ABSTRACT
Hydrogen concentrations in groundwater might be important in two ways. Firstly, the hydrogen concentration can be used to characterize the redox conditions. Secondly, hydrogen might be an indicator for the in situ condition for dechlorination. These two potential applications of hydrogen measurements were tested by field research at three sites contaminated with chlorinated solvents and at one landfill site. Besides hydrogen concentrations, also other groundwater parameters were determined. Different methods for data interpretation were used and compared. Redox characterization using hydrogen measurement has proved to be a reliable and cost-efficient method to characterize the redox situation at the investigated sites. Furthermore, hydogen may indeed be an indicator for the in situ dechlorination condition.
