Administrative Rules of Montana › Department 17 - ENVIRONMENTAL QUALITY › Chapter 17.56 - UNDERGROUND STORAGE TANKS PETROLEUM AND CHEMICAL SUBSTANCES › Subchapter 17.56.13 - Underground Storage Tank Permitting › Rule 17.56.1301 - DEFINITIONS

Current through Register Vol. 13, July 5, 2024
For the purposes of ARM Title 17, chapter 56, subchapters 13
				  and 14 and unless otherwise provided, the following terms have the meanings
				  given to them in this rule and must be used in conjunction with the definitions
				  in subchapter 1 of this chapter and those in
				  75-11-203
				  and
				  75-11-503,
				  MCA:
(1) "Annual period" means a
				calendar year beginning on March 1 and ending on the last day of February of
				the following year, for the purpose of calculating when fees are due to the
				department.
(2) "Day" means a
				calendar day.
(3) "External leak
				detection device" means a monitoring system that is located external to and not
				attached to an underground storage tank system and that is designed and
				installed to detect a release of the regulated substance stored in the
				underground storage tank system. Examples of external leak detection devices
				include, but are not limited to, soil vapor monitoring wells, observation
				wells, continuous monitoring equipment, if any, that is installed within the
				wells to detect a release, and a groundwater monitoring well when constructed
				by a person holding a monitoring well constructor license issued by the board
				of water well contractors and in accordance with the provisions of ARM Title
				36, chapter 21, and ARM
				17.56.407(1)(f).
(4) "Groundwater monitoring well"
				means a monitoring well constructed by a licensed monitoring well contractor
				and in accordance with the requirements of ARM Title 36, chapter 21, and any
				associated sensing equipment which is located outside of the tank excavation
				and is designed and installed to be used to detect releases of regulated
				substances from underground storage tank systems.
(5) "Installer license" means a license
				issued to an individual by the department under
				75-11-210,
				MCA, to conduct the installation, closure, or both, of underground storage tank
				systems.
(6) "Lining" means the
				addition of a plastic, fiberglass, or other shell of impervious material to the
				inside of an underground storage tank for the purpose of ensuring that the tank
				retains its contents. The term includes all steps to be taken in preparation
				for the addition of the lining and includes relining.
(7) "Major installation" means the
				installation of underground storage tanks, piping, vapor or groundwater leak
				detection monitoring wells, corrosion protection, interstitial tank probes and
				sensors and corrosion protection system anodes. Repair or modification of the
				above-listed items, and activities not defined as a "minor installation" are
				also considered major installations.
(8) "Minor installation" means the
				installation of replacement spill buckets, offset sleeves on tank risers, boots
				on piping flex connectors, drop-tubes, drop-tube shut-off valves and auto
				dialers, and the extension or replacement of vent standpipes. Minor
				installation also includes the decommissioning of groundwater and vapor leak
				detection monitoring wells.
(9)
				"Modification" means a significant change in the structure or components of an
				underground storage tank system, and includes, but is not limited to, lining a
				tank, cutting the walls of a tank, and the addition of internal leak detection
				devices.
(10) "Observation well"
				means, for purposes of this subchapter, a device and sensing equipment, if any,
				which consists of a cased penetration of an underground storage tank's backfill
				from which groundwater and/or soil vapors are monitored to detect whether a
				release of the regulated substance stored in an underground storage tank system
				has occurred, and which is located entirely within an underground storage tank
				system's backfill and does not penetrate beyond the bottom of the tank system's
				backfill.
(11) "Triennial period"
				means a period of three calendar years beginning on March 1 and ending on the
				last day of February three years later for the purpose of calculating
				continuing education units earned by a licensee of the department.
AUTH:
					 75-11-204,
					 75-11-505,
					 MCA; IMP:
					 75-11-204,
					 75-11-209,
					 75-11-210,
					 75-11-212,
					 75-11-509,
					 MCA