1. Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, Tennessee 37996-2010, Requimte/CQFB, Departamento de Quimica, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, Illinois State Geological Survey, 615 East Peabody Drive, Champaign, Illinois 61820, and Department of Civil and Environmental Engineering, University of Illinois, Urbana−Champaign, 205 North Mathews Avenue, Urbana, Illinois 61801