Each industry shall be required to install a control manhole, when required by the director of public works and engineering, and the owner of any property serviced by a building sewer carrying industrial wastes shall be required to install a control manhole together with such necessary meters and other appurtenances in the building sewer to facilitate observation, sampling and measurement of the wastes. Such manhole, when required, shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the director of public works and engineering. The manhole shall be installed by the owner at his expense, and shall be maintained by him so as to be safe and accessible at all times. The owner shall install such control manhole within ninety (90) days of the date of written notification to do so. (Ord. 0-13-51, 11-4-2013)