1. GeoSyntec Consultants, 621 N.W. 53rd Street, Suite 650, Boca Raton, Florida 33487, USA, Telephone: 1/561-995-0900, Telefax: 1/561-995-0925,
2. Department of Civil, Environmental and Architectural Engineering, University of Colorado at Boulder, Campus Box 428, Boulder, Colorado 80309-0428, USA, Telephone: 1/303-492-4699, Telefax:1/303-492-7317,
3. Tenax Corp., 4800 E. Monument Street, Baltimore, Maryland 21205, USA, Telephone: 1/410-522-7000, Telefax: 1/410-522-7015,