1. Graduate Student Researcher, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA 95616 (corresponding author).
2. Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA 95616.
3. Staff Geotechnical Engineer, GeoEngineers, Inc., 17425 NE Union Hill Rd., Suite 250, Redmond, WA 98052.