Ecological Risks of Per and Polyfluoroalkyl Substances (PFAS)
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Perfluoroalkyl and polyfluoroalkyl substances (PFAS) have been widely used in numerous applications since the 1950s, including aqueous film forming foams (AFFFs) used for fire suppression at airports, firefighting training facilities, and other industrial locations.

Many sites host ecological habitat or due to the offsite transport potential for PFAS, PFAS-impacted sites may affect nearby and downgradient areas. Ecological Risk Assessments (ERAs) are commonly needed at these sites to enable decision making related to investigation and remediation.

This presentation will provide an overview of PFAS ERAs, including a state-of-the-science overview of the fate, exposure, and toxicity of PFAS in ecosystems. Much of the presentation will focus on our recently-released guidance document on PFAS for the United States Department of Defense's Strategic Environmental Research and Development Program (SERDP), available for download at: This guidance provides pragmatic approaches for addressing PFAS ecological risks at AFFF-impacted sites but is also applicable to sites impacted by other PFAS sources. In addition, we will also provide practical examples from ERAs for PFAS conducted in the U.S. and Australia, including advice on decision-making approaches involving Australian and New Zealand guidelines for fresh and marine water quality.

Publication Summary

  • Geosyntec Authors: Jason Conder, Emily Larson
  • All Authors: Jason Conder, Emily Larson
  • Title: Australasian Land & Groundwater Association
  • Event or Publication: Event
  • Practice Areas: Per- and Polyfluoroalkyl Substances (PFAS)
  • Citation: Jason Conder, Ph.D. (California) and Emily Larson (Colorado) will present "Ecological Risks of Per and Polyfluoroalkyl Substances (PFAS)" for the Australasian Land & Groundwater Association (ALGA) webinar from 12:00 p.m. - 1:00 p.m. on Tuesday November 12, 2019.
  • Date: November 12, 2019
  • Publication Type: Platform Presentation