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volume, maximum flush pipe length, minimum residual pressure, minimum system <br />pressure, desired number of turnovers, desired flush time, orifice flow coefficient, <br />hydrant nozzle to operate, man power hours per day and private water main flush status. <br />Data Required: Hydrant data (make, model, nozzle sizes and condition), valve data (sizes <br />and condition), privately maintained locations within the City water service area, water <br />service area boundaries and City staff availability. <br />Deliverables: <br />• UDF program design criteria <br />2.2 UDFZones Design — REI will design City UDF zones by reviewing piping and hydraulic <br />flow patterns in the distribution system. REI will develop zone sequences, to identify the <br />flushing hydrant location and valve closures required to flush the zone water distribution <br />mains, on a sequence flushing diagram template. The City will review the sequence <br />flushing diagram template and provide input. In addition, REI will use the Model to <br />determine slow moving water main flow throughout the distribution system which may <br />allow mineral and sediments to deposit and accumulate over time. This investigation will <br />be conducted using the peak hour flow (PHF) scenario and will assist in determining the <br />worse case deposit build-up locations. REI and City staff will select one of the worse <br />case locations for the UDF pilot test. Also, this investigation will help to determine if the <br />City should consider cleaning the system transmission (>12 -inch diameter) mains. <br />Data Required: City staff availability <br />Deliverables: <br />♦ Zone formation map <br />♦ UDF sequence flushing diagram template <br />6 Peak velocity map <br />♦ UDF pilot test location selection meeting <br />2.3 UDF Pilot Test — REI will develop a UDF pilot test plan for the training of flushing <br />crew(s) leaders. The pilot will utilize flushing crews for valve closures and hydrant <br />flushes for the selected zone. A maximum of six (6) sequences will be flushed during the <br />UDF pilot test. The UDF pilot test will demonstrate the UDF program methodology, <br />identify labor requirements, compare field and Model asset locations, and pinpoint the <br />necessary water quality data needed for the UDF program. REI will provide a maximum <br />of one (1) field working day for the UDF pilot test. The UDF pilot test will be a <br />coordinated effort by the City and REI staff. City staff assistance will be scheduled in <br />advance to ensure availability. <br />Data Required: City staff availability <br />Deliverables: <br />♦ UDF pilot test plan <br />• One (1) flushing crew(s) training day <br />6 UDF pilot test location selection meeting <br />3 R .ISS ��•7r�;ii'1'EERI�d�, <br />PLANNING . DESIGN . CONSTRUCTION <br />