Environment terminology · MLC-0121

Environment terms: R (1,610)

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• ReddNest made in gravel, consisting of a depression hydraulically dug by a fish for egg deposition (and then...
• Redemption program1. Refers to a program where consumers are monetarily compensated for the collection of recyclable materials...
• RedevelopmentRenovation for reuse of a contaminated or blighted site
• Redevelopment jobs leveragedThe total number of redevelopment jobs leveraged by the U.S. EPA cooperative agreement at the property. This...
• Redevelopment Readiness CertificationOlder communities that have lost people and jobs can increase the likelihood of redevelopment by updating...
• RedoxA chemical reaction consisting of an oxidation reaction in which a substance loses or donates electrons, and...
• Redox coenzymesCoenzymes involved in oxidation-reduction reactions
• Redox potentialThe measure of the tendency of a chemical substance to acquire or lose electrons. Redox potential is measured...
• Red-SulphurThe Red River Basin below Denison Dam to and including the Bayou Rigolette Basin at the point of highest...
• Reduced emissions completionWell completion following fracturing or refracturing where gas flowback that is otherwise vented is captured...
• Reduced risk pesticideFIFRA section 3(c) (10) provides for expediting the review of certain types of applications for registration...
• Reduced risk pesticides, see Reduced risk pesticide
• Reduced sulfur compounds1. Hydrogen sulfide (H2S), carbonyl sulfide (COS) and carbon disulfide (CS2).
• Reduced tillageReducing soil disturbance during planting operations, resulting in greater amounts of plant residues on the...
• Reduced utilizationA reduction, during any calendar year in Phase I, in the heat input (expressed in mmBtu for the calendar...
• Reducible uncertainty1. Uncertainty in models that can be minimized or even eliminated with further study and additional data. See...
• Reducing agentAny substance, such as base metal (iron) or the sulfide ion (S2-), that will readily donate (give up)...
• Reducing salt bath descalingRemoval of scale from semi-finished steel products by the action of molten salt baths containing sodium...
• Reduction1. The addition of hydrogen, removal of oxygen, or addition of electrons to an element or compound.
• Reduction control system1. Emission control system which reduces emissions from sulfur recovery plants by converting these emissions...
• Reduction ratioIn microform records, the relationship between the size of a document and the size of a microimage. Usually...
• Reductive dechlorinationRemoval of chlorine and chemical replacement with hydrogen or hydroxide ions to detoxify a substance.
• Redundancy1. Spare assets that have the ability to do the same job, if a failure of the primary asset were to occur.
• Redundant abatement systemSystem that is specifically designed, installed and operated for the purpose of destroying fluorinated GHGs...
• Redundant sensorSecond sensor or a back-up sensor that is integrated into a CPMS and is used to check the parameter value...
• Redundant textInformation that repeats from page to page on a Web site.
• Red-WashitaThe Red River Basin above Denison Dam, excluding the North Fork Red River, Prairie Dog Town Fork Red River...
• ReefsSkeleton-like ecosystems made up of colonies of limestone-producing, living animals. Coral reefs tell us...
• Reel-to-reel electrolytic platingAn electrolytic process in which a continuous metal strip or other type of continuous substrate is fed into...
• Re-EntrainmentSituation that occurs when the air being exhausted from a building is immediately brought back into the...
• Re-entry1. (In indoor air program) Refers to air exhausted from a building that is immediately brought back into the...
• Re-entry groutingA grouting method that requires re-entering the probe hole with special DP rods or tremie pipe for grouting...
• Reentry intervalThe period of time immediately following the application of a pesticide during which unprotected workers...
• Re-Establishment1. Manipulation of the physical, chemical, or biological characteristics of a site with the goal of returning...
• Reference1. A physical or chemical quantity whose value is known exactly, and thus is used to calibrate or standardize...
• Reference aquatic resourceSet of aquatic resources that represent the full range of variability exhibited by a regional class of...
• Reference areasOften incorrectly referred to as a control, this is a comparatively uncontaminated site used for comparison...
• Reference concentration1. An estimate (with uncertainty spanning perhaps an order of magnitude) of a continuous inhalation exposure...
• Reference condition1. A state of being governed primarily by natural environmental processes and subject to minimal human...
• Reference dose1. An estimate (with uncertainty spanning perhaps an order of magnitude) of a daily oral exposure to the...
• Reference files systemAn OPP database that provides data on pesticide active ingredients, registrants, and products (including...
• Reference flowQuantity of outputs from processes in a given product system required to fulfill the function expressed by...
• Reference geometric factorNon-dimensional number derived from a two-dimensional projection of the fuselage.
• Reference libraryRegistry of IT documents such as best practices, lessons learned and others.
• Reference material1. A material or substance, one or more properties of which are sufficiently well established to be used for...
• Reference method1. Any method of sampling and analyzing for an air pollutant as specified in the applicable subpart.
• Reference signalKnown concentration of a calibration gas, the known value of an electronic calibration signal, or the known...
• Reference site1. A relatively uncontaminated site used for comparison to contaminated sites in environmental monitoring...
• Reference sites, see Reference site
• Reference soil conditionThe condition of the soil to which functional capacity is compared. . Soil quality is usually assessed by...
• Reference substance1. Any chemical substance or mixture, or analytical standard, or material other than a test substance, feed...
• Reference value1. An estimate of an exposure for a given duration to the human population (including susceptible subgroups)...
• Referenced external filesThe ASCII files referenced in the NCD tables. These files must be included in a submission of the NCD dataset.
• Referring agencyFederal agency that has referred any matter to the Council (CEQ) after a determination that the matter is...
• Refillable containerContainer that is intended to be filled with pesticide more than once for sale or distribution.
• RefillerPerson who engages in the activity of repackaging pesticide product into refillable containers. This could...
• Refilling establishmentEstablishment where the activity of repackaging pesticide product into refillable containers occurs.
• RefineTo remove impurities.
• Refined exposure concentrationAn estimate of exposure concentration that has been refined, usually by application of an exposure model, to...
• RefinementRefining research methods to minimize pain and suffering.
• RefinerAny person who owns, leases, operates, controls, or supervises a refinery.
• Refinery1. Any facility, including but not limited to, a plant, tanker truck, or vessel where gasoline or diesel fuel...
• Refinery process unitAny segment of the petroleum refinery in which a specific processing operation is conducted.
