Eric Lovenduski, Perri Silverhart, and Marleiah O’Neill Speak at Geology Days 2026

Eric is a Principal Environmental Scientist based in New York with more than 25 years of experience focused on soil and groundwater contamination. He specializes in evaluating and mitigating vapor intrusion and supporting carbon capture, utilization, and storage projects. Eric has provided technical support on vapor intrusion issues involving chlorinated volatile organic compounds and methane at nearly 100 sites across North America, as well as in South America and Australia.

Marleiah is a Senior Geologist based in New York with more than 15 years of experience focusing on geoscience and environmental applications, often to support habitat and wetland restoration. She often conducts soil sampling and data analysis to support field investigations, construction oversight, and groundwater monitoring.

Perri is a Geologist based in New York who focuses on geotechnical monitoring and sediment, soil, surface water, and groundwater sampling, as well as sampling for vapor intrusion. She conducts document reviews and data analysis for litigation support, assists with database management, and uses arcGIS to conduct data analysis and generate figures for reporting.

Geology Days 2026 brings together geoscience professionals, researchers, and students to share technical knowledge, discuss industry developments, and network with peers. 

NYSCPG is a professional organization that promotes the geosciences and supports the practice of professional geology through advocacy, education, and networking opportunities for geologists in New York State.

More Information

Learn more about the event.
Learn more about NYSCPG.
For more information about vapor intrusion sampling, contact Eric at [email protected] or Perri at [email protected].
For more information on porewater sampling, contact Marleiah at [email protected].
To learn more about our speakers, click on their names below.

Geosyntec Presentations at Geology Days

Advanced Vapor Intrusion Sampling Methods: High-Volume Sampling and Building Control Testing
Geosyntec Speakers: Eric Lovenduski and Perri Silverhart

Passive Diffusion Porewater Sampling for Evaluating Sediment Cap Performance in Long-Term Monitoring Programs
Geosyntec Speaker: Marleiah O'Neill