Environment terminology · MLC-0121

Environment terms: P (2,732)

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Population mobilityAn indicator of the frequency at which individuals move from one residential location to another.
Population ProcessA function or process affecting multiple organisms or organism groups.
population riskPopulation risk refers to an estimate of the extent of harm for the population or population segment being...
Population risk descriptorAn assessment of the extent of harm to the population being addressed. It can be either an estimate of the...
Population ServedThe population amount served by a public water system.
Population unitsThe entities that make up a target population. The units can be defined in many ways, depending on the survey...
Population Variability1. The concept of differences in susceptibility of individuals within a population to toxicants due to...
Population-Based Risk AssessmentStart with the human receptor, and determine what chemicals, stressors, or other risk factors adversely...
Population-Level EffectAn ecological term for an assessment endpoint that focuses on protecting a group of individuals within a...
Population-Oriented Monitoring SiteResidential areas, commercial areas, recreational areas, industrial areas where workers from more than one...
Populus albaWhite poplar, also known as silver-leaved or silverleaf poplar, is a tall tree that, at maturity, may reach...
Porcelain EnamelingEntire process of applying a fused vitreous enamel coating to a metal basis material. Usually this includes...
Porcine Proliferative EnteritisDiarrheal disease of pigs
Porcine Reproductive and Respiratory SyndromeA syndrome characterized by outbreaks of late term abortions, high numbers of stillbirths and mummified or...
Pore1. A very small open space in a rock or granular material.
Pore spaceOpen spaces in rock or soil. These are filled with water or other fluids such as brine (i.e., salty fluid).
pore volume(1) the total volume of pore space in a given volume of rock or sediment. Pore volume usually relates to the...
pore water pressureThe pressure exerted on its surroundings by water held in pore spaces in rock or soil.
PoriferaThe phylum of sponges which are sessile, suspension-feeding, multicellular animals that utilize flagellated...
Porosity1. The volume fraction of a rock or unconsolidated sediment not occupied by solid material but usually...
porosity, effectiveA measure of the connected aquifer void space within the aquifer. Effective porosity is lower than total...
porosity, totalThe volume fraction of a rock or unconsolidated sediment not occupied by solid material but usually occupied...
Porous Block Pavement SystemsPorous block pavement systems are prefabricated lattice structures made of concrete or plastic that are...
Porous pavementSpecial type of pavement that allows rain and snowmelt to pass through it, thereby reducing the runoff from a...
Porous Reactive WallTrenches constructed to intercept contaminated ground water and which are filled with materials such as...
Porous SurfaceAny surface that allows PCBs to penetrate or pass into itself including, but not limited to, paint or coating...
Porphyrins1. A group of compounds containing the porphin structure, four pyrrole rings connected by methine bridges in...
Port1. A designation used to distinguish between different destinations within a given computer. The operating...
Port AgencyA government entity. A port authority may own facilities in one or more ports, and a port authority’s domain...
Port Agency or Port Authority1. A government entity. A port authority may own facilities in one or more ports, and a port authority’s...
Port AuthorityA government entity. A port authority may own facilities in one or more ports, and a port authority’s domain...
Port of EntryThe port where a vehicle or engine enters the United States.
Portable Air CompressorAny wheel, skid, truck, or railroad car mounted, but not self-propelled, equipment designed to activate...
Portable Container1. Any portable device in which a material is stored, transported, treated, disposed of, or otherwise...
Portable Cyanide AnalyzerDetermines the free cyanide ion in water.
Portable Document FileAdobe's PDF is a universal electronic file format, modeled after the PostScript language and is device- and...
Portable Document FormatPDF is a file format that preserves the printed appearance of a document as an electronic image that you can...
Portable Electric HeaterA heater that uses electricity and that can be picked up and moved.
Portable Emission Measurement SystemMeasurement system consisting of portable equipment that can be used to generate brake-specific emission...
Portable EquipmentDesigned and capable of being carried or moved from one location to another. Indications of portability...
Portable FanBox fans, oscillating fans, table or floor fans, or other fans that can be moved.
Portable Fuel ContainerAny reusable container designed and marketed (or otherwise intended) for use by consumers for receiving...
Portable Marine Fuel LineDetachable fuel line that is used or intended to be used to supply fuel to a marine engine during operation...
Portable Marine Fuel Tank1. Portable fuel tank that is used or intended to be used to supply fuel to a marine engine during...
Portable Multi-Gas Emissions AnalyzerUsed to measure gaseous concentrations of nitrogen oxides (nitric oxide [NO] and nitrogen dioxide [NO2 ]...
Portable Nonroad Fuel Tank1. Fuel tank that meets each of the following criteria:(1) It has design features indicative of use in...
Portable Optical and Thermal Imaging Device1. Remote sensing system that can be used to detect leaking gas compounds such as methane and benzene.
Portable Pesticide ContainerRefillable container that is not a stationary pesticide container.
Portable PlantAny nonmetallic mineral processing plant that is mounted on any chassis or skids and may be moved by the...
Portable Storage TankAny container used to store oil and that is capable of being easily moved. For example, a 55-gallon drum or a...
Portable Water Analyzers Test KitAnalyzers that provide quantitative measurements of metals and other inorganic contaminants in water.
Portal-of-Entry Effect1. A local effect produced in the tissue or organ of first contact between a toxicant and the biological...
PortfolioRefers to insurance coverages for a combined set of sites, whether or not there is more than one insured...
Portfolio SnapshotAn overarching view of the ORD Research Portfolio or a portion of the ORD Research Portfolio at a given point...
Portland Cement Concrete1. Concrete is a hardened mixture of portland cement, sand, and coarse aggregate. Waste materials like fly...
Portland Cement PlantAny facility manufacturing portland cement by either the wet or dry process.
Positional Cloning1. The cloning or identification of a gene for a particular disease based on its location in the genome...
Positive CatalystChemical substance which increases the reaction rate.
Positive CreditEmission reductions below the standard.
Positive Displacement PumpA type of piston, diaphragm, gear or screw pump that delivers a constant volume with each stroke. Positive...
Positive EvidenceEvidence that tends to support the case for a candidate cause.
Positive FeedbackA process that results in an amplification of the response of a system to an external influence. For example...
Positive feedback loopA process in which one change leads to another, which then causes even more of the original change. In...
POSITIVE FILMFilm in which the dark portions of the original image appear dark and the light portions light.
Positive Pressure1. Condition that exists when more air is supplied to a space than is exhausted, so the air pressure within...
Positive Regulation of ApoptosisAny cellular process that increases the frequency, rate or extent of cell death by apoptosis.
Positive Test Result(1) Any resolvable gas chromatographic peak for any 2,3,7,8-HDD or HDF which exceeds the LOQ listed under §...
Positive-Pressure Fabric FilterFabric filter with the fans on the upstream side of the filter bags. [40 CFR 60.271a (CFR 2013)] [40 CFR...
Post AuditComparing model predictions to the observed results (a true post-audit) requires monitoring. IEMs provide...
Post Manufacturing ProcessProcesses which commonly follow the actual production of the product.
PostauditA subsequent examination and verification of model predictive performance following implementation of an...
Post-ChlorinationAddition of chlorine to plant effluent for disinfectant purposes after the effluent has been treated.
PostchlorinationThe addition of chlorine to the plant effluent, FOLLOWING plant treatment, for disinfection purposes.
Post-Closure1. The time period following the shutdown of a waste management or manufacturing facility; for monitoring...
Post-ConstructionSuperfund Post-Construction is a cleanup phase where several activities are generally undertaken at sites...
Post-Construction PhaseSuperfund Post-Construction is a cleanup phase where several activities are generally undertaken at sites...
Post-Consumer CoatingArchitectural coating that has previously been purchased by a consumer or distributed to a consumer but not...
Post-consumer contentMaterial from products that were used by consumers and would otherwise be discarded as waste. These materials...
Post-Consumer EmissionEmissions that occur after a consumer has used a product or material: generally, waste management emissions.
Post-Consumer EmissionsEmissions that occur after a consumer has used a product or material: generally, waste management emissions.
Post-Consumer MaterialWaste material generated by households or by commercial, industrial, and institutional facilities in their...
Postconsumer MaterialMaterial or finished product that has served its intended use and has been diverted or recovered from waste...
Post-consumer Materials1. Recovered materials from a consumer-oriented recycling collection system or drop-off center.
Postconsumer MaterialsA material or finished product that has served its intended use and has been diverted or recovered from waste...
Postconsumer Materials/WasteRefers to recovered materials that have been used as a consumer item and are diverted from municipal solid...
Postconsumer Recovered Fiber1. Paper, paperboard, and fibrous wastes from retail stores, office buildings, homes, and so forth, after...
Postconsumer Recovered Paper1. Paper, paperboard, and fibrous wastes from retail stores, office buildings, homes, and so forth, after...
Post-Consumer Recycling1. Use of materials generated from residential and consumer waste for new or similar purposes; e.g...
Post-Consumer Steel ScrapSteel scrap that is composed of materials made of steel that were purchased by households or by commercial...
Post-Consumer WasteMaterial or product that has served its intended use and has been discarded for disposal or recovery after...
Post-Decontamination Sampling1. Assessment of the body of data generated to verify that the originally contaminated environment has been...
PostemergenceRefers to the timing of pest control operations. Postemergence operations are accomplished during the period...
Postemergence HerbicideHerbicide applied to foliage after the crop has sprouted to kill or significantly retard the growth of weeds.
Posterior Chamber of EyeA space within the eye located between the iris and the lens. It is filled with aqueous humor.
Posterior DistributionA term from Bayesian statistics referring to a probability distribution that has been updated with new...
Postfire RunoffCombination of water and/or chemicals used to extinguish a fire, and additional particulate matter, that...
Postharvest TreatmentThe preparation of gathered or harvested commodities, such as food crops, feed crops or wood, for fresh...
Post-Impregnation Suspension ProcessManufacturing process in which polystyrene beads are first formed in a suspension process, washed, dried, or...
Postindustrial SocietySocial and cultural norms after the Industrial Revolution of 1750-1850, characterized by the changes made by...
Posting RestrictionRestriction on posting the comment/public submission details on Regulations.gov.
Post-injection site careAppropriate monitoring and other actions (including corrective action) needed following cessation of...
Post-Manufacture Marinizer1. Person who produces a marine diesel engine by substantially modifying a certified or uncertified complete...
Post-Milking Teat DipA product applied after milking to protect the teat from contagious pathogens that may have come into contact...
Post-Mining AreaA reclamation area or the underground workings of an underground coal mine after the extraction, removal, or...
Post-Refinery ComponentAny gasoline blending stock or any oxygenate which is blended with gasoline subsequent to the gasoline...
Post-Removal Site ControlThose activities that are necessary to sustain the integrity of a Fund-financed removal action following its...
PostScriptA page description language developed by Adobe Systems to describe a page image for printing. It handles both...
Post-Signing and Pre-Closing ConditionsA risk allocation tool used in property transactions which involves the requirement that some act be...
PosttestA test or measurement taken after services or activities have ended. It is compared with the results of a...
Post-Transcriptional RegulationAny subcellular or molecular event, process, or condition that regulates the processing of a gene...
Post-Translational ModificationThe enzymatic processing of a polypeptide chain after translation from messenger RNA and after peptide bond...
Post-Translational Protein Processing1. The enzymatic processing of a polypeptide chain after translation from messenger RNA and after peptide...
Post-Translational RegulationPost-Translational Regulation is controlled biochemical alteration of proteins involving generally reversible...
Postweaning Multisystemic Wasting SyndromeA worldwide emerging disease of weaned piglets first recognized in swine herds in western Canada in 1997...
Postwildfire RestorationLong-term process that focuses on repairing infrastructure and natural resource damage caused by the fire...
Potable Water1. Raw or treated water that is considered safe to drink.
Potable water reuse1. The use of highly treated recycled water for drinking water purposes. This reuse application includes both...
PotashPotash is used primarily as an agricultural fertilizer (plant nutrient) because it is a source of soluble...
PotassiumA metallic element that is important in body functions such as regulation of blood pressure and of water...
Potassium CarbonateThe dipotassium salt of carbonic acid with alkalinizing property.
Potassium Channel BindingA process that involves the binding of an ion, usually Ca++, Na+ or Cl-, to a potassium channel. These...
Potassium HydroxideA toxic and highly corrosive chemical used to make soap, in bleaching, and as a paint remover. It is used in...
Potassium NitrateA crystalline salt, KNO3; a strong oxidizer used especially in making gunpowder, as a fertilizer, and in...
PotencyAmount of material necessary to produce a given level of a deleterious effect.
Potential Asbestos-Containing Building Material DamageCircumstances in which:(1) Friable ACBM is in an area regularly used by building occupants, including...
Potential Asbestos-Containing Building Material Significant DamageCircumstances in which:(1) Friable ACBM is in an area regularly used by building occupants, including...
Potential Combustion Concentration1. Theoretical emissions (nanograms per joule (ng/J), lb/MMBtu heat input) that would result from combustion...
Potential Contamination for Listed Sensitive EnvironmentsFor listed sensitive environments, potential contamination is established if no portion of the sensitive...
Potential damageMeans circumstances in which: 1. Friable asbestos containing building material (ACBM) is in an area regularly...
Potential dose1. The amount of a compound contained in material swallowed, breathed, or applied to the skin.
Potential Electric OutputBase load rating design efficiency at the maximum electric production rate ( e.g., CHP units with condensing...
Potential Electrical Output Capacity1. 33 percent of the maximum design heat input capacity of the steam generating unit, divided by 3,413...
Potential EmissionsMaximum emissions of a pollutant from an OCS source operating at its design capacity. Any physical or...
Potential Harmful Algal Blooms (HABs)Harmful algal blooms are overgrowths of algae in water. Some produce dangerous toxins in fresh or marine...
Potential Hydrogen Chloride Emission ConcentrationHydrogen chloride emission concentration that would occur from combustion of municipal solid waste in the...
Potential Hydrogen Chloride Emission RateHydrogen chloride emission rate that would occur from combustion of MSW in the absence of any hydrogen...
Potential Hydrogen Chloride EmissionsLevel of emissions from a municipal waste combustion unit that would occur from combusting municipal solid...
Potential ImpactAll impacts that may occur given a projected change in climate, without considering...
Potential MalfunctionConditions have been detected that meet the OBD malfunction criteria but for which more drive cycles are...
Potential Mercury Emission ConcentrationMercury emission concentration that would occur from combustion of municipal solid waste in the absence of...
Potential Mercury EmissionsLevel of emissions from a municipal waste combustion unit that would occur from combusting municipal solid...
potential riskEstimated likelihood, or probability, of injury, disease, or death resulting from exposure to a potential...
Potential significant damageCircumstances in which: (1) Friable asbestos-containing building material (ACBM) is in an area regularly used...
Potential Sources of ContaminationA facility (a site known to hold or discharge a contaminant) or event (such runoff or a combined sewer...
Potential Sulfur Dioxide Emission ConcentrationSulfur dioxide emission concentration that would occur from combustion of municipal solid waste in the...
Potential Sulfur Dioxide Emission Rate1. Theoretical SO2 emissions (nanograms per joule (ng/J) or lb/MMBtu heat input) that would result from...
Potential Sulfur Dioxide EmissionsLevel of emissions from a municipal waste combustion unit that would occur from combusting municipal solid...
Potential to Emit1. Maximum capacity of a stationary source to emit a pollutant under its physical and operational design. Any...
Potentially Available Alternative1. Any alternative for which adequate health, safety, and environmental data, as required for the SNAP...
Potentially Cationic PolymerPolymer containing groups that are reasonably anticipated to become cationic. This includes, but is not...
Potentially Exposed PersonPerson who may be exposed to a chemical substance or mixture in a workplace as a result of a condition of use...
Potentially Exposed PopulationGroup of individuals within the general population identified by the Administrator who, due to either greater...
Potentially Responsible Parties1. Any individual or company--including owners, operators, transporters or generators--potentially...
Potentially Responsible Party1. A PRP is an individual or company (such as owners, operators, transporters, or generators of hazardous...
Potentially Responsible Party ActionSuperfund site cleanup actions by a potentially responsible party..
Potentially Responsible Party Community Involvement1. The community relations and EPA oversight activities of potentially responsible parties (PRPs) at a site...
Potentially Responsible Party Emergency RemovalThe Potentially Responsible Party has begun construction work on-site in response to an emergency incident...
Potentially Responsible Party Feasibility Study1. A study of a hazardous waste site conducted by a potentially responsible party to (1) evaluate alternative...
Potentially Responsible Party Long-Term Response ActionRemedial actions conducted by a potentially responsible party at a site involving treatment or other measures...
Potentially Responsible Party Remedial Action1. A PRP RA is the actual construction or implementation phase of a Superfund site cleanup that follows...
Potentially Responsible Party Remedial DesignPhase in Superfund site cleanup where the technical specifications for cleanup remedies and technologies are...
Potentially Responsible Party Remedial Investigation1. An investigation conducted by the potentially responsible party that is intended to gather the data...
Potentially Responsible Party Remedial Investigation/Feasibility Study1. The process of data collection and analyses of the site problem, identification of preliminary remedial...
Potentially Responsible Party Removal1. A PRP removal is a short-term cleanup conducted by the Potentially Responsible Party and is intended to...
Potentiation1. The effect of one chemical to increase the effect of another chemical.
Potentiometric Surface1. A surface that represents the level to which water will rise in tightly cased wells. If the head varies...
PotholingPractice of digging a test hole to expose a potential lead service line.
PotlineSingle, discrete group of electrolytic reduction cells electrically connected in series, in which alumina is...
PotomacThe Potomac River Basin. District of Columbia, Maryland, Pennsylvania, Virginia, West Virginia. Area = 14600...
Potomac Horse FeverAcute colitis in horses caused by Neorickettsia risticii.
PotroomBuilding unit which houses a group of electrolytic cells in which aluminum is produced.[40 CFR 60.191 (CFR...
Potroom GroupUncontrolled potroom, a potroom which is controlled individually, or a group of potrooms or potroom segments...
POTWThe term Publicly Owned Treatment Works or POTW means a treatment works as defined by section 212 of the Act...
POTW SubmissionRequest by a POTW for approval of a Pretreatment Program to the EPA or a Director; [40 CFR 403.3 (CFR 2017)]...
POTW Treatment Plant1. Portion of the POTW which is designed to provide treatment (including recycling and reclamation) of...
PoultA baby turkey.
PoultryProducts derived from the slaughter and processing of broilers, other young chickens, mature chickens, hens...
Poultry and Poultry ProductsDefined in the Poultry Products Inspection Act, 21 U.S.C. 453 et seq. [40 CFR 710.3 (CFR 2013)]
Poultry DiseasesDiseases of chickens, turkeys and other birds raised for their meat or eggs for human consumption; For the...
Poultry First ProcessingSlaughtering of poultry and producing whole, halved, quarter or smaller meat cuts.
Poultry Manure with LitterManure management system component that is similar to cattle and swine deep bedding except usually not...
Poultry Manure Without LitterManure management system component that may manage manure in a liquid form, similar to open pits in enclosed...
Pound per Square InchThe conventional unit for measuring pressure is "pound per square inch", which is abbreviated "psi". Pressure...
pounds per square inchA unit of pressure or pressure drop across a flow resistance. One psi is equivalent to the pressure exerted...
