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6.1E Page 11 6. WATER SUPPLY SUFFICIENCY ANALYSIS Being that Stanford has agreed to build the Project with dual-plumbing and has committed to use recycled water for both irrigation and for allowable indoor uses, Redwood City will have sufficient water supplies to meet the expected future water demands of the Stanford in Redwood City Project. In most years, the projected water supplies will be sufficient to satisfy the demands of the Stanford in Redwood City Project. During periods of shortages, however, supplies would not be sufficient to meet City-wide demand of 11,724 af/yr. As a result, cutbacks would be required (as illustrated in the City's UWMP). However, cutbacks would be required with or without this particular Project and the Project would not increase the level of cutbacks that would be required in 2030 if the City achieves its projected growth. To achieve these cutbacks, the City would rely on its Water Shortage Contingency Plan, which is set forth in the City's 2005 UWMP. This Plan contains five different stages of action, each corresponding to a specific level of water reduction. The Plan contains measures ranging from public education and requests for voluntary cutbacks to mandatory restrictions and prohibitions. In times of shortage, the City would rely on these measures to erisure that demands do not exceed supplies. Under 5B 610, the primary issue to be addressed in the WSA is: will the projected water supply for the next 20 years - based on normal, single dry, and multiple dry years, meet the demand projected for the proposed project plus existing and planned future use, including agricultural and manufacturing uses? (See SB 610 Flowchart in Attachment 3). This section of the WSA addresses this question, and is based on information contained within the Redwood City 2005 UWMP. Future Water Supply Reliability Fig ure 1 shows the historic and projected water use for Redwood City between 1975 and 2030. The projections show the incremental impacts from the City's water conservation and recycled water programs. Over time, the reduction in potable water use from these three programs progressively adds up and equals 3,374 at/yr, or 250/0 of water demands in 2030. Figure 1 also shows the expected SFPUC water supplies associated with 100/0 and 200/0 system-wide cutbacks that could be implemented by SFPUC, as previously described, in event of drought or emergencies. Table 3 shows this information in tabular form. As shown, holding all factors constant, Redwood City would be only modestly impacted by the 100/0 SFPUC cutback scenario. Under the 200/0 cutback scenario, Redwood City would be significantly affected, needing to reduce water use by between 19.5 and 27.70/0. Thus, conservation savings and recycled water use will greatly lessen but not entirely avoid the impacts of future droughts. Page 8 of 11