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<br />Amendment No. 3 to <br />Consulting Services Agreement between City of San Leandro and Terraphase Engineering, Inc 9/13/2024 <br />for Treatment Wetland Design Services Page 3 of 8 <br />Task 1.3: Post-Test In-Situ Sampling <br />After implementation, a Terraphase field engineer and Odin personnel will mobilize to the site at 3 days, 7 <br />days, and 14 days after demobilization to collect samples of stabilized soil-sludge mixture from each test <br />cell for unconfined compressive strength analysis. <br /> <br />Task 1.4: Closeout and Completion Reporting <br />After demobilization, receipt of Odin closeout reporting, and receipt of post-test sample analytical results, <br />Terraphase will close out the Odin subcontract and prepare a closeout report that summarizes the pilot test <br />operation, production rate data, as-built site conditions, quality control activities and conclusions, pilot cell <br />unconfined compressive strength data and conclusions, safety and logistical lessons learned, and technical <br />recommendations for full scale implementation. A draft closeout report will be submitted for City review and <br />finalized per City review comments. <br /> <br />Task 1.5: Pilot Test Contingency <br />Terraphase has developed a contingency task to respond to additional unforeseen scope of work that <br />requires additional Terraphase labor level of effort. Terraphase will only access this budget upon approval <br />from the City. Please note that this task does not include additional contingency funding for the Odin <br />subcontract. Any required additional funding for Odin will only be based on an approved change order <br />request to the Odin subcontract. <br /> <br />Task 2: Stabilization Project Preconstruction Design Support <br />Terraphase expects the Stabilization Project will be constructed first; after which the stabilized surface will <br />be allowed to undergo settlement before mobilization of the Treatment Wetland Project <br /> <br />Task 2 Scope of Work <br /> <br />Task 2.1: Development of Issued for Bid (IFB) Plans, Specifications, and Cost Estimate (PS&E) The <br />existing design documents for the project do not currently include bid-ready PS&E for the Stabilization <br />Project. Terraphase will prepare the following IFB PS&E documents for use in the Stabilization Project bid <br />package and to review bidder proposals: <br /> <br />• Scope Delineation: Terraphase will work with the City to confirm the breakdown of specific <br />construction tasks to be completed in the Stabilization Project contract vs. the subsequent <br />Treatment Wetland Project contract based on the overall scope organization described in this <br />proposal. Construction task delineation will be based on the type of work, necessity of specialized <br />skillset/methods/equipment, when the task needs to be completed within the overall project <br />sequence of work, and physical location of the task. Scope delineation will be documented in a <br />brief technical memorandum and will be approved by the City before proceeding with IFB PS&E <br />development. <br /> <br />• IFB Design Plans: Terraphase will compile and adapt existing 100% design drawings and develop <br />up to five new design drawings that depict pond stabilization work areas, soil stockpile locations, <br />staging/support areas, pond clear/grub/demolition areas, design stabilization and post-stabilization <br />clean fill elevations, stabilization/fill sections and details. Adaptation of existing 100% drawings will <br />include minor revisions to these drawings only as needed to clearly depict/delineate the scope of <br />Docusign Envelope ID: 53244CDF-B5C0-43CD-8884-BC457F7EFEA3