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CLU-IN Studio 		spacer United States Environmental Protection Agency
ITRC 1,4-Dioxane: Science, Characterization & Analysis, and Remediation
Sponsored by: Interstate Technology and Regulatory Council
Original Time/Date of Training:
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March 25, 2021, 1:00 PM - 3:15 PM, EDT (17:00-19:15 GMT)
Training Course Overview:

1,4-Dioxane has seen widespread use as a solvent stabilizer since the 1950s. The widespread use of solvents through the 1980s suggests its presence at thousands of solvent sites in the US; however, it is not always a standard compound in typical analytical suites for hazardous waste sites, so it previously was overlooked. The U.S. EPA has classified 1,4-dioxane as "likely to be carcinogenic to humans." Some states have devised health standards or regulatory guidelines for drinking water and groundwater standards; these are often sub-part per billion values. These low standards present challenges for analysis, characterization, and remediation of 1,4-dioxane. The ITRC team created multiple tools and documents that provide information to assist all interested stakeholders in understanding this contaminate and for making informed, educated decisions.

The 1,4-Dioxane: Science, Characterization & Analysis, and Remediation training is a series of six (6) modules. The six individual modules will be presented together live, and then archived on the ITRC 1,4-Dioxane training webpage for on demand listening.

The modular 1,4-Dioxane training series provides an overview of 1,4-dioxane and presenting six sections from the ITRC guidance document (1,4d-1, 2021):

  • History of Use and Potential Sources (Sect 1)
  • Regulatory Framework (Sect 2)
  • Fate and Transport (Sect 3)
  • Sampling and Analysis (Sect 4)
  • Toxicity and Risk Assessment (Sect 5)
  • Remediation and Treatment Technologies (Sect 6)
After the six-part 1,4-Dioxane: Science, Characterization & Analysis, and Remediation series, you should understand:
  • The history of 1,4-dioxane manufacturing and usage and the potential sources of releases of 1,4-dioxane to the environment.
  • Primary state and U.S. federal regulatory programs of relevance to 1,4-dioxane
  • Key physical/chemical properties, and fate and transport processes that are relevant for 1,4-dioxane
  • Benefits and limitations of the available analytical methods
  • Risk drivers for human health and how ecological risk compares
  • How/when/why different treatment technologies are appropriate

We encourage you to use the ITRC 1,4-Dioxane products (14d-1) and these training modules to learn about 1,4-dioxane and how you can apply these best practices to improve decision-making at your sites.
For regulators and other government agency staff, this understanding of 1,4-dioxane can be incorporated into your own programs. This training summarizes the current understanding of 1,4-dioxane. While the training makes every effort to keep the information accessible to a wide audience, it is assumed that the participants will have some basic technical understanding of chemistry, environmental sciences, and risk assessment. As with other emerging contaminants, our understanding of 1,4-dioxane continues to advance. This training provides the participants with information on areas where the science is evolving and where uncertainty persists.
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