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s } f f type of systems, which enables the larger (typically) valve to actuate only in the event of a downstream pressure drop below the smaller valve's setting. Quality Assurance Steps: IDM will perform a review of db tables to ensure that data sets and scenarios have been populated accurately as per the initial table and model notebook development. IDM will then run simulations for the full 24 -hour EPS to evaluate convergence abilities, and apply Range Reports and Graphs to determine pressure, pump flow and tank level ranges preliminarily. Where convergence is an issue, IDM will evaluate the hydraulic notepad report generated by WaterGEMS and consider take appropriate action to achieve convergence and stability. Hydraulic parameters may be adjusted within an acceptable tolerance, input errors may be found, and control set points may be redefined as part of this process. After resolving hydraulic issues, hydraulic model software parameters may also be applied to assist with convergence, such as simulation option relaxation factors and /or damping limits. IDM offers extensive experience in the prudent application of these advanced modeling software parameters. Plant & Calibrate; This stage of the projects prepares plans for both Steady State and Extended Period Simulation Calibrations, then calibrates to project goals and tolerances. 2. Implementation Plan typically applied for planning simulations, while EPS calibrations are used for energy and water quality evaluations. Both hydrant tests require City time, resources, and equipment, and therefore it is important to develop a Hydrant Testing Plan for efficiency, while also minimizing liability when in the field. This Plan will assist the City in identifying data, system, hardware, and staffing resources required to support the process. Factors considered in this Plan include but are not limited to: • Day, time and frequency of hydrant tests • Number and location of data points • Equipment required, such as walkie - talkies, clip boards, data loggers, flow diffusers • Specific instructions re: nozzle used, location of hydrant, directions, etc. • Specific data needed from SCADA, including format, interval, and duration • Expectations of the calibration and validation relative to pressure, flows, tank level tolerances • Varying boundary conditions considered for validation and expected calibration tolerances Hydrant Testing Map (See next page) IDM has reviewed the City's GIS Layer and developed a preliminary hydrant testing plan with the following considerations: • High Leak Areas • Pipeline Material, specifically Cast Iron pipe N To .IDIV ODELING We can be more, together. 12