6 Colo. Code Regs. § 1007-1-16.2
As used in this part, these terms have the definitions set forth as follows.
"Energy compensation source" (ECS) means a small sealed source, with an activity not exceeding 3.7 MBq (100 microcuries), used within a logging tool, or other tool components, to provide a reference standard to maintain the tool's calibration when in use.
"Field station" means a facility where radioactive sources may be stored or used and from which equipment is dispatched to temporary jobsites.
"Injection tool" means a device used for controlled subsurface injection of radioactive tracer material.
"Irretrievable well-logging source" means any sealed source containing licensed material that is pulled off or not connected to the wireline that suspends the source in the well and for which all reasonable effort at recovery has been expended.
"Logging assistant" means any individual who, under the personal supervision of a logging supervisor, handles sealed sources or tracers that are not in logging tools or shipping containers or who performs surveys required by 16.22.
"Logging supervisor" means an individual who uses sources of radiation or provides personal supervision in the use of sources of radiation at a temporary jobsite and who is responsible to the licensee for assuring compliance with the requirements of the Department's regulations and the conditions of the license.
"Logging tool" means a device used subsurface to perform well-logging.
"Mineral logging" means any logging performed for the purpose of mineral exploration other than oil or gas.
"Personal supervision" means guidance and instruction by the logging supervisor who is physically present at the jobsite and watching the performance of the operation in such proximity that contact can be maintained and immediate assistance given as required.
"Radioactive marker" means radioactive material placed subsurface or on a structure intended for subsurface use for the purpose of depth determination or direction orientation. For purposes of this part, this term includes radioactive collar markers and radioactive iron nails.
"Safety review" means a periodic review provided by the licensee for its employees on radiation safety aspects of well-logging, with opportunities for employees to ask safety questions. The review shall include, as appropriate, the results of internal inspections, new procedures or equipment, and accidents or errors that have been observed.
"Source holder" means a housing or assembly into which a radioactive source is placed for the purpose of facilitating the handling and use of the source in well-logging operations.
"Subsurface tracer study" means the release of a substance tagged with radioactive material for the purpose of tracing the movement or position of the tagged substance in the well-bore or adjacent formation.
"Surface casing for protecting fresh water aquifers" means a pipe or tube used as a lining in a well to isolate fresh water aquifers from the well.
"Temporary jobsite" means a location where radioactive materials are present for the purpose of performing well logging or subsurface tracer studies.
"Tritium neutron generator target source" means a tritium source used within a neutron generator tube to produce neutrons for use in well-logging applications.
"Uranium sinker bar" means a weight containing depleted uranium used to pull a logging tool down toward the bottom of a well.
"Well" means a drilled hole in which well logging and subsurface tracer studies are performed. As used in this part, "well" includes drilled holes for the purpose of oil, gas, mineral, groundwater, or geological exploration.
"Well-logging" means all operations involving the lowering and raising of measuring devices or tools which may contain sources of radiation or are used to detect radioactive materials in wells or cavities for the purpose of obtaining information about the well or adjacent formations which may be used in oil, gas, mineral, groundwater, or geological exploration.
"Wireline" means a cable which may or may not contain electrical conductors which is used to lower and raise logging tools in the well.
"Wireline service operation" means any evaluation or mechanical service which is performed in the well using devices on a wireline.
6 CCR 1007-1-16.2