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<br /> SCE Santa Ana <br /> October 25,2019 <br />Project No. 3.31634 <br /> Page 8 <br /> <br /> <br />14. CONCLUSIONS <br /> <br />Based upon the results of this study, it is our opinion that geologic hazards at the site area <br />are nominal and any future construction within, is feasible from a geologic and <br />geotechnical standpoint. The following more explicitly summarize our findings. <br /> <br /> The site is underlain by shallow granular fill underlain by alluvium predominantly <br />consisting of silts and lean clays. Near surface soils will require earthwork removals <br />and re-compaction for the planned structural improvements. <br /> <br /> Seismic hazards at the site may be caused by ground shaking during seismic events <br />on regional active faults. <br /> <br /> Groundwater was not encountered in either the augured borings or the CPT borings <br />performed for this investigation. A review of California Department of Water <br />Resources Groundwater Level records for water wells near to the site, indicates <br />that water levels are greater than 40-feet below the surface. Foundations are <br />expected to be relatively shallow and therefore not interact with groundwater. <br /> <br /> The site is located in a mapped seismic hazard zone for liquefaction. However, the <br />potential for liquefaction to occur is considered very low, given the lack of a static <br />or perched water table (See Section 6.2) and the nature of soils on-site, <br />predominantly clay and silt. <br /> <br /> Site soils encountered during our field investigation generally consist of shallow <br />granular fills overlying alluvium consisting pof medium stiff to stiff layers of silts <br />and clays with minor interbeds of sands with varying amounts of silt. <br /> <br /> The subject site is situated on relatively flat terrain underlain by approximately 2- <br />feet of relatively loose soils considered unsuitable for the support of new structural <br />loads. These soils should be over-excavated and compacted in all structural areas. <br /> <br /> The depth of the unsuitable soils is based upon the areas observed during the field <br />investigation. It should be anticipated that the overall depth of the unsuitable <br />materials exposed during construction may vary from that encountered in the test <br />pits. Reasonably continuous construction observation and review during site <br />grading and foundation installation allows for evaluation of the actual soil <br />conditions and the ability to provide appropriate revisions where required during <br />construction. <br /> <br /> Excavations at the site will be achievable using standard earthmoving equipment. <br /> <br /> <br />53 of 100 <br />1327 S Grand Ave <br />12/12/2024