1. Freeport-McMoRan Copper and Gold, Green Valley, Arizona 85614, United States
2. Department of Mining and Mineral Engineering, University of Alaska Fairbanks, Fairbanks, Alaska 99775, United States
3. Mineral Industry Research Laboratory, University of Alaska Fairbanks, Fairbanks, Alaska 99775, United States
4. Water and Environmental Research Center, University of Alaska Fairbanks, Fairbanks, Alaska 99775, United States
5. Department of Civil, Geological, and Environmental Engineering, University of Alaska Fairbanks, Fairbanks, Alaska 99775, United States
6. Department of Biological Sciences, University of Alaska Anchorage, Anchorage, Alaska 99508, United States