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13.12.241 – Monitoring Facilities Requirements

  1. Sampling Manhole Requirements
    1. All Users located in areas zoned industrial and/or business park and such other Users as required by the Director of Public Works or designee, except residential users, are required to install a monitoring manhole for each separate discharge in the building sewer in accordance with the plans and specifications approved by the Director of Public Works or designee. 
    2. The sampling manhole shall be located on the sewer connection pipe at a point where there are no changes in grade or alignment for at least 15 pipe diameters upstream and downstream from the manhole.  The grade (slope) of the pipe shall not exceed 1% (1 foot per 100 feet) through the manhole and for a distance of 15 pipe diameters upstream and downstream from the manhole.
    3. There shall be ample room in or near such sampling manhole to allow accurate sampling and preparation of samples for analysis.  The manhole shall be installed and maintained by the owner/User at his sole expense so as to be safe and accessible to the Director of Public Works or designee at all times.  The failure of a User to keep its monitoring facility in good working order shall not be grounds for the User to claim that sample results are unrepresentative of its discharge.
      1. Where such a manhole location would be impractical or cause extreme hardship on the User, the Director of Public Works or designee may concur with the manhole being constructed in the public street or sidewalk area providing that the manhole is located so that it shall not be obstructed by landscaping or parked vehicles.  In those cases where a sampling manhole must be in a parking lot, a permanent barricade, such as a bollard shall be placed around the manhole to prevent vehicles from driving or parking over the manhole cover. 
      2. The Director of Public Works or designee may postpone the installation of the sampling manhole when specific circumstances prevent the installation of a manhole.
      3. A postponement for a sampling manhole will be handled on a case-by-case basis by the Director of Public Works or designee when it is determined that the discharge is solely from a residential source and the site is not in a zoned business park/industrial area.
      4. When a postponement for a sampling manhole installation is granted by the Director of Public Works or designee, an affidavit will be signed by the property owner to install the manhole at a later date should business practices change at the location where the manhole installation was postponed.
  2. Sampling and Flow Measurement Requirements
    1. When in the judgment of the Director of Public Works or designee there exists sufficient volumes and/or quantities of contaminants that may interfere with the performance of the City sewage system, the Director of Public Works or designee may require the owner and/or occupant of any property and/or an Industrial User served by a building sanitary sewer carrying industrial wastes to install composite sampling equipment and/or flow measurement equipment. Said composite sampling and flow measurement equipment shall be installed by the property owner and/or occupant at its expense and shall be maintained by it as to be functional at all times, safe and accessible to the Director of Public Works or designee.
    2. Where nonfunctional or malfunctioning flow measurement equipment exists, the waste generator and/or Industrial User shall notify the Director of Public Works or designee within twenty-four hours of his or her knowledge of the malfunction so appropriate interim measurement arrangements can be made.
(2022-M-43: § 1)
Up to 13.12 – Sewers