• Refinery scrubberAuxiliary air pollution control device which removes pollutants from refinery emissions.
• Refinery separatorContainer in which the liquids comprising the refinery fluid stream are separated.
• Refining1. A high temperature process in which impure metal is reacted with flux to reduce the impurities. The metal...
• Refining and casting areaAny area of a primary lead processor in which drossing or refining operations occur, or casting operations...
• Refining kettleOpen-top vessel that is constructed of cast iron or steel and is indirectly heated from below and contains...
• ReflagTo register as a U.S. vessel any vessel that previously had a foreign registry or had been placed into...
• Reflection coefficientA term used in seismic reflection and GPR to describe the ratio of the reflected to incident amplitudes of a...
• ReflectivityThe ability of a surface material to reflect sunlight including the visible, infrared, and ultraviolet...
• Reforestation1. Planting of forests on lands that have previously contained forests but that have been converted to some...
• ReformingThe thermal or catalytic conversion of petroleum naphtha into more volatile products of higher octane number...
• Reformulated gasoline1. Gasoline with a different composition from conventional gasoline (e.g., lower aromatics content) that cuts...
• Reformulated gasoline blendstock for oxygenate blendingPetroleum product which, when blended with a specified type and percentage of oxygenate, meets the definition...
• Reformulated gasoline covered areaThe geographic areas specified in § 1090.285 in which only RFG may be sold or dispensed to ultimate consumers.
• Reformulated gasoline creditUnit of measure for the paper transfer of benzene content resulting from reformulated gasoline which contains...
• Reformulated gasoline opt-in areaAn area that becomes a covered area under 42 U.S.C. 7545(k)(6) as listed in § 1090.285.
• Reformulated-summer gasolineFinished gasoline formulated for use in motor vehicles, the composition and properties of which meet the...
• Reformulated-winter gasolineFinished gasoline formulated for use in motor vehicles, the composition and properties of which meet the...
• Refractory indexA measure of the ability of a substance to be biodegraded by bacterial activity. The lower the refractory...
• Refractory metalsMetals of columbium, tantalum, molybdenum, rhenium, tungsten and vanadium and their alloys.
• Refractory productNonmetallic materials containing less than 50 percent carbon by weight and having those chemical and physical...
• Refractory shapeAny refractory piece forming a stable mass with specific dimensions.
• Refractory unit1. Combustion unit having no energy recovery (e.g., via a waterwall) in the furnace (i.e., radiant heat...
• Refractory wall furnace1. Combustion unit having no energy recovery (e.g., via a waterwall) in the furnace (i.e., radiant heat...
• Refractory-lined vesselContainer lined with insulation which is resistant to high temperatures.
• Refrigerant1. A substance that is used for cooling or heating because of its ability to absorb and transfer energy. For...
• Refrigerant annualizing method(i) Step 1. Take the number of pounds of refrigerant added to the appliance to return it to a full charge...
• Refrigerant circuit1. The parts of an appliance that are normally connected to each other (or are separated only by internal...
• Refrigerant circuit componentPart of the refrigerant circuit within an appliance including, but not limited to, compressors, condensers...
• Refrigerant leak inspectionExamination of an appliance to determine the location of refrigerant leaks. Potential methods include, but...
• Refrigerant leak rate1. The rate at which an appliance is losing refrigerant, measured between refrigerant charges. The leak rate...
• Refrigerant recovery equipmentRefrigerant recovery or recycling equipment that is capable of removing the refrigerant from an appliance...
• Refrigerant seasonal varianceRemoval of refrigerant from an appliance due to a change in ambient conditions caused by a change in season...
• Refrigerant serviceAny service during which discharge or release of refrigerant from the MVAC or MVAC-like appliance to the...
• Refrigerated condenserVapor recovery system into which an air-perchloroethylene gas-vapor stream is routed and the...
• Refrigerated condenser coilCoil containing the chilled liquid used to cool and condense the perchloroethylene.
• Refrigerated condensers, see Refrigerated condenser
• Refrigeration appliance1. Any device which contains and uses a class I or class II substance or substitute as a refrigerant and...
• Refrigeration unitLowers the temperature through a mechanical process. In a typical refrigeration unit, electricity powers a...
• Refueling emissions1. Emissions released during vehicle re-fueling.
• Refueling emissions canisterAny vapor storage unit(s) that is exposed to the vapors generated during refueling.
• RefugiaAn isolated place of relative safety from danger and hardship; the only remaining high quality habitat within...
• RefugiumAn area that remains unchanged while areas surrounding it change markedly; hence the area serves as a refuge...
• RefurbishMeaning given in § 1033.640.
• RefuseAll solid, liquid, or gaseous waste material, including but not limited to, garbage, trash, household refuse...
• Refuse bankAll solid, liquid, or gaseous waste material, including but not limited to, garbage, trash, household refuse...
• Refuse mineSurface mine where coal is recovered from previously mined coal. It may also be known as a silt bank, culm...
• Refuse reclamationConversion of solid waste into useful products; e.g., composting organic wastes to make soil conditioners or...
• Refuse-derived fuel1. Type of municipal solid waste produced by processing municipal solid waste through shredding and size...
• Refuse-derived fuel stokerSteam generating unit that combusts refuse-derived fuel in a semisuspension firing mode using air-fed...
• RefutationThe logical process of demonstrating the impossibility of a candidate cause, thus allowing it to be...
• Regeneration1. Manipulation of cells to cause them to develop into whole plants.
• Regenerative brakingA feature of hybrid and plug-in electric vehicles that captures energy normally lost during braking by using...
• Regenerative catalytic oxidizerDestructive technology for volatile organic compounds
• Regenerative cycle gas turbineAny stationary gas turbine which recovers heat from the gas turbine exhaust gases to preheat the inlet...
• Regenerative fuel cellA fuel cell that produces electricity from hydrogen and oxygen and can use electricity from solar power or...
• Regenerative medicineA field of medicine concerned with developing and using strategies aimed at repair or replacement of damaged...
• Regenerative thermal oxidizerThermal oxidizer that transfers heat from the exhaust gas stream to the inlet gas stream by passing the...
• Region1. The name of the geographic region to which the control strategy is to be applied. This is for user...
• Region 5Region 5 of the U.S. Environmental Protection Agency is made up of the states of Illinois, Indiana, Michigan...
• Regional administrator1. Administrator of one of the ten EPA Regional Offices or his or her authorized representative.
