North Dakota Administrative Code › Title 33.1 - Department of Environmental Quality › Article 33.1-24 - Hazardous Waste Management › Chapter 33.1-24-08 - Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks › Section 33.1-24-08-72 - Additions, exceptions, and alternatives for underground storage tank systems with field-constructed tanks and airport hydrant systems

Current through Supplement No. 393, July, 2024
1. Exception to
				piping secondary containment requirements. Owners and operators may use
				single-walled piping when installing or replacing piping associated with
				underground storage tank systems with field-constructed tanks greater than
				fifty thousand gallons and piping associated with airport hydrant systems.
				Piping associated with underground storage tank systems with field-constructed
				tanks less than or equal to fifty thousand gallons not part of an airport
				hydrant system must meet the secondary containment requirement when installed
				or replaced.
2. Upgrade
				requirements. No later than April 1, 2021, airport hydrant systems and
				underground storage tank systems with field-constructed tanks where
				installation commenced on or before April 1, 2018, must meet the following
				requirements or be permanently closed pursuant to sections
				33.1-24-08-60 through
				33.1-24-08-64.
a. Corrosion protection. Underground storage
				tank system components in contact with the ground that routinely contain
				regulated substances must meet one of the following:
(1) Except as provided in subsection 1, the
				new underground storage tank system performance standards for tanks at
				subsection 1 of section
				33.1-24-08-10 and for piping at
				subsection 2 of section
				33.1-24-08-10; or
(2) Be constructed of metal and cathodically
				protected according to a code of practice developed by a nationally recognized
				association or independent testing laboratory and meets the following:
(a) Cathodic protection must meet the
				requirements of paragraphs 2 through 4 of subdivision b of subsection 1 of
				section 33.1-24-08-10 for tanks, and
				paragraphs 2 through 4 of subdivision b of subsection 2 of section
				33.1-24-08-10 for
				piping.
(b) Tanks greater than ten
				years old without cathodic protection must be assessed to ensure the tank is
				structurally sound and free of corrosion holes prior to adding cathodic
				protection. The assessment must be by internal inspection or another method
				determined by the department to adequately assess the tank for structural
				soundness and corrosion holes.
(NOTE: The following codes of practice may be used to comply
				  with this section: NACE International Standard Practice SP 0285, "External
				  Control of Underground Storage Tank Systems by Cathodic Protection", NACE
				  International Standard Practice SP 0169, "Control of External Corrosion on
				  Underground or Submerged Metallic Piping Systems"; National Leak Prevention
				  Association Standard 631, Chapter C, "Internal Inspection of Steel Tanks for
				  Retrofit of Cathodic Protection"; or American Society for Testing and Materials
				  Standard G158, "Standard Guide for Three Methods of Assessing Buried Steel
				  Tanks".)