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

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GPU policies. Therefore, the Project's impacts related to the relocation or construction of new or expanded water facilities would be less than significant. As such, impacts resulting from the Project would be less than significant. (Draft Supplemental EIR, p. 4.15-23.) Wastewater The Project would result in an increase in wastewater generation due to the Project site's change in land use from commercial to mixed-use (i.e., residential uses and higher density would result in greater wastewater generation. The Project's generated flow of 0.200 cubic feet per second (cfs)would match the existing flow and no additional wastewater capacity would be required. As part of Project development requirements, the Sewer Capacity Study, was submitted to the Orange County Sanitation District (OC San) to verify capacity of the County sewer mains. OC San review identified that there is existing capacity within the Sunflower trunk main; however, the smaller Vitrified Clay Pipe (VCP) sewer mains in Bear Street and Plaza Drive have no additional capacity beyond current discharges. Thus, the Project would include the construction of an on- site private sewer network that would convey a majority of sewer flows generated west of Plaza Drive within a private sewer network to connect to the City's VCP sewer main.All new connections would be constructed per City and OC San standards. Final alignment, points of connections, and limits of sewer removal and replacement would be developed during the design permitting phase. All proposed wastewater infrastructure improvements and connections would comply with the City of Santa Ana Design Guidelines for Water and Sewer Facilities, City of Santa Ana's Construction Standards and City and OC San standards, which provide design criteria and construction methods. Construction impacts associated with the installation of new sewer connections and facilities would be temporary and would primarily involve trenching in order to place the lines below ground. Further, the proposed wastewater infrastructure improvements would be located in areas within the Project site and in previously disturbed roadways, and thus, the impacts from installation and upgrades of the proposed on-site private sewer network are already accounted for in the various resource sections of this Supplemental EIR. Therefore, with the Project's impacts related to the relocation or construction of new or expanded wastewater facilities would be less than significant.As such, impacts resulting from the Project would be less than significant. (Draft Supplemental EIR, pp. 4.15-23—4.15-25.) Stonnwater The Project's grading and storm drain network would be designed to match the existing drainage and flow patterns to best utilize the capacities available in the existing public storm drain system. The Project would integrate bio-filtration methods, pervious surfaces, and selective plant materials to encourage on-site water retention. Final routing of the storm drain system may require the construction of underground detention systems to handle a minimum of the 10-year design storm, per the latest version of the Orange County Local Drainage Manual and would be developed with City and County input during the design permitting phase. The proposed drain improvements would be constructed within previously disturbed roadways. Additionally, the impacts from installation and upgrades to the storm drain system are already accounted for in the various resource sections of this Supplemental EIR. Therefore, the Project's impacts related to the relocation or construction of new or expanded stormwater facilities would be less than significant. As such, impacts resulting from the Project would be less than significant. (Draft Supplemental EIR, pp. 4.15-25-4.16-26.) Resolution No. 2025-041 Page 59 of 140