• Regional circulation systemThe synoptic scale weather pattern.
• Regional climateAn average of the weather in a particular area over many years. Regional climate influences which kinds of...
• Regional codification teamA group of EPA and state staff members established to work together to help resolve the problems and issues...
• Regional deposited doseThe deposited dose of particles calculated for a respiratory tract region of interest (r) as related to an...
• Regional deposited dose ratioThe ratio of the regional deposited dose calculated for a given exposure in the animal species of interest to...
• Regional exchange network coordinatorActs as the coordinator and facilitator of the EN and the EN grant program for the region in which they work...
• Regional gas doseThe gas dose calculated for the region of interest as related to the observed effect for respiratory effects...
• Regional gas dose ratioThe ratio of the regional gas dose calculated for a given exposure in the animal species of interest to the...
• Regional haze1. Visibility impairment that is caused by the emission of air pollutants from numerous sources located over...
• Regional hearing clerkIndividual duly authorized to serve as hearing clerk for a given region, who shall be neutral in every...
• Regional initiativesRegional initiatives are designed to encourage regional collaboration in addressing climate change. They can...
• Regional judicial officer1. An attorney at the office of EPA that filed the Complaint who has not performed any prior investigative or...
• Regional officeOne of the ten (10) EPA Regional Offices.
• Regional planning organizationOrganizations sponsored by EPA to address visibility impairment from a regional perspective. Examples of RPOs...
• Regional referenceA set of sites within a region that represent the best conditions of some environmental characteristic (e.g...
• Regional reference siteSet of sites within a region that represent the best conditions of some environmental characteristic (e.g., a...
• Regional response team1. There are 13 RRTs, one for each of 10 federal regions, plus one for Alaska, one for the Caribbean, and one...
• Regional safety & health managerThe Region's safety and health technical expert with overall day-to-day responsibility for administration of...
• Regional supplemental guidance1. Guidance to environmental program applicants prepared by the Regional Administrator, based on the national...
• Regional training officerThe individual assigned oversight responsibility for the management and leadership of the Region 7...
• Regional vulnerability assessmentApplying environmental indicators (or descriptive metrics) to represent important endpoints and examines the...
• Regional wastewater projectConstruction, operation, and maintenance of water or wastewater conveyances, water or wastewater treatment...
• Regional water projectConstruction, operation, and maintenance of water or wastewater conveyances, water or wastewater treatment...
• RegionalizationProcedure for subdividing a geographic area into regions of relative homogeneity in ecological systems or in...
• Regionally significant transportation projectTransportation project (other than an exempt project) that is on a facility which serves regional...
• Registrant1. A pesticide manufacturer that has registered a pesticide product.
• RegistrarPerson in charge of approving resource registration.
• Registration1. Formal listing with EPA of a new pesticide before sale or distribution. EPA is responsible for pre-market...
• Registration jacketAlso Registration File. A file of documents supporting registration for each pesticide product. These files...
• Registration marksCrosses or other targets applied to original copy prior to photography. Used for positioning films in...
• Registration standardsPublished documents which include summary reviews of the data available on a pesticide's active ingredient...
• RegistryA catalog where metadata definitions are stored and maintained.
• Registry of EPA applications, databases, and modelsRegisters EPA systems and applications but no longer registers databases.
• Regraded areaSurface area of a coal mine that has been returned to required contour.
• Regression analysis1. Analysis of the functional relationship between two variables; the independent variable is described on...
• Regression coefficientAn asymmetric measure of association; a statistic computed as part of a regression analysis.
• Regression effectsThe tendency of subjects, who are initially selected due to extreme scores, to have subsequent scores move...
• Regression statisticAny of the regression statistics specified in § 1065.602.
• Regression testingAll testing performed on the original version of the module or linked modules is repeated to detect new...
• Regular grade gasolineGasoline having an antiknock index, i.e., octane rating, greater than or equal to 85 and less than 88. This...
• Regular maintenanceThe routine inspection and testing of a well so that it can be ready for immediate use. This is a criterion...
• RegularityWhere and when the cause occurs, the effect always occurs. This definition is now usually modified by...
• Regularly employed individualWith respect to an officer or employee of a person requesting or receiving a Federal contract, grant, loan...
• Regulated activity1. Any HWM facility or any other facility or activity (including land or appurtenances thereto) that is...
• Regulated air pollutant1. Nitrogen oxides or any volatile organic compounds;(2) Any pollutant for which a national ambient air...
• Regulated area1. Area established by the regulated entity to demarcate areas where airborne concentrations of a specific...
• Regulated asbestos-containing materialFriable asbestos material or nonfriable ACM that will be or has been subjected to sanding, grinding, cutting...
• Regulated blendstockAny person who owns, leases, operates, controls, or supervises a facility where regulated blendstocks are...
• Regulated blendstock producerAny person who owns, leases, operates, controls, or supervises a facility where regulated blendstocks are...
• Regulated chemicalAny chemical substance or mixture for which export notice is required under § 707.60.
• Regulated coal combustion residuals unitNew CCR landfill, existing CCR landfill, new CCR surface impoundment, existing CCR surface impoundment...
• Regulated communityThe group of organizations, people, industries, businesses, and agencies that, because they perform certain...
• Regulated contaminantContaminants in drinking water whose levels are limited by the National Primary Drinking Water Regulations...
• Regulated electric power unitInstallations regulated by EPA or the states which produce electricity.
• Regulated emission1. Air pollutants exhausted from a unit or source into the atmosphere, as measured, recorded, and reported to...
• Regulated facility1. A distinct real property entity (i.e., a man-made object and its surrounding real estate). For the...
• Regulated gas streamOffgas stream that is routed to a boiler for the purpose of achieving compliance with a standard under...
• Regulated intramembrane proteolysisA process that involves the proteolysis of an integral membrane protein at a site that is within its...
• Regulated material1. The organic-containing materials that are used in the three printing, coating, and dyeing subcategories...
• Regulated medical wasteUnder the Medical Waste Tracking Act of 1988, any solid waste generated in the diagnosis, treatment, or...
• Regulated parameter amountAs determined by an approved method and listed by 40 CFR 136.2 in Table 1B
• Regulated pest1. Specific organism considered by a State or Federal agency to be a pest requiring regulatory restrictions...
• Regulated pollutant fee calculation1. Used only for purposes of § 71.9(c), means any regulated air pollutant except the following:(1) Carbon...
