1. Norwegian Geotechnical Institute (NGI), P.O. Box 3930, Ulleva°l Stadion, 0806 Oslo, Norway
2. Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
3. German Environment Agency (UBA), Section IV 2.3 Chemicals, Wörlitzer Platz 1, 06844 Dessau-Roßlau, Germany