1. Hydrologic Science and Engineering Program, Colorado School of Mines, 1500 Illinois St, Golden, CO 80401, USA
2. Department of Geology and Geological Engineering, Colorado School of Mines, 1500 Illinois St, Golden, CO 80401, USA
3. Department of Civil and Environmental Engineering, Colorado School of Mines, 1500 Illinois St., Golden, CO 80401, USA
4. Department of Environmental and Occupational Health, Colorado School of Public Health, University of Colorado Anschutz Campus, 13001 East 17th Place, Mail Stop B119, Aurora, CO 80045, USA
5. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA