Upon application of a user, and upon a finding by the Director of Public Works that
a significant portion of freshwater or non-wastewater, received by the user from any
metered source does not flow into the sewerage facilities because of the principal
activity of the user, or by reason of removal of wastewater by other means, the Director
of Public Works may authorize determination of the volume of wastewater discharge
to be made by an appropriate metering device. Upon such determination by the Director
of Public Works, a metering device, of a type approved by the Director of Public Works,
and at a location approved by the Director of Public Works, shall be installed at
the user's expense. Such metering device shall measure either the amount of wastewater
discharged into the sewerage facilities, or the amount of freshwater or non-wastewater
diverted from the sewerage facilities. Upon installation, such meters shall be maintained
and tested periodically for accuracy in accordance with requirements established by
the Director of Public Works, all of which maintenance and testing shall be at the
expense of the user.