Environment terminology · MLC-0121

Environment terms: N (1,191)

Page 1 of 3

• N electrodeThe potential electrode distant from the A electrode in a resistivity device.
• "N" in 1 Million Cancer RiskA lifetime cancer risk of "N"-in-1 million (where "N" is a number) means that, for every 1 million people who...
• N040Barium compounds (except for barium sulfate (CAS No. 7727-43-7))
• N090Chromium compounds (except for chromite ore mined in the Transvaal Region of South Africa and the unreacted...
• N100Copper compounds (this category does not include copper phthalocyanine compounds that are substituted with...
• N150Dioxin and dioxin-like compounds (Manufacturing; and the processing or otherwise use of dioxin and...
• N511Nitrate compounds (water dissociable; reportable only when in aqueous solution)
• N95 Respirator MaskRespiratory protective devices designed to achieve a close seal around the nose and mouth to maintain...
• NA FORM 14028, INFORMATION SYSTEM DESCRIPTIONAn electronic records inventory form that may be used to provide the necessary data for NARA's initial...
• NA FORM 14097, TECHNICAL DESCRIPTION FOR TRANSFER OF ELECTRONIC RECORDS TO THE NATIONAL ARCHIVESA form that may be used to provide information to accompany the transfer of permanent electronic records to...
• NacelleThe body of a propeller-type wind turbine, containing the gearbox, generator, blade hub, and other parts.
• NAD+A coenzyme composed of ribosylnicotinamide 5'-diphosphate coupled to adenosine 5'-phosphate by pyrophosphate...
• NADHA coenzyme composed of ribosylnicotinamide 5'-diphosphate coupled to adenosine 5'-phosphate by pyrophosphate...
• NADP+1. Oxidized form of nicotinomide adenine dinucleotide phosphate.
• NADPH1. Reduced form of nicotinomide adenine dinucleotide phosphate, a small water soluble molecule that acts as a...
• NAICS CodeNorth American Industrial Classification System (NAICS) is a six-digit code that identifies industries. The...
• NailThe thin, horny plates that cover the dorsal surfaces of the distal phalanges of the fingers and toes of...
• Nail Polish RemoverProduct designed to remove nail polish or coatings from fingernails or toenails.
• Naked DNA VaccineRecombinant DNA vectors encoding antigens administered for the prevention or treatment of disease.
• NameEach control strategy is given a unique name, as is each control measure. Each name should be explanatory to...
• Named InsuredThe person (or persons) in whose names the insurance policy is issued.
• Nameplate Capacity1. Maximum electrical generating output (expressed in MWe) that a generator can sustain over a specified...
• Nameplate RatingManufacturer's maximum design capacity in horsepower (hp) at the installation site conditions. Starting from...
• NamespaceA namespace uniquely identifies a set of names such that there is no ambiguity when objects having different...
• NanobiologyField of study combining biology and physics which looks at how nature works on the nanometer scale...
• NanocapsuleNanometer-sized, hollow, spherically-shaped objects that can be utilized to encapsulate small amounts of...
• NanochemistryDiscipline focusing on the unique properties associated with the assembly of atoms or molecules on a...
• NanocompositeNanometer-scale composite structures composed of organic molecules intimately incorporated with inorganic...
• NanoconjugateTailored macromolecules harboring covalently-bound biologically active modules that target specific tissues...
• NanoelectronicsElectronics on a nanometer scale, whether by current techniques or nanotechnology; includes both molecular...
• NanofiberSubmicron-sized fibers with diameters typically between 50 and 500 nanometers. The very small dimension of...
• NanofiltrationA membrane filtration method used to remove particles as small as 1 nanometer (nm) from wastewater. This...
• NanomagnetismMagnetism of very fine particles (Nanomaterials with diameters between 1 and 100 nanometers)
• NanomaterialNanomaterials have at least one dimension that is less than approximately 100 nanometers.
• Nanomaterials (engineered)Engineered nanomaterials include a wide range of compounds that are intentionally manufactured in a research...
• Nanometer1. A length equal to one billionth of a meter. The nanometer, or nm, is a metric unit of length commonly used...
• NanometersA distance of one billionth of a meter. The nanometer (nm) is a common unit used to describe wavelengths of...
• Nanoparticle1. Free standing nanosized material, consisting of between tens to thousands of atoms.
• Nanoparticle CreationSynthesis of free standing nanosized material, consisting of between tens to thousands of atoms
• Nanoparticle SuspensionTheir small particle size (between 1 and 100 nanometers) and comparatively large surface area means that the...
• Nanoparticle Toxicity MechanismToxicity generally assumed to be associated with the generation of reactive oxygen species.
• NanoplasticsPlastic particles smaller than 1 nm
• NanoproductProduct that incorporate materials manufactured at the nano scale.
• Nanoscale materials (nanomaterials)Nanomaterials exhibit unique properties that can be defined by their small size, ≤ 100 nanometers in at least...
• Nanoscale Zero-Valent IronNanomaterial used for bench-scale research and for pilot-scale and full-scale cleanups. Zero-valent metals...
• NanoscienceThe extension of existing sciences into the realms of the extremely small, as in nanomaterials...
• NanosensorDevice for sensing radiation, forces, chemicals, or biological agents, in which some portion of a device...
• NanosimilarsCombination of generic drugs and nanocarriers.
• NanosphereSpherical particles of nanometer dimensions.
• NanostructureMaterials which have structured components with at least one dimension in the range of 1 to 100 nanometers...
• NanotechnologyTechnology development at the atomic, molecular, or macromolecular range of approximately 1-100 nanometers to...
• NanotubeTubular structure, carbon and non-carbon based, with dimensions in nanometer regime
• NanowasteWaste which contains particles which have at least one dimension that is less than approximately 100...
• NanowireHigh aspect ratio structures with nanometer diameters that can be filled (nanorods) or hollow (nanotubes)
• Naphtha1. A generic term applied to a petroleum fraction with an approximate boiling range between 122 and 400...
• NaphthalenesTwo-ring crystalline hydrocarbons isolated from coal tar. They are used as intermediates in chemical...
• NAPL Remediation TechnologyRemediates contaminated subsurface water contaminated by DNAPLs (dense non-aqueous phase liquids) or LNAPLs...
