1. Environmental Health Sciences, Univ. of South Carolina, Columbia, SC 29208; presently at, Shealy Environmental, West Columbia, SC 2917.
2. Associate Chair and Professor, Dep. of Civil, Architectural and Environmental Engineering, Missouri Univ. of Science and Technology, Rolla, MO 65409-0030.
3. Associate Professor, Environmental and Forest Biology, SUNY College of Environmental Science and Forestry, Syracuse, NY 13210 (corresponding author).