The efficient control of environmental impacts requires thorough knowledge of relevant underground process dynamics. Added reactant degradation and dispersal processes, microbial processes and migration dynamics need to be recorded precisely, in order to physically control and properly manage all procedures applied. Very often, it is only possible to precisely capture processes using online-sensor techniques. For this reason, Sensatec has been using in-situ sensor techniques right from the start and has acquired comprehensive knowledge in this field, assisting in highly efficient and economical environmental impact remediation procedures.