• NaproxenAn anti-inflammatory agent with analgesic and antipyretic properties. Both the acid and its sodium salt are...
• NarcoticAn agent that produces insensibility or stupor
• NarcoticsNarcotics include agents that cause somnolence or induced sleep ( stupor); natural or synthetic derivatives...
• NaresThe external openings on the top of the bill of birds; the external orifices of the nose; the nostrils.
• Narrative Biological CriteriaGeneral statements of attainable or attained conditions of biological integrity and water quality for a given...
• Narrative Criteria1. Nonquantitative guidelines that describe the desired water quality goals.
• Narrow-Web Flexographic PressFlexographic press that is not capable of printing substrates greater than 18 inches in width and that does...
• Nasal BoneOne of two small oblong bones placed side by side at the middle and upper part of the face.
• Nasal CartilageHyaline cartilages in the nose. There are five major nasal cartilages including two lateral, two alar, and...
• Nasal CavityThe proximal portion of the respiratory passages on either side of the nasal septum lying between the floor...
• Nasal ConchaThe scroll-like bony plates with curved margins on the lateral wall of the nasal cavity. Turbinates, also...
• Nasal MucosaThe mucous lining of the nasal cavity, including lining of the nostril (vestibule) and the olfactory mucosa...
• Nasal SeptumThe thin wall between the two nasal cavities.
• Nasopharynx1. The part of the pharynx in the back of the throat, at and above the soft palate. The nasopharynx is...
• Nastic MovementThe movement of plant parts in response to non-directional stimuli. The stimulus may be external, such as the...
• NATA Cancer RiskLifetime cancer risk from inhalation of air toxics, as risk per lifetime per million people. [EPA National...
• NATA Respiratory HIAir toxics respiratory hazard index (the sum of hazard indices for those air toxics with reference...
• National Academy of Sciences CommitteeGroup of qualified scientists designated by the National Academy of Sciences according to agreement under the...
• National Academy of Sciences/National Research Council1. The National Academy of Sciences/National Research Council (NRC) performs level 2 peer review to determine...
• National Air Data GroupNational Air Data Group (of EPA's Office of Air, OAQPS, located in RTP, NC). Manages the design, operation...
• National Air Toxics Trends StationNational air toxics trends stations. This network provides hazardous air pollution ambient data.
• National Allowance Data BaseData base established by the Administrator under section 402(4)(C) of the Act.
• National Ambient Air Quality StandardThe Clean Air Act requires EPA to set National Ambient Air Quality Standards for pollutants considered...
• National Ambient Air Quality Standards1. Maximum air pollutant standards that EPA set under the Clean Air Act for attainment by each state. The...
• NATIONAL AUDIOVISUAL CENTERA NARA-operated central clearinghouse for most current audiovisual materials produced by or for the Federal...
• National Center for Biotechnology InformationNCBI provides access to biomedical and genomic information.
• National Contingency Plan1. The NCP is formally known as the "National Oil and Hazardous Substances Pollution Contingency Plan, and is...
• National Core Monitoring StationNational Core multipollutant monitoring stations. Monitors at these sites are required to measure particles...
• National Corrective Action Prioritization System1. The National Corrective Action Prioritization System is used to rank and compare sites in the Corrective...
• National Emission Standard for Hazardous Air PollutantsNESHAP, or National Emission Standard for Hazardous Air Pollutants, is a technology-based standard of...
• National Emission Standards for Hazardous Air Pollutants1. Standards set by EPA under CAA to control emissions from specific industrial sources.
• National Emissions Inventory1. All of the data within the EIS data store at a particular point in time. It includes data submitted by...
• National Emissions Standards for Hazardous Air PollutantsEmissions standards set by EPA for an air pollutant not covered by NAAQS that may cause an increase in...
• National Environmental Education ActTo promote environmental education, and for other purposes.
• National Environmental Laboratory Accreditation ConferenceA voluntary organization of State and Federal environmental officials and interest groups purposed primarily...
• National Environmental Laboratory Accreditation ProgramThe overall National Environmental Laboratory Accreditation Program of which NELAC is a part. {ORD} {OW/EAD}...
• National Environmental Performance Partnership AgreementsSystem that allows states to assume greater responsibility for environmental programs based on their relative...
• National Environmental Policy ActTo establish a national policy for the environment, to provide for the establishment of a Council on...
• National Environmental Policy Act ProcessAll measures necessary for compliance with the requirements of section 2 and title I of NEPA.
• National Environmental Policy Act Process CompletionWith respect to FHWA or FTA, the point at which there is a specific action to make a determination that a...
• National Environmental Training AssociationA professional organization devoted to serving the environmental trainer and promoting better operation of...
• National Estuary ProgramA program established under the Clean Water Act Amendments of 1987 to develop and implement conservation and...
• National Functional GuidelinesA set of procedures for evaluating data acquired for EPA's Office of Superfund Remediation and Technology...
• national geodetic vertical datum of 1929A fixed reference adopted as a standard geodetic datum for elevations; it was determined by leveling networks...
• National Hydrography Dataset1. Comprehensive set of digital spatial data -- based on U.S. Geological Survey 1:100,000 scale topographic...
• National Information InfrastructureThe NII refers to a nationwide network of integrated telecommunications that connects people, businesses...
• National Institute for Occupational Safety and Health1. A part of the Centers for Disease Control and Prevention (CDC) and is the only federal Institute...
• National Institute of Environmental Health SciencesSee https://www.niehs.nih.gov/research/supported/centers/srp. The National Institute of Environmental Health...
• National Institute of Health Manuscript Submission SystemSystem that facilitates the submission process of peer-reviewed, accepted manuscripts for inclusion in PubMed...
• National Institute of Occupational Safety and HealthThe National Institute of Occupational Safety and Health is an organization that tests and approves safety...
• National Interim Primary Drinking Water RegulationsCommonly referred to as NIPDWRs.
• National Mobile Inventory Model1. Developed by EPA to estimate current and future emission inventories for onroad motor vehicles (MOBILE6)...
• National Municipal PlanA policy created in 1984 by EPA and the states in 1984 to bring all publicly owned treatment works (POTWs)...
