1. ARCADIS Geraghty & Miller, Inc., Durham, NC 27713
2. Current address: Babcock & Wilcox Research Center, 1562 Beeson Street, Alliance, OH 44601
3. U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Air Pollution Prevention and Control Division, Research Triangle Park, NC 27711.
4. U.S. Environmental Protection Agency, Office of Research and Development, National Risk Management Research Laboratory, Air Pollution Prevention and Control Division, Research Triangle Park, NC 27711