• Regulated processAny activity involving a regulated substance including any use, storage, manufacturing, handling, or on-site...
• Regulated PSD activityMajor PSD stationary source or major PSD modification.
• Regulated source1. For the purposes of this subpart, means the stationary source, the group of stationary sources, or the...
• Regulated substance1. According to Subpart A of 40 CFR §280.10, a "regulated substance" means: (a) any substance defined in §...
• Regulated substance blendMixture that contains one or more regulated substances.
• Regulated substance destructionExpiration of a controlled substance to the destruction and removal efficiency actually achieved, unless...
• Regulated substance reclamationReprocessing of regulated substances to all of the specifications in appendix A to 40 CFR part 82, subpart F...
• Regulated substance userPerson to take any action with or to a regulated substance, regardless of whether the regulated substance is...
• Regulated unitRegulated units are defined as surface impoundments, waste piles, land treatment units, and landfills that...
• Regulating damDam impounding a reservoir from which water is released to regulate the flow downstream.
• Regulation1. Regulatory programs that are applied to an emissions unit or emissions process for the purpose of limiting...
• Regulations, see Regulation
• Regulations and permits designEasier to implement, with a goal of improved compliance and environmental outcomes.
• Regulations, laws & executive ordersIncludes rules or orders issued by a federal or state executive-branch department or administrative agency...
• Regulator stationDevice which reduces the pressure of natural gas in the transmission lines as the gas moves into the...
• Regulatory agencyGovernment agency responsible for issuing regulations governing the use of sources of radiation or...
• Regulatory AuthorityThe unit of government that establishes and enforces codes related to the permitting, design, placement...
• Regulatory checklistsUsed to describe a Base Program Checklist or a Revision Checklist.
• Regulatory compliance & enforcementRegulatory Compliance and Enforcement involves the direct monitoring and oversight of a specific individual...
• Regulatory creationRegulatory Creation involves the activities of research and drafting proposed and final regulations.
• Regulatory crosswalkAn organized approach for classifying each section/paragraph of state regulations so that the authorized...
• Regulatory developmentRegulatory Development involves activities associated with developing regulations, policies, and guidance to...
• Regulatory flexibility actTo amend title 5, United States Code, to improve Federal rulemaking by creating procedures to analyze the...
• Regulatory gene1. Genes which regulate or circumscribe the activity of other genes; specifically, genes which code for...
• Regulatory identification numberA number assigned by the Regulatory Information Service Center that identifies each regulatory action listed...
• Regulatory localityGeographic areas and localities in the United States which are defined by a variety of federal regulations or...
• Regulatory metricA quantity which has particular EPA regulatory significance. Often expressed in the form of limitations and...
• Regulatory modeling life-cycleOverall process for developing a model which can be used in rule-making
• Regulatory processA process that acts to control the rate or manner in which another process progresses or a product is formed.
• Regulatory proteinsEncoded by Regulatory Genes, Regulatory Proteins regulate or circumscribe the activity of many cellular...
• Regulatory quantityQuantity is a property ascribed to phenomena, bodies, or substances that can be quantified for, or assigned...
• Regulatory regionGenetic material that controls the expression of the genetic material that encodes a pesticidal substance or...
• Regulatory roleFunctions assumed by a person, group or other entity in regulatory situations.
• Regulatory sub-categoryOne of the following groups:(1) All vehicles subject to the standards of § 1037.104. Note that this category...
• Regulatory time frameTime period beginning at disposal and ending 10,000 years after disposal.
• RehabilitationThe manipulation of the physical, chemical, or biological characteristics of a site with the goal of...
• Reheat furnacefurnace used to heat steel product - including metal ingots, billets, slabs, beams, blooms and other similar...
• Reinforcement plantingAdditional trees and shrubs that are planted during the short-term maintenance phase (approximately 2 years...
• ReinsuranceA procedure by which an insurance company insures its risks (e.g., those liabilities associated with its...
• Reinventing government initiativeUnder the Reinventing Government initiative launched by President Bill Clinton and Vice President Al Gore...
• Rejectionist causation1. The only defensible form of scientific inference is to frame and reject hypotheses-including causal...
• Relabeled additiveFuel additive which is registered by its original manufacturer with EPA and is also registered and sold...
• Relading stationFacility where molten iron is emptied from the railroad torpedo car or hot metal car to the shop ladle. This...
• Related coatingAll non-ink purchased liquids and liquid-solid mixtures containing VOC solvent, usually referred to as...
• Related companyIncludes, but is not limited to: a parent company and its subsidiaries; sibling companies owned by the same...
• Related docketsA reference created by an agency showing a relationship between two dockets.
• RelationThe concept of function, correlation, or association between or among attributes, which may be qualitative as...
• Relational DatabaseA relational database groups search results together based on shared characteristics within a data set.A...
• RelationshipRelationship in this case means that which is between two or more resources. There are many types of...
• Relative abundances1. Measure of the population of one species in an ecosystem as compared to other species within that same...
• Relative accuracy1. Statistic designed to provide a measure of the systematic and random errors associated with data from...
• Relative accuracy auditQuarterly audit of the PEMS against a portable analyzer meeting the requirements of ASTM D6522-00 or a RM for...
• Relative accuracy test auditRA test that is performed at least once every four calendar quarters after the initial certification test...
• Relative ecological sustainabilityAbility of an ecosystem to maintain relative ecological integrity indefinitely.
• Relative percent differenceA measure of precision, calculated by: Rd% = [X₁ - X₂]/Xave x 100 where: X₁ = concentration observed with the...
• Relative permeability1. The permeability of the rock to gas, NAPL, or water, when any two or more are present, expressed as a...
• Relative potency factorThe ratio of the toxic potency of a given chemical to that of an index chemical in the CAG. Relative potency...
• Relative response factorThe response of the mass spectrometer (MS) to a known amount of an analyte relative to a known amount of an...
• Relative risk1. The relative measure of the difference in risk between the exposed and unexposed populations in a cohort...
• Relative risk assessment1. A process similar to comparative risk assessment. It involves estimating the risks associated with...
• Relative sea level rise1. The increase in ocean water levels at a specific location, taking into account both global sea level rise...
• Relative standard deviation100 times the standard deviation divided by the mean for a set of measurements.
• Relay dryerSecond stage and subsequent stages following the primary stage of a multi-stage tube dryer. Secondary tube...
