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staff. The intent of the plan will be to calibrate only the significant transmission watermains that can be easily hydraulically isolated and where suitable fire hydrants are available to flow. This will be done by selecting various fire hydrants in the water distribution system to serve as flow hydrants and selecting other fire hydrants to serve as pressure hydrants. Due to the unknown availability of suitable fire hydrants and the looping in the distribution system, it may not be possible to calibrate all of the significant transmission watermains. A second focus of the calibration plan will be to observe how the storage tanks and the North Beach Repump Station react during fire flow events. It is assumed most tests will be performed with these tanks and/or repump station hydraulically isolated, but at least one test will be performed with a portion of these tanks/stations operational and connected. The calibration plan will consist of a map identifying up to fifteen (15) hydrants selected to be used and a description of which fire hydrants should serve as flow hydrants to stress the distribution system, and which should serve as pressure hydrants for each test, and a description of how the water plants, elevated storage tanks and North Beach Repump Station should be operated during testing. The available data currently being collected by Hydromax as part of their fire flow testing will be reviewed to determine if the number of flow hydrants can be reduced. The consultant will provide an electronic version of the calibration plan prior to the field testing and will prepare hard copies for the IRCU and Kimley-Horn staff involved in the execution of the calibration plan. Development of the calibration plan will also include up to two (2) meetings with IRCU staff and up to one (1) day of field time to evaluate the appropriate fire hydrants to be flowed. • Consultant will execute the field calibration plan with support of IRCU staff in order to collect pressure and flow data that will be used to calibrate the model. It is assumed that the field calibration will be conducted before the Roseland elevated storage tank is converted to a repump station. During the testing, flows and pressures will be recorded at selected flow and pressure fire hydrants and SCADA information recording the flows, pressures, and water levels from the water treatment plants, ground storage tanks, and North Beach Repump will be documented. It is also understood that several lift stations throughout the distribution system record real time pressure data for the water system. It is assumed that this information can be relied upon as part of the execution of the calibration plan. It is assumed that up to three (3) Kimley-Horn staff members for up to five (5) field days will be required for this task. Effort beyond this amount will be considered additional services and can be performed for an agreed upon fee if needed. • Consultant will assimilate the data recorded during the field testing and use the Darwin Calibrator feature of WaterGEMS to calibrate the existing pipes in the existing hydraulic model prepared under a previous work order. Multiple scenarios will be created in the model to represent the various tests performed in the field and the effect on the hydraulic model. The friction factors of the tested pipes will be adjusted based on the results of the field testing.