Pounds per Square Inch Gage PressureThe pressure within a closed container or pipe measured with a gage in pounds per square inch.
pounds per square inch (gauge)0 psig = 14.696 psia (psi absolute) = 1.0 atmosphere.
Pounds-basedRSEI produces three main types of results: pounds-based, hazard-based, and risk-related. Pounds-based results...
PouringOperating mode for a batch copper converter during which molten copper is removed from the vessel. [40 CFR...
Poverty LevelAn income level below which an individual or family is considered poor. The U.S. Census Bureau defines...
Poverty StatusDetermination of poverty level according to income level.
Poverty/income ratioRatio of reported family income to federal poverty level.
Powassan VirusEncephalitis caused by neurotropic viruses occuring in North America and Russia.
PowderState where all or part of the substance would have the potential to become fine, loose, solid particles.
Powder CoatingAny surface coating which is applied as a dry powder and is fused into a continuous coating film through the...
Powder Coating ProcessPowders of polymer resins are applied to metal surfaces using electrostatic spray deposition.
Powder FormingForming and compressing powder into a fully dense finished shape, and is usually done within closed dies.
Powdered Activated CarbonA highly adsorbent form of carbon used to remove odors and toxic substances from liquid or gaseous emissions...
Powder-TongueThe Powder and Tongue River Basins. Montana, Wyoming. Area = 18800 sq.mi.
Powdery MildewA fungus forming a white powdery coating on leaves and stems.
Powdery Mildew Disease(Diseases caused by) a fungus forming a white powdery coating on leaves and stems.
Power1. The power of a statistical test indicates the probability of rejecting the null hypothesis when it should...
Power AssemblyComponents of an engine in which combustion of fuel occurs, and consists of the cylinder, piston and piston...
Power CategorySpecific range of maximum engine power that defines the applicability of standards. For example, references...
Power Conditioning EquipmentElectrical equipment, or power electronics, used to convert power from a photovoltaic array into a form...
Power DensityMeaning given in § 1042.140.
Power Distribution SystemPortion of an electricity grid owned or operated by a utility that is dedicated to delivering electric energy...
Power Electronics ControllerThis unit manages the flow of electrical energy delivered by the traction battery, controlling the speed of...
Power FactorThe ratio of the true power passing through an electric circuit to the product of the voltage and amperage in...
Power HouseStructure that houses generators and turbines.
Power LoadAmount of electrical power delivered or required at any specific point or points on a system.
Power Plant EmissionPower plants are currently the dominant emitters of mercury (50 percent), acid gases (over 75 percent) and...
Power Plant PlumeAn exhaust plume originating from the stack of an electric power plant
Power ProducerBoiler unit producing electricity for sale to the grid. The term does not include units meeting the...
Power Purchase AgreementA type of contract that allows consumers, typically large commercial entities, to form an agreement with a...
Power Purchase CommitmentCommitment or obligation of a utility to purchase electric power from a facility pursuant to:(1) A power...
Power Sales AgreementLegally binding agreement between a QF, IPP, new IPP, or firm associated with such facility and a regulated...
Power Sector Greenhouse Gas Cap and Trade1. A power sector greenhouse gas (GHG) cap and trade program is a market-based policy tool for regulating GHG...
Power Take-OffSecondary engine shaft (or equivalent) that provides substantial auxiliary power for purposes unrelated to...
Power TakeoffA splined shaft that extends from a tractor drive train and is designed to couple with the splined drive...
PowerBuilder Librarya type of file
PowerPoint presentationA common trademarked and copyrighted production format for presentation graphics that provides the ability to...
PozzolanicSiliceous material which when combined with calcium hydroxide in the presence of moisture exhibits...
ppbA unit of measure expressed as parts per billion. Equivalent to 1 x 10⁻⁹.
ppmA unit of measure expressed as parts per million. Equivalent to 1 x 10⁻⁶.
pptA measurement of water salinity; stands for "parts per thousand."
Practicable Technology1. In the context of § 131.12(a)(2)(ii), means technologically possible, able to be put into practice, and...
Practicably ControllableThe ability of the federal agency to regulate in some way the emissions caused by the federal action.
Practical Enforceability1. Emission limitation or other standard is both legally and practicably enforceable as follows: (1) An...
Practical Extraction and Report LanguagePERL is a programming language developed from the C programming language and inheriting many attributes from...
Practical Knowledge1. Possession of pertinent facts and comprehension together with the ability to use them in dealing with...
Practical Quantification LimitThe lowest level that can be reliably achieved within specified limits of precision and accuracy during...
Practical Quantitation Level1. The lowest concentration that can be reliably measured within specified limits of precision and accuracy...
practical quantitation limit1. The lowest level of quantitation that can be reliably achieved within specified limits of precision and...
Practically Enforceable LimitationEmission limitation or other standard is both legally and practicably enforceable as follows: (1) An emission...
Pragmatic InteroperabilityContext of the information being exchanged
PrairieA plant community dominated by a diversity of perennial herbaceous plants growing between a majority of...
Prairie PotholeComplex of glacially formed wetlands, usually occurring in depressions that lack permanent natural outlets...
Prairie potholesDepressional wetlands (primarily freshwater marshes) found most often in the Upper Midwest region of the US.
Pre- and Post-Market Certification1. There are two types of certification: pre-market and after-market verification. In this case "market"...
Pre-analysis StandardA group of isotopically labeled compounds added at a known amount immediately prior to analysis and used to...
Preauthorization1. EPA's prior approval to submit a claim against the Fund for necessary response costs incurred as a result...
Preauthorized Response ActionResponse actions approved through the preauthorization process.
Pre-Award CostsPre-award costs are those incurred prior to the effective date of the Federal award directly pursuant to the...
Prebake ProcessMethod of primary aluminum reduction that uses an anode that was baked in an anode bake furnace, which is...
Pre-Biofuels LandscapeLandscape before the emphasis on growing crops to supply biofuels
Precast Concrete ManufacturingPrecasting is a manufacturing procedure whereas casting-in-place is a construction procedure
PrecastingPrecasting is a manufacturing procedure whereas casting-in-place is a construction procedure
Precautionary Principle1. When information about potential risks is incomplete, basing decisions about the best ways to manage or...
Pre-CERCLIS ScreeningSurveys conducted before EPA Superfund involvement.
Pre-Certification VehicleUncertified vehicle that a certificate holder employs in fleets from year to year in the ordinary course of...
