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Table 7-5: City of Pleasanton Normal/Average Year Supply and Demand Comparison (AFA)
<br />Pro,4ctsd
<br />Demands
<br />Treated Water Purchase Request
<br />2010
<br />2015
<br />2020
<br />2025
<br />2030
<br />Purchased from Zone 7
<br />18,320
<br />21,800
<br />22,700
<br />23,400
<br />23,400
<br />City Groundwater (GPQ)
<br />3,500
<br />3,500
<br />3,500
<br />3,500
<br />3,500
<br />Total Water Delivered
<br />21,820
<br />25,300
<br />26,200
<br />26,900
<br />26,900
<br />Estimated Demands
<br />21,282'
<br />22,403
<br />22,403
<br />22,403
<br />22,403
<br />Notes:
<br />a: Demand estimated at 19.0 mgd (21,292 AFA) in 2010 prior to buildout in 2025.
<br />b: Average Day Demands of approximately 20 mgd with natural conservation alter buldout in 2025.
<br />Source: Table 3-2 Baseline water Projection, 2002 City of Pleasanton Urban water Management Plan, page 3-8.
<br />City of Pleasanton
<br />Final Water Supply Assessment
<br />Stoneridge Drive Specific Plan Amendment and Staples Ranch Project
<br />P.wq.a. -VP 01 000162.01 Simples Rosh WWII mSFYrl MU=
<br />7-4
<br />6.0 Supply Demand Comparison
<br />As stated in the UWMP and shown in Table 7 -5, Pleasanton, in accordance with its GPQ will
<br />continue to pump 3,500 AF from City wells every year. This quantity supplements those supplies
<br />purchased from Zone 7. Groundwater is assumed to be drought resistant and would be reliable in
<br />all years. In the event of an extreme emergency, Pleasanton could extract additional groundwater
<br />above the GPQ; however, groundwater replenishment fees may be levied by Zone 7, or could be
<br />waived in the event of an extreme emergency or other reduction; such as, environmental mitigation
<br />needs which may temporarily reduce Sacramento -San Joaquin Delta deliveries in any given year."
<br />This WSA finds that the City of Pleasanton has sufficient water supplies provided by Zone 7 and
<br />within its existing groundwater pumping quota under all hydrologic conditions. Due to Zone 7's long-
<br />term success of delivery of water to all customers and commitment to continue to serve treated
<br />water to all retailers, when SWP curtailments occur, Zone 7 has supply flexibility through increased
<br />groundwater pumping, surface water transfers back and from CSWD and STWSD to continue to
<br />meet all demands. In addition, Zone 7, the City of Pleasanton, DSRSD and the CWSC of Livermore,
<br />could pump additional local groundwater during drought, emergency or other surface supply
<br />reductions to meet demands in the future. Furthermore, as presented in Section 5 consumers and
<br />retailers could effectively reduce demands by 10 or 25 percent to relieve demand pressure on Zone
<br />7 supplies. It is reasonable to assume, based on the consumer demand reductions in 1992 that
<br />Zone 7 customers would again cutback on per- capita use and reduce demands by up to 25
<br />percent
<br />7.2.1 Staples Ranch Project Water Supply Sufficiency
<br />The proposed Staples Ranch project would create an estimated 342 AFA new demand, or about
<br />0.50 percent of Zone 7's anticipated total system demand of 65,490 AFA in 2014, and 0.49 percent
<br />of overall treated water demands of 69,370 AFA by 2030 As stated previously, the UWMP adopted
<br />in 2002 includes potential water demands that would be generated by land uses designated by the
<br />1989 Stoneridge Drive Specific Plan, including 100 acres of commercial development and a 17.2
<br />acre community park on the Staples Ranch project site. Potential water demands were estimated
<br />for the land uses of the Stoneridge Drive Specific Plan; however, a 20 year gap exists between this
<br />adopted Specific Plan and actual project implementation. Moreover, within this 20 year period, land
<br />use and water supply planning has evolved and water demand factors associated with specific land
<br />uses or facilities has been refined. With that understanding, this WSA, per the requirements of SB
<br />610 calculates the water demands of the current proposed project by assuming water demands
<br />factors associated with these proposed uses.
<br />37 2002 City of Pleasanton, Urban Water Management Plan page 2-4.
<br />38 Only voluntary stages were implemented from the City's drought ordinance. In 1991 and 1992 the City experienced a
<br />high level of customer cooperation. 2002 City of Pleasanton, Urban Water Management Plan, page 10-4.
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