1. Environmental Science; Memorial University of Newfoundland; Corner Brook NL A2H 6P9 Canada
2. Technical Resource Branch; Saskatchewan Environment; 3211 Albert Street Regina SK S4S 5W6 Canada
3. Department of Geography and Environment; Mount Allison University; Sackville NB E4L 1A7 Canada
4. Environmental Systems Assessment Canada Ltd; Box 193 Pilot Butte SK S0G 3Z0 Canada