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W[.AN`G F crl COMMUIVfTY PARK DESICsN,'DEVECOPi LENT 4ND ,CONSTRUCTION DOCUMENTS . and Ap Project Understanding and Approach As indicated in our Statement of Qualifications, LGC Valley's approach to 2045 Royal Avenue the site is the following: Suite 125 ► Assess the ancient landslide mass in order to determine its Simi Valley, CaIifomia 93065 characteristics and supplement the working hypothesis concerning the orientation and geologic structure of the bedrock at depth. ► Determine if more than one weals plane exists in the soil column that may affect the proposed development in light of the interpreted structural conditions. ► Determine the strength of the various soil types in the rock column to verify or modify the previous assumptions. In addition and as previously stated, we will review our findings carefully relative to the proposed design. Understanding the interplay between the geologic structure, the physical characteristics of the site's soils, and the influence of groundwater and its controlling factors to the site design will determine the geotechnical mitigation options available for site construction and project development. The ultimate goal of our geotechnical recommendations/options is to help maintain (from a geotechnical point of view) that the final design of the Lang Ranch Park can be as close as possible to the original approved Master Plan Design. Based on our visual assessment of the site along with our review of numerous reports prepared by others for the surrounding areas, it is anticipated that no additional significant changes to the main landslide mass will result from our studies. That is, we do not -anticipate that we will determine the basal rupture surface from our work. This is because the previous data of the area. as reviewed by us does not have a consensus as- to the base of the ancient landslide or its direction of movement. In addition, we are confined by the limits of the site because the ancient landslide continues far off-site; we cannot explore everywhere we may wish to explore. Further and most importantly, all previous reports we have reviewed indicate stable conditions will remain at the site unless significant changes to the groundwater regime occurs. In essence, it does not seem feasible or worthwhile that our work should attempt to solve this deep- seated puzzle because we are confined by the limits of the site, the limits of the available data and in the end, it likely will have no significant effect to the stability of the ancient landslide mass. However, we do anticipate that our proposed investigation will lead to a greater knowledge of the internal rotation of blocks within the landslide mass and the general conveyance of groundwater at the site, because this will be our primary goal. Understanding the make-up of the pieces of the P S O M A S Project Understanding and Scope I !_GC Geotechnical - 5