[Code 1979, § 2.51]
A separate and independent building sewer shall be provided for every building except where one building stands at the rear of another on an interior lot and no private sewer is available or can be constructed to the rear building through an adjoining alley, courtyard or driveway, the building sewer from the front building may be extended to the rear building and the whole considered as one building sewer, but the City does not and will not assume any responsibility or obligation for drainage caused by or resulting from any such single connection.
[Code 1979, § 2.52]
(a) 
Prior to the demolition of any building or facility containing a building sewer connection to a public sewer, the building sewer connection shall be abandoned and plugged in accordance with procedures and specifications set forth by the director.
(b) 
Abandoned building sewers may be used in connection with new buildings only when they are found, on examination and test by the director, to meet all requirements of this article.
[Code 1979, § 2.53]
(a) 
The size, slope, alignment, materials of construction of a building sewer and the methods to be used in excavating, connecting to the public sewer, placing of the pipe, jointing, testing and backfilling the trench shall all conform to the requirements of the building and plumbing code or other applicable rules and regulations of the City. In the absence of Code provisions or in the application thereof, the materials and procedures set forth in appropriate specifications of the A.S.T.M. and W.P.C.F. Manual of Practice 9 shall apply.
(b) 
The building sanitary sewer and connection to the public sewer shall be reasonably gastight and watertight to prevent infiltration or inflow of surface water or groundwater and exfiltration of sewage. The director shall establish standards and testing requirements for infiltration/exfiltration in accordance with good engineering practice. The director may require such tests on any building sewer prior to approval and commencement of service.
[Code 1979, § 2.54]
Whenever possible, the building sewer shall be brought to the building at an elevation below the basement floor. In all buildings in which any building drain is too low to permit gravity flow to the public sewer sanitary sewage as carried by such building drain shall be lifted by an approved means and discharged to the building sewer.
[Code 1979, § 2.55]
The applicant for a building sewer connection or abandonment permit shall notify the director when the building sewer connection to or abandonment from the public sewer is ready for inspection. All connections and abandonments shall be made under the supervision of the director.
[Code 1979, § 2.56]
All excavations for building sewer installation or abandonment shall be adequately guarded and lighted so as to protect the public from hazard. Streets, sidewalks, parkways and other public property disturbed in the course of the work shall be restored in a manner satisfactory to the City and in accordance with Chapter 70.
[Code 1979, § 2.57]
The building sewer, including that portion in the public right-of-way, shall be maintained, repaired and replaced as required by the owner at no cost to the City.