Susan B. Welt, MPH, P.E.

Principal, Engineering

Bio

Ms. Susan Welt is a Registered Professional Engineer with more than 25 years of experience in environmental consulting and regulatory work.  She is a recognized expert in the field of subsurface vapor intrusion (VI) to indoor air having evaluated and mitigated the VI pathway at hundreds of major industrial and residential sites.  Ms. Welt is also an experienced manager of soil, groundwater, and sediment investigation and remediation projects at industrial sites, former manufactured gas plants (MGP), and U.S. Department of Defense (DOD) sites across the country.

Ms. Welt has extensive experience in design engineering, stakeholder negotiations, and management of complex environmental projects.  She has participated in the dispute resolution process to ensure that responsible parties implement the appropriate measures to reduce exposures from the soil vapor intrusion pathway and impacted groundwater. She has developed and implemented many forums for discussing the status and rationale for environmental work and the associated human health and environmental risks.

She served as a VI expert with the New York State Department of Health (NYSDOH), is a former member of the Interstate Technology and Regulatory Council (ITRC) VI team assisting with the development of its ITRC VI guidance document, and has been an invited speaker on VI topics.  Her MGP experience is broad and includes investigation, evaluation, engineering design, remedial oversight, and site management at many different sites.  She has researched various remedial measures to address residual MGP impacts, including development of risk-based remedial goals that incorporate bioavailability for MGP-impacted sediments.

Ms. Welt has authored numerous papers and given presentations on a variety of topics, including community relations; VI sampling, assessment, and mitigation techniques; risk‑based management of contaminated sediments; treatment of groundwater; in situ remedial methods for contaminated sediments and soils; health and safety; and building systems. She is also a Fellow of the Centers for Disease Control and Prevention Environmental Public Health Leadership Institute.