Taastrup

Microscale zero valent iron (mZVI) and nanoscale ZVI (nZVI) are often effective amendments for remediation of chlorinated solvents in aquifers, but success with mZVI and nZVI in aquitards such as clay till is rare when conventional injection techniques are used. Jet Injection, a technology developed by FRx that involves a combination of hydraulic fracturing and jetting, was previously demonstrated to effectively distribute sodium permanganate in a tight clay formation. Jet injection forces large volumes of water under very high-pressure into the subsurface inducing fractures that can be filled and further propagated with a slurry of remediation treatment agents such as permanganate or mZVI. Recognizing that Geosyntec possesses expertise with this technology, the Capitol Region of Denmark retained the team of Geosyntec, FRx, and COWI A/S to design and execute a jet injection pilot test in clay till at a Danish site.