Monitoring stations (control manholes).

A. All significant industrial users, and other industrial users whose industrial waste discharge has caused or may cause interference or pass-through or a blockage in the sewer system, may be required to install and maintain a suitable monitoring station at the end of their process, on their premises, at their expense, to facilitate the observation, sampling, and measurement of their industrial wastewater discharge.B. Control manholes or sampling sites for categorical industrial users shall be installed at the end of each categorical process prior to any outside dilution, as determined by the Chief Plant Operator and/or Superintendent of Sewers.C.

If there is more than one street lateral serving an industrial user, the Chief Plant Operator and/or Superintendent of Sewers may require the installation of a control manhole on each lateral.D. For categorical industrial users, additional monitoring locations shall be required to access compliance with categorical standards at the end of each categorical process before dilution.E. The Chief Plant Operator and/or Superintendent of Sewers may require that such monitoring station(s) include equipment for the continuous measurement and recording of wastewater flow rate and for the sampling of the wastewater or the atmosphere in the sewer system.

Such station(s) shall be accessible and safely located, and the industrial user shall allow immediate access, without prior notice, to the station by the Chief Plant Operator and/or Superintendent of Sewers or his designated representative.