This SERDP and ESTCP webinar will highlight DoD-funded research results on advanced modeling tools developed to predict and simulate PFAS fate and transport in vadose zone source areas at Department of DoD sites. Presenters will discuss how advanced model tools will enhance understanding of long-term PFAS-impacted sites and support remediation planning. This SERDP and ESTCP webinar will highlight DoD-funded research results on advanced modeling tools developed to predict and simulate PFAS fate and transport in vadose zone source areas at Department of DoD sites. Presenters will discuss how advanced model tools will enhance understanding of long-term PFAS-impacted sites and support remediation planning.