Pre-Certification Vehicle EngineUncertified heavy-duty engine owned by a manufacturer and used in a manner not involving lease or sale in a...
Precession1. The wobble over thousands of years of the tilt of the Earth's axis with respect to the plane of the solar...
Pre-Charged Appliance1. Any appliance charged with fluorinated greenhouse gas refrigerant prior to sale or distribution or offer...
Pre-Charged Appliance ComponentAny portion of an appliance, including but not limited to condensers, compressors, line sets, and coils, that...
Pre-Charged Electrical EquipmentAny electrical equipment, including but not limited to gas-insulated substations, circuit breakers, other...
Pre-Charged Electrical Equipment ComponentAny portion of electrical equipment that is charged with SF6 or PFCs prior to sale or distribution or offer...
Pre-Charged EquipmentAny pre-charged appliance, pre-charged appliance component, pre-charged electrical equipment, or pre-charged...
Prechlorination1. (pre-SIP-uh-TATE) The addition of chlorine at the headworks of the plant PRIOR TO other treatment...
precious metalAny of several relatively scarce and valuable metals, such as gold, silver, and the platinum group metals.
Precious Metal ReclamationThe recycling and recovery of precious metals (i.e., gold, silver, platinum, palladium, iridium, osmium...
Precious Metals1. Any of several relatively scarce and valuable metals, such as gold, silver, and the platinum group metals.
Precious Metals ReclamationThe recycling and recovery of precious metals (i.e., gold, silver, platinum, palladium, iridium, osmium...
Precipitate1. An insoluble, finely divided substance which is a product of a chemical reaction within a liquid.
Precipitation1. In analytic chemistry, the process of producing a separable solid phase within a liquid medium.
Precipitation BathWater, solvent, or other chemical bath into which the polymer or prepolymer (partially reacted material)...
Precipitation Process1. The process by which atmospheric moisture falls onto a land or water surface as rain, snow, hail, or other...
Precipitation Rate (sprinkling)The surface application rate for landscape watering, usually expressed in inches per hour.
Precipitation Runoff1. Water, including rain and snow, which is not absorbed into the ground. Instead, it flows across the land...
Precipitation ScavengingGas and particle removal by atmosphere precipitation
Precipitation TypeThe process where water vapor condenses in the atmosphere to form water droplets that fall to the Earth as...
PrecipitatorPollution control device that collects particles from an air stream.
Precision1. The quality of being reproducible in amount or performance. With models and other forms of quantitative...
PrecoatCoating operation in which a coating other than an adhesive or release is applied to a surface during the...
Pre-Combustion EmissionThe GHG emissions that are produced by extracting, transporting, and processing fuels that are in turn...
Pre-Combustion EmissionsThe GHG emissions that are produced by extracting, transporting, and processing fuels that are in turn...
Precombustion EnergyThe extraction, transportation, and processing of fuels used for power generation, including adjusting for...
Pre-Commercial ThinningsTrees, including unhealthy or diseased trees, removed to reduce stocking to concentrate growth on more...
PreconcentratorDevice used to concentrate the target compound(s) while the bulk gases are effectively removed. The target...
Preconception Paternal ExposureExposure of the male parent to potentially harmful chemical, physical, or biological agents in the...
PreconditioningOperation of an automobile through one (1) EPA Urban Dynamometer Driving Schedule, described in 40 CFR part...
Pre-consumer contentExcess byproducts, or damaged materials, generated during manufacturing processes that are recovered and used...
Pre-Consumer MaterialMaterial diverted from the waste stream during the manufacturing process that could be used in a separate and...
Pre-consumer Materials1. Recovered materials obtained from manufacturers.
Preconsumer MaterialsMaterials generated in manufacturing and converting processes, such as manufacturing scrap and...
Preconsumer Materials/WasteRefers to materials generated in manufacturing and converting processes, such as manufacturing scrap and...
Pre-Consumer RecyclingRecycling of material (e.g., from within the manufacturing process) before it reaches the consumer.
Pre-Consumer Steel ScrapSteel scrap that is left over from industrial or manufacturing processes and which is subsequently recycled...
Pre-Convergence Voice & Video CommunicationsActivities to operate and maintain agency voice and video connectivity, including basic telephone service...
PrecordialPertaining to the region over the heart and lower part of the thorax
Precursor1. In photochemistry, a compound antecedent to a pollutant. For example, volatile organic compounds (VOCs)...
Precursor PollutantsAre: 1.)For ozone, nitrogen oxides (NOx), unless an area is exempted from NOx requirements under section...
Precursor, THM(pre-CURSE-or) Natural organic compounds found in all surface and groundwaters. These compounds MAY react...
Predation1. The act or practice of capturing another creature (prey) as a means for securing food.
Predator1. An animal that hunts for and eats other plants or animals.
Predatory BehaviorThe act or practice of capturing another creature (prey) as a means for securing food.
Pre-Design AssistanceProcurement of a design consultant for fund-financed design activities.
pre-development hydrologyThe runoff characteristics in a watershed before urban development in respect to the volume, rate, duration...
Predevelopment HydrologyThe combination of runoff, infiltration, and evapotranspiration rates and volumes that typically existed on a...
Prediction Interval1. A type of statistical interval that has a specified probability (commonly 95%) of enclosing the value of a...
Predictive Emission Monitoring SystemSystem that uses process and other parameters as inputs to a computer program or other data reduction system...
Predictive MethodAny method which makes use of known facts and models to infer future conditions or the results of experiments...
Predictive ModelingDeveloping models designed to forecast outcomes and future events.
Predictive Performance1. A causal hypothesis displays predictive performance if a prediction deduced from the hypothesis is...
Predictive ResearchResearch focused on predicting the future status of one or more dependent variables based on one or more...
PrednisoneA synthetic anti-inflammatory glucocorticoid derived from CORTISONE. It is biologically inert and converted...
Predominantly FreshwatersSurface waters in which the chloride concentration at the surface is less than 1,500 milligrams per liter.
PreemergenceRefers to the timing of pest control operations. Preemergence operations are accomplished during the period...
Preemergence HerbicideHerbicide applied to bare ground after planting the crop but prior to the crop sprouting above ground to kill...
Pre-Existing DischargeAny discharge resulting from mining activities that have been abandoned prior to the time of a remining...
Pre-extraction Filter Recovery StandardA group of isotopically labeled compounds added at a known amount to the filter used to indicate the...
Pre-extraction StandardA group of isotopically labeled compounds added in a known amount to the XAD-2 adsorbent resin of each sample...
