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5.0 SEISMIC HAZARDS <br />5.1 Liquefaction Potential <br />Liquefaction is the transformation of a granular material from a solid to a liquid state as a result <br />of as flow land sliding, lateral spread, loss of bearing capacity, or settlement. <br />Based on the Seismic Hazard Zones Map, Anaheim and Newport Beach Quadrangle, the site <br />is not located within a potential liquefaction zone. Therefore, liquefaction may not occur at the <br />site. <br />The city of Santa Ana has allowed many new one to two-story houses supported by regular <br />footings with slab on grade to be constructed in residential areas where the surface and <br />subsurface are similar to the subjected site. <br />5.2 Lurching <br />Soil lurching refers to the rolling motion on the surface due to the passage of seismic surface <br />waves. Effects of this nature are not considered significant on the subject site where the <br />thickness of alluvium does not vary appreciably under structures. <br />5.3 Surface Rupture <br />Surface rupture is a break in the ground surface during or as a consequence of seismic activity. <br />The potential for surface rupture on the subject site is considered negligible due to the absence <br />of known active faults at the site. <br />5.4 Ground Shaking <br />Throughout southern California, ground shaking, as a result of earthquakes, is a constant <br />potential hazard. The relative potential for damage from this hazard is a function of the type <br />and magnitude of earthquake events and the distance of the subject site from the event. <br />Accordingly, proposed structures should be designed and constructed in accordance with <br />applicable portions of the building code. <br />Page 6