1. Department of Geological Sciences and Engineering; University of Missouri-Rolla; Rolla Missouri USA
2. U.S. EPA, ORD, NERL, ESD, CMB; Las Vegas Nevada USA
3. Department of Biological Sciences; Western Michigan University; Kalamazoo Michigan USA
4. Department of Geosciences; Western Michigan University; Kalamazoo Michigan USA
5. Département de Géologie et de Génie Géologique; Université Laval; Sainte-Foy, Québec Canada