Gary Birk

Gary Birk

16 articles
United States Tersus Environmental

Biography

Gary Birk is Founder and Managing Partner of Tersus Environmental, based in North Carolina. He is a Professional Engineer registered in North Carolina, Virginia, and Florida and holds a bachelor’s degree in chemical engineering from North Carolina State University. With more than 40 years of experience, Gary has led the development and application of innovative in situ technologies for remediation of contaminated soil and groundwater at sites across North America, South America, Europe, Asia, and Africa. His work focuses on sustainable, green approaches to site restoration, with particular emphasis on bioremediation. In 2011, Gary commercialized EDS-ER™, a widely adopted water-mixable, vegetable-oil-based substrate that provides a long-lasting source of carbon and hydrogen for enhanced reductive dechlorination and related bioremediation processes. He has also developed practical design tools that have helped advance industry approaches to estimating substrate application rates. Gary is a co-inventor on seven U.S. patents related to soil and groundwater remediation.

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Showing 16 of 16
(Group 2, Poster Board #163) Heat-Enhanced Catalyzed Reductive Bioremediation
Gary Birk Tersus Environmental
David Alden Tersus Environmental
Guilherme Figueiredo Tersus Environmental
Jeff Roberts SiREM
+1 more
G6. Thermally-Enhanced In Situ Degradation Processes at Sub-Boiling Temperatures (Poster) Poster
G6.: Thermally-Enhanced In Situ Degradation Processes at Sub-Boiling Temperatures (Poster)
13th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 1, Poster Board #42) Forensic Applications of Groundwater and Contaminant Mass Flux Analysis in Aquifer Characterization
David Alden Tersus Environmental
Marjan Joris iFLUX
Erik Bosmans iFLUX
Gary Birk Tersus Environmental
B3. Tools for Assessing Contaminant Sources and Fate (Posters) Poster Poster
B3.: Tools for Assessing Contaminant Sources and Fate (Posters)
2025 Bioremediation Symposium
Can ISCO Promote Biodegradation? Synergistic Effects of Combining Sodium Persulfate and Sulfate-Enhanced Biostimulation Relying on Reusable Direct Push Points
David Alden Tersus Environmental
Carlo Bianco Politecnico di Torino
Gary Birk Tersus Environmental
David Wiley TWS Environmental
+2 more
D2. Innovative and Efficient Amendment Delivery Strategies (Platforms) Platform Attachment
D2.: Innovative and Efficient Amendment Delivery Strategies (Platforms)
2025 Bioremediation Symposium
Evaluating In Situ Carbon Tetrachloride Remediation: Insights from Diverse Performance Monitoring Tools
David Alden Tersus Environmental
Gary Birk Tersus Environmental
Corey Scales SiREM
Rod Baumann Trimedia
D4. Challenges in Application of Bioremediation Tools (Platforms) Platform Attachment
D4.: Challenges in Application of Bioremediation Tools (Platforms)
2025 Bioremediation Symposium
Advances in Heat-Enhanced Reductive Bioremediation
David Alden Tersus Environmental
Gary Birk Tersus Environmental
Michael Healey SiREM
John Sankey True Blue Technologies
E7. Advances in Heat-Enhanced Bioremediation (Platforms) Platform Attachment
E7.: Advances in Heat-Enhanced Bioremediation (Platforms)
2025 Bioremediation Symposium
Targeted TCE DNAPL Recovery from a Complex Bedrock Aquifer: Field and Laboratory Studies
Michael Healey SiREM
David Alden Tersus Environmental
Gary Birk Tersus Environmental
Sachin Sharma WSP
+1 more
D7. Bioremediation in Complex Geological Settings (Platforms) Platform Attachment
D7.: Bioremediation in Complex Geological Settings (Platforms)
2025 Bioremediation Symposium
Identifying Preferential Flow Paths Using iFLUX Samplers: Quantifying Groundwater and Contaminant Flux at Discrete Depths
David Alden Tersus Environmental
Marjan Joris iFLUX
Sarah Moore Tersus Environmental
Gary Birk Tersus Environmental
+1 more
F1. High-Resolution Site Characterization (HRSC) (Platforms) Platform Attachment
F1.: High-Resolution Site Characterization (HRSC) (Platforms)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
Evaluating In Situ Carbon Tetrachloride Remediation: Insights from Diverse Performance Monitoring Tools
