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9.5.1 Historical Resources Threshold: Would the Project cause a substantial adverse change in the significance of a historical resource as defined in Section 15064.5 of the CEQA Guidelines? Finding: Less than significant impact. (DEIR, p. 4.4-9 through 4.4-15) Facts in Support of Finding: As described in DEIR Section 4.4, Cultural/Historic Resources, the Project would not impact any historic resources. The DEIR describes the viewsheds of the properties listed on the Santa Ana Register of Historic Properties near the Project site as already significantly affected by urban and modern structures that are taller than the Project's tallest structure, the proposed 8-level above ground parking structure. As a result, the setting has changed and no longer provides an aesthetic sense of a particular period of history. The Historic Review, referenced in the DEIR, also describes that tall trees throughout Park Santiago screen views toward the Project site, and that many of the Santa Ana Register of Historic Properties in Park Santiago are not within the viewshed of the Project site. Overall, as detailed in the Historic Review referenced in the DEIR, due to the existing built environment, location of the Santa Ana Register of Historic Properties, and the existing viewsheds, the integrity of the historic setting and feeling aspects of properties in Park Santiago would not be reduced by construction of the proposed Project. Accordingly, a reduction in the historic significance of the properties would not occur from implementation of the Project. (DEIR, p. 4.4-9 through 4.4-15) Due to the reduced height and scale of the Modified Project, the existing built environment, and location of the Santa Ana Register of Historic Properties, the integrity of the historic setting and feeling aspects of properties in Park Santiago would not be reduced by implementation of the Modified Project. Thus, consistent with the Original Project, the Modified Project would not result in a reduction in the historic significance of properties. Based on the foregoing, none of the conditions identified in CEQA Guidelines Section 15088.5 that would trigger the need to prepare a recirculated EIR or other environmental document exist. The Modified Project would not result in either a new significant environmental impact or a substantial increase in the severity of a previously identified impact. (Final EIR, Clarifications to the Final EIR, Section 3.4.) 9.5.2 Archaeological Resources Threshold: Would the Project cause a substantial adverse change in the significance of an archaeological resource pursuant to Section 15064.5 of the CEQA Guidelines? Finding: Less than significant impact. (DEIR, p. 2-5; Initial Study, pp. 26-27.) Facts in Support of Finding: The Project site has been disturbed various times for different uses and developments. This includes excavation to depths for installation and removal of the previous gas station tanks, and septic tanks, and utility lines from previous developments in the southern portion of the site. In addition, the Property Condition Report referenced in the Initial Study describes that the foundation of the existing building in the northern portion of the site is developed on a 4-inch thick concrete slab on top of 24-inch diameter, 20-36-foot-deep piles. Thus, previous excavation in the area of the existing building reaches 20-36 feet deep, and excavation in other areas of the site were deep enough to provide for utilities, septic tanks, and gasoline tanks. Also, as described in the Geotechnical Engineering Investigation prepared for the site (referenced in the Initial Study), up to 5.5 feet of fill soils were observed in soil borings. Due Resolution No. Page 29 of 76 Certification of the Magnolia at the Park EIR