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

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Storm Water Drainage The Certified EIR stated that adherence to Mitigation Measure MM-OZ 4.7-1 would require the preparation of a WQMP and implementation of appropriate BMPs, which could incorporate stormwater detention facilities, and would reduce the volume of runoff generated (and potential for flooding) in the Overlay Zone. However, because the existing capacity of the existing storm drain system in the Overlay Zone is unknown, this is considered a potentially significant impact. Implementation of Mitigation Measure MM-OZ 4.7-2 would be required to address these issues. Water Supply The Certified EIR stated that domestic water for the Overlay Zone is supplied by both groundwater and imported surface water sources, as discussed above. A majority of water supplied to the Overlay Zone is supplied by groundwater from the Basin. Specifically, approximately 69 percent of the water supplied by the City's service area is supplied by groundwater from the Basin, and the remaining 31 percent of water supply is provided by MWD. Implementation of the proposed General Plan Update would increase the population and amount of development within the City, which in turn would increase the demand for water supplies. The Overlay Zone would allow a maximum of 6,661,489 square feet of residential, 3,410,507 square feet of office space and 1,275,440 square feet of commercial space at completion. A Water Supply Assessment was done by Dudek to assess the water demand and supply conditions for the Overlay Zone area. According to the WSA provided as Appendix I to the Certified EIR, analysis of water supply projections for the City demonstrates that projected supplies will exceed demand through the year 2030. These projections consider land use based on the Metro East Mixed -Use Zone development intensities; projections from the City's 2005 UWMP; water development programs and projects; and water conservation. Analysis shows that groundwater and imported water are anticipated to remain stable to the City, based on studies and reports of the Orange County Water District (OCWD) and the Metropolitan Water District of Southern California (Metropolitan), respectively. The 20-year projection, and beyond, of water demand will be met by approximately 70 percent groundwater, based on an expected long-term Basin Production Percentage (BPP), and 30 percent imported water confirmed reliable by Metropolitan. Additionally, analysis of normal, single -dry, and multiple -dry year scenarios also demonstrate the City's ability to meet or exceed demand during the 20-year planning period, even under reduced imported water supply conditions. Additionally, the City has the opportunity to increase supply to meet demand, if extraordinary circumstances require, through the following measures: 1) production of groundwater above the BPP up to the basin safe yield; 2) increasing imported water purchases; and 3) increased water conservation measures. Reliability of future water supplies to the region will be ensured through continued implementation of the local agency programs, OCWD's Long - Term Facilities Plan, and the combined efforts and programs among member agencies of Metropolitan, such as the Integrated Resources Plan (IRP) and proposed Capital Improvement Program. Agencies include all water wholesalers and retailers, the Orange County Sanitation Cabrillo Town Center City of Santa Ana Technical Memorandum August 2023 City Council 18 — 640 10/3/2023