1. Office of Research and Development, Center for Environmental Solutions and Emergency Response, U.S. Environmental Protection Agency, 26 West Martin Luther King Drive, Cincinnati, Ohio 45268, United States
2. U.S. Environmental Protection Agency, Region 9, Drinking Water Section, 75 Hawthorne Street, San Francisco, California 94105, United States
3. Aptim Federal Services, LLC, 1600 Gest Street, Cincinnati, Ohio 45204, United States