1. Senior Engineer, Marshall Miller and Associates, Inc., 5825 Triangle Dr., Raleigh, NC 27617. E-mail: david.schaad@mma1.com
2. Principal, Natural Systems Engineering, P.C., 3719 Benson Dr., Raleigh, NC 27609. E-mail: jhalley@nsepc.com
3. Environmental Engineer, Camp, Dresser, and McKee, 301 S. McDowell St., Ste. 512, Charlotte, NC 28211. E-mail: wilsonsa@cdm.com