• National Oil and Hazardous Substances Contingency PlanThe federal regulation that guides determination of the sites to be corrected under both the Superfund...
• National Oil and Hazardous Substances Pollution Contingency PlanThe NCP contains the regulations that implement the CERCLA response process. The NCP also provides...
• National Panel of Environmental ArbitratorsA panel of environmental arbitrators selected and maintained by the Association to arbitrate cost recovery...
• National Pollutant DischargeElimination System permit is the regulatory agency document issued by either a federal or state agency which...
• National Pollutant Discharge Elimination System1. The primary permitting program under the Clean Water Act which regulates all discharges to surface water.
• National Pollutant Discharge Elimination System Data GroupGroup of related data elements identified in Table 1 in appendix A to this part. These NPDES data groups have...
• National Pollutant Discharge Elimination System PermitPermit issued to a POTW pursuant to section 402 of the Act.
• National Pollutant Discharge Elimination System Permit IDA nine-character code used to uniquely identify a permitted NPDES facility. The NPDES permit program...
• National Pollutant Discharge Elimination System ProgramNational Pollutant Discharge Elimination System (Clean Water Act section 402); the Federal Sewage Sludge...
• National Pollutant Discharge Elimination System StateState (as defined in 40 CFR 122.2) or Interstate water pollution control agency with an NPDES permit program...
• National Pollutant Discharge Elimination System (Various)1. National program for issuing, modifying, revoking and reissuing, terminating, monitoring and enforcing...
• National Pollutant Discharge Elimination System-Regulated EntityAny entity regulated by the NPDES program.
• National Pollution Discharge Elimination System1. A national program under Section 402 of the Clean Water Act for regulation of discharges of pollutants...
• National Pollution Funds CenterEntity established by the Secretary of Transportation whose function is the administration of the Oil Spill...
• National Pretreatment Standard1. Any regulation promulgated by the EPA in accordance with Sections 307(b) and (c) of the CWA that applies...
• National Primary Drinking Water Regulation1. Any primary drinking water regulation contained in part 141 of this chapter.
• National Primary Drinking Water RegulationsLegally enforceable standards that apply to public water systems. These standards protect drinking water...
• National Priorities List1. A list of sites, many nominated by the states, for hazardous waste cleanup under Superfund.
• National Priorities List Responsible Party SearchThe National Priorities List (NPL) potentially responsible party (PRP) search is used to identify PRPs at a...
• National Program GuidanceGuidance issued by EPA’s National Program Managers for establishing and maintaining effective environmental...
• National Resource Trustee1. The President is required to designate in the NCP those federal officials who are to act on behalf of the...
• National Response Center1. The primary communications center operated by the U.S. Coast Guard to receive reports of major chemical...
• National Response PriorityPriorities during response actions
• National Response SystemMechanism for coordinating response actions by all levels of government in support of the OSC/RPM. The NRS is...
• National Response Team1. Representatives from 15 federal agencies with interests and expertise in various aspects of emergency...
• National Secondary Drinking Water RegulationsCommonly referred to as NSDWRs.
• National Security DisasterBombings, hijackings, cyber attacks and other acts of terrorism made against the United States including the...
• NATIONAL SECURITY EMERGENCYAny occurrence, including natural disaster, military attack, technological emergency, or other emergency...
• National Security Exemption1. Exemption granted under § 90.1004(b) for the purpose of national security.
• National Security InformationAs used in this order this term is synonymous with ‘‘classified information.’’ It is any information which...
• National StandardEither a primary or secondary standard.
• National Strike Force1. Operated by the U.S. Coast Guard, the NSF is composed of three strategically located teams (Atlantic...
• National Strike Force Coordination CenterAuthorized as the National Response Unit by CWA sections 311(a)(23) and (j)(2), means the entity established...
• National Technology Transfer & Advancement ActTo amend the Stevenson-Wydler Technology Innovation Act of 1980 with respect to inventions made under...
• national tidal datum epochThe latest 19-year time period over which NOAA has computed and published official tidal datums and local...
• National Toxics InventoryThe NTI database is an inventory of stationary and mobile sources that emit hazardous air pollutants in all...
• NationalityThe status of belonging to a particular nation by birth, origin or naturalization.
• National-Scale Air Toxics AssessmentEPA's ongoing thorough review of air toxics in the United States. NATA results help scientists focus on...
• National-Scale Air Toxics AssessmentsThe predecessor to AirToxScreen. EPA performed six National Air Toxics Assessments for emissions years 1996...
• Nationwide permitA general permit that authorizes activities across the country, unless a district or division commander...
• NativeA plant or animal that is an original inhabitant of where you live.
• Native AlleleVariant of a native gene that is identified in the genetic diversity of plants sexually compatible with the...
• Native AmericanAny individual who is an American Indian, Eskimo, Aleut, or Native Hawaiian.
• Native Compound1. A molecule in which the atoms all have naturally occurring isotopic abundances. {OW/EAD} {OPP}
• Native ElementsSubstances naturally present in rocks which are not in chemical compounds, but which consist of only one...
• Native filesThe files that were used to originally create the document, i.e., Photoshop, Illustrator, Word, etc.
• Native formatThe default file format used by a specific software application.
• Native GeneGene that is identified in the recipient plant or source plants that are sexually compatible with the...
• Native HawaiianA person having origins in any of the original peoples of Hawaii, Guam, Samoa, or other Pacific Islands. It...
• Native Hawaiian or Other Pacific IslanderA person having origins in any of the original peoples of Hawaii, Guam, Samoa, or other Pacific Islands. It...
• Native InvasiveA native plant that has migrated to a site where it was not a part of the original plant community, or a...
• Native Landscaping1. Landscaping only by using native plants.
• Native LoadThe end-use customers that the Load-Serving Entity is obligated to serve.
• Native Nuisance AnimalAquatic animals that are native to the region (not brought in from elsewhere) but have become too crowded in...
• Native Nuisance PlantAquatic plants that are native to the region (not brought in from elsewhere) but have become too crowded in...
• Native PlantPlants native to the EPA Level III ecoregion of the site or known to naturally occur within 200 miles of the...
