Contamination from chlorinated solvents at Naverland 26AB is classified as one of the most contaminated sites in Denmark - a mega site. The pollution threatens the groundwater abstraction to Glostrup Water Utility and HOFOR (the utility company of Copenhagen).
Ramboll constructed a flow and transport model in order to simulate the extent of the contaminate plume under different abstraction rates and pumping constellations. The model was calibrated based upon monitoring data collected from around the site.
The model results illustrated the predicted extent and concentrations of the pollutant plume and the contaminant mass fluxes at the source area were calculated under the different scenarios. Based upon these results, Ramboll provided a screening of and recommendations for potential remediation methods and protective actions that could be taken in order to protect the abstraction wells for the two water supply companies.
The flow and transport simulations were conducted using the groundwater model MikeSHE. In order to support the best possible input to the model, Ramboll also conducted pumping tests, borehole flow logs, and groundwater head measurements. Ramboll also designed and carried out depth specific groundwater sampling.