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June 11, 2025 Proposal for Stabilization Project Construction, Engineering, and Compliance Management and Phase 2 Preconstruction Engineering and Management WPCP Former Polishing Pond City of San Leandro, San Leandro, California Terraphase Engineering Inc. Page 2 of 14 experienced core Terraphase team provides full engineering, construction QA, construction management, and CGP compliance management services. The Terraphase team includes team members with extensive project experience with experience developing the engineering design, specifications, and compliance strategy for the Stabilization Project and who have the experience and expertise to serve these multiple roles simultaneously, providing the City a unified point of contact when managing this project. This proposal first describes Terraphase’s proposed overall management role and responsibilities during construction of the Stabilization Project, then organizes this scope of work into proposed Tasks 1-5, which are primarily organized by the following operational phases of the Stabilization Project: 1. Premobilization Phase 2. Mobilization/Site Setup Phase 3. Stabilization Phase 4. Fill Phase 5. Closeout Phase This proposal includes CGP compliance during construction of the Stabilization Project as Task 6. The duration of the above phases of Stabilization Project is based on review of the schedule information provided in the provisionally awarded contractor’s proposal with allowances for minor schedule extension. The assumed duration of each phase is provided in the detailed scope descriptions for Tasks 1-5. Task 7 of this proposal includes additional engineering and construction management support for the City to: • Provide construction and contract management support during Phase 2 bidding and procurement, as Terraphase has provided during Stabilization Project bidding and procurement. • Provide a more extensive Phase 2 cost estimate update than the currently contracted update. • Provide engineering and coordination support with the City and others to integrate the Phase 2 instrumentation and controls (I&C) system into the WPCP I&C system. • Revise the design of the WPCP effluent tie-in valve as discussed with the City and facilitate a constructability review of the Phase 2 treatment wetland subgrade liner by a qualified contractor. • Revise and maintain the Phase 2 project schedule with additional detail and information as Phase 2 preconstruction planning and design updates progress. Stabilization Project Engineering, Construction, and CGP Compliance Management Scope of Work Terraphase will provide the following engineering, construction, and compliance management services through the duration of the Stabilization Project, from City Notice to Proceed through project closeout. 1. Set up and administer a Construction Management Information System (CMIS) using Procore, for the Stabilization Project to be used by the City, contractors, and Terraphase to manage project workflows and documentation. 2. Receive, manage/organize, review and approve construction contractor’s submittals as detailed in the project specifications. The proposed level of effort for submittal management assumes that all submittals can be approved and closed after a maximum of two revision and resubmittal iterations. 3. Receive, review and approve all materials used in the project, including reviewing/approving proposed substitutions.