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139 projects, including those facilitated by the DTPP Plan-Wide Amendments. Finally, a Water Supply Evaluation was prepared for the SEIR, which analyzed anticipated growth from the DTPP Plan-Wide Amendments and supported the SEIR conclusion that, with implementation of Mitigation Measure UT-2, there would be sufficient water supplies to accommodate growth anticipated under the DTPP Plan-Wide Amendments project. Water Supply Assessment Per the requirements of SB 610, a water supply assessment (WSA) is required for a development project if the project includes “a proposed commercial office building employing more than 1000 persons or having more than 250,000 square feet of floor space” and “a mixed-use project that includes one or more of the projects specified in this subdivision.” The project is required to prepare a water supply assessment (WSA) for the Commercial and Housing Components combined because the Commercial Component proposes approximately 305,225 square-feet (SF) of office/R&D uses and approximately 6,450 square-feet of teen center/ multi-purpose use and the Housing Component is part of the overall project for CEQA purposes. The City of Redwood City Public Works Services Department has prepared a draft WSA, dated 2/27/2025, for the two project components combined in compliance with SB 610. The draft WSA describes the projected water demand of the combined Commercial and Housing Components and compares the projected demand with the available water supply to determine whether water supplies are, or will be, insufficient to serve the proposed project (Commercial Component and Housing Component) and whether the public water system must provide the City with its plans for acquiring additional water supplies to serve the proposed project. The draft WSA analyzes the Commercial and Housing Components combined because collectively the two components comprise one project for CEQA purposes. Therefore, the following discussion provides an analysis of the total estimated water demand for the proposed Project (Commercial Component and Housing Component). The discussion below summarizes the findings of the WSA; additional detail can be found in the WSA report. As described in the Project Description of this consistency analysis, the scope of the Commercial Component has changed since the adoption of the DTPP Plan-Wide Amendments program SEIR, with an increase of the proposed office use square footage from 259,000 sf to 305,225 sf. The draft WSA considers this change in the proposed project, and uses the current project proposal in the comparison of projected water demand with water supply availability. The current proposal increases potable water demand by 21.2 acre-feet per year (afy) [approximately 6.9 million gallons per year] and recycled water demand by 45.0 afy [approximately 14.7 million gallons per year], for a total additional demand of 66.2 afy [approximately 21.6 million gallons per year] compared to the prior version of the Commercial Component that was included in the City’s 2020 Urban Water Management Plan (UWMP). The WSA estimates the projected total water demand required for the proposed Project is 35.9 afy [approximately 11.7 million gallons per year] of potable water and 68.1 afy [approximately 22.2 million gallons per year] of recycled water. According to the Commercial Component Preliminary Engineering Report (p. 2), there are currently no recycled water mains in the vicinity of the subject site. As noted in the draft WSA, Redwood City Municipal Code Section 38.52 [the City Recycled Water Ordinance], requires all new commercial and multi-family residential properties located within the recycled water service area to be dual plumbed to provide for internal use of recycled water and must use recycled water for landscape irrigation. The Commercial component would provide dual plumbing that would include a separate plumbing system for water closets, urinals, trap primers, and landscaping irrigation. Although the Commercial Component site is not currently served by recycled water infrastructure, the project 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 project site frontage to the intersection of new Franklin Street and James Avenue to ensure that recycled water was available upon building occupancy in accordance with Mitigation Measure UT-2, “Recycled Water Infrastructure”. Landscape irrigation would conform to all City regulations and the California Water-Efficient Landscape Ordinance, which means, in part, that all plantings would be irrigated with a drip or other point-source irrigation system, and a bubbler irrigation system would be used for trees. All Commercial Component utility designs, including those for landscape irrigation and building plumbing, would be subject to review and approval by the City Public Works Department. The draft WSA included both potable and recycled water uses in the water demand projections for the Commercial Component to conform to the requirements of Redwood City’s Municipal Code. The City purchases all its potable water supplies from the San Francisco Regional Water System (RWS), which is operated by the San Francisco Public Utilities Commission (SFPUC). The WSA based the availability and reliability of the City’s water supplies primarily on information contained in the City’s 2020 UWMP and the SFPUC 2020 UWMP. ATTY/RESO.0031/CC RESO CEQA GUIDELINES (901 EL CAMINO REAL) REV: 04-22-25 VR Page 139 of 148