1. Environment Canada, Wastewater Technology Centre, Canada Centre for Inland Waters, 867 Lakeshore Road, Burlington, ON, Canada L7R 4A6
2. Present Address: Department of Civil Engineering, University of Toronto, 35 St. George St., Toronto, ON, Canada M5S 1A4
3. Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St., Toronto, ON, Canada M5S 3E5