Prefabricated BuildingStructures made in whole or in part to be transported to a building site and assembled there.
PrefaceThe author's own statement about the work; might include such information as the reasons for undertaking the...
PreflightingThe evaluation and analysis of every component in a file needed to produce a printing job. Preflight confirms...
Pregnancy DisordersA disorder that is related to pregnancy. Representative examples include ectopic pregnancy, toxemia of...
Pregnane-X-ReceptorOrphan nuclear receptor activated by pregnanes and other compounds including hyperforin, rifampicin &...
Pregnant Cyanide SolutionInorganic salts of hydrogen cyanide containing the -CN radical. The concept also includes isocyanides. It is...
Pregnant Solution TankStorage tank for pregnant solution, which is the cyanide solution that contains gold-cyanide complexes that...
Pre-Harvest IntervalThe time between the last pesticide application and harvest of the treated crops.
Preheater Tower Combustion Gas Monitoring LocationLocation within the preheater tower of a dry process cement kiln downstream (in terms of gas flow) of all...
Pre-Industrial SocietySocial and cultural norms prior to the Industrial Revolution of 1750-1850.
Preliminary AnalysisEngineering analysis performed by EPA prior to testing prescribed by the Administrator based on data and...
Preliminary ApprovalApproval granted by an authorized EPA representative prior to submission of an application for certification...
Preliminary Assessment1. The process of collecting and reviewing available information about a known or suspected waste site or...
Preliminary Assessment and Site InspectionA PA/SI is the process of collecting and reviewing available information about a known or suspected hazardous...
Preliminary Assessment/Site InspectionSee http://www.epa.gov/superfund/cleanup/pasi.htm. The Preliminary Assessment (PA) and Site Inspection (SI)...
Preliminary Close-Out Report PreparedA report prepared by the remedial program manager (RPM) verifying that physical construction of the remedy is...
Preliminary CrosswalkProvides an initial structure for a regulatory or statutory crosswalk so that when the regulations or...
Preliminary DataData that have not necessarily been subjected to review, quality control and/or documentation by a...
Preliminary Environmental AssessmentInitial screening and review stage for candidate sites to identify potential environmental issues related to...
Preliminary Environmental ReviewEnvironmental review described under that term in §8.6.
Preliminary Environmental Review MemorandumDocumentation supporting the conclusion of the preliminary environmental review that the impact of a proposed...
Preliminary InjunctionLegal action by judge to compel or prohibit action by responsible parties.
Preliminary Remediation GoalA chemical concentration in an environmental medium associated with a particular exposure scenario that is...
Preliminary Remediation GoalsInitial clean-up goals developed early in the remedy selection process based on readily available information...
Premanufacture NoticeAny notice submitted to EPA pursuant to section 5(a)(1)(A) of the Act in accordance with part 720 of this...
Premanufacture Notice ProgramDescribed in 40 CFR part 720, subpart A promulgated under the Toxic Substances Control Act, 15 U.S.C. 2601 et...
premature deathA death that occurs before statistical expectation, usually attributable to a specific cause, and usually...
Premature InfantA human infant born before 37 weeks of gestation.
Premature MortalityDeaths that occur before life expectancy is reached within a given population.
Pre-Milking Teat DipA product applied in preparation for milking to clean the teat and reduce the spread of disease and maintain...
PremisesThe particular location of property or a portion thereof as designated in a policy.
Premium1. An additional charge for real estate property with an amenity such as a water view or a view of wooded...
Premium Grade GasolineGasoline having an antiknock index, i.e., octane rating, greater than 90. This definition applies to the...
Premix Assist AirPortion of assist air that is introduced to the flare vent gas, whether injected or induced, prior to the...
PrenatalOccurring, existing, or performed before birth.
Prenatal ExposureContact with a substance in the period of time spanning conception to the beginning of labor.
Prenatal Phthalates ExposureThe consequences of exposing the fetus in utero to phthalates, a chemical found in plastics, which may lead...
Preneoplastic ChangeAny alteration in cell state that promotes or renders a cell or cell population more vulnerable or prone to...
Preparation lossesNet cooking losses, which include dripping and volatile losses, post cooking losses, which involve losses...
Preparation of Cost Document PackagePackage prepared in support of cost recovery actions containing site-specific cost documentation information...
Preparation PlantFacility where coal is subjected to chemical or physical processing or cleaning, concentrating, or other...
Prepare Financial ReportActivities to prepare timely and useful information to support the management's fiduciary role, budget...
Prepared Feeds Manufacturing FacilityFacility that is primarily engaged in manufacturing animal feed. A facility is primarily engaged in...
PreparednessActions taken to plan, organize, equip, train, and exercise to build and sustain the capabilities necessary...
PreplantRefers to the timing of pest control operations. Preplant operations are accomplished during the period...
Pre-Processed Shelled CornShelled corn delivered to a plant before processing.
Pre-productionThe technical preparation of verbal and visual elements of the final product before they move into actual...
PrerinseRinse, typically with hot or cold water, performed at the beginning of the cleaning sequence to remove...
Pre-sampling Adsorbent StandardA group of isotopically labeled compounds added in a known amount to the XAD-2 adsorbent prior to sampling...
Preschool ChildA child in the 2 to 5 year age range.
Prescribed BurnControlled application of fire to naturally occurring vegetative fuels under specified environmental...
Prescribed burning1. Deliberate setting and careful control of surface fires in forests to help prevent more destructive fires...
Prescribed fire1. A fire ignited on wildlands to meet a specific resource management objective such as fuel reduction or...
Prescribed Fire EmissionEmission from a fire ignited on wildlands to meet a specific resource management objective such as fuel...
Prescribed Interexchange ChargeThe charge the local exchange company assesses the long distance company when a consumer picks it as his or...
Prescription DrugDrugs that cannot be sold legally without a prescription.
Prescription DrugsDrugs that the FDA has determined must be used only under the direction and supervision of a licensed...
Prescription-Based Management ProgramA program designed to preserve and protect public health and water quality by specifying pre-engineered...
Prescriptive1. (pre-SKRIP-tive) Water rights which are acquired by diverting water and putting it to use in accordance...
Prescriptive regulationA policy that stipulates how much pollution an individual source or plant is allowed to emit and/or what...
Prescriptive RequirementsSpecifications for design, installation, and other procedures and practices for onsite or clustered...
PresedimentationPreliminary treatment process used to remove gravel, sand and other particulate material from the source...
Present Value1. Future expenditures expressed in current dollars by adjusting for a discount rate that accounts for...