• Native Plant CommunityPlant species, composition, and structure typical of communities native to the EPA Level III ecoregion or...
• Native plantsPlants that have evolved over thousands of years to be able to survive in a particular region, and have...
• Native PopulationPeople born in either the United States, Puerto Rico, or a U.S. Island Area such as Guam or the U.S. Virgin...
• Native species1. A species that is native to the Chesapeake Bay region. It evolved on the North American continent and was...
• Natric HorizonThe natric (modified from natrium, sodium; implying the presence of sodium) horizon is a special kind of...
• NaturalA state that occurs in the absence of human actions; natural conditions can be approximated but never...
• Natural Attenuation or Natural RecoveryThe break down of contaminants due to physical, chemical and biological processes which occur in the...
• Natural Attenuation ProcessRefers to the reliance on natural attenuation processes (within the context of a carefully controlled and...
• Natural background levelsChemical, physical, and biological levels representing conditions that would result from natural processes...
• Natural Capital1. An extension of the economic concept of capital (manufactured means of production) to ecosystem goods and...
• Natural Climate RecordA record of climatic events found by examining the natural environment (tree rings, coral growth bands...
• Natural Condition1. Naturally occurring phenomena that reduce visibility as measured in terms of light extinction, visual...
• Natural DikeA tabular, igneous intrusion that cuts across the bedding or foliation of the country rock. Dikes are often...
• Natural Disaster1. This term is broadly defined to include disasters and emergencies that may be caused by any natural event...
• Natural Disaster Debris1. Refers to wastes resulting from earthquakes, floods, hurricanes, tornados, and other natural disasters...
• Natural Disaster ResponseActions to counter the environmental and human health impacts of natural disasters such as volcanic...
• Natural DisastersThis term is broadly defined to include disasters and emergencies that may be caused by any natural event. A...
• Natural DisinfectionThis is filtration by the movement of surface water through the subsurface to a well, infiltration gallery...
• Natural Draft Opening1. Any opening in a room, building, or total enclosure that remains open during operation of the facility and...
• Natural Draft Process HeaterAny process heater in which the combustion air is supplied under ambient or negative pressure without the use...
• Natural EnemySomething existing in nature that kills or eats an organism.
• Natural Event/Process1. Event in which human activity plays little or no direct causal role.
• Natural Gas1. Underground deposits of gases consisting of 50 to 90 percent methane and small amounts of heavier gaseous...
• Natural Gas Combustion EmissionEmission caused by the burning of natural gas (methane). The burning needed to generate energy releases...
• Natural Gas Commercial Pipeline SystemOne or more connected pipelines that transport natural gas that meets all the following: (1) The natural gas...
• Natural Gas Distribution FacilityFor purposes of reporting under this subpart and for the corresponding subpart A requirements means the...
• Natural Gas Driven Pneumatic PumpPump that uses pressurized natural gas to move a piston or diaphragm, which pumps liquids on the opposite...
• Natural Gas Dual Fuel AutomobileAutomobile:(1) Which is designed to operate on natural gas and on gasoline or diesel fuel;(2) Which provides...
• Natural Gas EmissionEmission of underground deposits of gases which consist of 50 to 90 percent methane and small amounts of...
• Natural Gas EngineEngine which uses compressed natural gas as fuel
• Natural Gas Liquid1. Petroleum that occurs naturally as a gas in the reservoir, but as a liquid under surface conditions...
• Natural gas liquidsThose hydrocarbons in natural gas that are separated as liquids from the gas. Includes natural gas plant...
• Natural Gas Liquids Forced ExtractionRemoval of ethane or higher carbon number hydrocarbons existing in the vapor phase in natural gas, by...
• Natural Gas Pipeline System1. A continuous pipe conduit, complete with such equipment as valves, compressor stations, communications...
• Natural Gas Pipeline Transportationmovement of natural gas through an interconnected network of compressors and pipeline components, including...
• Natural Gas Power PlantAn electricity generation plant which uses natural gas as its fuel
• Natural Gas Processing Plant1. Facilities designed to recover natural gas liquids from a stream of natural gas that may or may not have...
• Natural Gas Production Facility1. For the purpose of a major source determination, means natural gas transmission and storage equipment that...
• Natural Gas Production Source Category1. Natural gas production, which includes the well and extends to the point of custody transfer to the...
• Natural Gas SendoutIn the context of a local distribution company, the total deliveries of natural gas to customers over a...
• Natural Gas Transmission and Storage SegmentTransport or storage of natural gas prior to delivery to a “local distribution company custody transfer...
• Natural Gas Transmission EquipmentPipelines used for the long distance transport of natural gas (excluding processing). Specific equipment used...
• Natural Gas Transmission PipelinePipelines used for the long distance transport of natural gas (excluding processing). Specific equipment used...
• Natural Gas Working LossNatural gas emissions from fixed roof tanks resulting from evaporative losses during filling and emptying...
• Natural Gas-Driven Diaphragm PumpPositive displacement pump powered by pressurized natural gas that uses the reciprocating action of flexible...
• Natural Gas-Driven Piston PumpPositive displacement pump powered by pressurized natural gas that moves and pressurizes fluid by using one...
• Natural Gas-Driven Process ControllerProcess controller powered by pressurized natural gas. [40 CFR 60.5430b (CFR 2024)]
• Natural Gas-Fired Electric Utility Steam Generating Unit1. Electric utility steam generating unit meeting the definition of “fossil fuel-fired” that is not a...
• Natural Gas-Fired EngineGreater than or equal to 90% of the engine's heat input, excluding recirculated or recuperated exhaust heat...
• Natural Gas-Fired Steam Generating Unit1. Electric utility steam generating unit meeting the definition of “fossil fuel-fired” that is not a...
• Natural Gas-Fueled AutomobileAutomobile designed to operate exclusively on natural gas.
• Natural GasolineMixture of liquid hydrocarbons (mostly pentanes and heavier hydrocarbons) extracted from natural gas. It...
• Natural HazardMeteorological, climatological, environmental or geological phenomena that have the potential for negative...
• Natural History of DiseaseTemporal course of disease from onset (inception) to resolution.
• Natural Horizontal Gene TransferThe transmission of genetic information between organisms, related or unrelated, circumventing...
