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City of Pleasanton 5.0 Demands Final Water Supply Assessment Stoneridge Drive Specific Plan Amendment and Staples Ranch Project 6.1.2 Local -City of Pleasanton Demands The City of Pleasanton maintains a treated water supply agreement with Zone 7, Table 6-4 shows total water purchased from Zone 7 to meet City demands over the last five years. The City supplements purchased Zone 7 supplies with 3,500 AFA of groundwater pumped from three City local wells.30 Total City demands are also shown in Table 6-4. Table 6-4: City of Pleasanton Treated Water Purchases 2002-2006 (AFA) Year 2002 2003 2004 2005 2006 Total Su I from Zone 7a 14,744 14,367 15,614 14,553 14,911 74,190 Groundwater GPQ h 3,500 3,500 3,500 3,500 3,500 3,500 Total Ci Demands 18,244 17,867 19,114 18,053 18,411 77,690 Notes: a: Zone 7 Water Agency Retail Deliveries 2002-2006. b: Ci of Pleasanton GPQ. The City of Pleasanton anticipates buildout in 2025; at that point, demands would plateau and remain fairly consistent through 2030.31 Estimated demands associated with the 2025 population are 25,300 AFA and by 2030 total demands could increase to 26,900 AFA, or approximately 24 mgd.32 Figure 3-9 from the City's 2002 UWMP presents some water saving data related to natural conservation through water fixture retrofits and other "best management practice" expected to be implemented in City water conservation programs. Projected water demands are shown in Table 6-5. In single dry or multiple dry year scenarios or SWP reductions, this WSA takes a conservative water supply planning approach; first, to remain consistent with Zone 7's regional water supply planning and second, by assuming demands in the City of Pleasanton will remain the same in any given hydrologic year or when changes in SWP deliveries occur due to environmental constraints, as was the case in June 2007.33 Figure 3-9 Baseline Water Demand ProJecnon with and without Veturdh~ Occarring Consn,•anoa M.0 E 20.0 3 a 15.0 <' 70.0 +Idodel Projection - No Coinervalion t Plumbing eiM Appliance Codes Oily 30 City of Pleasanton, 2002 Urban Water Management Plan, page 4-2 31 City of Pleasanton, 2002 Urban Water Management Plan, Figure 2-4, page 2-10. 32 Table 3-2 Baseline Water Projection, 2002 City of Pleasanton Urban Water Management Plan, page 3-8. 33 City of Pleasanton Newsletter dated June 8, 2007: Regarding Department of Water Resources Pump Shutdown June 2007 Zone 7 provided adequate water to Pleasanton by utilizing ground water storage in addition to supplies in the Del Valle Reservoir. P:\Projects - WP OnIy141162.01 Staples Ranch WSA\FinahFinal WSA.doc 6-3 fiP fiPA ^EPy •~', fiP+ ~A, ~O M1~ ~.~ M1~ ~~ ti°a ,N' 'Ati~ ti°•B '~°' Year