Okla. Admin. Code § 165:29-1-11
In addition to the terms defined in 17 O.S. § 303, the following words or terms, when used in this Chapter, shall have the following meaning unless the context clearly indicates otherwise:
"ANSI" means the American National Standards Institute.
"API" means the American Petroleum Institute.
"ASTM" means the American Society for Testing and Materials.
"Aboveground release" means any release to the surface of the land or to surface water. It includes, but is not limited to, releases from the aboveground portion of an underground storage tank system and aboveground releases associated with overfills and transfer operations as the regulated substance moves to or from an underground storage tank system.
"Agent" means a person authorized by another to act on their behalf, either out of employment or contract.
"Aquifer" means a formation that contains sufficient saturated, permeable material to yield significant quantities of water to wells and springs. This implies an ability to store and transmit water for beneficial uses.
"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.
"Backfill" refers to only the material placed in the excavation zone to support the petroleum storage tank system.
"Belowground release" means any release to the subsurface of the land or to groundwater. It includes, but is not limited to, releases from belowground portions of petroleum storage tank systems and belowground releases associated with overfills and transfer operations as the regulated substance moves to or from underground storage tank systems. "Belowground release" does not include releases to a secondary containment system.
"Beneficial uses" means a classification of the waters of the State, according to their best uses in the interest of the public.
"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.
"Chemicals of Concern" or "COC" means chemicals that may pose a threat to human health and the environment.
"Commission" or "OCC" means the Oklahoma Corporation Commission.
"Confirmed Release" means a release of a regulated substance from a regulated storage tank system resulting in free product, contaminated soils or groundwater that exceed state action levels, organic vapor readings significantly above background levels, petroleum staining or odors or any other indication that a release has occurred that could be harmful to human health, safety or the environment and to which a PSTD case number is assigned and further corrective action is required.
"Corrective Action Plan" means any plan submitted to the Division detailing the method and manner of corrective action to be taken for a release.
"Dielectric material" means a material that does not conduct direct electric current. Dielectric coatings are used to electrically isolate underground storage tank systems from the surrounding area. Dielectric bushings are used to electrically isolate portions of the underground storage tank system (e.g., tank from piping).
"EPA" means the United States Environmental Protection Agency.
"Electronic signature" means an electronic signature as defined by OAC 165:5-1-3.
"Environmental experience" means work-related experience in any type of activities associated with soil, water or atmosphere impacted or potentially impacted by a PSTD regulated substance.
"Excavation zone" means the volume containing the underground storage tank system and backfill materials, bounded by the ground surface, walls, and floor of the pit and trenches into which the underground storage tank system is placed at the time of installation.
"Free product" means a regulated substance that is present as a non-aqueous phase liquid (e.g., liquid not dissolved in water).
"Fresh groundwater" means groundwater with total dissolved solids (TDS) less than five thousand (5,000) parts per million.
"Fund" means the Petroleum Storage Tank Release Environmental Cleanup Indemnity Fund.
"Groundwater" means that part of water that is below the water table.
"Hazard Index" means the sum of the Hazard Quotients.
"Hazard Quotient" means the estimated dose, or intake, for a specific chemical and a specific pathway, divided by the Reference Dose (RfD).
"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.
"In service" means a petroleum storage tank that is not abandoned, or could contain regulated substances, and/or has regulated substances regularly added to or withdrawn from it.
"Inventory controls" means techniques used to identify a loss of regulated substances that are based on volumetric measurements in the tank and reconciliation of those measurements with product delivery and withdrawal records.
"Licensed Environmental Consultant" means an individual who has a current license issued by the Petroleum Storage Tank Division to perform corrective action.
"Liquid trap" means sumps, well cellars, and other traps used in association with oil or gas production, gathering, and extraction operations (including gas production plants) to collect oil, water, and other liquids. Liquid traps may temporarily collect liquids for subsequent disposition or reinjection into a production or pipeline stream, or may collect and separate liquids from a gas stream.
"MCL" means Maximum Contaminant Level.
"MtBE" means methyl tertiary butyl ether.
"Monitor well" means a piezometer or other cased and screened excavation, boring or drilled hole installed in any way that can be used for the continuous or periodic evaluation of groundwater quality or the detection of soil vapors.
"NACE" means the National Association of Corrosion Engineers.
"NFPA" means the National Fire Protection Association, Inc.
"Occurrence" means the release of a PSTD regulated substance into the soil or groundwater. Each PSTD regulated substance will be treated as one (1) occurrence regardless of the composition of the substance released. Separate occurrences of the same PSTD regulated substance may be allowed if evidence establishes that the PSTD regulated substance occurred in two (2) different tank systems locations, are separated by time, or both.
"ORBCA" or "Oklahoma Risk-Based Corrective Action" means a scientific risk-based analysis that governs petroleum storage tank site assessment and remediation. It determines acceptable concentration levels of petroleum constituents in order to protect the public health, safety or welfare or the environment.
"Overfill" means a release that occurs when a petroleum storage tank is filled beyond its capacity, resulting in a discharge of regulated substance to the environment.
"PEI" means the Petroleum Equipment Institute.
"POC" means Point of Compliance.
