1. Assistant Professor, Dept. of Civil Engineering, Univ. of Toronto, 35 St. George St., Toronto, ON M5S 1A4 (corresponding author).
2. Associate Professor, School of Engineering, Univ. of Guelph, 50 Stone Rd., Guelph, ON N1G 2W1.
3. Manager, Sustainable Technologies Evaluation Program, Toronto and Region Conservation, 9550 Pine Valley Dr., Vaughan, ON L41 1A6.