Questions on TCE Risk Assessments? Save the Date

In August, I hosted an EDR webinar on vapor intrusion risk, titled Sorting Out the Implications of U.S. EPA VI Guidance. Vapor risk on commercial property deals is getting a great deal more attention—and not just because of the ASTM E 1527-13 Phase I ESA standard. The U.S. EPA is updating the federal vapor intrusion guidance and more states are amending risk based cleanup rules to address the vapor migration pathway.

“No longer can vapor risk be ignored, delayed or downplayed. Plenty of attorneys are out there arguing that vapor should have always been part of a CERCLA-driven Phase I ESA,” noted attorney speaker David Gillay at Barnes & Thornburg. David just reached out to give me a heads up that he’s speaking at a November event where he will focus on one of the topics that came up during the Q&A at our August webinar: understanding and applying reference concentrations for TCE.

The November 4th event is titled Practical Guidance for Contaminated Sites: TCE Risk Assessment and Management. David is on a panel addressing how the lack of a clear understanding of exposure dose and risk has the potential to slow down site closure, increase cleanup costs and curtail brownfield redevelopment projects. His panel will address the need to understand and communicate to stakeholders the differences between screening and cleanup and/or mitigation, how toxic effects are considered in developing current screening and cleanup levels and the need for a clear decision point when making action decisions on exposure levels. His session will address a number of areas of uncertainty regarding vapor risk, including:

How are developmental toxicity endpoints incorporated into the derivation of the reference concentration (RfC) value for TCE, and how are these endpoints considered in risk management decisions?

How can good science and good judgment be applied to make informed risk management decisions based on the RfC for TCE?

How can regulators and stakeholders improve the risk assessment and risk management of sites with TCE?

The full program agenda is posted here and you can register here.

The science surrounding the assessment and management of vapor risk is evolving quickly and this is the latest opportunity for engineers to stay up to speed on how to properly assess and manage TCE exposure.

Any questions? Feel free to email David Gillay directly at