not have peer-reviewed human health standardsorStandards/regulations are evolving due to new science, detection capabilities or pathwaysAECOM Technical Workshop Series: PFAS3 PFAS s1940 s1950 sTeflon accidentally discovered in 1938 Teflon used in the Manhattan Project for the development of the atomic bombConsumer and industrial products (Polymers)Aqueous Film Forming Foam (AFFF) is developed1960 sAECOM Technical Workshop Series: PFAS1970 sUse of PFAS significantly expands in different and Evolution2000 sGlobal distribution of certain PFAS in biota Voluntary phase out of productsIncreased public scrutinyChanging regulatory climateLawsuit settlementsDevelopment and use of new PFASC urrentAECOM Technical Workshop Series: PFAS5 Terminology Evolution: PFCs vs.
• Per- and Polyfluoroalkyl Substances (PFAS) - Current PFC PFAS Perfluorinated All carbon atoms fully fluorinated. Polyfluorinated Some carbons are not fully fluorinated . AECOM Technical Workshop Series: PFAS 6 Chemical Properties “Per” – All of the C-H groups are replaced by C-F .
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