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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 8 of 14 <br /> Support contract change management, including measuring/confirming change <br />quantities, reviewing change requests, coordination with Contractor, Engineering <br />personnel, and the City. <br /> Conduct on-site pay application site meeting with Contractor prior to formal submittal <br />and/or for review and recommendation to City after submittal. <br /> Attending Contractor daily health and safety tailgate meetings. <br /> Prepare and submit a Daily CM/Engineering/QA Report after each day of on-site <br />oversight. This report will include a summary of work performed, CM activities, <br />Engineering support activities, QA activities, technical/production issues encountered, <br />representative photos, and a 1-week lookahead of significant CM/engineering/QA <br />tasks. <br />o Terraphase engineering/CM lead, 12 total days on-site as detailed below: <br /> 2 days on site per week during Weeks 1-3 of stabilization operations (6 total days on <br />site) <br /> 1 day on site per week during Weeks 4-6 of stabilization operations (3 total days on <br />site) <br /> 1 day on site during Weeks 7-10 of stabilization operations (1 total day on site) <br /> 2 days on site during Week 11 (assumed final week) of stabilization operations to <br />facilitate stabilization closeout (2 total days on site) <br />o Terraphase Geotechnical Engineering Subject Matter Expert: 3 partial day site visits during <br />stabilization operations to review operations and provide technical support if needed. <br />• Conduct QA field penetrometer and laboratory testing of completed stabilization cells to compare with <br />Contractor-provided data. Assumes one duplicate confirmation laboratory sample per week, and up to <br />one duplicate field penetrometer test per day when on site and as available during active stabilization <br />operations. QA confirmation laboratory sample collection method will be determined after reviewing <br />the Contractor’s Stabilization Construction Quality Control Plan. <br />• Conduct monthly QSD/QSP dry-weather SWPPP inspections, weekly on-site BMP inspections, and any <br />pre-, during-, and post-storm inspections that are required. <br />• Conduct off-site engineering, QA, CM, and CGP support, including reviewing and resolving RFIs, <br />preparing design modifications and technical field orders, submittal review, QA reporting, and <br />compliance reporting as described in the Engineering, Construction, and CGP Compliance <br />Management Scope of Work. <br /> <br />This task assumes a 11-week total duration for this phase of the Stabilization Project for on-site oversight and <br />management scope, based on review of the provisionally selected 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 potentially requesting additional budget. <br />Task 4: Fill Phase Engineering, CM, Compliance Management <br />The Fill phase of the project is defined as the period beginning after completion and acceptance of all sludge- <br />soil-cement stabilization operations, and includes all fill import, placement, compaction, and grading, <br />installation and testing of the post-fill dewatering system. This phase ends at the start of site cleanup, <br />demobilization, and project closeout.