Advances in Remediation Solutions Webinar Series: Making Strides in Management of Emerging Contaminants, Part 1 — 1,4-Dioxane (#881)

Presented on Thursday, August 4, 2016

You will learn about the history and challenges of 1,4-dioxane, and explore options stakeholders should consider in developing risk management, investigation, and remediation strategies during this one-hour online offering.

The definition and terminology associated with “emerging contaminants” have evolved rapidly in the past few years and are generally being applied to compounds where the risks to human health and the environment are not entirely understood.

This includes 1,4-dioxane, normally thought of as a stabilizer in 1,1,1-trichloroethane — but also prevalent in personal care products and detergents.

As more states adopt, or lower, 1,4-dioxane regulatory standards, it is becoming an increasing concern for existing remediation sites. The challenges are that most treatment systems designed for chlorinated solvents won’t work for 1,4-dioxane and the conventional approaches are expensive. There’s also a gap in our understanding of natural degradation and attenuation of 1,4-dioxane.

The take-home message is that before your retrofit your existing remedy, you should understand the potential benefits of monitored natural attenuation (MNA) and surgical source treatment.

Learning objectives

After attending this webinar you will be able to:

  • Identify and investigate the sources of 1,4-dioxane
  • Develop the conceptual site model to identify the mass flux
  • Evaluate remediation options for 1,4-dioxane
  • Develop a strategy for evaluating MNA for 1,4-dioxane.

Caitlin Bell, PE
Arcadis, San Francisco, CA
Caitlin H. Bell, PE, a principal engineer and the lead expert on 1,4-Dioxane for Arcadis, with nearly 10 years of consulting experience. A remediation engineer who focuses on subsurface treatment of soil and groundwater using in situ techniques, she specifically focuses on in situ bioremediation applications for a variety of chemicals of concern, including emerging contaminants. Ms. Bell serves as a technical resource to clients on topics such as molecular biology tools, bioaugmentation, compound-specific isotope analysis, and challenging bioremediation approaches for compounds like 1,4-dioxane. She was a member of the team who authored the Interstate Technology & Regulatory Council’s Environmental Molecular Diagnostics technical guidance document and has presented routinely on remediation topics at industry conferences. Ms. Bell is also a coauthor of the upcoming book, Handbook of Emerging Contaminants. She holds a B.S. in chemical engineering and an M.S. in environmental engineering.

Grant R. Trigger, J.D.
RACER Trust, Detroit, MI
Grant R. Trigger, J.D., a cleanup manager with RACER Trust, is responsible for planning and directing the cleanup and preparation for redevelopment of 56 properties in Michigan previously owned by GM. He has 40 years’ diverse experience in the environmental industry, working as an environmental engineer for 10 years, 20 years as an environmental attorney, and five years in brownfield redevelopment prior to joining RACER. Trigger was recognized among the best lawyers in America in 2006 and developed the implementation strategy for the Fairlane Green project that won the top national Phoenix Award for excellence in brownfield development in

Suthan Suthersan, Ph.D., PE
ARCADIS, Newtown, PA, United States
Suthan Suthersan, Ph.D., PE, is chief technical officer of Arcadis, a global engineering services company. He has enabled Arcadis to be one of the most respected knowledge-based environmental services companies in the world through his contributions toward technology development, and developing best practices and knowledge-sharing platforms. Suthersan’s expertise and experience are gained from participating in hundreds of environmental remediation projects in the United States, Canada, Europe, Latin America, and Asia. Suthersan has authored four books in remediation engineering and has been awarded 20 patents for remediation technology applications. His column, “Advances in Remediation Solutions,” is regularly featured in NGWA’s Groundwater Monitoring & Remediation®. He founded the biannual RemTEC conference and is currently collaborating with NGWA on a future conference, Groundwater Solutions: Addressing Emerging Issues and Reclaiming Groundwater Resources.

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