1. Chief Engineer, Praad Geotechnical, 5465 S Centinela Ave., Los Angeles, CA 90066 (corresponding author).
2. Senior Engineer, Fugro West, 4820 McGrath St., Ventura, CA 93003.
3. Associate Professor, Dept. of Civil and Environmental Engineering, 5731 Boelter Hall, Univ. California at Los Angeles, Los Angeles, CA 90095-1593.
4. Principal Engineer, Praad Geotechnical, 5465 S. Centinela Ave., Los Angeles, CA 90066.