1. Senior Geotechnical Engineer, Professional Service Industries, Inc. (PSI), 2930 Eskridge Road, Fairfax, VA 22031, US (Corresponding author), e-mail: behzad.faryar@psiusa.com
2. Chief Engineer, Professional Service Industries, Inc., 205 South Battlefield Boulevard, Suite 100 Chesapeake, VA 23322, US.
3. Principal Engineer, Professional Service Industries, Inc., 5021 West W.T. Harris Boulevard, Charlotte, NC 28269, US.