1. Engineer, Dept. of Civil, Geological and Mining Engineering, Polytechnique Montreal, Montréal, QC, Canada H3C 3A7 (corresponding author).
2. Engineer, Kemira Water Solutions Canada, Inc., 3405 Blvd. Marie-Victorin, Varennes, QC, Canada J3X 1P7.
3. Professor, Dept. of Civil, Geological and Mining Engineering, Polytechnique Montreal, Montréal, QC, Canada H3C 3A7.