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St. Barbara Catholic School <br />Project No.: D-6289-01 <br />been utilized for Dynamic Conterminous U.S. 2014 (update) (v.4.2.2) <br />acceleration. <br />Peak Horizontal Ground Acceleration for 10% probability of <br />exceedance in 50 years i.e., return period of 475 years <br />Peak Horizontal Ground Acceleration for 5% probability of <br />exceedance in 50 years i.e., return period of 975 years <br />Peak Horizontal Ground Acceleration for 2% probability of <br />exceedance in 50 years i.e., return period of 2,475 years <br />CITY OF SANTA ANA <br />Planning and Building Agency <br />may, lS. <br />Approved <br />FOR PERMIT ISSUANCE <br />0.3810g <br />0.4892g <br />0.6577g <br />Interactive Hazard Curve and Uniform Hazard Response Spectrum have been plotted <br />and presented in Appendix B. <br />In addition to possible strong earthquake ground motion at the site, the secondary effects <br />of earthquake -induced liquefaction, and earthquake -induced landsliding, were <br />considered. Guidelines for evaluating and mitigation seismic hazards in California (CGS, <br />2008, SP-117A) summarize procedures for evaluating the earthquake -induced landslide <br />and liquefaction potential. <br />Earthquake Induced Liquefaction: The site is within a zone mapped as requiring <br />evaluation of earthquake -induced liquefaction potential per CGS SP-117A, 2008 (CGS, <br />zones of required investigation and Newport Beach Quadrangle, released April 17, 1997). <br />Liquefaction is discussed in more detail in the proceeding sections. <br />Induced Flooding: The project site does not lie within the flood zone area, and we <br />believe that site inundation should not be considered a potential hazard to the project. <br />Tsunamis are seismic sea waves generated predominantly by vertical displacement of the <br />ocean floor during an earthquake. Due to the inland location of the site, tsunamis do not <br />pose a seismic risk hazard to the site. <br />8 <br />