1. Mott MacDonald Pte Ltd., Singapore.
2. Laboratory of Foundation Engineering, Soil and Rock Mechanics, Faculty of Civil Engineering, Ruhr-University Bochum, Universitätsstrasse 150, 44780 Bochum, Germany.
3. Golder Associates Ltd., 145 – 1st Avenue N, Saskatoon, SK S7K 1W6, Canada.