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b) Result in substantial soil erosion or loss of topsoil? Less Than Significant Impact. The City <br />would require the grading and construction contractor to install and maintain all applicable City required <br />short-term construction soil erosion control measures to reduce and minimize soil erosion impacts <br />throughout project grading and construction. The contractor would be required to submit a Storm <br />Water Pollution Prevention Plan (SWPPP) to identify all Best Management Practices (BMPs) that would <br />be incorporated into the project prior to the start of grading and maintained to completion of all <br />construction activities to reduce and minimize soil erosion. The City has standard soil erosion <br />protection measures that the contractor would be required to install and maintain throughout grading <br />and construction to minimize off -site soil erosion. The requirement by the City for the contractor to <br />install all applicable mandated soil erosion control measures into the project prior to the start of <br />construction and throughout project construction would minimize and reduce potential soil erosion <br />impacts to less than significant. <br />c) Be located on a geologic unit or soil that is unstable, or that would become unstable as a result <br />of the project, and potentially result in on- or off -site landslide, lateral spreading, subsidence, <br />liquefaction or collapse? Less Than Significant Impact. There are no known unstable geologic or <br />soil conditions either on or adjacent to the site that would impact the project, other than liquefaction that <br />is discussed in section "Vl.a.iii)" above. The incorporation of recommended measures in the soils <br />report by the City Engineer to protect the project from liquefaction would reduce potential liquefaction <br />impacts to less than significant. The project would not be impacted by unstable soil conditions. <br />d) Be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code (1994), <br />creating substantial direct or indirect risks to life or property? Less Than Significant Impact. <br />Based on the geotechnical report that was prepared for the site the near surface on -site soils consist of <br />moderately to highly expansive clay that has the potential for damage to site improvements due to <br />heaving of the underlying soils.20 The geotechnical report recommends measures for incorporation into <br />the design and construction of the project to reduce potential expansive soil impacts. The City <br />Engineer would, based on the geotechnical report, recommend measures for incorporation into the <br />design and construction of the project to reduce expansive soil impacts. The incorporation of mitigation <br />measures recommended by the City Engineer to protect the project from expansive soil impacts on <br />would reduce impacts to less than significant. <br />e) Have soils incapable of adequately supporting the use of septic tanks or alternative wastewater <br />disposal systems where sewers are not available for the disposal of waste water? No Impact. <br />The project site is served by an existing underground public sewer system. The City would require the <br />project to connect to and be served by the existing Santa Ana public sewer system that presently <br />serves the site and not allow the project to use septic tanks for on -site wastewater disposal. The <br />project would not have any septic tank or alternative wastewater disposal impacts. <br />f) Directly or indirectly destroy a unique paleontological resource or site or unique geologic <br />feature? Less Than Significant Impact. The Santa Ana General Plan does not identify the presence <br />of any paleontological resources in the city. The project site was disturbed in the past during <br />construction of the existing church, church parking lot and other site improvements. Because the site <br />has been disturbed and paleontological resources are not known to exist in Santa Ana, it is unlikely that <br />paleontological resources would be uncovered during project construction. Potential paleontological <br />impacts by the project would be less than significant. <br />20 Geotechnical Engineering Evaluation Report, Sunflower Apartments, 651 Sunflower Avenue, Santa Ana, California, Twining, April 30, <br />2018, page 7. <br />Legacy Sunflower Apartments Page S2 <br />Mitigated Negative Declaration — March 14, 2019 <br />