The selected remedy, soil mixing using in situ chemical oxidation (ISCO) combined with in situ solidification and stabilization (ISS) was used to destroy contaminants while stabilizing soils
Bolzano, Italy
BTEX, petroleum hydrocarbons
ISCO was successfully combined with ISS at this site achieving all of the remedial goals common for redevelopment sites. Benzene and TPH (C4 to C12) were reduced to below the remedial goals. TPH (C13 to C40) were reduced and the residual contamination was then solidified into a matrix with a significantly lower permeability compared to the surrounding geology. Finally, the soils had targeted compressive strengths shortly after the application allowing for site activities during the application and rapid site redevelopment.
The rail yard site in Nijmegen, Netherlands has been subject to contamination via leaks, spills, and filling losses of hydrocarbon fuels over the years. Despite previous remediation attempts there remained residual TPH contamination. Following a successful bench test, a full-scale remotely controlled injection unit was used for implementation of alkaline activated Klozur® persulfate. The reduction of the TPH levels achieved the remedial goals in both the bench and fieldwork.
Site Closed Following a Single Application of Klozur® SP and Hydrated Lime.
The approach was designed to remove the lower molecular weight compounds, which are the more soluble and mobile fraction of the contamination, via chemical oxidation while cementing the remaining higher molecular weight fraction of the tar in place. The addition of cement was also intended to activate the Klozur SP by generating alkaline conditions, significantly improving the kinetics of the ISCO reactions.
Specialty Earth Sciences, LLC was contracted to remediate a site that was impacted by residual coal tar by utilizing chemical oxidation methodologies.
EcoVac Services implemented SURFAC® and ISCO-EFR® at this site to remove SPH and reduce BTEX concentrations below the site’s CALs.