1. Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina 29625, United States
2. Research Center of Environmental Pollution (CICA), University of Costa Rica, 2060 San José, Costa Rica
3. Hazen and Sawyer, Fairfax, Virginia 22030, United States
4. Water Quality Research and Development Division, Southern Nevada Water Authority, Las Vegas, Nevada 89193, United States