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Community Plan Exemption Checklist <br />City of Santa Ana Gary Avenue Business Park Project <br />and permitting process. Therefore, the Project would result in no new impacts on people or structures due to <br />strong seismic ground shaking. <br />iii. Seismic -related ground failure, including liquefaction? <br />No New Impact. The Preliminary Geotechnical Investigation (Appendix E) describes that the Project site is <br />mapped as being located within a liquefaction zone; however, the liquefaction hazard is very low due to <br />limited settlement potential and the general discontinuity of weaker soil layers across the site. The Preliminary <br />Geotechnical Investigation provides CBC seismic design criteria that are specific to the onsite soils and the <br />potential liquefaction and settlement. Compliance with the CBC would require proper construction of building <br />footings and foundations so that it would withstand the effects of potential ground movement, including <br />liquefaction. <br />Development of the proposed Project would be required to conform to the seismic design parameters of the <br />CBC, which are reviewed by the City for as part of the building plan check and development review process. <br />Compliance with the requirements of the CBC and City's municipal code for structural safety would provide <br />that no new hazards from seismic -related ground failure, including liquefaction would occur. <br />iv. Landslides? <br />No New Impact. The Project site is topographically flat and is not near a hill or other area that could be <br />vulnerable to landslides. Therefore, the Project would result in no new impacts on people or structures due <br />to landslides. <br />b) Result in soil erosion or the loss of topsoil? <br />No New Impact. The Project site is flat and does not contain sloped conditions that would result in conditions <br />outside of those evaluated under the GPU EIR. The Project would demolish the existing three buildings, <br />landscaping, and pavement, and construct a new approximately 91,500 square foot industrial building. <br />During construction activities, soil would be exposed and there would be an increase in potential for soil <br />erosion compared to existing conditions. Development greater than one acre in size is required to comply <br />with the provisions of the Construction General Permit (CGP) adopted by the State Water Resources Control <br />Board (SWRCB), which includes implementation of standard erosion control practices as required by a <br />Stormwater Pollution Prevention Plan (SWPPP). The Project site is fully developed, and proposed <br />development would not substantially change imperviousness of the site, resulting in impacts to stormwater <br />runoff velocity or volume. Therefore, the Project would result in no new impacts in soil erosion or the loss of <br />topsoil. <br />c) Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of <br />the project, and potentially result in on- or offsite landslide, lateral spreading, subsidence, liquefaction <br />or collapse? <br />No New Impact. As discussed above, the Project site is not located within an area that is subject to landslides, <br />and impacts related to landslides would not occur. Also, as described previously, the liquefaction hazard is <br />very low due to limited settlement potential and the general discontinuity of weaker soil layers across the <br />site. Thus, the potential for lateral spreading would also be limited, Compliance with the requirements of the <br />CBC and City's municipal code for structural safety would provide that no new hazards related unstable <br />geologic units or soils would occur. Appropriate design required by the CBC is reviewed by the City as part <br />of the building plan check and development review process. Therefore, the Project would result in no new <br />impacts in on- or offsite landslide, lateral spreading, subsidence, liquefaction, or collapse. <br />56 <br />