(a) The City Engineer is hereby directed, prior to final approval of any newly-installed sewer system and/or reconstructed sewer, to require that any and all contractors or developers provide photographs of the entire sewer system installed showing thereby that: the sewer system has been constructed upon a sound engineering basis, it is free of any and all accumulations of foreign substances, is of sound workmanship, and that the passage of, and flow of, sanitary sewage is free and clear. If, in the discretion of the City Engineer, the sewers are large enough for a visual inspection to be made, in lieu of photographs, such a visual inspection shall be made and a report of such inspection submitted to the City as a permanent record.
(b) The City Engineer, upon inspection of such photographs and/or visual inspection reports, if satisfied that: such sewer is free and clear of all foreign substances, is of sound workmanship, and that there is nothing present to prevent free flow of sewage is hereby authorized to approve the same as a final inspection; placing in safekeeping all photographs and/or inspection reports for future reference by the City.
(c) The cost of such photographing, photographs and/or inspection reports shall be paid for entirely by the contractor or developer of such land and/or sewer system, and such photographs and/or inspection reports shall remain the property of the City.
(d) The Mayor and/or the Director of Public Service are hereby authorized to engage the services of any person, firm, or corporation specializing in the televising or photographic inspection of underground sewers whenever, during or immediately after emergencies or storm flooding situations, if in their opinion it is necessary to have any critical areas of the sanitary and/or storm sewer systems of the City inspected.