(A) All excavations required for the installation of a building sewer shall be open trench work unless otherwise approved by the Superintendent. Except where bends are supplied, trenches shall be straight in direction and grade to accommodate prefabricated joints. Trenches shall be at least 20 inches wide opposite the centerline of the pipe. Building sanitary sewers laid in undisturbed ground must be laid on at least four inches of pea gravel, sand, or other approved grillage to support the bottom quadrant of the pipe. Building sewers laid in made or filled ground shall be embedded to the lower quadrant, with at least a four-inch concrete pad below the invert or other support that may be considered necessary. Backfill shall be carefully tamped in and around pipe in not over four- inch layers to top of pipe for proper support. Should material or power fail to accomplish 95% complete compaction, grillage shall be substituted to top of pipe. Backfilling shall be solidly tamped up to six inches above the pipe, and hand placed up to 18 inches above the pipe. No backfill shall be placed until the pipe laying has been inspected and approved by the city's representative or the County Health Department.
(B) All excavations for building sewer installations shall be adequately guarded with barricades and lights 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.
(Ord. 132, passed 1-25-74) Penalty, see § 50.999