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Scope of Work Preparation of Plans,Specifications and Estimates Sunol Boulevard/I-680 Improvements Project August 21,2023 The drainage report prepared by AECOM will include the following: • Evaluation of the existing conditions • Unusual and special conditions • Drainage mapping • Hydraulic analysis • Proposed systems Task 2.10 Storm Water Data Report AECOM will prepare a 65% PS&E-level Storm Water Data Report summarizing the Project impacts to water quality, general mitigation measures, and recommended Best Management Practices (BMPs) consistent with current Caltrans requirements for PS&E phase. The study will address the impacts from roadway improvements, utilizing Caltrans standard checklists. The report will also address the need for erosion control measures and document the decision-making process relating to the implementation of Treatment BMP's within the project limits. This will include risk assessment to determine the combined sediment and receiving water risk. Under this task, AECOM will prepare a conceptual stormwater pollution prevention plan (CSWPPP) for Caltrans and the City's review and approval. Task 2.11 Hazardous Materials Test Report AECOM will prepare a Hazardous Materials Test Report to evaluate potential contaminants of concern in soil, groundwater, and building materials. Hazardous Materials Test Report in accordance with Caltrans guidelines. AECOM will Prepare work plan for City's/Caltrans' review and approval. Perform borings, to collect soil samples for initial hazardous waste testing and groundwater samples. Soil and/or groundwater found to have environmental contaminants will be properly characterized and disposed of at an appropriate facility, in accordance with applicable regulations. A Draft and Final report will be prepared. 2.12 Foundation Reports/LOTBs AECOM will prepare and submit separate Foundation Reports for each structure (bridge and non-standard plan walls)which have been prepared and signed by an Engineering Geologist or Geotechnical Engineer, with deep foundation experience, registered in California. The Foundation Reports will be prepared in accordance with Caltrans' Guidelines for Foundation Investigations and Reports. This is the list of the reports to be prepared: • Two PFRs (one for the bridge widen and one for all proposed retaining walls) • Six draft FRs and final (one for the bridge widen and one for each of the proposed retaining walls) • Respond to up to two rounds of geotechnical review comments Page 16 of 42