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EBC Emerging Contaminants Webinar: The Latest Info on 1,4-Dioxane

January 26, 2021 @ 9:00 am – 12:00 pm
375 Harvard Street

This EBC Emerging Contaminants webinar will provide an update on the state of the practice relative to the emerging contaminant 1,4-dioxane. 1,4-Dioxane was included on the 2012 Third Unregulated Contaminant Monitoring Rule (UCMR3) that required monitoring by public water systems during the period from 2013 through 2015.

1,4-Dioxane is a likely human carcinogen that has been used in food additives and laboratory and manufacturing processes. It is also a byproduct of many chemicals used in household products, personal care products, plastics, and polyester, and from the 1950’s to 1996, 1,4-dioxane was commonly used in chlorinated solvents. 1,4-Dioxane releases into the surrounding environment from wastewater discharge, unintended spills, leaks, historical disposal practices of host solvents, and unregulated manufacturing waste streams. These releases have impacted groundwater sites and potable drinking water sources across the country. Since no federal regulations currently exist for 1,4-dioxane, it is often overlooked as a contaminant of potential concern (ITRC, 2020). 

This update will focus on the history and uses of 1,4-dioxane, associated sampling precautions, the latest on 1,4-dioxane toxicity, recommendations and options for analytical methods in order to achieve low regulatory criteria, recent changes in our understanding of the biodegradability of 1,4-dioxane, and treatment options for this chemical.

A robust panel discussion with the audience will conclude the webinar.

Massachusetts Licensed Site Professional (LSP) Technical Credit: This webinar was approved by the Massachusetts LSP Board for 2.5 hours of technical credit.

Connecticut Licensed Environmental Professional (LEP) Credit: This webinar was approved by the Connecticut LEP Board for 2.5 hours of credit.

General Continuing Education Certificates are awarded by the EBC for this program (2.5 training contact hours). Certificates are automatically provided via email link for registered attendees at the conclusion of the webinar.

Final Agenda – Emerging Contaminants Webinar – The Latest Info on 1-4-Dioxane

Available presentations are posted to the Presentations section of the EBC website.



Program Co-Chairs:

  • Elizabeth Denly, Vice President, Quality Assurance & Chemistry Director, TRC
  • Jeffrey Hershberger, Senior Scientist, ESS Group, Inc.
  • Jim Occhialini, Specialty Services Practice Leader, Alpha Analytical

Speaker Agenda:

1,4-Dioxane History & Use and Sampling Precautions

  • Elizabeth Denly, Vice President, Quality Assurance & Chemistry Director, TRC

Update on the Toxicity of 1,4-Dioxane & Potential Implications for Drinking Water Quality Standards

  • Dr. Norman Forsberg, Senior Toxicologist, Arcadis U.S., Inc.

Analytical Challenges Associated with 1,4-Dioxane

  • Jim Occhialini, Specialty Services Practice Leader, Alpha Analytical

Biodegradability of 1,4-Dioxane and a Case Study

  • Will Harms, Senior Bioremediation Engineer, EHS Support
  • Jeffrey Hershberger, Senior Scientist, ESS Group, Inc.

Moderated Discussion

Attendee List

Randi Augustine MassDEP Environmental Analyst/Remedial Project Manager
Bob Bowden Fuss & O’Neill, Inc. Associate
Heidi Caprood Sanborn, Head & Associates, Inc. Project Manager
Deb Chiaraluna Eurofins TestAmerica Sr. Account Executive
Kalliope Chute Cape Cod Cooperative Extension Hazardous Materials Environmental Specialist
David Cochran CAMERON-COLE, LLC Principal Engineer
Matthew DeMarrais Needham Public Works Asst. Supt. RTS Division
Barbara Escobar Pima County RWRD Program Manager
Doug Fine MassDEP Assistant Commissioner, Bureau of Water Resources
Ben Fortson CAMERON-COLE, LLC Senior Geologist
Jennifer Griffith NEWMOA Project Manager
Dan Guglielmi MassDEP Environmental Engineer
Matt Heil Sanborn, Head & Associates, Inc. Vice President
Alexandria Hidrovo Weston & Sampson Engineer I
Erica Holm Emerald Necklace Conservancy Field Operations Coordinator
Bill Howard Waste Management of New Hampshire, Inc. District Engineer
Pamela Hoyt-Denison NH Department of Environmental Services Administrator, Waste Programs
Joe Jammallo Cushing, Jammallo & Wheeler, Inc. President
Larry Johnson CAMERON-COLE, LLC Director, Waste Management
Jeffrey Karp Sullivan & Worcester LLP Senior Counsel
Katherine Kudzma VHB Director, Site Investigation & Remediation
Jim McQuade MassDEP Solid Waste Section Chief
Dustin Metz CAMERON-COLE, LLC Senior Geologist
Matthew Mostoller Acton Water District Environmental Manager
James O’Rourke New Hampshire Department of Environmental Services Hydrogeologist
Kristine Saffrin PerkinElmer Marketing Manager
Jennifer Sanborn Sanborn, Head & Associates, Inc. Project Director
Steven Sands Clean Earth Executive Vice President
Emilee Scott Robinson + Cole Partner
William Sexton GeoInsight, Inc. Senior Project Engineer
Michael Stephenson CAMERON-COLE, LLC President
Jeff Thelen Tighe & Bond, Inc. Principal Hydrogeologist
Daniel Voisin Stone Environmental Senior Geologist
Kathleen Young PerkinElmer Environmental Market Leader

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