Okla. Admin. Code § 165:26-1-2
In addition to the terms defined in 17 O.S. §§ 301 et seq., the following words or terms, when used in this Chapter, shall have the following meaning unless the context clearly indicates otherwise:
"Aboveground storage tank" or "AST" means a "Storage tank" as defined in 17 O.S. § 303(40) that has more than ninety percent (90%) of its volume above the surface of the ground.
"Aboveground storage tank system" means a closed-plumbed system including, but not limited to, the aboveground storage tank(s), the individual storage tank compartments, the lines, the dispenser for a given product, containment sump, if any, ancillary equipment or a delivery truck that is connected to the storage tank system.
"Agent" means a person authorized by another to act on their behalf, either out of employment or contract.
"Airports" mean landing facilities for aircraft which are routinely available for public use (whether routinely used or not). Airports as used in this Chapter do not include private airstrips or private airports.
"Ancillary equipment" means any device including, but not limited to: devices, such as piping, fittings, flanges, valves, and pumps that are used to distribute, meter, or control the flow of regulated substances to or from a petroleum storage tank.
"ATG" means automatic tank gauging.
"Backfill" is the material that is placed in piping excavation to support and separate the piping from the natural environment.
"BTEX" means benzene, toluene, ethylbenzene and xylene.
"Bulk plant" means petroleum storage tank facility where regulated substances are received by tank vessels, pipelines, tank cars, or tank vehicles and are stored or blended in mass quantities or bulk for the purpose of distributing them by a tank vessel, pipeline, tank car, tank vehicle, portable tank or other container, for wholesale or retail sale. "Cathodic protection" means a technique designed to prevent the corrosion of a metal surface by making that surface the cathode of an electrochemical cell. For example, protection can be accomplished with an impressed current system or a galvanic anode system
"Change in service" means a change in the status of a storage tank (i.e., from currently in use to temporarily out of use); or change of regulated substance that a storage tank contains.
"Commission" or "OCC" means the Oklahoma Corporation Commission.
"Compatible" means the ability of two (2) or more substances to maintain their respective physical properties upon contact with one another for the design life of the PST system under conditions likely to be encountered in the system.
"Corrosion expert" means an individual having the requisite knowledge, experience, certification, and training to design and install corrosion protection systems.
"Emergency venting" means a construction method or device that relieves excessive internal pressure due to fire exposure.
"EPA" means the United States Environmental Protection Agency.
"Electronic signature" means an electronic signature as defined in OAC 165:5-1-3.
"Farm tank" is a tank located on a tract of land devoted to the production of crops or raising animals, including fish, and associated residences and improvements. A farm tank must be located on the farm property. "Farm" includes but is not limited to fish hatcheries, rangeland, and nurseries with growing operations.
"Fire protected tank" means an aboveground storage tank that is listed in accordance with UL 2085, Standard for Insulated Aboveground Tanks for Flammable and Combustible Liquids, or an equivalent test procedure that consists of a primary tank provided with protection from physical damage and fire-resistive protection from exposure to a high-intensity liquid pool fire.
"Fire resistant tank" means a UL listed aboveground storage tank that provides fire-resistant protection from exposures to a high intensity liquid pool fire.
"Fleet and Commercial" means any facility that uses aboveground storage tanks to store regulated substances for use in its own vehicles or equipment.
"Flow-through process tank" means a tank that forms an integral part of a production process through which there is a steady, variable, recurring or intermittent flow of material during the operation of the process. Flow-through process tanks do not include tanks used for the storage of materials prior to their introduction to the process or for the storage of finished products or by-products from the production process.
"Formal Enforcement Action" means the process of ensuring compliance with Commission regulations, rules, orders, requirements, standards, and/or state law when a violation occurs and PSTD initiates an enforcement Complaint under the contempt procedure in OAC 165:5 Subchapter 19 to be heard at the Commission by an Administrative Law Judge or the Commissioners.
"Impervious barrier" means a barrier of sufficient thickness, density, and composition that is impenetrable to the regulated substance, has a permeability of at least 1 X 10-6 cm/sec., and will prevent the discharge to the environment of any regulated substance for a period of at least as long as the maximum anticipated time during which the regulated substance will be in contact with the impervious material.
"Important building" means a building that is considered not expendable in an exposure fire.
"In service" means a petroleum storage tank that contains a regulated substance, and/or has a regulated substance added to or withdrawn from it.
