The department of public services shall, prior to final approval of any newly installed sewer system or reconstructed sewer, require all contractors to make an inspection, by closed-circuit television, of the entire sewer system installed, showing thereby that the sewer system has been constructed upon a sound engineering basis, that the sewer system is free of accumulations of foreign substance and nature, that the passage and flow of sewage and storm water is free and clear, and that there are no structural defects. If, in the discretion of the department of public works, the sewers are larger enough for a visual inspection to be made, in lieu of an inspection by closed-circuit television, a visual inspection shall be made, and a report of the inspection shall be submitted to the city.
('69 Code, § 20-94)