• Release1. A "release" is defined by CERCLA as "any spilling, leaking, pumping, pouring, emitting, emptying...
• Release by sizeRefers to the following size classifications which are provided as guidance to the OSC for meeting pollution...
• Release heightThe height at which an air release occurs. Ground level is the default presumed context for the Federal...
• Release normal rangeThe normal range of a release is all releases (in pounds or kilograms) of a hazardous substance reported or...
• Release of creditsDetermination by the district engineer, in consultation with the IRT, that credits associated with an...
• Release pointThe location (defined optionally by geographic coordinates) at which pollutants are released into the...
• Release sampleA sample taken to determine whether the concentration of a hazardous substance is significantly above its...
• Release size classThe following size classifications which are provided as guidance to the OSC for meeting pollution reporting...
• Release zoneArea swept out by the locus of points constantly 100 meters from the perimeter of the conveyance engaged in...
• Releases, see Release
• Relevant and appropriate requirementThose cleanup standards, standards of control, and other substantive requirements, criteria, or limitations...
• Relevant deviationMeans the response associated with the BMR will be the background estimate plus or minus (depending on the...
• Relevant experienceAs used in the definition of environmental professional in this section, means: participation in the...
• Relevant studyStudies that are applicable or pertinent, but not necessarily the most important to derive exposure factors...
• Reliability1. The confidence that (potential) users have in a model and in the information derived from the model such...
• Reliability assessmentAn effort required to demonstrate the repeatability of a measurement or how likely a question may be to get...
• Reliable power generationProbability that a generating unit will perform when used under stated conditions.
• RelictA remnant or fragment of the climax plant community that remains from a former period when it was more widely...
• Relict tidal inletA channel remnant that is left from a former tidal inlet. The channel was cut off or abandoned by infilling...
• Relief device1. Valve used only to release an unplanned, nonroutine discharge. A relief valve discharge can result from an...
• Relief valve1. Valve used only to release an unplanned, nonroutine discharge. A relief valve discharge results from an...
• Relief valve dischargeAny nonleak discharge through a relief valve.
• Reliquifaction(re-LICK-we-FACK-shun)
• RemThe unit of dose equivalent from ionizing radiation to the total body or any internal organ or organ system...
• Remaining fluorinated GHGfluorinated GHGs that are none of the following: (1) Fully fluorinated GHGs; (2) Saturated hydrofluorocarbons...
• Remanent magnetizationMagnetization remaining after the application of magnetic field has ceased.
• Remanufacture1. To replace every cylinder liner in a commercial engine with maximum engine power at or above 600 kW...
• Remanufacture system1. All components (or specifications for components) and instructions necessary to remanufacture a locomotive...
• Remanufactured locomotive1. Either a locomotive powered by a remanufactured locomotive engine, a repowered locomotive, or a...
• Remanufactured locomotive engineLocomotive engine which has been remanufactured.
• Remanufacturer1. Individual or entity that is engaged in the manufacture or assembly of remanufactured locomotives or...
• RemanufacturingA form of product recovering that involves rebuilding, repairing, and/or restoring parts or an instrument to...
• Remanufacturing systemAll components (or specifications for components) and instructions necessary to remanufacture a locomotive or...
• Remedial action1. The actual construction or clean-up phase of a Superfund site cleanup.
• Remedial action master plan1. A planning document that identifies projects which are necessary for restoration of a hazardous waste...
• Remedial action plan1. A Remedial Action Plan, tailored to the needs of the remediation waste management site, is used in place...
• Remedial action plans, see Remedial action plan
• Remedial action project completionThis measure augments the site-wide Construction Completion measure and applies to the actual construction or...
• Remedial action (RA) project completionThis measure augments the site-wide Construction Completion measure and applies to the actual construction or...
• Remedial action (radioactive material)Any action performed under section 108 of the Act.
• Remedial action workplanDetailed plan for remediation of onsite contamination, including cleanup methods, long-term maintenance...
• Remedial design1. A phase of remedial action that follows the remedial investigation/feasibility study and includes...
• Remedial design and remedial actionRemedial Design is defined in the NCP as "the technical analysis and procedures which follow the selection of...
• Remedial Design/Remedial Action1. See http://www.epa.gov/superfund/cleanup/rdra.htm. Remedial Design (RD) is the phase in Superfund site...
• Remedial Design/Remedial Action NegotiationsDiscussions and information exchange between potentially responsible parties (PRPs) and EPA (or state) over...
• Remedial investigation1. An in-depth study designed to gather data needed to determine the nature and extent of contamination at a...
• Remedial investigation and feasibility study1. The RI/FS is the step in the Superfund cleanup process that is conducted to gather sufficient information...
• Remedial Investigation/Feasibility Study1. A two-part study that is completed before any Superfund-related remedial cleanup can begin. The first part...
• Remedial Investigation/Feasibility Study NegotiationsDiscussions between EPA and the potentially responsible parties (PRPs) on liability for and conduct of a...
• Remedial Investigation/Feasibility Study Workplan Approval by HQApproval of the remedial investigation/feasibility study (RI/FS) workplan, which is a description of the...
• Remedial project manager1. The EPA or State official responsible for overseeing on-site remedial action.
• Remedial responseLong-term action that stops or substantially reduces a release or threat of a release of hazardous substances...
• Remedial site assessment completionThis measure tracks the number of remedial site assessments completed under the Federal Superfund program by...
• Remedial technology1. The name of a technology used to treat, stabilize, contain, or remove contaminated media.
• Remediation1. Cleanup or other methods used to remove or contain a toxic spill or hazardous materials from a hazardous...
• Remediation action levelGenerally, a concentration such that remediation of all concentrations above this level in an exposure unit...
• Remediation expenseExpenses incurred for or in connection with the investigation, monitoring, removal, disposal, treatment, or...
• Remediation goalGenerally, a health-based chemical concentration in an environmental medium chosen by the risk manager as...
• Remediation servicesThis industry comprises establishments primarily engaged in one or more of the following: (1) remediation and...
• Remediation technologyTechnology used to clean up a spill or release after it happens.
• Remediation waste1. The possibly large amounts of waste (such as contaminated soils, water, debris, and sludge) that contain a...
• Remediation waste management siteFacility where an owner or operator is or will be treating, storing or disposing of hazardous remediation...
• RemedyThose actions consistent with permanent remedy taken instead of, or in addition to, removal action in the...
