1. Vice President of Research, Development and Technical Sales, Phoenix Services LLC, 148 W. State St., Suite 301, Kennett Square, PA 19348.
2. Tailings Manager, Kinross Gold Corporation, 5370 Kietzke Ln. #102, Reno, NV 89511.
3. Principal Professor, Escuela Superior Politécnica del Litoral, Facultad de Ciencias Naturales y Matemáticas, Campus Gustavo Galindo Km 30.5 Via Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador.
4. Masters Student, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Colorado, UCB 428, Boulder, CO 80309.
5. Associate Professor, Dept. of Environmental Engineering, Çukurova Univ., Balcali, Adana 01380, Turkey.
6. Professor, Dept. of Civil, Environmental and Architectural Engineering, Univ. of Colorado, UCB 428, Boulder, CO 80309 (corresponding author).