2025-041 - Certifing Final Supplemental Enviromental Impact for The Village

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that the Project will implement regulatory requirements RR HYD-1; RR HYD-4; and RR HYD-5 (listed above). (Draft Supplemental EIR, pp. 4.7-21 —4.7-22.) Explanation of the Rationale: The Project site is not located within a Special Flood Hazard Area and the risk of flood hazard is low. Tsunamis affect low-lying areas along the coastline. As the Project site is located approximately 6 miles from the coastline, the risk of tsunami hazard is low. The Project site is within the inundation area of the Santiago Creek and the Prado Dam. However, as stated in the GPU PEIR, the USACE and DSOD have ongoing assessments and measures to certify dam efficiencies, and Santiago Creek and Prado Dam are required to maintain EAPs, which would help minimize property damage and loss of life in emergency conditions. Therefore, the risk of project inundation is low. Impacts would be less than significant. (Draft Supplemental EIR, pp. 4.7-21 —4.7-22.) Threshold HYD-5: The Project would not conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan. Findings: The City finds that the Project would result in less than significant impacts to hydrology and water quality related to conflict with a water quality control plan or sustainable groundwater management plan. Additionally, the City finds that the Project will implement regulatory requirements RR HYD-1; RR HYD-4; and RR HYD-5 (listed above). (Draft Supplemental EIR, pp. 4.7-22—4.7-23.) Explanation of the Rationale: The Project would adhere to the requirements of the Construction General Permit, Orange County MS4 Permit, and the City's Municipal Code as required by RR HYD-1, HYD-4, and HYD-5, to reduce impacts to surface and groundwater quality. Water supply for the Project would be provided by connections to the existing City utility infrastructure and not by groundwater wells.The project's projected water demand would be sufficiently accommodated by the City's water supply.Therefore,the Project would not obstruct or conflict with a water quality control plan or sustainable groundwater management plan. Impacts would be less than significant. (Draft Supplemental EIR, pp. 4.7-22—4.7-23.) Cumulative Impacts: The Project would not result in cumulative impacts concerning hydrology and water quality. Findings: The City finds that the Project would result in less than significant cumulative impacts concerning hydrology and water quality. Additionally, the City finds that the Project will implement regulatory requirements RR HYD-1; RR HYD-4; and RR HYD-5 (listed above). (Draft Supplemental EIR, pp. 4.7-23 --4.7-25.) Explanation of the Rationale: Similar to the Project, construction activities associated with GPU buildout and the related projects have the potential to convey soils and other pollutants into municipal storm drains. During operation of these projects, stormwater runoff from project sites could introduce or increase pollutants that could runoff into municipal storm drains. However, as with the Project, projects developed pursuant to the GPU and the related projects within the watersheds would be required to implement water quality control measures pursuant to the NPDES General Construction Permit, such as implementation of a SWPPP (for projects disturbing greater than one acre), a Resolution No. 2025-041 Page 44 of 140