• Natural infrastructureNatural physical systems that support life, such as water cycles, nitrogen cycles and water purification.
• Natural Lagoon1. Lagoons tend to be shallow, highly enclosed, with reduced exchange with the ocean, often experiencing high...
• Natural lakeThose without evidence of a dam or where available information indicated the lake was natural even if a dam...
• Natural LandscapingLandscaping in a way that tries to capture the character and spirit of nature in a designed landscape by...
• Natural Language ProcessingNatural language processing is the process of converting human language into a language understandable to...
• Natural LeveeAn embankment of sediment, bordering one or both sides of a submarine canyon, fan valley, deep-sea channel...
• Natural lighting/daylightingThe use of windows and skylights to bring more natural light into a home. Can also refer to architectural...
• Natural nutrient sourceSources of naturally derived nitrogen and phosphorus. Nitrogen and phosphorus are nutrients that are natural...
• Natural Organic Matter1. Complex organic compounds that are formed from decomposing plant animal and microbial material in soil and...
• Natural RegenerationRenewal of the forest achieved either by natural seeding or from the vegetative reproduction of plants on the...
• natural resource1. Anything obtained from the physical environment to meet human needs.
• Natural Resource Conservation1. Conserving natural resources and energy use by managing materials more efficiently. Three primary...
• Natural Resource Damage AssessmentAn assessment or measurement of the losses suffered by the public when public air, water, lands, plants, or...
• Natural Resource Damage LiabilityLegal accountability for the damage to any natural resource
• Natural Resource Damage ModelingRepresentation of processes that damage natural resources
• Natural Resource ExtractionTaking natural resources out of the environment. Often refers to taking minerals from the ground, e.g. mining.
• Natural Resource ManagementThe application of scientific and technical principles in the management of natural resources, such as land...
• Natural Resource ZoningA blanket term used to refer to all zoning which restricts the uses that are made of natural resource lands...
• Natural Resources1. Natural Resources includes all activities involved in conservation planning, land management, and national...
• Natural Resources Conservation ServiceAn agency of the U.S. Department of Agriculture.
• Natural Resources DamageSee http://www.epa.gov/oerrpage/superfund/programs/nrd/index.htm. Natural Resources Damages (NRD) are defined...
• Natural RubberA high-molecular-weight polymeric elastomer derived from the milk juice ( LATEX) of HEVEA brasiliensis and...
• Natural SlackA long, narrow, generally shallow trough-like depression between two beach ridges and aligned roughly...
• natural source1. Non-manmade emission sources, including biological (biogenic sources such as plants) and geological...
• Natural Source EmissionA term used in this report to describe any air emissions source of natural origin. Examples include...
• Natural SwaleA long, narrow, generally shallow trough-like depression between two beach ridges and aligned roughly...
• Natural Swale/SlackA long, narrow, generally shallow trough-like depression between two beach ridges and aligned roughly...
• Natural System Processes ModelNatural systems processes modeling simulates the dynamics of ecosystems that directly or indirectly give rise...
• Natural Thermal Stratification1. Naturally-occurring division of a waterbody into horizontal layers of differing densities as a result of...
• Natural VariabilityVariations in the mean state and other statistics (such as standard deviations or statistics of extremes) of...
• Natural Ventilation1. Air circulation is provided by opening barn doors or windows and allowing the wind to draw through the...
• Natural VisibilityVisibility (contrast, coloration, and texture) on a day or days that would have existed under natural...
• Natural Visibility ConditionAverage of individual values of daily natural visibility unique to each Class I area for either the most...
• Natural WallA relatively straight, cliff-like face or slope of considerable linear extent, which breaks up the general...
• Natural WatersFlowing water within a physical system that has developed without human intervention, in which natural...
• Natural WetlandsNaturally-occurring (not created by humans) tidal and nontidal areas characterized by saturated or nearly...
• Naturally Occurring Radioactive MaterialMaterials found in nature that emit ionizing radiation that have not been moved or concentrated by human...
• Naturally Occurring Radioactive Materials1. Materials found in nature that emit ionizing radiation that have not been moved or concentrated by human...
• Navicular DiseaseChronic inflammation of the navicular bone and bursa of the front foot in horses, causing lameness and a...
• NavigableThose waters that are subject to the ebb and flow of the tide and/or are presently used, or have been used in...
• Navigable Waters1. Traditionally, waters sufficiently deep and wide for navigation by all, or specified vessels; such waters...
• Navigable Waters of the United States“Navigable waters” as defined in section 502(7) of the FWPCA, and includes:(1) All navigable waters of the...
• Navigational Aids Specialty CoatingAny coating applied to Coast Guard buoys or other Coast Guard waterway markers when they are recoated aboard...
• n-ButaneParaffinic straight-chain hydrocarbon with molecular formula C4H10.
• n-ButyleneOlefinic straight-chain hydrocarbon with molecular formula C4H8.
• NCD datasetThe set of ten tables and referenced external files that include a State's activity data and that are...
• NDThis indicates that the limitation is no detectable amount.
• Near Commercial BuildingsWithin the interior of, on the roof of, attached to the exterior wall of, in the parking area serving, or...
• Near First Service ConnectionAt one of the 20 percent of all service connections in the entire system that are nearest the water supply...
• Near Infrared Reflective GlazingSurface coverage applied to glass to block out certain light rays.
• Near MissIncidents where no property was damaged and no personal injury sustained, but where, given a slight shift in...
• Near Roadway EmissionRoadway-related traffic emissions and related air pollution concentrations nearby
• Near the First Service ConnectionAt one of the 20 percent of all service connections in the entire system that are nearest the water supply...
• Nearby hazardA potential risk or hazard located outside of the site property boundary. Determining what is nearby depends...
• Nearby IndividualResident or student with the shortest travel distance to any area of observed contamination. If one or more...
• Nearby PopulationTotal number of people who live or attend school within a one-mile travel distance of an area of observed...
• Nearest Intake FactorFactor for evaluating the maximally exposed intake. This factor is based on the presence of actual...
• Nearest Onshore AreaWith respect to any existing or proposed OCS source, the onshore area that is geographically closest to that...
