1. Department of Environmental Engineering and Science, Clemson University, 342 Computer Center, Anderson, SC 29625-6510
2. Water Quality Standards Branch, Metropolitan Water District of Southern California, 700 Moreno Avenue, La Verne, CA 91750-3303
3. Department of Civil and Environmental Engineering, Arizona State University, Tempe, AZ 85287-5306
4. Department of Environmental Engineering, Pennsylvania State University at Harrisburg, Middletown, PA 17057