Item 18 - Appeal Application Nos. 2023-02 and 2023-03 for Cabrillo Town Center project

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Expansive Soil The Certified EIR stated that the Overlay Zone is greater than 200 acres in size, and as such, does not contain uniform soil types throughout the Overlay Zone area. In addition, because implementation of the Overlay Zone does not identify specific development projects within the Overlay Zone, it would be inconclusive to classify the entire Overlay Zone as having a particular expansive soil potential because different soil types have varying degrees of expansion potential. Consequently, additional tests should be conducted at each future project site to determine the expansion potential of the near surface materials that may influence the structural elements of the projects. Final design recommendations should be based on the results of those tests. It was determined that with implementation of Mitigation Measure MM-OZ 4.5-2, appropriate construction standards will ensure that impact of expansive soils on future development will be less than significant. Septic Tanks The Certified EIR stated that the City is almost entirely built out with established utility services and new development would not require the use of septic tanks. For this reason, it was determined that there will be no impact related to the capacity of soils to support septic tanks or other alternative wastewater disposal systems. Paleontological Resources The Certified EIR stated that the Overlay Zone area is not known to contain documented paleontological resources. Plant and animal fossils are typically found within sedimentary rock deposits. Given the geology of the Overlay Zone area, it is unlikely that unknown paleontological resources would exist within the Overlay Zone. In addition, the Overlay Zone area has already been subject to extensive ground disturbance and development. Any superficial paleontological resources that could have existed at one time have likely been previously unearthed by past development activities. While not anticipated, the remote potential remains for intact paleontological resources to exist at deep levels. It was determined that implementation of Mitigation Measure MM-OZ 4.4-4 will reduce any potential impacts to less -than -significant levels. Mitigation Measures MM-OZ 4.5-1 During project -specific building design of future development in the Overlay Zone, site -specific geotechnical studies shall be conducted under the direct supervision of a California Registered Engineering Geologist or licensed geotechnical engineer to assess detailed seismic, geological, soil, and groundwater conditions at each construction site and develop recommendations to prevent or abate any identified hazards. The report shall specify foundation recommendations to ensure issues associated with underlying soils are addressed. Construction of the project shall comply with all recommendations in the geotechnical report. The study shall follow Cabrillo Town Center City of Santa Ana Technical Memorandum August 2023 City Council 18 — 536 10/3/2023