Administrative Rules of Montana › Department 17 - ENVIRONMENTAL QUALITY › Chapter 17.56 - UNDERGROUND STORAGE TANKS PETROLEUM AND CHEMICAL SUBSTANCES › Subchapter 17.56.7 - Out-of-Service UST Systems and Closure › Rule 17.56.702 - PERMANENT CLOSURE AND CHANGES IN SERVICE

Current through Register Vol. 13, July 5, 2024
(1) At least 30 days before beginning either
				permanent closure or a change in service under (2) and (3), the owner or
				operator shall notify the department of their intent to permanently close or
				make the change in service, unless such action is in response to corrective
				action already noticed to the department under subchapter 6. The required
				assessment of the excavation zone under ARM
				17.56.703
				must be performed after notifying the department, but before completion of the
				permanent closure or a change in service.
(2) To permanently close a tank or connected
				piping, the owner or operator shall empty and clean it by removing all liquids
				and accumulated sludges. All tanks or connected piping taken out of service
				permanently must also be either removed from the ground or, when approved by
				the department, filled with an inert solid material.
(3) Continued use of an UST system to store a
				nonregulated substance is considered a change in service. Before a change in
				service, the owner or operator shall empty and clean the UST system by removing
				all liquid, accumulated sludge, and all combustible and flammable vapors and
				conduct a site assessment in accordance with ARM 17.56.703.
(4) The cleaning and closure procedures in
				(5) must be used to comply with this rule.
(5) The department adopts and incorporates by
				reference the version in effect on January 1, 2018, of the following standards,
				specifications, and publications:
(a) American
				Petroleum Institute Recommended Practice 1604, "Closure of Underground
				Petroleum Storage Tanks," (2015), which sets forth closure practices for UST
				systems, a copy of which may be obtained from API Publications Department, 1220
				L Street NW, Washington, DC 20005, (202) 682-8375;
(b) American Petroleum Institute Recommended
				Practice 1631, "Interior Lining and Periodic Inspection of Underground Storage
				Tanks," (2001), which sets forth lining and periodic inspection standards for
				UST tanks, a copy of which may be obtained from API Publications Department,
				1220 L Street NW, Washington, DC 20005, (202) 682-8375;
(c) American Petroleum Institute Standard
				2015, "Safe Entry and Cleaning of Petroleum Storage Tanks, Planning and
				Managing Tank Entry From Decommissioning Through Recommissioning," (2015),
				which sets forth cleaning and entrance standards for UST tanks, a copy of which
				may be obtained from API Publications Department, 1220 L Street NW, Washington,
				DC 20005, (202) 682-8375;
(d) The
				National Institute for Occupational Safety and Health publication No. 80-106,
				"Criteria for a Recommended Standard: Working in Confined Space," (1979), which
				sets forth standards for working inside an UST tank, a copy of which may be
				obtained from the Superintendent of Documents, Government Printing Office,
				Washington, DC 20402, (202) 783-3238;
(e) American Petroleum Institute Recommended
				Practice 2016, "Guidelines and Procedures for Entering and Cleaning Petroleum
				Storage Tanks," (2016), which sets forth entrance and cleaning standards for
				UST tanks, a copy of which may be obtained from API Publications Department,
				1220 L Street NW, Washington, DC 20005, (202) 682-8375; and
(f) National Fire Protection Association
				(NFPA) Standard 326, "Standard for the Safeguarding of Tanks and Containers for
				Entry, Cleaning, or Repair," (2015), which sets forth procedures to safeguard
				tanks or containers that contain or have contained flammable and combustible
				liquids or other hazardous substances before entry, cleaning, repair, or other
				activities can be performed, a copy of which may be obtained from the National
				Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02269, (800)
				344-3555.