1. Department of Environmental Engineering, Norwegian Geotechnical Institute (NGI), P.O. Box 3930 Ullevål Stadion, N-0806 Oslo, Norway
2. Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
3. Department of Applied Environmental Sciences (ITM), Stockholm University, 10691 Stockholm, Sweden
4. Department of Plant and Environmental Sciences, University of Life Sciences (UMB), 1432 Ås, Norway
5. Energy and Environmental Research Center, University of North Dakota, Grand Forks, North Dakota 58201, United States