Section 096-695-7 - Design and Installation Requirements for new and Replacement PipingA.Construction Materials(1) All underground piping, including all piping connectors, shall be constructed of fiberglass, cathodically protected steel or other non-corrosive materials which may be approved by the Department.(2) All piping materials including adhesives must be chemically compatible with the hazardous substance to be stored.(3) All nonmetallic piping shall be approved and constructed in accordance with the standards contained in the following: Underwriters Laboratories (UL) Subject 971, "UL Listed Non-metal Pipe";
Underwriters Laboratories (UL) Standard 567, "Pipe Connectors for Flammable and Combustible and LP Gas";
Underwriters Laboratories of Canada (ULC) Guide ULC-107, "Glass Fiber Reinforced Plastic Pipe and Fittings for Flammable Liquids"; or
Underwriters Laboratories of Canada (ULC) Standard CAN4-S633-M84, "Flexible Underground Hose Connectors".
(4) All cathodically protected steel piping shall be constructed and installed in conformance with the National Association of Corrosion Engineers, Recommended Practices, Publication Number RP-02-85.B. Secondary Containment(1) All underground piping systems for underground hazardous substance storage facilities shall be constructed of double wall piping such that the outer wall completely encloses the inner wall to provide 360 degree double wall protection that will completely contain hazardous substance leaks.(2) A leak detection system for all piping shall be installed in accordance with the requirements of Section 8 and 9 of this rule.C. Installation(1) Underground piping shall be installed in conformance with the requirements contained in Appendix E.(2) Underground piping shall be installed in accordance with manufacturer's instructions and recommendations.(4) Underground piping may only be installed by an underground hazardous substance storage tank installer certified by the Maine Board of Underground Storage Tank Installers (BUSTI) under 32 MRSA §10001 et seq., or by a BUSTI-certified underground oil storage tank installer if supervised on-site by a registered Maine professional engineer with training and experience in underground storage facility installation.D.Relining and ReinstallationUnderground piping-may not be relined or reinstalled.
E.Repair After a Leak(1) Repair of underground piping and metal parts of ancillary equipment shall not be allowed. Piping sections and metal parts of ancillary equipment which leak must be replaced.(2) The entire leaking underground piping system must be replaced if a leak is detected in a piping system which does not conform to the requirements of this regulation.06- 096 C.M.R. ch. 695, § 7