"POE" means Point of Exposure.
"PSI" means pounds per square inch.
"PSTD" means Petroleum Storage Tank Division or Division.
"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.
"Petroleum" means the substances as set forth in 17 O.S. § 303(31). It does not include 100% biodiesel, compressed natural gas, liquid natural gas, methanol, or propane.
"Pipe" or "Piping" means a hollow cylinder or tubular conduit constructed of non-earthen materials.
"Pipeline facilities" means new and existing pipe rights-of-way and any equipment, facilities, or buildings regulated under:
(A) The Natural Gas Pipeline Safety Act of 1968 ( 49 U.S.C. § 1671, et seq.).
(B) The Hazardous Liquid Pipeline Safety Act of 1979 ( 49 U.S.C. § 2001, et seq.).
(C) The State Hazardous Liquid Transportation System Safety Act, § 47.1 et seq. of Title 52 of the Oklahoma Statutes.
(D) Intrastate pipeline facilities regulated under state laws.
"Point of Compliance" means a select location where the concentration of a chemical released must be at or below back-calculated levels. The back-calculated levels are such that estimated concentrations at the Point of Exposure are below health-based levels.
"Point of Exposure" means a location at which an individual or population may be exposed to site-specific Chemicals of Concern through ingestion, inhalation and/or dermal contact.
"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 a release from a petroleum storage tank system may have occurred.
"Potency Factor" means the plausible upper-bound estimate of the probability of a response (cancer) per unit intake of chemical over a lifetime. Also referred to as Slope Factor.
"RBCA" means Risk-Based Corrective Action.
"RfD" means Reference Dose.
"Reasonable Maximum Exposure" or "RME" means the highest rate of exposure that has a small probability five percent (5%) of being exceeded.
"Reference Dose" or "RfD" means the estimate of the daily intake of a chemical over a lifetime that is not likely to result in any significant adverse health effects (including in sensitive subpopulations).
"Regulated substances" 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 or system into the environment or into the interstitial area between the petroleum storage tank system and its secondary barrier.
"Remediation" means a process or technique used to reduce concentration levels of chemicals of concern in the soil and groundwater, and, or to reduce the presence of free product in the environment to levels that are protective of human health, safety and the environment. Generally remediation activities are scheduled after the site assessment is complete and the Remedial Action Plan (RAP) has been approved.
"Repair" means to restore a tank or petroleum storage tank system component to PSTD standards that has caused a release of regulated substances from the petroleum storage tank system.
"Reportable Quantity" or "RQ" means the amount of a PSTD regulated substance release required to be reported to appropriate federal, state, and/or local officials.
"Residual Product" Petroleum hydrocarbons (product) that are absorbed or otherwise bound to geological materials (sand, silt, or clay) in any soil zone (vadose, capillary, or saturated zone), in such a manner that ground water in contact with the residual product or beneath the residual product is not contaminated with any petroleum constituent regulated by the OCC.
"Risk-Based Corrective Action" means all of the activities necessary to manage a site such that concentrations of chemicals from a release are at levels that are not detrimental to public health and the environment. It includes, but is not limited to, collection of site-specific data, analysis of the data to quantify the risk, comparison of the risk with acceptable levels, and implementation of engineering and non-engineering measures to ensure that concentrations of remaining Chemicals of Concern are not detrimental to human health.
"STI" means the Steel Tank Institute.
"Saturated zone" means a subsurface zone below which all pore space is filled with water.
"Site assessment" means a multi-step process designed to determine if a site has possibly been impacted by regulated substance(s) above OCC action levels.
"Slope Factor" means the plausible upper-bound estimate of the probability of a response (cancer) per unit intake of chemical over a lifetime. Also referred to as Potency Factor.
"Soil zone" means and includes, but is not limited to, vadose zone, capillary fringe, or saturated soil zone.
"Source of contamination" means the location of the highest concentration of chemical contaminants in soil and groundwater.
"Source of release" means the location where regulated substances from a regulated tank system entered the environment.
"Spill" means a release that occurs during transfer operations of PSTD regulated substances to or from a petroleum storage tank system, resulting in a discharge of such substances into the environment.
"Suspicion of Release" or "SOR" means preliminary investigative work to determine if a release of a regulated substance has occurred.
"TCLP" means toxicity characteristic leaching procedure, a test procedure for determining if a solid waste is hazardous because it exhibits toxicity characteristics as enforced under Resource Conservation and Recovery Act.
"TDS" means Total Dissolved Solids.
"TPH" means Total Petroleum Hydrocarbon(s).
"Target Risk Level" means the level set by the Oklahoma Corporation Commission that must be achieved at each site prior to a risk-based closure of the site. For example, for current receptors this level has been set at one in a million (1E-06) and a Hazard Quotient of less than one (1.0).
"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.
"UL" means Underwriter's Laboratory.
"Unsaturated zone" or "vadose zone" means the subsurface zone containing water under pressure less than that of the atmosphere, including water held by capillary forces within the soil, and containing air or gases generally under atmospheric pressure. This zone is limited by the ground surface and the upper surfaces of the water table.
Okla. Admin. Code § 165:29-1-11