(A) General.
(1) Private sewers in poor condition due to cracked pipe or joints, leaking joints (infiltration) or root intrusion may be rehabilitated using the pipe-bursting method, if approved in advance by the District. Certain conditions, such as private sewers with insufficient grade, sags or in close proximity to other utilities, may not be suitable for rehabilitation using the pipe-bursting method. This specification is intended for rehabilitation of four-inch or six-inch diameter private sewers only.
(2) Approval of the pipe-bursting method by the District can only be made after reviewing the pre-rehabilitation television inspection tape, which is a required submittal item. Approval of the submittal by the District does not imply that the proposed pipe-bursting installation is appropriate for the specific location being proposed for installation. The contractor is completely responsible for all elements of the pipe-bursting installation, including safety of installation, conflicts or damage to utilities, property improvements, sidewalks, driveways, curbs, gutters, pavement and equipment, or installation problems caused by existing private sewer pipe materials, subsurface conditions or access restrictions.
(B) Description. Pipe-bursting rehabilitation consists of splitting and expanding the existing pipe and simultaneously pulling, or pushing, a new high-density polyethylene (HDPE) pipe into the resulting void. The method requires the excavation of two pits. The insertion pit shall be used to insert the pipe splitting device followed by the new pipe. The exit pit shall be used to receive the splitting device and new pipe through the existing private sewer. After insertion, a cleanout to grade shall be installed at the property line, and the new pipe shall be connected to the existing pipe. (C) Submittals. Minimum pipe-bursting experience requirements include as follows:
(1) The contractor shall have completed a minimum of two pipe-bursting projects within the last two years. Submit short project descriptions and references (name and phone numbers of property owners or construction inspectors) for two projects;
(2) A letter signed by the property owner authorizing the installation of the private sewer using the pipe-bursting method. The letter must also acknowledge that the pipe-bursting procedure and limitations have been explained to the property owner by the contractor; and
(3) The contractor shall inspect the private sewer using a CCTV camera and provide a DVD-format video and inspection report for each private sewer. The video shall show the footage of the camera and shall include the complete length of the private sewer to be replaced. Prior to television inspection, the existing pipe must be clean of all debris, and must be wet so that sags can be easily detected. The television inspection shall be completed in the presence of the District representative. If approved by the Engineer, the television inspection may be completed without a District representative if the inspection video adequately documents the location of the work.
(D) Post-rehabilitation television inspection. The television inspection shall be completed in the presence of the District representative. If approved by Engineer, the television inspection may be completed without a District representative if the inspection video adequately documents the location of the work.
(Ord. 2019-02, passed 4-25-2019)