Georg HoubenGeorg Houben, geologist, MSc & PhD from Aachen Technical University, senior hydrogeologist at the Federal Institute for Geosciences and Natural Resources, Hanover (Germany), previously five years in consulting and research, part-time lecturerat the University of Hanover (civil engineering) and a drillers craft school (basic course), numerous publications on hydrogeological topics including many on well aging and rehabilitation (several peer-reviewed). Christoph Treskatis, geologist, MSc & PhD from Aachen Technical University, senior consultant for hydrogeology and well construction, part-time lecturer at the Technical Universities of Aachen and Darmstadt (Germany) and at drillers craft school (basic and advanced course), numerous publications on hydrogeological topics including many on well aging and rehabilitation (some peer-reviewed) Read More Read Less