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GeoPro Talk: Murphy’s Inference – Why the Open Excavation Looks Nothing Like the Cross Sections

March 25, 2026
Time: 10 AM PT
Location: Online
Instructor(s): Pete Craig and Reidar Zapf-Gilje

Description

Join us for a timely talk and discussion on Murphy’s Inference – Why the Open Excavation Looks Nothing Like the Cross Sections.

In this webinar, Pete Craig and Reidar Zapf-Gilje of GeoEnviroPro revisit past remediation projects to explore key questions: What happened? What went right? What went wrong? And how can the conceptual site model help us do better next time?

Originally recorded in 2017, this session continues to offer relevant insights for contaminated sites professionals today.

About Instructor(s)

Pete Craig and Reidar Zapf-Gilje

Pete Craig is a former consultant and current contractor with over 25 years of international experience in contaminated site assessment, site remediation and heavy civil. Since earning his undergraduate degree in Chemistry from UC Berkeley in 1996 and a Master’s in Environmental Engineering in Stanford in 1998, he has managed or been the senior technical lead on projects up to $200M in value across Canada and abroad, with hands-on experience in a range of complicated hydrogeological and chemical contexts.

Reidar Zapf-Gilje has directed and managed contaminated soil, groundwater and sediment projects from the initial investigations to implementation of remediation and/or risk management solutions. With over 40 years of experience, he provides specialist review and advice on brownfield remediation and redevelopment projects in Canada and abroad.  With a desire to see the development of a true community of contaminated sites professionals, Reidar founded GeoEnviroPro to bring practitioners, regulators and others together to share information and learn from one another’s experiences.

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