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

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South Coast Technology Center Project CEQA Exemption 15183 the proposed Project would result in less than significant impacts related to flood hazard, tsunami, and seiche zones. Based on the above, the Project would not result in new or substantially more severe impacts compared to the determinations of the GPU PEIR, which concluded that impacts related to violation of water quality standards or waste discharge requirements; decrease in groundwater supplies or interference with groundwater recharge; alteration of existing drainage patters; flood, tsunami, or seiche risks; and conflicts with or obstruction of a water quality control plan or sustainable groundwater management plan would be less than significant. Therefore, no new project -specific mitigation measures are required. 4.10.3 Conclusion The Project is consistent with the General Plan Update. With implementation of RR HYD-1, RR HYD-2, RR HYD-4, and RR HYD-5 identified in the GPU PEIR, the proposed Project would not have any specific effects which are peculiar to the Project or the Project Site. There are no Project specific impacts or potentially significant off -site or cumulative impacts that the GPU PEIR did not analyze, and there are no new significant or substantially more severe impacts to hydrology and water quality than anticipated by the GPU PEIR. 4.10.4 Applicable GPU PEIR Regulatory Requirements/Mitigation Measures: RR-HYD-1 All development pursuant to the General Plan Update shall comply with the requirements of the Construction General Permit (Order No. 2012-0006-DWQ)28 for stormwater discharges associated with construction activity. Compliance requires filing a Notice of Intent, a Risk Assessment, a Site Map, a Storm Water Pollution Prevention Plan and associated best management practices, an annual fee, and a signed certification statement. RR-HYD-2 All industrial development pursuant to the General Plan Update shall comply with the requirements of the General Industrial Permit (Order No. CAS000001). The General Industrial Permit regulates operators of facilities subject to stormwater permitting, that discharge stormwater associated with industrial activity. RR HYD-4 All development pursuant to the General Plan Update shall comply with the requirements of the Orange County MS4 Permit (Order R8-2009-0030, NPDES No. CAS618030, as amended by Order No. R8-2010 0062). The MS4 Permit requires new development and redevelopment projects to: • Control contaminants into storm drain systems • Educate the public about stormwater impacts • Detect and eliminate illicit discharges • Control runoff from construction sites • Implement best management practices and site -specific runoff controls and treatments for new development and redevelopment. 28 The proposed Project would be subject to the most recent Construction General Permit (Order No. 2022-057-DWQ), which was adopted on September 8. 2022. July 2024 Page 71