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Jeff Gamlin
Jeff/DEN Gamlin

Principal Technologist

Jeff Gamlin is a principal technologist with Jacobs in Denver, Colorado. He has more than 20 years of experience evaluating, designing, and optimizing hazardous waste investigation and remediation approaches at military, municipal, industrial, and commercial facilities in North America, South America, Europe, Asia and Australia. He has served as the technical reviewer for emerging contaminants investigation activities in the U.S. and Australia, and has directed multiple emerging contaminants treatability tests. Jeff is responsible for Jacobs coordination with university partners to develop innovative sustainable remediation technologies via advancements in use of molecular and biological diagnostic tools, including leading Jacobs research and development efforts for pilot testing of cutting-edge bioremediation design approaches. He has multiple peer-reviewed journal publications and has presented internationally on these topics.


Results from a 1,4-Dioxane Biogeochemical Reactor Field Pilot Test

Recent advances in next generation sequencing (NGS), and other more advanced “-omics” approaches, offer an opportunity to incorporate in depth analysis of microbial ecosystems into bioremediation assessment, to better understand the presence, activity, and function of the ecosystem as a whole. This level of analytics has opened new insights into the focus we should give to contaminant degraders, the key microbial community members required to support robust degradation processes, and what to “feed” these systems for optimal degradation rates. We term this method of evaluation Microbial Community Structure Indexing (MCSI).

Based on these insights, new biogeochemical treatment media formulations have been recently pilot tested at multiple sites. This presentation will highlight two biogeochemical reactor configurations developed to treat 1,4-dioxane. Results from initial field-based pilot testing indicate an approximately 90% reduction in 1,4-dioxane concentrations and reduction of co-contaminants to non-detectable levels within an approximately 10- to 20-day hydraulic residence time.

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