PresentationsThis includes PowerPoint slides, recorded webinars, or other types of presentations that discuss issues...
preservation1. Protection of large areas of land from development.
Preservation MetadataData that support activities intended to ensure the long-term usability of a digital resource.
Preshipment ApplicationWith respect to class I, Group VI controlled substances, are those non-quarantine applications applied within...
PRESIDENTIAL RECORDSAccording to 44 U.S.C. 2201, the term "means documentary materials, or any reasonably segregable portion...
Presiding Officer1. Administrative Law Judge appointed under 5 U.S.C. 3105 and designated to preside at a hearing in an appeal...
Presolve WashUse of diesel, kerosene, gasoline, or any other type of fuel or solvent as a tank interior cleaning solution.
Press PredryerDryer used to reduce the moisture and elevate the temperature by applying heat to a wet-formed fiber mat...
Press proofa copy obtained from inked type, plate, block or screen for checking purposes; a reasonably accurate sample...
Press/Cooling VentAny opening through which particulate and gaseous emissions from plywood, particleboard, or hardboard...
Pressed and Blown Glass1. Glass which is pressed, blown, or both, including textile fiberglass, noncontinuous flat glass...
Pressed Wood ProductA group of materials used in building and furniture construction that are made from wood veneers, particles...
Pressed Wood Products1. A group of materials used in building and furniture construction that are made from wood veneers...
Pressure ContainerVessel that is used to store liquids or gases and is designed not to vent to the atmosphere as a result of...
Pressure ControlA switch which operates on changes in pressure. Usually this is a diaphragm pressing against a spring. When...
Pressure Decay CurveGraph of the reactor pressure versus time from the point when epoxide feed is stopped until the reactor...
Pressure DeformationApplying force (other than impact force) to permanently deform or shape a part. Pressure deformation may...
Pressure Distribution CirculationSurface winds driven by atmospheric pressure differences
pressure gradient1. A pressure differential in a given medium (e.g., water, air) which tends to induce movement from areas of...
Pressure Gradient ForceA three-dimensional force vector operating in the atmosphere that accelerates air parcels away from regions...
Pressure HeadThe vertical distance (in feet) equal to the pressure (in psi) at a specific point. The pressure head is...
Pressure RegulatorA post-meter device used to limit water pressure.
Pressure Release1. Emission of materials resulting from system pressure being greater than set pressure of the pressure...
Pressure Release Actuation EventEmission of materials resulting from the system pressure being greater than the set pressure of the pressure...
Pressure Relief Device1. Safety device used to prevent operating pressures from exceeding the maximum allowable working pressure of...
Pressure Relief Valve1. Safety device used to prevent operating pressures from exceeding the maximum allowable working pressure of...
Pressure Safety ValveSafety device used to prevent operating pressures from exceeding the maximum allowable working pressure of...
Pressure Sensitive TapeFlexible backing material with a pressure-sensitive adhesive coating on one or both sides of the backing...
Pressure SewersA system of pipes in which water, wastewater, or other liquid is pumped to a higher elevation.
Pressure, Static1. In flowing air, the total pressure minus velocity pressure, pushing equally in all directions.
Pressure, Total1. In flowing air, the sum of the static and velocity pressures.
Pressure Treatment ProcessWood treatment process involving an enclosed vessel, usually a retort, and the application of pneumatic or...
Pressure, Velocity1. In flowing air, the pressure due to velocity and density of air.
Pressure VesselStorage vessel that is used to store liquids or gases and is designed not to vent to the atmosphere as a...
Pressure-Assisted Multi-Point FlareFlare system consisting of multiple flare burners in staged arrays whereby the vent stream pressure is used...
Pressurized Dryer Breaching SealSeal system connecting the dryer transition pieces which is maintained at a higher pressure than the inside...
Pressurized Oil SystemSystem designed to deliver lubricating oil to internal engine components, including a step to circulate oil...
Pressurized RefinerPiece of equipment operated under pressure for preheating (usually by steaming) wood material and refining...
Pre-Stagnation FlushingOpening of tap(s) to flush standing water from plumbing prior to the minimum 6-hour stagnation period in...
PresteamRinse, typically with hot or cold water, performed at the beginning of the cleaning sequence to remove...
Presumptive Fee Calculation Regulated PollutantUsed only for purposes of § 70.9(b)(2), means any “regulated air pollutant” except the following:(1) Carbon...
Presumptive Remedies1. Presumptive remedies are preferred technologies for common categories of CERCLA sites that have been...
Presymptomatic IndividualIndividual who, although infected with a disease-causing organism, does not yet exhibit symptoms of the...
PretestA test or measurement taken before services or activities begin. It is compared with the results of a...
Pre-transport StandardSpiking compound from the list of alternative recovery standards that can be added by the laboratory to the...
Pretreatment1. Methods used by industry and other non-household sources of wastewater to remove, reduce, or alter the...
Pretreatment CoatingOrganic coating that contains at least 0.5 percent acids by weight and is applied directly to metal or...
Pretreatment Requirement1. Any substantive or procedural requirement related to Pretreatment, other than a National Pretreatment...
Pretreatment requirementsAny substantive or procedural requirement related to pretreatment, other than a national pretreatment...
Pretreatment standard1. Any regulation containing pollutant discharge limits promulgated by the EPA in accordance with section 307...
Pretreatment Standard for Existing Source1. Pretreatment standards for existing sources, under section 307(b) of the Act.
Pretreatment Standard for New Source1. Pretreatment standards for new sources, under section 307(c) of the Act.
Pretreatment Standards for Existing Sources1. Categorical standards and requirements applicable to industrial sources that began construction before the...
Pretreatment Standards for New Sources1. Categorical standards and requirements applicable to industrial sources that began construction after the...
Pretreatment SystemAny technology or combination of technologies that precedes discharge to a subsurface septic system or other...
Pretreatment Wash Primer1. Primer that contains a minimum of 0.5 percent acid, by weight, that is applied directly to bare metal...
Pretreatment Wash Primer Specialty CoatingAny coating that contains a minimum of 0.5 percent acid, by mass, and is applied only to bare metal to etch...
Prevalence1. The proportion of disease cases that exist within a population at a specific point in time, relative to...
prevalence rateThe proportion of persons in a population who have a particular disease or attribute at a specified point in...
Prevalence StudyAn epidemiological study which examines the relationships between diseases and exposures as they exist in a...
prevalence survey1. The measure of the current level of disease (s) or symptoms and exposures through a questionnaire that...
Prevalent Level SamplesAir samples taken under normal conditions.
Prevalent LevelsLevels of airborne contaminant occurring under normal conditions.
