Task 1 – Data Collection and Review Existing Information: This task involves reviewing maps, documents, and data related to the sewer system, including the City’s GIS files; plans and reports; maps and drawings of sewer system facilities and recent sewer improvement projects; water use and customer account data; historical flow monitoring data; the City’s General Plan and other relevant planning information; and sewer maintenance and Closed-Circuit Television (CCTV) inspection data. Task 2 – Develop Sewer System Model: In this task, a hydraulic model of the City’s trunk sewer system shall be developed using software. The hydraulic model includes all major sewer mains appropriate for hydraulic modeling. All of the sewer mains modeled in the 2007 Sewer Master Plan will be included in the update. The existing lift stations needed to be analyzed by the update. Task 3 – Develop Wastewater Flows: Existing sewer base flows can be derived from water billing data. Future flows will be derived from population projections supplemented with future development projects identified and approved by the city. Task 4 – Flow Monitoring: Conduct flow monitoring to obtain dry and wet-weather flow data to be used for model calibration. Conduct additional flow metering to capture potential wet weather flows during wet season. Task 5 – Sewer System Capacity Analysis: The hydraulic model will be used to assess the hydraulic capacity of the sewer system for existing and future flow scenarios. Capacity improvements to resolve capacity deficiencies shall be identified and tested in the model, along with associated costs...
