The conference took place on March 19, 2026, in Saskatoon, Canada.
Emmanuel is a Professional based in Saskatchewan with experience in a wide range of environmental site assessment and remediation projects in Canada and the United States.
Ashkan is a Principal Environmental Engineer and Risk Assessor based in Ontario with more than 15 years of experience assessing and managing contaminated sites across Canada.
Ron is a Senior Professional Scientist based in California with more than 20 years of experience implementing and operating large, multi-year remediation programs at sites in the United States and Canada.
Jennifer is a Senior Hydrogeologist based in Saskatchewan with more than 25 years of experience focused on managing environmental challenges at mining, industrial, and oil & gas project sites.
Spencer is a Senior Scientist based in Saskatchewan with experience in contaminated site assessment, remediation, regulatory engagement, and long-term groundwater monitoring. He serves as Vice President on the Board of Directors for SEIMA.
SustainTech brings together industry, consulting, government, and academic professionals to share practical solutions and emerging environmental technologies focused on sustainability across resource sectors.
More Information about SustainTech and Environmental Remediation
Learn more about the conference.
Learn more about SEIMA.
For more information on contaminated site assessment and remediation, contact Ashkan at AArefi@Geosyntec.com and Jennifer at Jennifer.Pretorius@Geosyntec.com.
To learn more about the presenters, click on their names below.
Geosyntec Contributions at SustainTech 2026
Thursday, March 19
Impacted Sites in Saskatchewan: From Discovery to Closure—What Drives Success
Moderator: Spencer Chad, PGeo
Integrated Remediation and Vapor Intrusion Risk Management for Legacy Dry-Cleaning Impacts in an Urban Mixed-Use Setting
Speakers: Emmanuel Olisa, PhD and Ashkan Arefi, PEng
Phytoremediation of Nitrogen-Impacted Sites: Adapting a Natural System for Site Cleanup
Speaker: Ron Gestler
Design and Construction of a Seepage Interception System for a Mine Tailings Facility
Speakers: Jennifer Pretorius, PhD, PGeo and Emmanuel Olisa, PhD