• Nearest Well FactorFactor for evaluating the maximally exposed well. This factor is based on the presence of actual...
• Nearest-Neighbor RuleType of statistical decision-making rule in which an object is assigned the same characteristics as its...
• Near-Infrared SpectroscopyMethod of chemical analysis using spectroscopic techniques in the near-infrared portion of the spectrum (700...
• Near-Road Nitrogen Dioxide MonitorAny NO2 monitor meeting the specifications in 4.3.2 of appendix D and paragraphs 2, 4(d), 6.1, and 6.4 of...
• Nearshore1. The relatively shallow waters between the shoreline and deeper, open waters.
• Nearshore Ocean1. Nearshore Area
• Nearshore Ocean CurrentA current caused principally by waves breaking along a shore.
• Nearshore Operating AreaOperating area defined as extending seaward 12 miles from the boundary lines defined in 46 CFR part 7, except...
• Nearshore Terrestrial EcosystemThe land area directly influenced by the presence of the lakes through physical processes or climate...
• nearshore terrestrial ecosystemsThe land area directly influenced by the presence of the lakes through physical processes or climate...
• nearshore zone1. The zone extending from the shoreline seaward to a short, but indefinite distance offshore, typically...
• Neat FuelFuel that is free from mixture or dilution with other fuels. For example, hydrogen or natural gas fuel used...
• Neat Oil1. Pure oil with no or few impurities added. In nonferrous metals forming, its use is mostly as a lubricant.
• Neat Renewable Fuel1. Renewable fuel to which only de minimus amounts of conventional gasoline or diesel have been added.
• Neat SoapSolution of completely saponified and purified soap containing about 20-30 percent water which is ready for...
• Necessary CauseCausal factor whose presence is required for the occurrence of the effect (of disease).
• Necessary Cost“Necessary response costs” as required by section 111(a)(2) of CERCLA for Fund reimbursement of a...
• Necessary Response Cost1. Costs determined to be:(1) Required (based upon the site-specific circumstances);(2) Reasonable (nature...
• NechesThe Neches River Basin above Sabine Lake. Texas. Area = 10000 sq.mi.
• NeckThe region that connects the head to the rest of the body.
• Neck of a RipThat part of a rip current circulation located in the surf zone, marked by a narrow band of swiftly moving...
• NeckingNeck formation caused by an instability in tensile deformation.
• NecrophagyScavenging behavior of feeding on dead animal flesh, carrion
• Necropsy1. A post-mortem examination or inspection to determine the cause of death or the nature of pathological...
• Necrosis1. Death of plant or animal cells or tissues. In plants, necrosis can discolor stems or leaves or kill a...
• Necrotrophic FungusFungus that attacks and kills the cells of a living host and then uses the nutrients from those cells
• Nectar FeedingConsuming the sugary liquid secreted by many flowers.
• NeedleA long, slender leaf found on loblolly pines and other evergreens.
• Needle PeakPersistent levels of peak demand that drive the capacity needs of a water system despite reductions in...
• Needle PeaksPersistent levels of peak demand that drive the capacity needs of a water system despite reductions in...
• Needle ValveA valve where the closure element is a small tapered plunger.
• Needs AssessmentA systematic process for gathering information about current conditions within a group that underlie the need...
• Negative Binomial DistributionA discrete statistical distribution whose variable has two possible values, "success" and "failure," and...
• Negative CatalystChemical substance that decreases a reaction rate.
• Negative Control1. A control with a known negative outcome.
• Negative CreditEmission exceedances above the standard.
• Negative EvidenceEvidence that tends to refute or weaken the case for a candidate cause.
• Negative FeedbackA process that results in a reduction in the response of a system to an external influence. For example...
• NEGATIVE FILMFilm in which the dark portions of the original image appear light and the light portions dark. Used as the...
• Negative Pressure1. A condition that exists when less air is supplied to a space than is exhausted from the space, so the air...
• Negative Regulation of ApoptosisAny cellular process that decreases the frequency, rate or extent of cell death by apoptosis.
• Negative Regulation of Degradation of Adhesion FactorAdhesion Factor Stabilization inhibits conjugation, transport, oxidation, or proteolysis of cell surface...
• Negative Regulation of Degradation of AntibodyAntibody Stabilization inhibits conjugation, transport, oxidation, or proteolysis of a class of cell-surface...
• Negative Regulation of Degradation of ComplementComplement Stabilization inhibits conjugation, transport, oxidation, or proteolysis of complement system...
• Negative Regulation of Degradation of CytokineCytokine Stabilization inhibits conjugation, transport, oxidation, or proteolysis of a class of soluble...
• Negative Regulation of G1 PhaseG1 Arrest consists of cellular biochemical mechanisms, responsive to diverse governing conditions (DNA...
• Negative Regulation of G1 to S TransitionG1-S Arrest consists of cellular biochemical mechanisms, responsive to diverse governing conditions (DNA...
• Negative Regulation of G2 PhaseG2 Phase Arrest consists of interference with, or restraint of, activities that regulate the cellular...
• Negative Regulation of G2 to M TransitionG2/M Arrest consists of cellular biochemical mechanisms, responsive to diverse conditions, that control...
• Negative Regulation of Hemolytic ProcessAny process that decreases the frequency, rate or extent of hemolysis.
• Negative Regulation of Immune Cell DestructionAny process that decreases the frequency, rate or extent of apoptosis in leukocytes.
• Negative Regulation of Lymphocyte Apoptotic ProcessAny process that decreases the frequency, rate or extent of apoptosis in B cells, T cells or natural killer...
• Negative Regulation of Microtubule DepolymerizationAny microtubule process that stops, prevents or reduces the frequency, rate or extent of microtubule...
• Negative Regulation of Microtubule PolymerizationAny microtubule process that stops, prevents or reduces the frequency, rate or extent of microtubule...
• Negative Regulation of Myeloid Cell Apoptotic ProcessAny process that decreases the frequency, rate or extent of apoptosis in neutrophils, eosinophils or...
• Negative Regulation of S PhaseS Phase Arrest consists of interference with, or restraint of, activities that regulate the cellular capacity...
• Negative-Pressure Fabric FilterFabric filter with the fans on the downstream side of the filter bags. [40 CRF 60.271a (CFR 2013)] [40 CFR...
