South Dakota Administrative Rules › Title 74 - Department of Environment And Natural Resources › Article 74:56 - Storage facilities - Remediation › Chapter 74:56:05 - Remediation criteria for petroleum-contaminated soils › Section 74:56:05:01 - Definitions

Current through Register Vol. 51, page 10, July 15, 2024
Terms defined in SDCL chapters 34A-2 and 34A-12 and ARSD chapters
	 74:54:01, 74:54:02, 74:56:01, and 74:56:03 have the same meaning when used in
	 this chapter unless they are defined otherwise. In addition, terms used in this
	 chapter mean:
(1) "Action levels,"
  numeric values or other performance criteria that are protective of human
  health which, if reached or exceeded, require further assessment or corrective
  action;
(2) "Chemicals of concern,"
  specific constituents that are identified for evaluation in the risk assessment
  process as provided for in §
									74:56:05:04;
(3) "Corrective action," the sequence of
  actions at a petroleum release site that include site assessment, interim
  remedial action, remedial action, operation and maintenance of equipment,
  monitoring of progress, and termination of the remedial action;
(4) "Direct exposure pathway," an exposure
  pathway, as defined in §
									74:56:05:02, whose point of
  exposure is at the source, without a release to any other medium;
(5) "Excavation area," the area containing
  the tank system and backfill material bounded by the ground surface, the walls
  and floor of the pit, and the trenches into which the underground storage tank
  system was placed at the time of installation or two feet around the
  underground storage tank system if the limits of the original excavation cannot
  be determined;
(6) "Exposure,"
  contact of an organism with a chemical of concern;
(7) "Exposure assessment," the estimation,
  qualitative or quantitative, of the magnitude, frequency, and duration of
  exposure to a chemical of concern, and the route of exposure;
(8) "Fate and transport analysis," a study
  conducted to determine the mechanisms and routes by which chemicals of concern
  may enter a specific environment, the specific environments potentially
  affected by the chemicals of concern, and the final disposition and chemical
  form of the chemicals of concern in those environments;
(9) Free phase product," pure petroleum
  product floating on the groundwater;
(10) "Hazard index (HI)," the sum of more
  than one hazard quotient for multiple chemicals of concern or multiple exposure
  pathways;
(11) "Hazard quotient,"
  the ratio of a single chemical exposure level over a specified period of time
  to a reference dose for that chemical derived from a similar exposure
  period;
(12) "Indirect exposure
  pathway," an exposure pathway, as defined in §
									74:56:05:02, with at least one
  intermediate release to any medium between the source and the point or points
  of exposure, i.e., chemicals of concern moving from soil through groundwater to
  the point or points of exposure;
(13) "Middle distillate total petroleum
  hydrocarbons," petroleum products with boiling point ranges from 190° to
  360°C, such as diesel fuels, heating fuels, kerosene, motor oil, waste oil,
  transformer oil, crude oil, aviation fuel, and similar substances;
(14) "Reasonable maximum exposure," the
  highest exposure to a chemical of concern expected to occur at a
  site;
(15) "Receptor," persons,
  structures, utilities, surface water, groundwater, or water supply wells that
  are or may be adversely affected by a petroleum release;
(16) "Reference dose (RfD)," an estimate of
  daily exposure level to a chemical of concern for the human population,
  including sensitive subpopulations, that is likely to be without an appreciable
  risk of deleterious effects during a lifetime;
(17) "Slope factor," an upper-bound estimate
  of the probability of a response per unit intake of a chemical of concern over
  a lifetime, used to estimate an upper-bound probability of an individual
  developing cancer as a result of a lifetime of exposure to a particular level
  of a potential carcinogen;
(18)
  "Volatile," petroleum products with boiling point ranges from 20° to
  190°C, such as gasolines, gasohol aviation gas, jet fuel, and similar
  substances.
General Authority:
SDCL
		34A-2-93,
		34A-2-99,
		34A-2-101,
		34A-12-7.
Law Implemented:
SDCL
		34A-2-98,
		34A-12-1.
Underground storage tanks (UST), ch
		74:56:01.