The soil and groundwater cluster is an active cluster, which was established in 2004. Until now, four cluster meetings have been held in each participants home country, including site visits, presentations with clients and participation in workshops.

There is a good level of communication on various topics, varying from risk assessment to geochemical modeling. Furthermore specific study topics for international students have been identified within the cluster.

NIRAS and Witteveen+Bos have successfully co-operated in a EU funded project in Serbia were several polluted sites have been ranked, investigated and remedial possibilities have been assessed and worked out in detailed plans. Several proposals have been drawn up together in various combinations. Furthermore specific knowledge on in situ thermal heating, present at NIRAS, has been implemented in a Witteveen+Bos project. Another example of the co-operation between the partners is the Tyréns trainee, who is employed at Witteveen+Bos to study Dutch soil remediation techniques.