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Section 4: Preferred Alternative and Implementation Plan Water Supply Alternatives Study 4-2 DRAFT for review purposes only. Use of contents on this sheet is subject to the limitations specified at the end of this document. Water Supply Alternatives Study-Draft Report.docx project owner selects an Owner Advisor (OA) to prepare performance‑based project requirements and competitively procures a design‑builder based on cost, proposed design solution, and other non‑cost factors. This approach typically works best when: •The project owner’s priorities are early price certainty and schedule acceleration. •The project owner has limited staff resources and can accept less oversight. •The project owner seeks innovation and early contractor involvement in design. •Project involves performance risk (i.e., treatment performance) that project owner wishes to transfer to design‑builder. The delivery method approach should be evaluated in parallel with Zone 7’s groundwater modeling efforts during predesign, and a delivery method should be selected prior to starting design. 4.3 Implementation Plan Figure 4-1 summarizes the preliminary schedule for implementing Alternative 3 (Two New Wells) in terms of major project elements and milestones. The four major project elements identified in the figure include: 1.Predesign. Predesign activities involve: Siting of two well locations, including the City’s planned exploratory wells to test groundwater production rates and water quality and Zone 7’s planned update of its regional groundwater model and Well Siting Master Plan Seeking/securing external funding through grants and/or low-interest loans. 2.Design and Construction of Two New Wells. DBB is the assumed delivery method for the wells’ design and construction. Activities related to this element include: Engineer procurement for well drilling and facility design Permitting, including NEPA/CEQA and permits required through Bay Area Air Quality Monitoring District (air quality permits for generators), Pacific Gas & Electricity (new/modified service applications), Zone 72 (well drilling and abandonment permits), and the State Water Resources Control Board (construction stormwater). Well drilling, including driller procurement and drilling of two wells in series (i.e., one after the other) Well equipping, including contractor procurement and construction of well facilities 3.Design and Construction of Pipelines and Connecting Infrastructure. DBB is the assumed delivery method for design and construction of the new pipelines and connecting infrastructure required to tie the new wells into the City’s existing potable water distribution system. Activities related to this element include: Engineer procurement for design of pipelines and connecting infrastructure Permitting, including NEPA/CEQA Utility investigations, including potholing and geotechnical borings Design of pipelines and connecting infrastructure Contractor procurement Construction of pipelines and connecting infrastructure 2 Zone 7 is the Groundwater Sustainability Agency lead for the Livermore Valley Groundwater Basin.