1. Graduate
School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882-1197, United States
2. Environment Canada,
Aquatic Contaminants Research Division, 867 Lakeshore Road, Burlington, Ontario L7S 1A1, Canada
3. Ontario Ministry
of the Environment and Climate Change, Water Monitoring Section, 125 Resources Road, Toronto, Ontario M9P 3V6, Canada