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SANTA ANA CLIMATE ACTION PLAN INITIAL STUDY CITY OF SANTA ANA generally considered to be a hazard where the groundwater is less than 20 feet in depth. Where soil drainage is good, the pore pressure, which builds up when ground motion shakes unconsolidated soil, would be more easily dissipated; thus, soils with good drainage are less likely to liquefy. The City of Santa Ana contains areas located within a State - designated liquefiable area.24,25,2e,27 Additionally, according to Exhibit 5 of the City of Santa Ana General Plan Seismic Safety Element, the potential for liquefaction hazards ranges from very low in the northeastern portion of the City to very high in the southwestern portion. The Draft CAP does not require development of individual land use projects that would not otherwise occur. However, any developments that would occur within the City consistent with the goals of the Draft CAP would be designed and constructed in compliance with the latest version of the CBC and other applicable federal, state, and local codes relative to liquefaction criteria. Compliance with existing regulations would ensure a less than significant impact to seismic - related ground failure, including liquefaction. iv) Landslides? No impact. Landslides occur when sloped ground becomes unstable and falls downward. The City is relatively flat; therefore, the potential for landslides to occur within the City is low. Future development as a result of implementation of the Draft CAP would comply with applicable CBC standards. No impacts involving exposure of people or structures to adverse effect related to landslides would occur. b) Result in substantial soil erosion or the loss of topsoil? Less than Significant Impact. No future project resulting from implementation of the Draft CAP would directly involve substantial loss of topsoil or directly result in substantial soil erosion. In the event that new development or construction of expanded bike paths and pedestrian amenities would require construction activity that may result in substantial soil erosion or loss of topsoil, such activities would be subject to the latest version of the CBC and the National Pollutant Discharge Elimination System (NPDES) to reduce erosion impacts. In addition, while the Santa Ana River is completely channelized within the City, Santiago Creek is not and therefore erosions hazards can be found near Santiago Creek.28 However, any development near the creels would comply with the CBC and NPDES. The impact would be less than significant. 224 California Department of Conservation Division of Mines and Geology. Seismic Hazard Zones Map — Newport Beach Quadrangle. April 17, 1997. Available online at: httl2:/ /gmw.consiv.co.gov /shmp/dowiiload /quad /NEWPORT BEACH /maps /ozn newb.pdf accessed August 28, 2015. 25 California Department of Conservation Division of Mines and Geology. Seismic Hazard Zones Map — Anaheim Quadrangle. April 15, 1998. Available online at: htq): / /gmw.consrv.ca.gov /shmp/ download /quad /ANAHEIM /maps /ozn anah.pddf, accessed August 28,2015. 96 California Department of Conservation Division of Mines and Geology. Seismic Hazard Zones Map — Orange Quadrangle. April 15, 1998. Available online at: ht mw.con.srv.ca.gov/ shmp /download /quad /ORANGE /maps /ozn ompdf accessed August 28,2015. 27 California Department of Conservation Division of Mines and Geology. Seismic Hazard Zones Map — Tustin Quadrangle. January 17, 2001. Available online at: http: / /gxnw.consrv.ca.gov /shmp /download /quad /TUSTINI maps /ozn rus.pddf, accessed August 28,2015, 28 City of Santa Ana Planning Division. City of Santa Ana General Plan Land Use Element p. A -40. Available online at: htip: / /www.ci Santa -ana ca.us /genera]plan /documents /LandUseElement;,pdf, accessed September 1, 2015. October 2015 Page 31 75B -129