• NegligenceFailure to use the degree of care which an ordinary person of reasonable prudence would use under the given...
• Negligible ResidueAny amount of a pesticide chemical remaining in or on a raw agricultural commodity or group of raw...
• Negotiated Indirect Cost Rate AgreementThe documentation that issues the reimbursement rate(s) negotiated between the Federal government and a...
• NEGOTIATIONThe process of give and take by assistance Project Officers and applicants to agree on work plans and funds...
• Negotiation (Generic)1. This action is used to describe negotiations that cover any combination of remedies or statutes...
• Negotiations (Under Superfund)After potentially responsible parties are identified for a site, EPA coordinates with them to reach a...
• NEI Input Format Version 3.0The format used to report NEI data in 2005 and earlier cycles.
• NEI on the NETEPA internal query reporting system for the National Emissions Inventory.
• NEI Output FormatPrevious format used for distribution and publishing NEI data.
• Neighborhood EffectIncreased impact of landscape features located in the immediate neighborhood of a focal patch compared with...
• Neighboring CompanyAny one of those electric utility companies with one or more electric power interconnections to the principal...
• Neighboring Waters1. (A) All waters located within 100 feet of the ordinary high water mark of a water identified in paragraphs...
• Nekton1. Organisms that are able to swim through the water column and move against currents. Nekton include fish...
• NEMA 14-50NEMA 14-50 outlet is rated at 50 amps and 240V. These outlets are commonly used to power recreational...
• NEMA 5-15NEMA 5-15 outlet is the standard 15 amp, 125V outlet found in most homes. This outlet is normally used to...
• NEMA 5-20NEMA 5-20 outlet is a 20 amp, 125V outlet commonly found in homes and offices.
• NematicidesKill nematodes (microscopic, worm-like organisms that feed on plant roots).
• Nematocide1. Chemical for the control of parasitic worms
• Nematocyst1. Stinging cells found on jellyfish and anemones. The "sting" is caused by a coiled, thread-like tube that...
• NematodaA class of unsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmetry of the...
• NematodeUnsegmented helminths with fundamental bilateral symmetry and secondary triradiate symmetry of the oral and...
• NematodesRoundworms, any of which are pathogenic for plants and sometimes animals.
• Nematophagous FungusCarnivorous fungus that traps and feeds on nematodes
• Neo-bulkUniformly packaged goods, such as wood pulp bales, which stow as solidly as bulk, but are handled as general...
• Neonatal Infectious DisordersAn infectious disorder that occurs during the neonatal period. Representative examples include streptococcal...
• NeonateAn infant during the first month after birth.
• NeonicotinoidsA class of insecticides that are structurally similar to NICOTINE and have physiologically similar effects as...
• Neoplasm1. An abnormal growth of tissue that may be benign or malignant.
• Neoplastic Cell TransformationCell changes manifested by escape from control mechanisms, increased growth potential, alterations in the...
• Neoplastic ProcessThe pathological mechanisms and forms taken by tissue during degeneration into a neoplasm and its subsequent...
• NeoprenePolymer of chloroprene (2-chloro-1,3-butadiene). The free radical emulsion process is generally used to...
• Neorickettsia risticiiA species of gram-negative bacteria in the genus NEORICKETTSIA, family ANAPLASMATACEAE.
• Neosho-VerdigrisThe Neosho and Verdigris River Basins. Arkansas, Kansas, Missouri, Oklahoma. Area = 20500 sq.mi.
• NeovascularizationThe formation of new or recent blood vessels. The vasculature network is critical to the development of...
• NEPA Official1. Assistant Administrator for Enforcement and Compliance Assurance, who is responsible for EPA’s NEPA...
• Nepheloid LayerLayer of water that contains a high concentration of silt and sediment - usually at the benthic-water column...
• Nephelometric1. (NEFF-el-o-MET-rick) A means of measuring turbidity in a sample by using an instrument called a...
• Nephelometric Turbidity UnitThe unit of measure for turbidity.
• NephronThe functional units of the kidney, consisting of the glomerulus and the attached tubule.
• Nephrotic ToxicityProperty of a chemical which harms kidney function
• Nerve Agent1. Highly poisonous chemical that works by preventing the nervous system from working properly.
• Nerve Agent Antidote KitNerve agent antidote kits counter the harmful effects of nerve agents, and have the potential to save lives...
• Nerve Cell SurvivalProcesses that promote, sustain, and preserve nerve cell viability. (NCI)
• Nerve Net1. A meshlike structure composed of interconnecting nerve cells that are separated at the synaptic junction...
• Nerve TissueThe tissue that generates and conducts electrical signals in the body. It contains the neurons.
• Nervous System1. The entire nerve apparatus, composed of a central part, the brain and spinal cord, and a peripheral part...
• Nervous System Disorders1. A non-neoplastic or neoplastic disorder that affects the brain, spinal cord, or peripheral nerves.
• Nest Parasitism1. Expression used by some authors (e.g., Thomson 1964:594, Monroe 1991:225) for brood parasitism.
• Nested DataA nested study is a research design in which the response to be measured (such as developmental effects in...
• NestingWhen a bird makes, repairs or lives in a nest in preparation for giving birth to young.
• Nestmate RecognitionA discrimination behavior exhibited by social insects belonging to different colonies, mediated by odors...
• Net BenefitCalculated by subtracting total costs from total benefits.
• Net Benefits1. The numerical difference between total benefits and total costs, both of which must be expressed in the...
• Net Bond ProceedsFunds raised from the sale of the bonds minus issuance costs (e.g., the underwriting discount, underwriter’s...
• Net Energy Output1. Gross energy output minus the parasitic load associated with power production. [40 CFR 60.41a (CFR 2013)]
• Net future valueSimilar to NPV, however, instead of discounting all future values back to the present, values are accumulated...
• Net Heating Value1. Difference between the heat value of the recovered chemical stream and the minimum heat value required to...
• Net Income NeutralityIn the case of energy conservation measures undertaken by an investor-owned utility whose rates are regulated...
• Net Metering1. A method of crediting customers for electricity that they generate on site in excess of their own...