Prevent PollutionActivities that encourage voluntary reduction in the generation of wastes or the conservation of natural...
PreventionThe capabilities necessary to avoid, prevent, or stop a threatened or actual act of terrorism. For the...
Prevention of pollution1. Use of processes, practices, materials, or products that avoid, reduce, or control pollution, which may...
Prevention of Serious Deterioration PermitPermit issued under 40 CFR 52.21 or by an approved State.
Prevention of Serious Deterioration StationAny station operated for the purpose of establishing the effect on air quality of the emissions from a...
Prevention of Significant Deterioration1. Prevention of Significant Deterioration is a construction air pollution permitting program designed to...
Preventive MaintenanceRegular and systematic inspection, cleaning, and replacement of worn parts, materials, and systems...
Previously Certified GasolineGasoline or RBOB that previously has been included in a batch for purposes of complying with the standards in...
Previously ClassifiedProperly classified, according to § 372.22(b) under a given Standard Industrial Classification (SIC) code, as...
Previously Designated Diesel FuelDiesel fuel that has been previously designated and included by a refiner or importer in a batch for purposes...
Previously Developed SiteConsists of at least 75 percent of the site area that has preexisting paving, construction, or altered...
Previously Disturbed SoilAreas of soils disturbed by previous human development activities. Indicators of disturbed soils may include...
Previous-MIL-on Diagnostic Trouble CodeDTC that corresponds to a MIL-on DTC but is distinguished by representing a malfunction that the OBD system...
Prey1. A plant or animal that is hunted for and eaten by a predator.
Prey Animal1. An animal that is hunted and eaten by a predator
Price Analysis1. The process of evaluating a prospective price without regard to the contractor's separate cost elements...
Price Elasticity Of Demand1. A measure of the responsiveness of water usage to changes in price; measured by the percentage change in...
Price elasticity of supplyMeasures the relationship between changes in quantity supplied of a good and changes in its price. It is...
Primacy1. Primary enforcement authority for the drinking water program. Under the Safe Drinking Water Act, states...
Primacy State1. A State that has the responsibility and authority to administer EPA's drinking water regulations within...
Primarily Engaged in Manufacturing ProcessManufacturing, fabricating, or forging of one or more products listed in one of the nine metal fabrication...
Primary Active Wetted Bottom Ash System VolumeMaximum volumetric capacity of bottom ash transport water in all non-redundant piping (including...
Primary Activity CategoryCodes used to define a sample type and categories based on the media number in legacy STORET. View the entire...
Primary AirportAn airport defined at 49 U.S.C. 47102 (15).
Primary Aluminum ProductionMakes aluminum alloy ingots
Primary Aluminum Reduction PlantAny facility manufacturing aluminum by electrolytic reduction.[40 CFR 60.191 (CFR 2013)]
Primary BatteryBattery whose initial capacity cannot be restored by charging.
Primary Beryllium Production FacilityAny establishment engaged in the chemical processing of beryllium ore to produce beryllium metal, alloy, or...
Primary Calibration Standard1. A suspension prepared from the primary dilution stock standard suspension. The PCAL suspensions are used...
Primary ChamberChamber in an HMIWI that receives waste material, in which the waste is ignited, and from which ash is...
primary contactPerson(s) in direct contact or associated with a communicable disease case. [MERREA 2005]
Primary Control System1. Air pollution control system designed to remove gaseous and particulate flourides from exhaust gases which...
Primary Copper SmelterAny installation or any intermediate process engaged in the production of copper from copper sulfide ore...
Primary Data1. Data collected by the researcher specifically for the research project.
Primary data/analysisInformation gathered from observations or measurements of a phenomena or the surveying of respondents.
Primary Dilution Standard1. A solution containing method analytes prepared in the laboratory from Stock Standard Solutions. The PDS is...
Primary DisinfectionThe killing or inactivation of bacteria, viruses, and other potentially harmful organisms in drinking water.
Primary Drinking Water RegulationApplies to public water systems and specifies a contaminant level, which, in the judgment of the EPA...
Primary Ecological ProcessEcological processes including the water cycle (the capture, storage and redistribution of precipitation)...
Primary Effect1. An effect where the stressor acts on the ecological component of interest itself, not through effects on...
Primary ElementAn instrument which measures (senses) a physical condition or variable of interest. Floats and thermocouples...
Primary Emission1. Particulate matter emissions from the BOPF generated during the steel production cycle and captured by the...
Primary Emission Control SystemCombination of equipment used for the capture and collection of primary emissions (e.g., an open hood capture...
Primary enforcement responsibility1. The primary responsibility for administration and enforcement of primary drinking water regulations and...
Primary ExporterAny person who is required to originate the manifest for a shipment of hazardous waste in accordance with 40...
Primary fine particlesFine particles that are emitted directly from a source, such as construction sites, unpaved roads...
Primary FlareFirst flare in a cascaded flare system.
Primary flow contextConsisting of the flow directionality and the environmental compartment [Original source...
Primary Fuel1. Fuel that provides the principal heat input (i.e., more than 50 percent) to the device. To be considered...
Primary Fuel SupplyMain fuel type (expressed in mmBtu) consumed by an affected unit for the applicable calendar year.
Primary Industry Category1. Any industry category listed in the Natural Resources Defense Council (NRDC) settlement agreement [( NRDC...
Primary Intended Service ClassMeaning given in § 1036.140.[40 CFR 1036.801 (CFR 2013)]
Primary KeyIn relational database design, a primary key is a column or set of columns whose contents uniquely identify...
Primary Lead ProcessorAny facility engaged in the production of lead metal from lead sulfide ore concentrates through the use of...
Primary Lead ProductionStarts with concentrated lead ore.
Primary Lead Smelter1. Any installation or any intermediate process engaged in the production of lead from lead sulfide ore...
Primary Lead Smelting1. Any installation engaged in the production, or any intermediate process in the production, of zinc or zinc...
Primary Magnesium RefiningProduction of magnesium metal and magnesium metal alloys from natural sources of magnesium chloride such as...
Primary (magnetic field)The magnetic field generated by an EM transmitter. May induce a secondary magnetic field.
Primary Material Use50 percent or more of a material is used for a particular purpose.
Primary Metal CastMetal that is poured in the greatest quantity at an individual plant.
Primary Metal ManufacturingIndustries in the Primary Metal Manufacturing subsector smelt and/or refine ferrous and nonferrous metals...
Primary MillSteel hot forming operations that reduce ingots to blooms or slabs by passing the ingots between rotating...

2,732 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.