• Remedy construction1. Remedy Construction is the phase in Superfund site cleanup where the actual remedy (e.g. landfill cap or...
• Remedy construction - no remedy constructed1. The event when the State of EPA acknowledges in writing that the RCRA facility has completed construction...
• Remedy construction - remedy constructed1. The event when the State of EPA acknowledges in writing that the RCRA facility has completed construction...
• Remedy construction deferral expiration1. The event to document the expiration date of the deferral of final remedy construction in specified...
• Remedy decisionThe event by which the State or EPA formally selects a remedy designed to meet RCRA Corrective Action...
• Remedy design1. Remedy Design is the phase in Superfund site cleanup where the technical specifications for cleanup...
• Remedy selectedThe remedy selected at a site is the method that EPA has determined will best address, correct, or remediate...
• RemodelingRemodeling is alterations to the interior of a structure, and does not involve the installation of any new...
• Remote data collectionReceipt and storage of data at a location far removed from the site where the data are generated, e.g...
• Remote magnetic guidance system1. In horizontal directional drilling, a locating technology that uses a sensor in the sonde that senses its...
• Remote reservoir cold cleaning machineAny device in which liquid solvent is pumped to a sink-like work area that drains solvent back into an...
• Remote reservoir continuous web cleaning machineContinuous web cleaning machine in which there is no exposed solvent sump. In these units, the solvent is...
• Remote Sensing1. Remote sensing is a method of visualizing the radiative properties of the Earth's surface using...
• Remote sensing monitoring technologyA system which collects and interprets information about an object without physical contact with the object...
• Remote sensing systemThe technology of acquiring data and information about an object or phenomena by a device that is not in...
• Remote-handledA legal definition from the WIPP Land Withdrawal Act. Transuranic waste whose surface radioactive dose rate...
• Remote-handled transuranic wasteLegal definition from the WIPP Land Withdrawal Act. Transuranic waste whose radioactive dose rate is 200 mrem...
• Remote-sensing imagery recordThese records include aerial photographs and other visual images of the surface of the earth or other planets...
• Remote-sensing imagery records, see Remote-sensing imagery record
• Removable parts cleaningCleaning of parts that have been moved from their normal position to a wash tank or sink containing solvent...
• Removal1. The taking out or the stripping of substantially all ACBM from a damaged area, a functional space, or a...
• Removal action1. CERCLA defines a removal action in part as "the cleanup or removal of hazardous substances from the...
• Removal aerial surveyAerial photography, MultiSpectral Scanner (MSS), Forward Looking InfraRed (FLIR), and historical aerial...
• Removal assessmentCollecting site characteristics to determine whether or not a removal must be performed.
• Removal community relationsCommunity relations activities must take place for all responses lasting longer than 45 days, addressing the...
• Removal costAs defined by section 1001 of the OPA means the costs of removal that are incurred after a discharge of oil...
• Removal creditVariance for an IU from the otherwise applicable categorical pretreatment standard that reflects the POTW’s...
• Removal efficiencyEfficiency of an abatement system to destroy or remove fluorinated GHGs, N2O, or both. The destruction or...
• Removal negotiationDiscussions between EPA and the potentially responsible parties (PRPs) on the liability for and conduct of a...
• Removal negotiations, see Removal negotiation
• Removed from the proposed National Priorities ListSite removed from the proposed National Priorities List (NPL) before achieving final NPL status, or sites...
• RenalPertaining to the kidney.
• Renal disordersA neoplastic or non-neoplastic condition affecting the kidney. Representative examples of non-neoplastic...
• Renal filtrationA renal system process in which fluid circulating through the body is filtered through a barrier system.
• Renal functionPhysiological activity and functions of the kidneys as a whole or of any of its parts, including filtering...
• Renal function testA laboratory procedure that evaluates the kidney function.
• Renal reabsorptionA renal system process in which water, ions, glucose and proteins are taken up from the collecting ducts...
• Renal secretionSecretion of substances from peritubular capillaries into the renal tubules to be incorporated subsequently...
• Rendered animal fatFats extracted from animals which are generally used as a feedstock in making biodiesel.
• RendererIndependent or off-site rendering operation, which is conducted separate from a slaughterhouse, packinghouse...
• Renewable biomassEach of the following (including any incidental, de minimis contaminants that are impractical to remove and...
• Renewable compressed natural gasBiogas, treated biogas, or RNG that is compressed for use as transportation fuel and meets the definition of...
• Renewable crudeBiologically derived liquid feedstocks including but not limited to poultry fats, poultry wastes, vegetable...
• Renewable crude-based fuelRenewable fuels that are gasoline or diesel products resulting from the processing of renewable crudes in...
• Renewable diesel fuelDiesel fuel and diesel fuel blending components produced from renewable sources that are coprocessed with...
• Renewable electricityElectricity that meets the definition of renewable fuel
• Renewable energy1. Energy obtained from sources that are essentially inexhaustible, unlike, for example, the fossil fuels, of...
• Renewable energy certificate1. Also known as green tags, green energy certificates, or tradable renewable certificates. RECs represent...
• Renewable energy certificates, see Renewable energy certificate
• Renewable energy production incentiveIncentive established by the Energy Policy Act available to renewable energy power projects owned by a state...
• Renewable energy source1. Includes resources that rely on fuel sources that restore themselves over short periods of time and do not...
• Renewable feedstock useUse starting materials (also known as feedstocks) that are renewable rather than depletable. The source of...
• Renewable fuel1. Motor vehicle fuel that is used to replace or reduce the quantity of fossil fuel present in a fuel mixture...
• Renewable fuel exportTransfer of a batch of renewable fuel to a location outside the United States; and the transfer of a batch of...
• Renewable fuel exporter1. Any person that transfers any renewable fuel from a location within the contiguous 48 states or Hawaii to...
• Renewable fuel importer1. Any U.S. domestic person who (1) Brings transportation fuel or renewable fuel into the 48 contiguous...
• Renewable fuel pathwayIncludes three critical components: (1) feedstock, (2) production process and (3) fuel type. Each combination...
• Renewable gasoline1. Renewable fuel made from renewable biomass that is composed of only hydrocarbons and which meets the...
• Renewable gasoline blendstockBlendstock made from renewable biomass that is composed of only hydrocarbons and which meets the definition...
• Renewable identification number1. Unique number generated to represent a volume of renewable fuel pursuant to §§ 80.1125 and 80.1126...
