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.