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flow meter calibration - Requires reporting to the regulators?
Posted: Wednesday, October 17, 2012 5:35 PM
Joined: 4/2/2012
Posts: 4

Our NPDES permit requires that we continuously monitor the flow rate of our treatment plant's influent and effluent wastestreams.   The NPDES standard conditions states that we need to calibrate our meters every six months or more often if required by the manufacturer.  Do anyone of you have similar provisions in your permits and if so, how do you folks address them. I've heard some facilities have redundant flow meters so technically they are always monitoring the folow. If you don't have redundant meters, do you notify your regulatory agencies when the meters are taking offline to conduct the calibration?  how is the situation handled?