§ 51.070  MONITORING FACILITIES.
   (A)   The city shall require to be provided and operated at the user's own expense, monitoring facilities to allow inspection, sampling, and flow measurement of the building sewer or internal drainage systems.  Where required by federal or state regulations, such monitoring facilities shall be provided at the end of a process wherein incompatible pollutants are used, produced, or treated.  The monitoring facility will normally be situated on the user's premises but the city may, when such a location would be impractical or cause undue hardship to the user, allow the facility to be constructed in the public street or sidewalk area and located so that it will not be obstructed by landscaping, parked vehicles, or other activities of the user.
   (B)   Whenever required by city, the owner or any property serviced by a building-sewer carrying nonresidential wastewater shall install a large manhole or sampling chamber for each separate discharge in the building-sewer in accordance with plans and specifications approved by the Superintendent, installed and maintained at all times at user's expense, which shall have ample room in each sampling chamber to permit the city to take accurate composite samples for analysis.  The chamber shall be safely, easily and independently accessible to authorized representatives of the city during the user's normal production hours.
      (1)   Each sampling chamber shall contain a flow monitoring device approved by the city with a recording and totalizing register for measurement of the liquid quantity; or at the discretion of the city the metered water supply to the industrial plant may be used as the liquid quantity where it is substantiated by the user that the metered water supply and waste quantities are approximately the same, or where a measurable adjustment agreed to by the city is made in the metered water supply to determine the liquid waste quantity.
      (2)   When required, samples shall be taken every hour or half hour, as determined by the city and properly refrigerated and preserved in accordance with Standard Methods and shall be composited in proportion to the flow for a representative 24-hour sample.  Such sampling shall be done as prescribed by the city.
      (3)   The frequency of sampling, sampling chamber, metering device, sampling methods and analyses of samples shall be subject, at any time, to inspection and verification by the city.
   (C)   All measurements, tests, and analyses of the characteristics of water and wastes to which reference is made in this section shall be determined in accordance with Standard Methods.
(Ord. 1984-35, passed 12-18-84)