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EVALUATION OF GROUNDWATER SUPPLY ALTERNATIVES WITHIN BERNAL SUBBASIN <br />APRIL 2026 / FINAL / CAROLLO <br />CITY OF PLEASANTON i <br />pw://Carollo/CA/Pleasanton/204894-000000/03 Reports and Studies/02 Deliverables/EvalGWSupply_BernalSubbasin.docx <br /> <br /> <br />Contents <br />SECTION 1 INTRODUCTION 1 <br />1.1 Purpose 1 <br />1.2 Introduction 1 <br />1.3 Background 1 <br />1.4 Project Goals 2 <br />SECTION 2 ALTERNATIVE 1 – BASELINE PROJECT 2 <br />2.1 Project Overview 2 <br />2.2 Infrastructure Improvements 3 <br />2.2.1 City Distribution System Improvements 3 <br />2.3 Estimate of Cost to Purchase GPQ from Zone 7 6 <br />SECTION 3 ALTERNATIVE 2 – JOINT PROJECT 7 <br />3.1 Project Overview 7 <br />3.2 Infrastructure Improvements 8 <br />3.2.1 City Distribution System Improvements 8 <br />3.2.2 Joint Groundwater Supply Improvements with Zone 7 9 <br />SECTION 4 ALTERNATIVE 3 – CITY ONLY PROJECT 11 <br />4.1 Project Overview 11 <br />4.2 Infrastructure Improvements 12 <br />4.2.1 City Distribution System Improvements 12 <br />4.2.2 City Tennis and Hansen Park Wells 13 <br />SECTION 5 ALTERNATIVES EVALUATION 15 <br />5.1 Evaluation Criteria and Weighting 15 <br />5.1.1 Water Supply Reliability 15 <br />5.1.2 Water Quality Reliability 16 <br />5.1.3 Ease of Expansion for Treatment 16 <br />5.1.4 Community and Environmental Impact 16 <br />5.1.5 Implementation Schedule 17 <br />5.2 Alternatives Evaluation 17 <br />5.2.1 Alternatives Evaluation Methodology 17 <br />5.2.2 Alternatives Evaluation Results 19 <br />5.3 50-Year Life Cycle Cost Comparison 23 <br />5.3.1 Cost Estimates 23 <br />5.3.2 Capital Costs 23 <br />5.3.3 Annual O&M Costs and GPQ Purchase Costs 24 <br />5.3.4 Annualized Cost Summary of Each Project Alternative 25 <br />5.4 Cost to Benefit Evaluation 25 <br />SECTION 6 SUMMARY 27