Regulatory Update   |   May 16th, 2017 Vapor Intrusion Evaluation Process Continues to Evolve in Michigan


As the approach to vapor intrusion (VI) investigation and mitigation continues to evolve, TRC is tracking State-specific and Federal guidance, as well as policy and statutes to keep our clients abreast of important changes. At a recent meeting of the Michigan Association of Environmental Professionals (MAEP), the Michigan Department of Environmental Quality (MDEQ) gave a presentation titled “The Paradigm that is VI” which highlighted what many of us have already noticed. In the wake of the Flint water crisis, MDEQ has become more risk averse. One of the consequences has been a significant change regarding their approach to vapor intrusion assessment.

TRC’s latest Regulatory Update reviews details related to:

  • Tiered Assessment Process
  • Process Improvements
  • Proposed Timeline
  • Next Steps

With past regulatory rule changes, preemptive action from environmentally responsible parties may not have been necessary or advised. But this time, agencies are not waiting; both MDEQ and the Michigan Department of Health and Human Serves have begun to handle VI as an immediate concern for compounds with suspected developmental effects. At present, the number of sites exceeds current MDEQ staffing, so agency engagement may be unpredictable.

If you think your project site may become a VI concern under this rule change, TRC can help you understand your risks and navigate VI concerns to make forward progress during this uncertain regulatory climate.

For more information, please download our Regulatory Update or contact us.