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 G - OUT-OF-SERVICE UST SYSTEMS AND CLOSURE › Section 61-92.280.G.71 - PERMANENT CLOSURE AND CHANGES-IN-SERVICE

Current through Register Vol. 48, No. 6, June 28, 2024
(a) At least 30 days before beginning either
				  permanent closure or a change-in-service under paragraphs (b) and (c) of this
				  section, or within another reasonable time period determined by the Department,
				  owners and operators must notify the Department in writing of their intent to
				  permanently close or make the change-in-service, unless such action is in
				  response to corrective action. At least 30 days before replacing previously
				  installed piping or previously installed dispensers, owners and operators must
				  notify the Department in writing of their intent. The required assessment of
				  the excavation zone under Section 280.72 must be performed after notifying the
				  Department but before completion of the permanent closure or a
				  change-in-service.
(b) To
				  permanently close a tank, owners and operators must empty and clean it by
				  removing all liquids and accumulated sludges. All tanks taken out of service
				  permanently must be removed from the ground, filled with an inert solid
				  material, or closed in place in a manner approved by the Department.
(c) Continued use of an UST system to store a
				  non-regulated substance is considered a change-in-service. Before a
				  change-in-service, owners and operators must empty and clean the tank by
				  removing all liquid and accumulated sludge and conduct a site assessment in
				  accordance with Section 280.72. A change-in-service also includes switching
				  from a non-regulated substance to a regulated substance.
[Note to Section 280.71. The following cleaning and closure
					 procedures may be used to comply with this section:
(A) American Petroleum Institute Recommended
				  Practice RP 1604, "Closure of Underground Petroleum Storage Tanks";
(B) American Petroleum Institute Standard
				  2015, "Safe Entry and Cleaning of Petroleum Storage Tanks, Planning and
				  Managing Tank Entry From Decommissioning Through Recommissioning";
(C) American Petroleum Institute Recommended
				  Practice 2016, "Guidelines and Procedures for Entering and Cleaning Petroleum
				  Storage Tanks";
(D) American
				  Petroleum Institute Recommended Practice RP 1631, ''Interior Lining and
				  Periodic Inspection of Underground Storage Tanks,'' may be used as guidance for
				  compliance with this section;
(E)
				  National Fire Protection Association Standard 326, ''Standard for the
				  Safeguarding of Tanks and Containers for Entry, Cleaning, or Repair'';
				  and
(F)National Institute for
				  Occupational Safety and Health Publication 80-106, ''Criteria for a Recommended
				  Standard . . . Working in Confined Space'' may be used as guidance for
				  conducting safe closure procedures at some hazardous substance
				  tanks.]