• Renewable identification number generating foreign producerForeign renewable fuel producer that has been registered by EPA to generate RINs for renewable fuel it...
• Renewable identification number generatorParty allowed to generate RINs under this part.
• Renewable identification number verification statusDescription of whether biogas, treated biogas, RNG, or a RIN has been verified under an EPA-approved quality...
• Renewable Identification Number-less Renewable Natural GasRNG produced by a foreign RNG producer and for which RINs were not generated by the foreign RNG producer.
• Renewable liquefied natural gasBiogas, treated biogas, or RNG that is liquified ( i.e., it is cooled below its boiling point) for use as...
• Renewable natural gas1. Biogas that has been upgraded for use in place of fossil natural gas.
• Renewable natural gas as feedstockRNG used to produce renewable fuel under § 80.125.
• Renewable natural gas importerPerson who imports RNG into the covered location and generates RINs for the RNG as specified in § 80.125.
• Renewable natural gas producerPerson who owns, leases, operates, controls, or supervises an RNG production facility.
• Renewable natural gas production facilityFacility where biogas is upgraded to RNG under an approved pathway.
• Renewable portfolio standard1. A renewable portfolio standard (RPS) requires electric utilities and other retail electricity providers to...
• Renewable portfolio standards, see Renewable portfolio standard
• Renewable resource1. A natural resource that can be produced, regrown, or reused fast enough to keep up with how quickly it is...
• RENEWALAn extension for an additional funding/budget period for a project having no projected completion date, but...
• Renin-angiotensin systemA BLOOD PRESSURE regulating system of interacting components that include RENIN; ANGIOTENSINOGEN; ANGIOTENSIN...
• Renovation1. Modification of any existing structure, or portion thereof, that results in the disturbance of painted...
• RenovatorIndividual who either performs or directs workers who perform renovations. A certified renovator is a...
• Re-opener CoverageCoverage that insures for the costs of additional remediation ordered by environmental regulators or...
• RepackagersEntities who transfer regulated substances, either alone or in a blend, from one container to another...
• Repackaging1. Physical transfer of a chemical substance or mixture, as is, from one container to another container or...
• RepairReturning damaged ACBM to an undamaged condition or to an intact state so as to prevent fiber release.
• Repair process1. Any process used to return a finished object or tool back to its original function or shape.
• Repair spraySpray coating for post-formed easy-open ends to provide additional protection in the scored areas by covering...
• Repaired(1) For the purposes of fugitive emissions components affected facilities, that fugitive emissions components...
• Repaired equipment1. Equipment is adjusted, or otherwise altered, in order to eliminate a leak as defined in the applicable...
• Repaired fugitive emissions components1. Fugitive emissions components are adjusted, replaced, or otherwise altered, in order to eliminate fugitive...
• Repeat compliance period1. Any subsequent compliance period after the initial compliance period.
• Repeat sectionA short interval of log that is run a second time to establish repeatability and stability.
• Repeatability1. Precision of ten mean measurements of a reference quantity. Determine instrument repeatability, accuracy...
• Repeatable variableVariables used in the formulas for the facility's engineering model for gas apportioning factors are based on...
• Repeated measuresA biological endpoint is measured for the same individual or animal at different times (e.g., body weight at...
• RepellantAny chemical which can be used to drive away insects, bears, dogs, or other pests.
• RepellentSubstances designed to deter pests, often from eating the protected crop. Also may apply to structures used...
• Repetitive polymerase chain reactionTechnique to replicate a fragment of DNA (or RNA) multiple times by incubating separated strands of DNA with...
• Repetitive polymerase chain reaction - BOX primersParticular set of oligonucleotide primers employed in the polymerase chain reaction.
• Replaced existing control deviceFor the purposes of these standards, the replacement of an existing control device with another control...
• Replaced unitWith regard to a unit, the demolishing of a unit, or the permanent shutdown and permanent disabling of a...
• ReplacementReplacing higher species with lower ones or animals with cells or computer models.
• Replacement cost1. The cost of replacing property without deduction for depreciation.
• Replacement engineEngine exempted as a replacement engine under § 1068.240.
• Replacement heifersOften ones being raised to replace the cows currently in the herd.
• Replacement in kindReplacement that satisfies the design specifications.
• Replacement processSubstitution of an existing engine or equipment with another.
• Replacement sourceWith regard to a unit, the demolishing of a unit, or the permanent shutdown and permanent disabling of a...
• Replacement thermal energy unitAffected unit replacing the thermal energy provided by an opt-in source, where both the affected unit and the...
• Replacement waste unitLandfill, surface impoundment, or waste pile unit (1) from which all or substantially all of the waste is...
• Replant diseaseA disease affecting susceptible plants such as apples, pears, plums, cherries and roses when they are placed...
• Replicable methodMethods which are sufficiently unambiguous such that the same or equivalent results would be obtained by the...
• Replicate1. Duplicate analysis of an individual sample. Replicate analyses are used for quality control.
• Replicate analysesThe measurements of the variable of interest performed identically on two or more sub-samples of the same...
• Replicate numberBIOS sample replicate number.
• Replicate precisionPrecision determined from repeated analysis of a gas sample from one canister, which may be evaluated by...
• Replication1. The duplication of an experiment or program.
• RepliconA unit of DNA that contains a DNA replication origin and a termination point and is capable of...
• REPORTA narrative, statistical, graphic, or other account of operations, conditions, or plans that is recorded on...
• Report typeThere are three different types of reports you can receive. Station Description Report: This type of report...
• Reportable chemical substanceChemical substance described in § 711.5.
• Reportable insulating gas1. Insulating gas whose weighted average GWP, as calculated in equation SS-2 to § 98.452, is greater than...
• Reportable quantity1. Amount of a hazardous or extremely hazardous substance that, if released into the environment, must be...
• Reporting & informationReporting and Information includes providing financial information, reporting and analysis of financial...
• Reporting and recordkeeping operating scenarioAny specific operation of a PMPU and includes for each process:(1) A description of the process and the type...
• Reporting cycleThe Integrated Reporting cycle of the data.
• Reporting dataThe results of any type of monitoring or method, including the results of instrumental or non-instrumental...
• Reporting entityThe State, Local, or Tribal (S/L/T) Agency, or its delegate, that has the responsibility for reporting...
