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Community Plan Exemption Checklist <br />City of Santa Ana Gary Avenue Business Park Project <br />Summary of Impacts Identified in the GPU EIR <br />The Final Recirculated GPU EIR addressed energy impacts on pages 5.6-20 through 5.6-24. The GPU EIR <br />discussed that the location and underlying geology of the City make it likely to experience seismic hazards, <br />including strong seismic ground shaking, and secondary hazards, like liquefaction. No active surface faults <br />are mapped and zoned under the AP Zoning Act in the City and all structures that would be constructed in <br />accordance with the GPU would be designed to meet or exceed current design standards as found in the <br />latest CBC. Most of the City area is within an area susceptible to liquefaction; however, all structures <br />constructed under the GPU would be designed in accordance with current seismic design standards as found <br />in the CBC. There are no substantial hazards with respect to slope stability, as the City is mostly flat. Unstable <br />geologic unit or soils conditions, including soil erosion, could result from development of the GPU. Mandatory <br />compliance with existing regulations, including the preparation and submittal of a SWPPP and a soil <br />engineering evaluation, would reduce soil erosion impacts to a less than significant level. Implementation of <br />the CBC design code, which has been adopted by the City and requires that structures be designed to <br />mitigate expansive and compressible soils, would reduce impacts to a less than significant level. The EIR <br />determined that the probability of subsidence impacts is generally low in the majority of Santa Ana; <br />however, the statutorily required sustainable groundwater management practices of the Orange County <br />Water District would ensure that impacts would be less than significant. Also, the EIR determined that future <br />development in the City would require connection to the City's sewer system as the City of Santa Ana does <br />not allow for the installation of septic tanks. <br />The GPU EIR described that grading and construction activities of undeveloped areas or redevelopment that <br />requires more intensive soil excavation than in the past could potentially disturb paleontological resources. <br />Therefore, the GPU EIR included Mitigation Measures GEO-1 through GEO-3 prescribe requirements for <br />monitoring based on the sensitivity of sites for paleontological resources. Under GEO-1, areas that range <br />from high to low sensitivity are required to prepare a Paleontological Resources Monitoring and Mitigation <br />Plan. With adherence to Mitigation Measures GEO-1 through GEO-3, impacts to paleontological resources <br />would be less than significant. <br />Impacts Associated with the Proposed Project <br />a) Expose people or structures to potential substantial adverse effects, including the risk <br />of loss, injury, or death involving: <br />i. Rupture of a known earthquake fault, as delineated on the most recent Alquist- <br />Priolo Earthquake Fault Zoning Map issued by the State Geologist for the area <br />or based on other substantial evidence of a known fault? <br />No New Impact. The Project site is not within an Alquist Priolo fault zone and is not in an area where <br />structures are at significant risk from fault rupture. The closest published active fault to the site is the San <br />Joaquin Hills Fault, approximately 2 miles from the Project site. Other active faults in the vicinity of the site <br />include the onshore extension of the Newport -Inglewood Fault Zone, approximately 5 miles southwest of the <br />site, the Palos Verdes Fault, approximately 25 miles to the west, the Elsinore Fault, approximately 17 miles <br />to the north. Therefore, the Project would result in no new impacts on people or structures due to rupture of <br />an earthquake fault in the Alquist Priolo fault zone. <br />ii. Strong seismic ground shaking? <br />No New Impact. As discussed previously, there are a number of potentially active and active fault systems <br />located near the Project site. As required by California Building Code (CBC) Chapter 16 for the construction <br />of new buildings or structures, specific engineering design and construction measures would be implemented <br />to anticipate and avoid the potential for adverse impacts to human life and property caused by seismically <br />induced ground shaking. Compliance with CBC Chapter 16 would be verified through the City's plan check <br />55 <br />