Background

The Citychlor project was executed between 2009 and 2013 by a partnership between governments, research facilities and cities. In total, nine partners from Flanders, the Netherlands, France and Germany were involved in the project. In Flanders, these were, besides project coordinator OVAM, the cities Mortsel and Ghent, and in the Netherlands Bodem+ and the municipality of Utrecht. France was represented by INERIS and ADEME while ITVA and Landeshauptstadt Stuttgart participated for Germany. Besides these partners, professional federations, experts and remediation funds were also involved in the project.  

Challenge

Because of the specific physicochemical characterstics of chlorinated solvents, remediations of this type are complex and prolonged processes. Contamination with these components is often caused by small-scale activities such as dry cleaning or printing companies that gives remediation also a socio-economic impact. In densely built Western Europe, these sites are often situated in the middle of residential areas. This means that the contamination in many cases is located below the buildings and is therefore hard to reach.

Our solution

We installed 16 flux samplers (each with four pollutant cartridges and a waterflux cartridge) in different monitoring wells in the area of two source locations in the centre of Utrecht.

The CityChlor still remains the reference project concerning passive sampling and all documentation can be found on the website: http://rwsenvironment.eu/subjects/soil/projects/citychlor/ 

The in-depth final report on the applied flux measurements can be found in the annex.

Image European CityChlor project tests added value passive flux samplers in urban area Image 1
Image European CityChlor project tests added value passive flux samplers in urban area Image 2
Image European CityChlor project tests added value passive flux samplers in urban area Image 3
Image European CityChlor project tests added value passive flux samplers in urban area Image 4