Item 28 - Public Hearing - ZOA No. 20204-01 South Coast Technology Center

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South Coast Technology Center Project CEQA Exemption 15183 4.18.4 Applicable GPU PEIR Regulatory Requirements/Mitigation Measures: Refer to Section 4.5, Cultural Resources, for RR CUL-1 and MM CUL-7. 4.19 Utilities and Service Systems 4.19.1 GPU PEIR Findings The GPU PEIR concluded that buildout of the General Plan Update would increase sewer flows and sewer upgrades may be needed to achieve optimal hydraulic capacity. However, the City's Sewer Master Plan and Capital Improvement Program process would adequately prioritize necessary projects as developments under the General Plan Update occur. Additionally, as described in the GPU EIR any project within the City and under the GPU that goes through the entitlement process would be required to perform a sewer monitoring study with submittal and review of the study by City staff. If the sewer system is found to be deficient, the developer would be required to upsize the portion of the sewer pipe within the frontage of their property in accordance with City standards and could pay for the upsize through agreements with the Orange County Sanitary District (OCSD). The GPU PEIR also concluded that OCSD wastewater treatment plants would have the capacity to accommodate the increased flows generated by the buildout of the General Plan Update. Additionally, the GPU PEIR states that that any sewer utility infrastructure improvement would be designed, constructed, and operated in accordance with the City's Design Guidelines for Water and Sewer Facilities, and development would be required to abide by the requirements of OCSD's ordinances and wastewater discharge requirements of the NPDES permit. Overall, with compliance with General Plan Update policies related to wastewater and implementation of RR U-1 through RR U-3, impacts related to wastewater infrastructure and wastewater treatment facilities were determined to be less than significant. The GPU PEIR concluded that buildout of the General Plan Update would increase water demand, but the City would have adequate capacity for the proposed increases in water demand across the City and adequate supplies from the City, Orange County Water District, and Metropolitan Water District of Southern California to meet the increased demand. Furthermore, policies in the General Plan Update encourage business and industry to improve their performance in water conservation, promote the implementation of cost-effective conservation strategies and programs that increase water -use efficiency, and encourage and educate residents, business owners, and operators of public facilities to use water wisely and efficiently. Policies also promote the maintenance and upgrade of water infrastructure through impact fees from new development and use of drought -tolerant landscape. Overall, with compliance with General Plan Update policies related to water and implementation of RR U-5 through RR U-7, impacts related to water infrastructure and supply were determined to be less than significant. The GPU PEIR concluded that, while the City is largely developed, buildout of the General Plan Update would result in vacant lots being developed into higher -intensity uses that could increase peak -flow runoff. However, the City has policies in place for reviewing and permitting new developments, which includes review of potential increases in runoff. Policies in the General Plan Update also encourage site drainage features that reduce impermeable surface area, increase surface water infiltration, and minimize surface water runoff during storm events on private and public developments. Overall, with compliance with General Plan Update policies related to drainage and stormwater and implementation of RR U-8.1, RR HYD-1, and RR HYD-4, impacts related to stormwater drainage were determined to be less than significant. July 2024 Page 96