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Geotechnical Investigation Report 03/11/2025 <br />2234 S Lowell St., Santa Ana, CA 92707 Page | 6 <br /> <br />SEISMIC DESIGN INFORMATION <br />Earthquake Response Spectral Parameters <br /> <br />ASCE Hazard Tool (ASCE/SEI 7-16) was used to provide the maximum earthquake design <br />parameters for the project site (Latitude 33.716704°, Longitude -117.879032°) as listed in Table- <br />2. <br /> <br />Table 2– Maximum Considered Earthquake Response Spectral Parameters <br />PGAm SS S1 SMS SM1 SDS SD1 <br />0.656 1.285 0.46 1.542 N/A 1.028 N/A <br />Appendix II presents the site’s seismic report. <br />SITE SOIL PROFILE <br />According to the California Building Code, the site’s soil profile type is classified as class D. <br />LIQUEFACTION <br />Based on the CGS Earthquake Zones of Required Investigation Map, all or portion of this parcel <br />lies within a liquefaction zone. A significant seismic event may trigger a liquefaction hazard in <br />loose and medium dense cohesionless soils located under groundwater level. Since the depth <br />of groundwater at this site exceeds 50 feet (the limit for liquefaction effect), even if there are <br />loose or medium dense cohesionless soils below the depth of 50 feet, the liquefaction hazard <br />doesn’t propagate to the ground surface and there will be no impact on the structures. <br />SURFACE FAULT RUPTURE <br />The project site is not located within an Alquist-Priolo earthquake fault zone as established by <br />the California Geologic Survey, nor is it located within 1000 feet from any Holocene or younger <br />aged faults. Therefore, this site is not susceptible to surface fault rupture hazard, refer to Figure- <br />4.