• Reporting limit1. The minimum value below which data are documented as non-detects. {OW/TSC} {OECA} {ORCR}
• Reporting organizationEntity, such as a State, local, or Tribal monitoring agency, that collects and reports air quality data to...
• Reporting periodThe timeframe for the reported activity and/or emissions.
• Reporting unitsThe code representing the measurement scale that accompanies a numeric value (e.g., degrees Centigrade...
• Reporting year1. The Reporting Year (RY) corresponds to the calendar year (January 1 to December 31) for which facilities...
• Reports & assessmentsIn-depth information, toxicity assessments, budgets, strategic plans, conference proceedings, reports to...
• RepositoryStorage location for services, components, or resources in general.
• Repository footprintOutline of the outermost locations of where the waste is emplaced in the Yucca Mountain repository
• Repowered locomotiveLocomotive that has been repowered with a freshly manufactured engine.
• Repowered sourceWith regard to a unit, replacement of a coal-fired boiler with one of the following coal-fired technologies...
• Repowering1. Rebuilding and replacing major components of a power plant instead of building a new one.
• Repowering locomotive1. Replacement of the engine in a previously used locomotive with a freshly manufactured locomotive engine...
• Repowering unit1. With regard to a unit, replacement of a coal-fired boiler with one of the following coal-fired...
• Representational state transfer application programming interfaceA software architecture that creates rules for data interoperability.
• Representational state transfer web serviceSoftware system designed to support machine-to-machine interaction over a network. Representational State...
• Representations and warrantiesA risk allocation tool used in property transactions which involves statements of fact (representations) and...
• RepresentativeReflecting the characteristics or nature of the larger population to which one wants to generalize.
• Representative affected facilityIndividual wood heater that is similar in all material respects to other wood heaters within the model line...
• Representative (Attorney), see Representative
• Representative concentration pathwayScenarios that include time series of emissions and concentrations of the full suite of greenhouse gases, and...
• Representative consumer productConsumer product that is subject to the same VOC limit in § 59.203 as the innovative product.
• Representative important speciesSpecies which are representative, in terms of their biological needs, of a balanced, indigenous community of...
• Representative operating condition1. Operation of a process unit during performance testing under the conditions that the process unit will...
• Representative sample1. A portion of material or water that is as nearly identical in content and consistency as possible to that...
• Representative samplesServing as a typical or characteristic sample; should provide analytical results that correspond with actual...
• Representativeness1. The measure of the degree to which data accurately and precisely represent a characteristic of a...
• Reproducibility1. The degree of variation obtained when the same measurement is made with similar instruments and many...
• Reproductive and developmental toxicologyThe branch of pharmacology that deals with the nature and effects of poisonous substances on reproduction and...
• Reproductive control agentSubstances used either in the prevention or facilitation of pregnancy.
• Reproductive development disordersEvidence suggests that environmental exposures to chemicals such as phthalates can affect the timing of...
• Reproductive hormone statusMeasurements which indicate the conditions of the various hormones involved in reproduction.
• Reproductive processA biological process that directly contributes to the process of producing new individuals by one or two...
• Reproductive system disordersA non-neoplastic or neoplastic disorder that affects the male or female genital system. Representative...
• Reproductive system measurementMeasurements which indicate the functioning of organs and tissues involved in the production and maturation...
• Reproductive toxicityHarmful effects on fertility, gestation, or offspring caused by exposure of either parent to a substance.
• ReptileCold-blooded, air-breathing vertebrates belonging to the class Reptilia, usually covered with external scales...
• ReptiliaCold-blooded, air-breathing VERTEBRATES belonging to the class Reptilia, usually covered with external scales...
• RepublicanThe Republican River Basin. Colorado, Kansas, Nebraska. Area = 24700 sq.mi.
• Repurposed drugPharmaceutical, developed for one purpose or to treat one disease, which is being used to treat another...
• Request for correctionA mechanism that enables the public to seek and obtain, where appropriate, correction of information...
• Request for hearingWritten notice requesting an administrative hearing of the total or partial denial of a claim by the Claims...
• Request for reconsiderationA mechanism by which the public can ask an Agency to reconsider their RFC if they are dissatisfied with the...
• Request identification numberA number assigned by EPA to identify your Freedom of Information Act request (e.g., 1234-99). Refer to the...
• RequestorThe party who files a Request for a Hearing.
• Requests for proposalsAn RFP is an announcement seeking proposals for the performance of a specified project or program component...
• Required reporting substanceThe chemical substances for which reporting is required under this section are: (What follows is a list of...
• Re-refined oilUsed oils from which the physical and chemical contaminants acquired through previous use have been removed...
• Re-RefiningProcessing of used oil using distillation, hydrotreating, and/or other treatment employing acid, caustic...
• Re-refining distillation bottomHeavy fraction produced by vacuum distillation of filtered and dehydrated used oil. The composition of still...
• ReregistrationThe reevaluation and relicensing of existing pesticides originally registered prior to current scientific and...
• Research & developmentResearch and Development involves the gathering and analysis of data, dissemination of results, and the...
• Research action planAn internal document that details the Research Projects, Research Products, and Research Outputs, necessary...
• Research activity1. Systematic investigation, including research development, testing and evaluation, designed to develop or...
• Research and development activity1. Activities conducted at a research or laboratory facility whose primary purpose is to conduct research and...
• Research and development equipmentAny equipment whose primary purpose is to conduct research and development to develop new processes and...
• Research and development facility1. Laboratory and pilot plant operations whose primary purpose is to conduct research and development into...
• Research and development process1. Laboratory or pilot plant operation whose primary purpose is to conduct research and development into new...
• Research and development process unitAny process unit whose purpose is to conduct research and development for new processes and products and is...
• Research and development projectProject for the purpose of investigating practices, monitoring techniques, or injection verification, or...
• Research and development small quantity1. Any quantity of PCBs (1) that is originally packaged in one or more hermetically sealed containers of a...
• Research biasThe tendency for research results to reflect the scientist’s subjective opinions, unproven assumptions...
• Research designA plan of what data to gather, from whom, how and when to collect the data, and how to analyze the data...
• Research development1. Work required to bring a new process, technique, methodology,or piece of equipment to the production or...
• Research, development, and demonstration sourceSource engaged in laboratory, pilot plant, or prototype demonstration operations:(1) Whose primary purpose is...

1,610 of 29,894 terms in Environment terminology (MLC-0121). Request the full dataset.