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June 11, 2025 <br />Proposal for Stabilization Project Construction, Engineering, and Compliance <br />Management and Phase 2 Preconstruction Engineering and Management <br />WPCP Former Polishing Pond <br />City of San Leandro, San Leandro, California <br /> <br /> <br />Terraphase Engineering Inc. Page 7 of 14 <br /> <br />This task assumes a 3-week total duration for this phase of the Stabilization Project for on-site oversight and <br />management scope, based on review of the provisionally awarded Contractor’s proposal. If the Contractor’s <br />actual construction schedule requires additional on-site oversight, Terraphase will confirm the additional effort <br />with the City, including requesting additional budget if required. <br /> <br />As this task does not include full-time oversight prior to the start of demolition work, the level of effort for this <br />task does not cover any additional required pre-, during-, or post-storm SWPPP BMP inspections during this <br />phase if these are required when Terraphase staff are not already on site. If required, Terraphase will confirm <br />the additional effort with the City, including potentially requesting additional budget. <br />Task 3: Stabilization Phase Engineering, CM, Compliance Management <br />The Stabilization phase of the project is defined as the period encompassing all sludge-soil-cement stabilization <br />operations, ending with the completion of active stabilization operations and the beginning of post- <br />stabilization fill placement. If there is overlap between stabilization and fill operations, the scope of work and <br />assumed level of effort for this phase will continue until all stabilization operations have finished. <br />Terraphase will provide all engineering/QA, CM, and CGP compliance management as described in the <br />Engineering, Construction, and CGP Compliance Management Scope of Work described above during the <br />Stabilization phase of the project and as further detailed below: <br /> <br />• Provide full-time onsite engineering, CM, and CGP compliance field oversight and technical assistance: <br />o Terraphase staff level field manager: Full time, assuming a Mon-Fri work week and maximum <br />50 hours per week, performing the following activities: <br /> Oversee Contractor operations, including observing and confirming that Contractor’s <br />quality control operations are in accordance with the approved Contractor <br />Construction QC Plan. <br /> Quantitative and qualitative documentation of construction progress, including <br />preparing schematics of where work is complete, active work locations, where work <br />has not started. <br /> Track and manage contractor QC data, including noting the physical location of each <br />QC sample location on project drawings. <br /> Perform Engineer’s independent QA sampling. <br /> Complete required daily SWPPP BMP inspections and support required weekly and <br />monthly SWPPP QSD/QSP inspections. <br /> Inspect materials received on-site against the Contractor’s relevant approved <br />submittal. <br /> Provide field support for review and resolution of RFIs, including potentially collecting <br />data, coordinating with the Contractor, discussing potential means of resolution with <br />the Contractor, off-site Engineering personnel, and the City, and documenting these <br />discussions. <br /> Provide field support for identifying, tracking, and resolving construction quality <br />issues, including coordination with Contractor and City staff.