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Table 7-4: Zone 7 Protected Average Year Supply and Demand (AFA)
<br />Treated Water Purchasers
<br />Projected Demands
<br />2005
<br />2010
<br />2015
<br />2020
<br />2025
<br />2030
<br />City of Livermore
<br />7,470
<br />7,620
<br />9,400
<br />9,900
<br />10,200
<br />10,200
<br />City of Pleasanton
<br />15,670
<br />18,320'
<br />21,800'
<br />22,700'
<br />23,400'
<br />23,400'
<br />CWSC
<br />8,470
<br />10,320
<br />12,600
<br />13,200
<br />13,650
<br />13,700
<br />DSRSD
<br />11,760
<br />12,820
<br />12,100
<br />12,900
<br />13,250
<br />13,320
<br />Other Customers
<br />280
<br />290
<br />340
<br />410
<br />460
<br />500
<br />Total of Potable Water Sales
<br />43,650
<br />49,370
<br />56,240
<br />59,110
<br />60,960
<br />61,120
<br />Agricultural
<br />3,900
<br />8,250
<br />8,250
<br />8,250
<br />8,250
<br />8,250
<br />Total Water 851es
<br />47,550
<br />57,620
<br />64,490
<br />67,380
<br />69,210
<br />69,370
<br />2007 Sustainable Supply`
<br />88,400
<br />87,600
<br />87,500
<br />87,500
<br />87,500
<br />87,600
<br />Potential Supply Surplus'
<br />29,880
<br />23,010
<br />20,140
<br />18,290
<br />18,130
<br />Operational Demands
<br />Artificial recharge of Main Basin'
<br />9,000
<br />15,000
<br />20,000
<br />20,000
<br />25,000
<br />30,000
<br />Surplus water to STWSDg
<br />5,166
<br />5,000
<br />5,000
<br />5,000
<br />5,000
<br />5,000
<br />Operational Demand Totals
<br />14,166
<br />20,000
<br />25,000
<br />25,000
<br />30,000
<br />35,000
<br />Total Demands"
<br />61,716
<br />77,620
<br />89,490
<br />92,360
<br />99,210
<br />104,370
<br />Total Available Supply'
<br />100,500
<br />100,500
<br />100,500
<br />100,500
<br />100,500
<br />105,500
<br />Surplus
<br />39,000
<br />23,400
<br />11,000
<br />-7,600
<br />-1,500
<br />-1,500
<br />Notes:
<br />a. Includes proposed pajsctdemands
<br />b. Potable and Untreated Water Sales.
<br />c. Zons 7 Water Agency Mnual Review Of The Sustainable Water Supply, May 16, 2007.
<br />d: From 2005 Mnual Review Of The Sustainable Water Supply, July Update, July 2005.
<br />e: Potential surplus available to meet Zons 7 Operational Demands
<br />1. Estimated imported water used to offset Zone 7 groundwater extractions from We Main Basin assuming that groundwater lumping averages 15,000
<br />20.000 AFA. Recharge could be as high as 30,000 AFA in 2030.
<br />g. Estimated surplus imported water conveyed to Semitropk: Water Storage District for Out-of -Basin groundwater banking.
<br />h. Projected sum of all water demands for Zons 7 Water Agency this Is the sum of Total Water Sales and Operational Demands..
<br />L Total Avalleble Supply N estimated at 100, 500 105,000 AFA depending on Zone 7 groundwater e4ractions -use Table 5-2 Zone 7 Supply Sources.
<br />Source: PBS&J, October 2007 adapted from Zone 7 Water Agency Urban Water Management Plan, Table 6: Water Demand Purchase Projection, page 35.
<br />City of Pleasanton
<br />Final Water Supply Assessment
<br />Stoneridge Drive Specific Plan Amendment and Staples Ranch Project
<br />6.0 Supply Demand Comparison
<br />available to meet both retail and operational demands in all years. In years of above average
<br />rainfall, Zone 7 could possibly store more water throughout its storage system effectively building up
<br />more supplies for dry or multiple dry years
<br />7.2 Local Water Supply Sufficiency City of Pleasanton
<br />Table 7-5 compares the City's projected supply and demand over a twenty -five year planning
<br />horizon out to 2030. As shown in Table 7-5, the City can satisfy all customer demands in each year.
<br />In fact, in certain years, the City could expect to have surplus supplies because actual treated water
<br />deliveries from Zone 7 are less that annual requested delivery amounts; consequently, surplus
<br />supplies would be used as additional supplies for Zone 7's drought prevention storage options.
<br />38 2005 Zone 7 Water Agency, Urban Water Management Plan, page 33.
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<br />7-3
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