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95 The existing site is approximately 80 percent impervious. Site cover consists of existing buildings, parking lots, a road, and a creek. The Commercial Component would result in 54,660 SF of onsite impervious surface area, compared to 56,570 SF of onsite impervious surface area under existing conditions (BKF, Attachment 7 (C.3 Checklist)). Therefore, there would be a net decrease in total impervious surface area amounting to 1,910 SF. Under proposed conditions, onsite pervious surface area at 901 El Camino Real would amount to 70,568 SF. All stormwater data and components provided by the Commercial Component applicant are subject to review, approval, and onsite inspection by the City. The Commercial Component would be subject to these standard requirements as conditions of approval. As a result of DTPP standards and the City requirements described above, the proposed project component would not generate additional stormwater drainage impacts beyond those analyzed in the DTPP program EIR. All stormwater data and components provided by the Commercial Component applicant are subject to review, approval, and onsite inspection by the City. The Commercial Component would be subject to these standard requirements as conditions of project component approval. As a result of DTPP Standards and the City requirements described above, the proposed Commercial Component would have a less than significant impact and not generate additional stormwater drainage impacts beyond those analyzed in the EIR/SEIR. This component would be consistent with the analysis in the EIR/SEIR because it would not create new impacts or increase impacts, and there is no new information of substantial importance for CEQA purposes. b. The City of Redwood City does not currently rely on groundwater as a water supply source. Groundwater impacts were analyzed in the DTPP Final EIR and were determined to be less than significant impacts because Redwood City did not then have and had no intention of using groundwater as a water supply, so future development within the DTPP area would not have caused a depletion of groundwater supplies. Additionally, because future developments would be constructed on previously developed land, there would not be a substantial increase in impervious surfaces. The DTPP Plan-Wide Amendments SEIR concurred. Implementation of the proposed Commercial Component would not require substantial amounts of water such that it would result in substantially depleted groundwater supplies (see item XIX[b] [water supply] of this Checklist). Under the State’s Sustainable Groundwater Management Act (SGMA), medium and high priority groundwater basins are required to prepare a Groundwater Sustainability Plan (GSP). The subject site is located in the San Mateo Plain Subbasin – Santa Clara Valley Basin, which according to the City of Redwood City 2020 Urban Water Management Plan (UWMP), has been ranked as a “very low priority” basin and is therefore not subject to the requirements of SGMA. In addition, the proposed Commercial Component would redevelop existing structures in an already urbanized area; as discussed in item (a) above, there would be a net decrease in impervious surface area. As discussed further in section XIX (Utilities and Service Systems) of this Consistency Checklist, the City does not currently use groundwater as a supply source; therefore, it is not anticipated that the Commercial Component would use groundwater for water supply. Therefore, the proposed project component would not substantially decrease groundwater supplies or interfere substantially with groundwater recharge such that the project component would impede sustainable groundwater management of the basin. Furthermore, the DTPP program EIR (p. 10-25) concluded that DTPP-facilitated development would not result in any significant groundwater impacts. The DTPP Plan-Wide Amendments program SEIR (p. 10-41) concurred with the DTPP EIR conclusion. Because the proposed Commercial Component is in compliance with all applicable DTPP Standards related to water supply, hydrology, and water quality, groundwater impacts would be less than significant. This Commercial Component would be consistent with the analysis in the EIR/SEIR because it would not create new impacts or increase impacts, and there is no new information of substantial importance for CEQA purposes. c. As discussed in the DTPP program EIR (pp. 10-16 through 10-17, and 10-23 through 10-25), development facilitated by the DTPP would occur in areas of the City that are currently developed, and increases in impervious surfaces would be relatively minimal (i.e., new impervious surfaces would generally replace existing impervious surfaces and either result in a decrease in impervious surface area due to more extensive use of stormwater control measures or result in a small net increase in impervious surface area). As discussed in item (a) above and the subparts below, the DTPP, including the proposed project component, would therefore not substantially alter the existing drainage pattern of project sites, including the proposed project component site. In addition, the rate or amount of surface runoff would not be substantially increased by new development because new development would be required to comply with the City regulations regarding stormwater and stormwater management, the San Mateo Countywide Water Pollution Prevention Program, and the San Francisco Bay Region Municipal Regional Stormwater NPDES Permit (MRP). i) and ii) As discussed in item (a), the project component would be subject to State Water Board construction requirements (in particular, see NPDES MRP section “C.6. Construction Site Control”). Because the project ATTY/RESO.0028/CC RESO CEQA GUIDLINES (920 SHASTA) - EXHIBIT A REV: 04-22-25 VR Page 95 of 148