No concrete, rubble, building material waste, garbage, or trash shall be used for backfilling of excavations for water, sewer, or gas lines. The material used shall be thoroughly tamped and packed into place so that no settling will take place. The holder of the building permit and the holder of the excavation permit, if an excavation permit is required, shall maintain the surface over the refilled excavation in a smooth condition for a period of six months from the completion of backfilling. No water, sewer, or gas lines shall cross another such line unless the trench for the lower line has been excavated, backfilled, and tamped back to the satisfaction of the Building Inspector.
(Prior Code, § 150.083) Penalty, see § 150.999