(A) All excavations required for the installation of a building sewer shall be open trench work unless otherwise approved by the Director. Pipe laying and backfill shall be performed in accordance with District standards. No backfill shall be placed at the connection of the building sewer to the public sewer and at the connection of the building sewer and building drain until after work has been inspected and passed by the Director or his or her representatives.
(B) No stone, brick and so forth, shall be used in the backfill until a minimum depth of at least 18 inches of fine earth or gravel has been placed over the pipe. If blasting of rock is required in excavating, utmost precaution shall be used and suitable cover such as mats, timbers, brush and so forth, shall be provided to cover the immediate blast area so that life and property in the vicinity will not be jeopardized.
(Prior Code, § 50.33)