This webinar will include live deliveries of two presentations from the recent FRTR Fall meeting, with updated information: "Best Practices for PFAS Sampling and Evaluation" "Clean Water Act Methods: Overview of EPA's CWA PFAS Method Activities". The science and technology of site characterization for per-and polyfluoroalkyl substances (PFAS) has advanced in the five years since FRTR last addressed the topic in 2018. Federal agency budgets for PFAS remediation have grown substantially during this time. As a result, site characterization efforts such as Remedial Investigations, as well as early response actions, are underway at many Federal facilities. Funding for field-scale projects to further advance PFAS characterization technology and methodologies also has increased substantially. This webinar will allow PFAS member agencies to share results of recent and on-going PFAS projects that are improving our understanding of PFAS characterization technologies. To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/FRTRFall23-BP-CWA_022824/