(a) Industrial users who shall provide pretreatment of wastewaters as a result of any Federal, State or Local regulation, industrial users who are being surcharged for extra-strength wastewaters or any industrial user designated by the City shall be required to provide and operate, at the user's own expense, monitoring facilities to allow inspection, sampling and flow measurement of the building sewer(s) which connect to the POTW. The requirement of flow-measurement devices shall be determined on a case-by-case basis by the City. Monitoring facilities shall be situated on the discharger's premises, unless so specified by the City, and shall be constructed and maintained in accordance with local construction standards and specifications.
(b) When required by the City, the owner of any property served by a building sewer carrying industrial wastes shall install suitable facilities together with such necessary meters and other appurtenances in the building sewer to facilitate observation, sampling, control and measurement of the wastes. Such manholes, when required, shall be easily accessible to the Authority and safely located. The manholes, necessary meters and appurtenances shall be installed by the owner at his expense, and shall be maintained by him so as to be safe and accessible and in proper operating condition at all times. Regardless of whether or not monitoring facilities are required by the City, the owner shall provide convenient access to all sampling points deemed necessary by the City such that independent sampling can be carried out by the City.