1. Hampton Roads Sanitation District, 1434 Air Rail Ave., Virginia Beach, Virginia, USA
2. Civil and Environmental Engineering Department, Virginia Tech, Blacksburg, Virginia, USA
3. Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois, USA
4. Department of Earth and Environmental Engineering, Columbia University, 500 West 120th Street, USA
5. DC Water Authority, 5000 Overlook Ave. SW, Washington DC, USA