The Consultant will provide engineering services for all six project phases but will only provide a detailed scope and fee for the first three phases as part of this RFP. During the planning and design phases, the Consultant and SacSewer will work to resolve design issues, leading to the production of contract documents for construction. During the construction phase (under a future amendment), the Consultant will assist SacSewer with requests for information (RFIs) and submittal reviews from the contractor and will provide other construction support services relating to the installation of the facilities. The Consultant will also participate as necessary during the commissioning and closeout phases of the Project.