David Alden Tersus Environmental
Rod Baumann Trimedia
Kevin Kuntze Isodetect
Philip Dennis SiREM
+1 more
G3. Compound-Specific Isotope Analysis: Case Studies in Evaluating Remedy Performance (Platforms) Platform Attachment
G3.: Compound-Specific Isotope Analysis: Case Studies in Evaluating Remedy Performance (Platforms)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 1, Poster Board #32) PFAS Flux Approach for Making Data-Driven Decisions in an Evolving Regulatory Environment
William Leys AECOM
Bram Van Humbeeck AECOM
Erik Bosmans iFLUX
Marjan Joris iFLUX
+2 more
A5. PFAS Fate and Transport at Contaminated Sites (Posters) Poster Poster
A5.: PFAS Fate and Transport at Contaminated Sites (Posters)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 1, Poster Board #129) Coupled Iron and Sulfate Reduction Drive Abiotic and Biogeochemical Pathways for Chlorinated Solvent Remediation
Sarah Moore Tersus Environmental
David Alden Tersus Environmental
Gary Birk Tersus Environmental
John Sankey True Blue Technologies
D1. Abiotic and In Situ Biogeochemical Processes: Applications and Lessons Learned (Posters) Poster Poster
D1.: Abiotic and In Situ Biogeochemical Processes: Applications and Lessons Learned (Posters)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 1, Poster Board #140) Why Am I Seeing Acetone in My Performance Monitoring?
Gary Birk Tersus Environmental
David Alden Tersus Environmental
Sarah Moore Tersus Environmental
John Sankey True Blue Technologies
+1 more
D3. In Situ Technologies: Lessons Learned (Posters) Poster Poster
D3.: In Situ Technologies: Lessons Learned (Posters)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 1, Poster Board #165) Advancing Biogeochemical Amendments to Enhance Coupled Iron and Sulfate Reduction for CVOC Remediation
David Alden Tersus Environmental
Gary Birk Tersus Environmental
John Sankey True Blue Technologies
Sarah Moore Tersus Environmental
+1 more
D7. Bioremediation: Advances in Amendment Formulations (Posters) Poster Poster
D7.: Bioremediation: Advances in Amendment Formulations (Posters)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 1, Poster Board #168) Enhanced Reductive Bioremediation via In Situ Alcoholysis of Electron Donor Amends for Chlorinated Solvent Source Zones
John Sankey True Blue Technologies
David Alden Tersus Environmental
Sarah Moore Tersus Environmental
Gary Birk Tersus Environmental
D7. Bioremediation: Advances in Amendment Formulations (Posters) Poster Poster
D7.: Bioremediation: Advances in Amendment Formulations (Posters)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 1, Poster Board #211) Rethinking Remediation: How Multiple Fluorescent Dye Tracers Changed Understanding of In Situ Remediation Performance
David Alden Tersus Environmental
Trevor Osorno Ozark Underground Lab
Gary Birk Tersus Environmental
F2. Conceptual Site Models: Improvements in Development and Application (Posters) Poster Poster
F2.: Conceptual Site Models: Improvements in Development and Application (Posters)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 1, Poster Board #240) Rethinking Remediation: How CSIA Changed the Game for Site Managers
David Alden Tersus Environmental
Daniel Bouchard GHD
Orfan Shouakar-Stash Isotope Tracer Technologies Inc.
Pat Mcloughlin MES
+1 more
G3. Compound-Specific Isotope Analysis: Case Studies in Evaluating Remedy Performance (Posters) Poster Poster
G3.: Compound-Specific Isotope Analysis: Case Studies in Evaluating Remedy Performance (Posters)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds
(Group 2, Poster Board #276) Enhancing Biodegradation in Clay-Rich Soils: A Combined ISCO and Biostimulation Approach Using Reinjectable DPT Points
David Alden Tersus Environmental
Carlo Bianco Politecnico di Torino
Gary Birk Tersus Environmental
David Wiley TWS Environmental
+1 more
H9. Low-Permeability Zone Treatment Approaches, Permeability Enhancements, and Case Studies (Posters) Poster Poster
H9.: Low-Permeability Zone Treatment Approaches, Permeability Enhancements, and Case Studies (Posters)
14th International Conference on Remediation of Chlorinated and Recalcitrant Compounds