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

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hydro -consolidation settlement, but the normal settlement that occurs from placing a building on top of soil would occur. The report includes preliminary development standards that are specific to the Project to ensure no significant impacts related to geologic unit/soil instability would occur. Thus, the Project would not result in any new or increased significant impacts related to geologic unit/soil instability beyond impacts already identified in the Certified EIR. Expansive Soil The Certified EIR concluded that future development under the Overlay Zone could be located on expansive soil. However, implementation of Mitigation Measure MM-OZ 4.5-2 would reduce this impact to a less -than -significant level. In compliance with Mitigation Measure MM-OZ 4.5-2, testing for expansive soils was conducted as part of the Supplemental Geotechnical Investigation Report prepared for the Project by LGC Valley, Inc., dated December 16, 2021 (refer to Attachment C). The report noted that some soils at the Project Site have high expansive potential. The report includes preliminary development standards that are specific to the Project to ensure that no significant impacts related to expansive soil would occur. Thus, the Project would not result in any new or increased significant impacts related to expansive beyond impacts already identified in the Certified EIR. Septic Tanks The Certified EIR concluded that new development would connect to the existing sewer system and would not use septic tanks. No impacts would occur. The Project would connect to the City's existing sewer system and would not require the use of septic tanks or alternative wastewater disposal systems. Thus, the Project would not result in any new or increased significant impacts related to expansive soils beyond impacts already identified in the Certified EIR. Paleontological Resources The Certified EIR concluded that implementation of the Overlay Zone has the potential to directly or indirectly destroy a unique paleontological resource or site, or unique geologic feature, and this impact would be less than significant with implementation of Mitigation Measure MM-OZ 4.4-4. The Project would include excavation beyond 10 feet below ground surface and would be required to implement Mitigation Measure MM-OZ 4.4-4 from the Certified EIR, requiring certain actions in the event that a potential resource is encountered during Project construction. Thus, the Project would not result in any new or increased significant impacts related to paleontological resources beyond impacts already identified in the Certified EIR. 4.7.3 Any substantial changes in circumstances involving new significant impacts or substantial increase in the severity of significant impacts that will require major revisions of the Certified EIR? No substantial changes in the circumstances related to geology and soils have occurred and no areas that are susceptible to geology and soil impacts have been identified within the vicinity of the Project Site since the certification of the Certified EIR that would result in new or more severe significant environmental impacts. Cabrillo Town Center City of Santa Ana Technical Memorandum August 2023 City Council 18 — 539 10/3/2023