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c) Pitot tube testing shall be conducted at a flow rate representing the typical flow for the <br />meter (and, if operationally possible, at three different flows ranging from a minimum to <br />near maximum capacity flow). <br />d) The metering consultant shall perform the meter testing and calibration procedures <br />utilizing the meter characteristic curves (for example, the pressure drop vs. flow for a <br />Venturi meter) that have been obtained during previous meter calibration and <br />maintenance work. <br />e) During each quarerly site visit, the metering consultant shall tnspect, assess and <br />document the condition of all metering equipment, including meter, gauges, indicators, <br />recorders, transmitters and other instrumentation, used in the measurement and recording <br />offlow rates and cumulative flow totals and shall document all operational problems with. <br />the calibration instruments and meters during the calibration process. Problems may <br />include air entrainment, leakage, flow disturbance and unstable meter readings. <br />f) Prior to each quarterly site visit, the metering consultant shall review prior calibration <br />records and reports for each meter to determine if previously-identified errors or <br />equipment deficiencies were corrected as previously recommended. <br />g) Each quarter, the metering consultant shall submit a final report (See Section 6) <br />containing all of the calibration results for each meter tested and calibrated during the <br />quarter. The metering consultant's report shall include a narrative description of the <br />work conducted on each meter and meter calibration reports for the individual metering <br />equipment. The quarterly report shall also address deficiencies that were not previously <br />corrected according to the recommendations made in the prior report. <br />5. Calibration Instruments <br />The instrument used for flow testing of the primary meter (Venturi) must meet the <br />accuracy standards required by the American Water Works Association (AWWA), and be <br />20 <br />March i i, 2009