A significant portion of the near-surface geology in Denmark includes glacial moraine deposits, much of which consists of clayey till. Consequently, subsurface releases and spills of chlorinated solvents at industrial facilities in Denmark often end up as a sorbed phase or nonaqueous phase liquid (NAPL) that resides in clayey till.
A significant portion of the near-surface geology in Denmark is comprised of glacial moraine deposits, much of which consists of clayey till. Consequently, subsurface releases and spills of chlorinated solvents at industrial facilities in Denmark often end up as a sorbed phase or nonaqueous phase liquid (NAPL) that resides in clayey till. After a chlorinated solvent has escaped into subsurface clay, it can be extremely difficult and costly to recover the solvent or remediate the clay due its very low permeability. In situ remediation technologies that may succeed at treating chlorinated solvents in sand and gravel aquifers often will fail in clayey till. Electrokinetic-enhanced bioremediation (EK-BIO) is an innovative technology for improving remediation in low-permeability formations such as clay till by using direct current (DC) electric fields to facilitate subsurface transport and delivery of bioremediation agents such as electron donors and dechlorinating bacteria. Recognizing that Geosyntec is one of the only engineering consulting firms that possesses expertise with this technology, the Capitol Region of Denmark retained the team of Geosyntec, NiRAS, and the U.S. Army Environmental Research and Development Center (ERDC) to design and execute an EK- BIO pilot test in clayey till at a Danish site.
© 2026 Geosyntec Consultants, Inc. All Rights Reserved.
