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3.5 Cultural Resources <br />Any Substantial <br />Any Substantially <br />Changes <br />Changed <br />Involving New <br />Circumstances <br />Significant <br />Involving New <br />Impacts or <br />Significant Impact <br />Any New <br />Project <br />Impact <br />Substantially <br />or Substantially <br />Information of <br />Incorporates <br />Issues (and supporting <br />Determination <br />More Severe <br />More Severe <br />Substantial <br />Mitigation <br />Information Sources) <br />in EIR <br />Impacts? <br />Impacts? <br />Importance? <br />Measure(s)? <br />CULTURAL RESOURCES: Would the <br />project: <br />(a) Cause a substantial adverse <br />Less Than <br />change in the significance of a <br />Significant With <br />No <br />No <br />No <br />Yes <br />historical resource pursuant to <br />Mitigation <br />CEQA Guidelines §15064.5? <br />(b) Cause a substantial adverse <br />change in the significance of <br />Less Than <br />an archaeological resource <br />Significant With <br />No <br />No <br />No <br />Yes <br />pursuant to CEQA Guidelines <br />Mitigation <br />§15064.5? <br />(c) Disturb any human remains, <br />Less Than <br />including those interred <br />Significant With <br />No <br />No <br />No <br />Yes <br />outside of formal cemeteries? <br />Mitigation <br />4.5.1 Impact Determination in the EIR <br />Historic Resources <br />The Certified EIR stated that there are no documented significant historical resources (i.e., <br />buildings, structures, landmarks, or historic districts) within the Overlay Zone, although five <br />historically significant structures occur within '/2-mile of the Overlay Zone boundaries. Therefore, <br />impacts to existing formally- documented historic resources would be less than significant, as no <br />direct impacts would occur to any historic structures. Potential indirect impacts could occur to <br />those structures located outside of the Overlay Zone in the form of shade/shadow impacts. Refer <br />to Section 4.1 for a description of shade/shadow impacts. <br />However, it is expected that multiple structures within the Overlay Zone are currently 50+ years <br />of age or will be 50+ years of age in the future when actual redevelopment projects may be <br />proposed. As such, redevelopment of sites within the Overlay Zone could result in the demolition <br />or major modification of historically -aged structures which have not yet been evaluated to <br />determine their cultural and/or architectural significance. Because of the site -specific nature of the <br />historically -aged structures in relation to potential (not yet defined) future redevelopment, it is <br />difficult to determine if actual adverse impacts will occur. Such impacts can only be determined <br />once project sites have been chosen, development projects are designed, and affected 50+ year - <br />old structures in the vicinity of the Overlay Zone footprints are formally evaluated to determine <br />their cultural significance. <br />If it is determined in the future that any existing historically -aged (50+ years old) structures in the <br />Overlay Zone have cultural significance, and proposed future development would ultimately affect <br />Cabrillo Town Center City of Santa Ana <br />Technical Memorandum August 2023 <br />City Council 18 — 523 10/3/2023 <br />