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EVALUATION OF GROUNDWATER SUPPLY ALTERNATIVES WITHIN BERNAL SUBBASIN <br />APRIL 2026 / FINAL / CAROLLO <br />CITY OF PLEASANTON 13 <br />Table 5 Alternative 3 City Distribution System Improvements <br />Improvement <br />Number(1) <br />Type of <br />Improvement <br />Size (inches) Length (lf) Cost Share <br />(City / Zone 7) <br />Capital Cost, City <br />Share ($)(2) <br />F-1 Pipe 24 5,250 City (100%) 3,810,000 <br />F-2 Pipe 24 310 City (100%) 220,000 <br />F-7 Pipe 16 3,450 City (100%) 1,900,000 <br />F-8 Pipe 12 2,250 City (100%) 1,030,000 <br />Notes: <br />(1) The information presented in this table is from Akel’s Hydraulic Analysis Results Package No. 1 (Revised) (Akel, <br />November 2025). <br />(2) Costs provided in Akel’s Hydraulic Analysis Results Package No. 1 are from April 2023. According to Engineering News <br />Record’s 20-City Cost Index, market escalation from April 2023 to January 2026 is 6.6 percent. The costs provided in this <br />table are escalated to 2026 dollars and rounded to the nearest ten thousand. <br />4.2.2 City Tennis and Hansen Park Wells <br />The new groundwater production wells are located at Tennis Park (5801 Valley Ave, Pleasanton, CA) and <br />Hansen Park (5697 Black Ave, Pleasanton, CA). Transmission pipelines connect each well to the City’s <br />distribution system. Figure 8 shows an overview of the proposed Tennis Park well locations and Figure 9 <br />shows an overview of the proposed Hansen Park well locations. <br />As shown in Figure 8 and Figure 9, the City is considering two locations for the new well facilities within <br />both Tennis Park and Hansen Park sites and will continue to evaluate the locations within both parks <br />during final design. Selection of the well facility location will consider routine site access, special O&M <br />access (i.e., portable generators, equipment removal with cranes), storm drain capacity for pump-to-waste <br />operation, ease of PG&E service, and noise ordinance (construction and operation). In addition, <br />architecture and landscaping requirements at both well facilities will be coordinated during final design to <br />minimize visual impacts to park users and nearby residents. <br />The wells for the City Only Project will be designed for 2,500 gpm each, which is approximately 40-50 <br />percent of the well capacities of the Joint Project. With the lower capacity, it was assumed the costs for <br />construction of the well and associated facilities for the City Only Project are approximately 75 percent of <br />the Joint Project costs. Sizing of the well buildings, well pump and motor, electrical equipment, and other <br />required facilities will be determined during final design.