South Carolina Code of Regulations › Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL › Subchapter 61-92 - UNDERGROUND STORAGE TANK CONTROL REGULATIONS › Part 280 - TECHNICAL STANDARDS AND CORRECTIVE ACTION REQUIREMENTS FOR OWNERS AND OPERATORS OF UNDERGROUND STORAGE TANKS (UST) › Subpart K - UST SYSTEMS WITH FIELD-CONSTRUCTED TANKS AND AIRPORT HYDRANT FUEL DISTRIBUTION SYSTEMS › Section 61-92.280.K.252 - ADDITIONS, EXCEPTIONS, AND ALTERNATIVES FOR UST SYSTEMS WITH FIELD-CONSTRUCTED TANKS AND AIRPORT HYDRANT SYSTEMS

Current through Register Vol. 48, No. 6, June 28, 2024
(a) Exception to piping secondary containment
				  requirements. Owners and operators may use single walled piping when installing
				  or replacing piping associated with UST systems with field-constructed tanks
				  greater than 50,000 gallons and piping associated with airport hydrant systems.
				  Piping associated with UST systems with field-constructed tanks less than or
				  equal to 50,000 gallons not part of an airport hydrant system must meet the
				  secondary containment requirement when installed or replaced.
(b) Upgrade requirements. Not later than May
				  26, 2020, airport hydrant systems and UST systems with field-constructed tanks
				  where installation commenced on or before May 26, 2017 must meet the following
				  requirements or be permanently closed pursuant to Subpart G of this part.
(1) Corrosion protection. UST system
				  components in contact with the ground that routinely contain regulated
				  substances must meet one of the following:
(i) Except as provided in paragraph (a) of
				  this section, the new UST system performance standards for tanks at Section
				  280.20(a) and for piping at Section 280.20(b); or
(ii) 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 Section 280.20(a)(2)(ii), (iii), and (iv) for tanks, and
				  Sections 280.20(b)(2)(ii), (iii), and (iv) for piping.
(B) Tanks greater than 10 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 to paragraph (b). The following codes of practice may
					 be used to comply with this paragraph (b):
(A) NACE International Standard Practice SP
				  0285, ''External Control of Underground Storage Tank Systems by Cathodic
				  Protection'';
(B) NACE
				  International Standard Practice SP 0169, ''Control of External Corrosion on
				  Underground or Submerged Metallic Piping Systems'';
(C) National Leak Prevention Association
				  Standard 631, Chapter C, ''Internal Inspection of Steel Tanks for Retrofit of
				  Cathodic Protection''; or
(D)
				  American Society for Testing and Materials Standard G158, ''Standard Guide for
				  Three Methods of Assessing Buried Steel Tanks''.]