"Licensed Environmental Consultant" means an individual who has a current license issued by PSTD to perform corrective action.
"Maintenance" means the normal operational upkeep necessary to prevent a petroleum storage tank system from releasing product.
"Marina" means any fuel storage tank system located on or by the water for the purpose of fueling watercraft.
"Mobile or Temporary Tank at Construction Site" means a fuel tank used for less than twelve (12) months at a construction site.
"OCC Licensed Tester" or "licensed tester" means an individual who has a current license issued by PSTD to perform tank system testing.
"Operator" means any person in control of or having responsibility for the daily operation of the storage tank system, whether by lease, contract, or other form of agreement. The term "operator" also includes a past operator at the time of a release, tank closure, violation of the Oklahoma Petroleum Storage Tank Consolidation Act, or a rule promulgated thereunder, or a requirement of the Commission. In the case of a storage tank system in service/use before November 8, 1984, but no longer in service/use on that date, the last person to operate the storage tank system immediately before the discontinuation of its service/use.
"Owner" means any person as set forth in 17 O.S. § 303(27), including the real property owner where the storage tank system is still present, the storage tank system presence is a trade fixture or improvement or both. It is not necessary that the real property owner sold, used, or stored regulated substances in, of, or from the storage tank system. However, a real property owner who has a storage tank system located on their property that was taken out of service/use prior to November 8, 1984, is not considered to be a storage tank owner for any PSTD regulated purpose.
"Permanent out of use" or "POU" means a petroleum storage tank system that is not in service/use, does not contain regulated substances, and is not intended to be placed back in service/use.
"Pier" means dock, floating dock, and wharf.
"Positive sampling, testing, or monitoring results" means the results of sampling, testing or monitoring using any of the release detection methods described in this Chapter that indicate that a release from a petroleum storage tank system may have occurred.
"Private airport" means an airport used only by its owner and regulated as a fleet and commercial facility.
"Private airstrip" means a personal residential takeoff and landing facility attached to the airstrip owner's residential property and used only by the owner.
"PSTD" means Petroleum Storage Tank Division.
"Public Utility" means any entity providing gas, electricity, water, or telecommunication services for public use.
"Regulated substance" means antifreeze, motor oil, motor fuel, gasoline, kerosene, diesel or aviation fuel as set forth in 17 O.S. § 305. It does not include compressed natural gas, liquid natural gas or propane.
"Release detection" means the methodology used in determining whether a release of regulated substances has occurred from a petroleum storage tank system into the environment or into the interstitial area between the storage tank system and its secondary barrier.
"Residential tank" is a tank located on real property used primarily for dwelling purposes.
"Retail facility" means a service station, convenience store or any other facility selling a PSTD regulated substance that is open to the general public.
"Sacrificial anode" means a device to reduce or prevent corrosion of a metal in an electrolyte by galvanic coupling to a more anodic metal.
"Secondary containment" means a system installed around a petroleum storage tank or system that is designed to prevent a release from migrating beyond the secondary containment system outer wall (in the case of a double-walled tank system) or excavation area (in the case of a liner or vault system) before the release can be detected. Such a system may include, but is not limited to, impervious barriers (both natural and synthetic), double walls, or vaults.
"TPH" means total petroleum hydrocarbons.
"Tampering" means willful intention in an attempt to deceive, cheat or misrepresent facts to the public. Tampering also presents a risk to the environment as well as public health, safety, and welfare.
"Tank tightness testing" or "precision testing" means a procedure for testing a petroleum storage tank system's integrity.
"Temporary out of use" or "TOU" means the status of a petroleum storage tank system that has been taken out of service/use with the intent to permanently close or return to service.
"Total venting capacity" means the sum of the normal and emergency vent capacities and is determined by the wetted area of the tank as provided in Appendix I.
"Used Motor Oil" is any spent motor oil removed from a motor vehicle.
"Vault" means an enclosure consisting of four (4) walls, a floor, and a top for the purpose of containing a liquid storage tank and not intended to be occupied by personnel other than for inspection, repair, or maintenance of the vault, the storage tank or related equipment.
"Wetted area of cylindrical tank" means seventy-five percent (75%) of the total exposed area of the tank ends and shell.
"Wetted area of rectangular tank" means one hundred percent (100%) of the surface area of the bottom, sides, and ends of the tank.
"Wetted area of vertical tank" means the first thirty feet (30') above grade of the exposed shell and floor.
Okla. Admin. Code § 165:26-1-2