1. Department of Earth Sciences, University of Toronto, Toronto, Ontario M5S 3B1, Canada
2. The Chemours Company, Wilmington, Delaware 19899, United States
3. AECOM, Deepwater, New Jersey 08023, United States
4. Corporate Remediation Group, E. I. DuPont de Nemours and Company, Wilmington, Delaware 19805, United States
5. SiREM, Guelph, Ontario N1G 3Z2, Canada