The size, slope, alignment, materials of construction of all sanitary sewers including building sewers, and the methods to be used in excavating, placing of the pipe, jointing, testing, and backfilling the trench, shall conform to the requirements of the building and plumbing code or other applicable rules and regulations of the city.
In the absence of suitable code provisions or in amplification thereof, the materials and procedures set forth in appropriate specifications of the A.S.T.M. and W.P.C.F. Manual of Practice No. 9 shall apply.
(Ord. 360 Art. IV, § 6, 1980).