mapped several large landslide deposits along the north-facing slopes to the north and east of the site area in the Franciscan mélange terrain, which is considered to be highly susceptible to landslide activities and slopes underlain by Franciscan mélange have a high potential for failure. The CGS (2002b) showed the entire area of the adjacent ravine (swale) to the west and the upper portion of the subject landslide area (immediately downslope of Road A) to be within the limits of zones of required investigation associated with earthquake-induced landslides where “Areas where previous occurrence of landslide movement, or local topographic, geological, geotechnical, and subsurface water conditions indicate a potential for permanent ground displacement such that mitigation as defined in Public Resources Code Section 2693(c) is required”.