1. Office of Research and Development; U.S. Environmental Protection Agency; Cincinnati Ohio USA
2. Water Protection Division; U.S. Environmental Protection Agency; Atlanta Georgia USA
3. Science and Ecosystem Support Division; U.S. Environmental Protection Agency; Athens Georgia USA
4. Office of Monitoring and Assessment; U.S. Environmental Protection Agency; Wheeling West Virginia USA
5. Geographic Information Systems; Pegasus Technical Services Inc.; Cincinnati Ohio USA