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Porewater Concentrations and Bioavailability: How You Can Measure Them and Why They Influence Contaminated Sediment Remediation

Superfund Research Program

NARPM Presents and Risk e-Learning are offering a four-part webinar series to help you understand why, how, and when to measure porewater concentrations and bioavailability as part of contaminated sediment assessment and management. Hosted jointly by the EPA Contaminated Sediments Forum and the National Institute of Environmental Health Science’s Superfund Research Program, this webinar series will also focus on the use of passive sampling devices (PSD) and what they tell us about contaminant bioavailability. Previously held as a course at the National Association for Remedial Project Managers (NARPM) Training Program  meeting, the webinar series features experts in the field of porewater and bioavailability and includes lectures and case studies, including practical tips to maximize the utility of porewater and bioavailability measurements.

Presenters will explain the basics of chemical fate, transport, and uptake, with a focus on porewater as a key route of exposure and a strong indicator of bioavailability. PSDs are a promising technology for measuring porewater concentrations and assessing bioavailability, particularly for common sediment contaminants such as polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), chlorinated pesticides, and dioxin-like compounds. The webinar series will include information about direct measurements of porewater, such as centrifuging sediment samples or Henry Samplers, which may also be used and are particularly useful for measuring metals.

Session I – Introduction to Porewater, Bioavailability, and PSDs
October 6, 2014, 12:30-2:30 p.m. EDT
Registration for this webinar is available on EPA's Clu-in Training & Events Web page .

  • Introduction and Moderation: Heather Henry, Superfund Research Program
  • Presenter 1: Karl Gustavson, U.S. Army Corps of Engineers
    Presentation Title: Porewater and Bioavailability at Contaminated Sediment Sites
  • Presenter 2: Rob Burgess, EPA Office of Research and Development
    Presentation Title: Passive Sampling for Measuring Freely Dissolved Contaminants in Sediments: Concepts and Principles
  • Presenter 3: Marc Greenberg, EPA Environmental Response Team
    Presentation Title: Passive Sampling Methods for Managing Contaminated Sediments: Risk Assessment & Management

Session II – PSDs for Organic Contaminants
November 19, 2014, 2:00-4:00 p.m. EST
Registration for this webinar is available on EPA's Clu-in Training & Events Web page .

  • Introduction and Moderation: Matthew Lambert, Office of Superfund Remediation and Technology Innovation
  • Presenter 1: Keith Maruya, National Institute of Environmental Health Sciences
    Presentation Title: Passive Sampling Methods for Managing Contaminated Sediments: State of the Science
  • Presenter 2: Upal Ghosh, University of Maryland Baltimore County
    Presentation Title: Passive Sampling for the Measurement of Freely Dissolved Contaminants in Water: Practical Guidance

Session III – Metals and PSDs
December 1, 2014, 12:30-2:30 p.m. EST
Registration for this webinar is available on EPA's Clu-in Training & Events Web page .

  • Introduction and Moderation: TBD
  • Presenter 1: Mark Cantwell, EPA Office of Superfund Remediation and Technology Innovation
    Presentation Title: Methods for Measuring and Assessing Dissolved Metals in Sediment Porewaters
  • Presenter 2: Chris Eckley, EPA Region 10
    Presentation Title: Measurements of Mercury Methylation in Porewater: A Case Study from the Black Butte Mine Superfund Site, OR

Session IV – Case Studies: PSDs for Organic Contaminants
December 15, 2014, 12:30-2:30 p.m. EST
Registration for this webinar is available on EPA's Clu-in Training & Events Web page .

  • Introduction and Moderation: TBD
  • Presenter 1: Judy Huang, EPA Region 9
    Presentation Title: Case Study: Palos Verdes Shelf
  • Presenter 2: Rachelle Thompson, EPA Region 9
    Presentation Title: Passive Sampling Case Study: United Heckathorn Superfund Site

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