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138 The Preliminary Engineering Study prepared for the Commercial Component by BKF (December 14, 2024) evaluated the preliminary utility, grading and stormwater design of the Commercial Component and found that the site is capable of supporting the Commercial component and concluded (p. 8): “It is our determination that based on the information available at this time, the existing public infrastructure [except recycled water infrastructure] is adequate to serve the proposed development. The site can be readily served by all required utilities and public services and will have a less than significant impact on the existing sanitary sewer, domestic water, and storm drain systems.” The proposed Commercial Component would implement DTPP Plan-Wide Amendments program SEIR Mitigation Measures UT- 1b, “Water System Upgrades”, UT-1c, “Sanitary Sewer Upgrades”, and UT-1d, “Stormwater System Upgrades” through the payment of fair share contribution fees, as required by the City, project design features (i.e. water system upgrades, sanitary sewer system upgrades, stormwater system upgrades described in the Preliminary Engineering Report, subject to review and approval by the City Public Works Department), and system capacity-enhancing improvements funded and/or constructed by the private developers. As part of the realignment and alteration of Arroyo Ojo, a new pipe would convey stormwater runoff from the new creek outlet into the existing storm drain system in accordance with Mitigation Measure UT-1d; flooding impacts are discussed in more detail Section X. Hydrology and Water Quality under c. The study (p. 2) notes that there is no existing recycled water infrastructure to serve the proposed development; however the Commercial Component would install a new recycled water main from the nearest point of connection to the intersection of Jefferson Avenue and Marshall Street, along Marshall Street, Broadway, California Street, and through the entire site frontage to the intersection of new Franklin Street and James Avenue to hook-up to the City’s recycled water system prior to building occupancy, in accordance to Mitigation Measure UT-2, “Recycled Water Infrastructure” (see discussion under b. below). Regarding fire flow, the DTPP program EIR (pp. 10-9 and 10-10) concluded that impacts resulting from DTPP- facilitated development on the water distribution system and on fire flow would be less than significant (see item XV, Public Services, of this checklist regarding fire flow requirements). The DTPP Plan-Wide Amendments program SEIR (p. 10-35) concluded that impacts would be less than significant with implementation of Mitigation Measure UT-1a. The Preliminary Engineering Study provided fire flow calculations for the Commercial Component based on a review of the California Fire Code (2019) (BKF, p. 2). The 901 El Camino Real commercial building has a required fire flow of 4,336 gallons per minute (gpm) as determined by the square footage of the three largest successive floors of the building. Fire flow test information provided by the City of Redwood City indicates that the fire flow available from the City’s domestic water system is 2,750 gpm at 20 psi residual pressure. The Preliminary Engineering Study assumed there would be a 50 percent reduction in rate of flow for fire sprinklers per California Fire Code standards which allows for the required fire flow for a building with an automatic sprinkler system to be reduced. For this reason, the required fire flow for the proposed commercial building would be 2,168 gpm. Because the fire flow of the City’s domestic water system (2,750 gpm) exceeds the required fire flow for the proposed commercial building (assuming a 50 percent flow reduction for fire sprinklers), the Preliminary Engineering Report determined adequate flow and pressure are available to meet Commercial Component fire flows. Additionally, the Commercial Component would be subject to Mitigation Measure UT-1a, “Emergency Water Storage”, which requires the Commercial Component to pay a fair-share contribution towards the cost of providing emergency water storage. Therefore, for the reasons above, the Commercial Component would, therefore, not generate new or more severe impacts related to the relocation or construction of new or expanded utilities facilities beyond those analyzed in the DTPP program EIR and the DTPP Plan-Wide Amendments program SEIR, and there is no new information of substantial importance for CEQA purposes. b. The DTPP program EIR (pp. 10-8 and 10-9) concluded that development facilitated by the DTPP would have no impact on water supply. The DTPP Plan-Wide Amendments program SEIR (pp. 10-31 through 10-36) concurred with the DTPP conclusion with respect to DTPP development but added additional analysis pertaining to growth anticipated with the DTPP Plan-Wide Amendments. Because the Plan-Wide Amendments impact was potentially significant, the SEIR included a new mitigation measure (Mitigation Measure UT-2, “Recycled Water Infrastructure”). Mitigation Measure UT-2 requires use of recycled water via recycled water supply pipeline extensions for all subsequent development projects in the amended DTPP area, as needed, to ensure sufficient recycled water capacity for recycled water demands of projects. The DTPP Plan-Wide Amendments program SEIR analysis also included a description of the current (2020) Urban Water Management Plan for the City, and explained that (1) the City has a contract with the San Francisco Public Utilities Commission (SFPUC) for the provision of an annual supply of 12,243 acre-feet of water through the year 2034; (2) the UWMP was prepared to be consistent with the City’s development projections, including the future population, employment, and water demand projections for buildout of the City’s 2010 General Plan; and (3) the UWMP incorporated the water demands associated with subsequent other proposed development ATTY/RESO.0031/CC RESO CEQA GUIDELINES (901 EL CAMINO REAL) REV: 04-22-25 VR Page 138 of 148