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4 NO ENVIRONMENTAL EFFECTS AND LESS THAN SIGNIFICANT <br />ENVIRONMENTAL EFFECTS WITHOUT MITIGATION MEASURES <br />Findings: The City finds that the Project would result in less than significant impacts to hydrology <br />and water quality related to stormwater drainage. Additionally, the City finds that the Project will <br />implement regulatory requirements RR HYD-1; RR HYD-4; and RR HYD-5 (listed above). (Draft <br />Supplemental EIR, pp. 4.7-19 - 4.7-20.) <br />Explanation of the Rationale: As previously discussed, the Project would adhere to applicable <br />permits (e.g., Construction General Permit and Santa Ana RWQCB's Groundwater Discharge <br />Permit, if necessary) and implement a project -specific SWPPP and associated BMPs; therefore, <br />construction of the Project would not substantially alter the existing drainage pattern of the site or <br />area in a manner which would result in substantial runoff water or polluted runoff. <br />The Project grading and storm drain network would be designed to match the existing drainage <br />and flow patterns to best utilize the capacities available in the existing public storm drain system <br />and may use underground detention systems and/or on -site drainage systems to contain excess <br />flows. The Project site would be required to implement bio-filtration as the primary water quality <br />treatment method. During each phase of Project development, the associated localized drainage <br />and water quality systems dedicated to each building site would be confirmed during the design <br />permitting phase with the City and constructed with each building before connecting to the on -site <br />backbone storm drain system. Therefore, the Project would not create or contribute runoff water, <br />including ponding water, which would exceed the capacity of existing or planned stormwater <br />drainage systems or provide substantial additional sources of polluted runoff. Impacts would be <br />less than significant. (Draft Supplemental EIR, pp. 4.7-19 - 4.7-20.) <br />Threshold HYD-3(iv): The Project would not substantially alter the existing drainage pattern of <br />the site or area, including through the alteration of the course of a stream <br />or river or through the addition of impervious surfaces, in a manner which <br />would impede or redirect flood flows. <br />Findings: The City finds that the Project would result in less than significant impacts to hydrology <br />and water quality related to flood flows. Additionally, the City finds that the Project will implement <br />regulatory requirements RR HYD-1; RR HYD-4; and RR HYD-5 (listed above). (Draft <br />Supplemental EIR, pp. 4.7-20 - 4.7-21.) <br />Explanation of the Rationale: As discussed previously, with adherence to the applicable permits <br />(e.g., Construction General Permit and Santa Ana RWQCB's Groundwater Discharge Permit, if <br />necessary), implementation of a project -specific SWPPP and associated BMPs, construction of <br />the Project would not substantially alter the existing drainage pattern of the site or area in a <br />manner which would impede or redirect flood flows. Additionally, the Project site is not located <br />within a Special Flood Hazard Area, defined as the area that will be inundated by the base flood <br />or 100-year flood. Therefore, the potential for Project facilities to impede or redirect flood flows is <br />considered low. Impacts would be less than significant. (Draft Supplemental <br />EIR, pp. 4.7-20 - 4.7-21.) <br />Threshold HYD-4: The Project would not, in flood hazard, tsunami, or seiche zones, risk <br />release of pollutants due to project inundation. <br />Findings: The City finds that the Project would result in less than significant impacts to hydrology <br />and water quality related to flood hazard, tsunami, or seiche zones. Additionally, the City finds <br />City of Santa Ana The Village Santa Ana Specific Plan Project <br />August 2025 CEQA Findings of Fact and Statement of Overriding Considerations <br />4-23 <br />