When required by the enforcing officer, the owner of any property serviced by a building sewer carrying industrial wastes shall install a suitable 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 enforcing officer. 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.History: Env. Qual. Comm. Regs., efr prior to 1975, § 10.22.