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<br /> SCE Santa Ana <br /> October 25,2019 <br />Project No. 3.31634 <br /> Page 7 <br /> <br /> <br />10. EXPANSIVE SOILS <br /> <br />Expansive soils are soils that swell when subjected to moisture. Shrink/swell potential is <br />the relative change in volume to be expected with changes in moisture content; that is, the <br />extent to which the soil shrinks as it dries or swells when it gets wet. The extent of <br />shrinking and swelling is influenced by the amount and kind of clay in the soil. Shrinking <br />and swelling of soils causes’ damage to building foundations, roads, and other structures. <br />Soils in the immediate vicinity of the building site consist of silty fine to coarse sands <br />overlying lean clays and silts. Based on laboratory testing, there is a very low to low <br />shrink/swell potential at the site. <br /> <br />11. FLOOD HAZARDS <br /> <br />Based upon a review of the FEMA Flood Insurance Rate Map, 06059C0276J, effective <br />on12/03/2009; the site is located in Zone X - outside the 0.2% annual chance flood plain. <br /> <br />12. TSUNAMIS <br /> <br />Tsunamis are long wavelength seismic sea waves (long compared to the ocean depth) <br />generated by sudden movements of the ocean bottom during submarine earthquakes, <br />landslides, or volcanic activity. Based on a review of the Orange County, California Tsunami <br />Inundation Maps for Emergency Planning (2009), the site is not located within a tsunami <br />inundation area. <br /> <br />13. LANDSLIDES <br /> <br />Based on our review of published landslide hazard maps, geologic maps, and aerial <br />photographs, as well as our site reconnaissance, landslides or indications of deep-seated <br /> <br />slope instability was not observed at the project site. Further, the site area is generally flat <br />and there are no significant slopes in close proximity, nor are there any planned as part of <br />the proposed project. Landslides are therefore not a design consideration. <br /> <br /> <br /> <br />52 of 100 <br />1327 S Grand Ave <br />12/12/2024