1. a Department of Building, Civil and Environmental Engineering, Concordia University, 1455 de Maisonneuve Blvd. W., Montreal, Quebec H3G 1MB; Fax: (514) 848-3200
2. b Geoenvironmental Engineering Research Center, Cardiff School of Engineering, University of Wales, P.O. Box 917, Newport Road, Cardiff, Wales CF1 2XH
3. c Bivan Consultants, Environmental Division, 6550 Sherbrooke St. W., Suite 1415, Montreal, Quebec, Canada H4B 1N6