1. U.S. Geological
Survey, Colorado Water Science Center, Denver Federal Center, Bldg 53, MS 415, Denver, Colorado 80225, United States
2. U.S. Geological
Survey, Lower Mississippi-Gulf Water Science Center, 308 South Airport Road, Jackson, Mississippi 39208, United States
3. U.S. Geological
Survey, Eastern Energy Resources Science Center, Department of Geological
Sciences, University of Texas at El Paso, El Paso, Texas 79968, United States
4. U.S. Geological
Survey, New England Water Science Center, 10 Bearfoot Road, Northboro, Massachusetts 01532, United States
5. U.S. Geological
Survey, Texas Water Science Center, 1505 Ferguson Lane, Austin, Texas 78754, United States
6. Crustal Geophysics and
17 Geochemistry Science Center, Denver
Federal Center, Bldg 95, MS 963, Denver, Colorado 80225, United States
7. U.S. Geological
Survey, California Water Science Center, 6000 J Street, Placer Hall, Sacramento, California 95819, United States
8. U.S. Geological
Survey, National Research Program, 345 Middlefield Road, Menlo Park, California 94025, United States
9. U.S. Geological
Survey, Lower Mississippi-Gulf Water Science Center, 3095 West California, Ruston, Louisiana 71270, United States
10. U.S. Geological
Survey, Lower Mississippi-Gulf Water Science Center, 401 Hardin Road, Little
Rock, Arkansas 72211, United States