(a) Trenchless technologies that may be used for installation of new collection system pipe include impact moling, pipe ramming, microtunneling, conventional tunneling, bore and jack, and horizontal directional drilling.
(b) Trenchless technologies that may be used for replacement of collection system pipe include pipe bursting, pipe splitting, and pipe jacking.
(c) Trenchless technologies that may be used for lining existing collection system pipes include epoxy spray lining, cured-in-place pipe, and sliplining. These technologies reduce the inside diameter of a pipe.
(d) All other trenchless methods of installing, replacing, or repairing collection system pipe are non-conforming technologies subject to the requirements of §217.7(b) of this title (relating to Types of Plans and Specifications Approvals).
(e) A collection system using a trenchless technology must be designed, installed, operated, maintained, and constructed in accordance with American Society for Testing and Materials (ASTM) or American Water Works Association (AWWA) standards with reference to materials used and construction procedures. In the absence of ASTM or AWWA standards, the executive director review may be based upon other recognized standards used by industry engineers.
(f) The engineering report must include the following:
  (1) the trenchless method;
  (2) the type of pipe;
  (3) the type(s) of soil;
  (4) the pipe length and diameter;
  (5) the pipe slope;
  (6) the method for disconnecting and reconnecting lateral and service connections;
  (7) the provisions for flow bypass for existing system; and
  (8) the pipe standard.
(g) Collection system pipe that is installed using a trenchless technology is subject to the testing requirements in §217.57 of this title (relating to Testing Requirements for Installation of Gravity Collection System Pipes) and §217.68 of this title (relating to Force Main Testing).

Source Note: The provisions of this §217.56 adopted to be effective August 28, 2008, 33 TexReg 6843; amended to be effective December 4, 2015, 40 TexReg 8254