The US Environmental Protection Agency (EPA) Office of Research and Development has published an easily digestible information guide for site assessment and remediation practitioners who work on PFAS-contaminated sites. Topics covered include PFAS evaluation of site-specific groundwater vulnerability from PFAS-impacted soil, groundwater sampling for PFAS, and ways that surface chemistry and surfactant properties of some PFAS may impact their transport and fate. The document compiles information from three technical briefs that were originally released internally by EPA. The intended audience includes geologists, hydrogeologists, risk assessors, stakeholders such as state and federal regulators and others who work on PFAS-contaminated sites. Users should have a basic understanding of PFAS. Further information is available here.