• Net Metering/Net Billing1. For electric customers who generate their own electricity, net metering allows for the flow of electricity...
• Net Pen SystemStationary, suspended or floating system of nets, screens, or cages in open waters of the United States. Net...
• Net Present Value1. The present value of benefits less the present value of costs.
• Net Primary Production1. The part of the gross primary production that remains stored in the producer organism (primarily green...
• Net RadiationThe difference between upwelling and downwelling, covering longwave and shortwave radiation.
• Net Summer CapacityMaximum output, commonly expressed in megawatts (MW), that generating equipment can supply to system load, as...
• Net-Electric Sales1. (1) The gross electric sales to the utility power distribution system minus purchased power; or (2) For...
• NettingA concept in which all emissions sources in the same area that owned or controlled by a single company are...
• NetworkAny connection of two or more computers that enables them to communicate. Networks may include transmission...
• Network Authorization and Authentication ServicesA set of centralized information security services that Exchange Network partners can use to authenticate and...
• Network CausationNetwork models represent causation graphically: nodes represent entities or states connected by arrows that...
• Networked PolymerPolymers that connect in three-dimensional structures.
• Networks & Telecommunication Infrastructure Operations & MaintenanceAll activities to operate and maintain networks and telecommunications infrastructure, including planning...
• Net-Zero Building ConstructionCreation of buildings that balance energy needs with energy produced from renewable, zero-emission sources.
• NeuralPertaining to a nerve or to the nerves
• Neural NetFor purposes of this rule means an automated boiler optimization system. A neural network typically has the...
• Neural Network1. For purposes of this rule means an automated boiler optimization system. A neural network typically has...
• Neural PathwayNeural tracts connecting one part of the nervous system with another.
• NeuroblastomaCancer that arises in immature nerve cells and affects mostly infants and children.
• NeuroblastomasCancer that arises in immature nerve cells and affects mostly infants and children.
• Neurodevelopmental ProblemIncluding learning disabilities, general intellectual disabilities, and autism spectrum disorder.
• Neuroendocrine SystemA system of neurons that has the specialized function to produce and secrete hormones, and that constitutes...
• Neuron1. The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their...
• Neuronal Migration DisorderA diverse group of congenital brain developmental disorders characterized by defects in neuronal migration in...
• Neuronal Nitric Oxide SynthaseNitric oxide synthase, brain (1434 aa, ~161 kDa) is encoded by the human NOS1 gene. This protein plays a role...
• Neuropathy1. Functional disturbances and/or pathological changes in the peripheral nervous system
• NeuroscienceThe scientific disciplines concerned with the embryology, anatomy, physiology, biochemistry, pharmacology...
• Neurosecretory System1. A system of neurosecretory neurons that release hormones to the circulatory system.
• Neurospora1. A genus of Ascomycete fungi containing the red bread mold.
• Neurotoxic EffectAdverse change in the structure or function of the nervous system following exposure to a chemical substance.
• Neurotoxicity1. Exerting a destructive or poisonous effect on nerve tissue.
• neurotoxin1. A substance that is known or suspected to be poisonous to nerve tissue.
• Neurotransmitter Agent1. A chemical substance ("messenger") produced in and released by one neuron that carries a nervous impulse...
• Neurotransmitter ReceptorCell surface receptors that bind signaling molecules released by neurons and convert these signals into...
• NeurotropismProcesses by which certain microorganisms and toxins are attracted to nervous tissue.
• Neuse-PamlicoThe coastal drainage and associated waters from Oregon Inlet to Browns Inlet. North Carolina. Area = 13100...
• Neustonic LayerLayer of biota that lives at the surface of the water. These organisms are either positively buoyant...
• neutralA substance that is neither an acid nor a base and has a pH of 7. Neutral substances can be created by...
• Neutral Amino AcidsAmino acids with uncharged R groups or side chains.
• Neutral Coasting TechnologyVehicle technology that automatically puts the transmission in neutral when the vehicle has minimal power...
• Neutral MarkerA genetic marker derived from a locus that has a negligible effect on the ability of the organism to survive...
• Neutral Sulfite Semichemical Pulping OperationAny operation in which pulp is produced from wood by cooking (digesting) wood chips in a solution of sodium...
• Neutralization1. The chemical process in which the acidic or basic characteristics of a fluid are changed to those of water...
• Neutralization ReactionA reaction between an acid and a base that yields a salt and water.
• neutralize1. To combine acid or bases to make a neutral substance or solution. For example, acidic water can be...
• Neutron1. A subatomic particle with no electrical charge, found within every atom's nucleus except hydrogen, with...
• Neutron logNeutrons from an isotopic source are measured at one or several detectors after they migrate through material...
• Neutron LoggingMethod of well logging in which neutrons from a neutron source are scattered by rocks in the borehole...
• Neutrophil1. Granular leukocytes having a nucleus with three to five lobes connected by slender threads of chromatin...
• Never-Controlled Work StationWork station which is not equipped with provisions by which any emissions, including those in the exhaust...
• New Active Ingredient1. An active ingredient that is not currently contained as an active ingredient in any EPA registered...
• New Active Ingredient UseWhen used with respect to a product containing a particular active ingredient, means:(1) Any proposed use...
• New Affected Source1. Any affected source the construction or reconstruction of which is commenced after September 13, 2000.
• New Affected UnitAffected unit for which construction commenced on or after August 4, 2023.
• New Air Pollution SourceAir pollution source that begins actual construction after the effective date of the ‘‘General Rules for...
• New AircraftRelating to an aircraft or aircraft engine that has never been placed into service.[40 CFR 87.1 (CFR 2018)]
• New Aircraft EngineRelating to an aircraft or aircraft engine that has never been placed into service.[40 CFR 87.1 (CFR 2018)]
• New Animal Drug ApplicationDefined in 512(b)(1) of the Federal Food, Drug, and Cosmetic Act (21 U.S.C 360b(b)(1)).
• New Asbestos UseCommercial uses of asbestos not identified in § 763.165 the manufacture, importation or processing of which...
• New Biochemical and Microbial Registration ReviewReview of an application for registration of a biochemical or microbial pesticide product containing a...
• New CCR Surface ImpoundmentCCR surface impoundment or lateral expansion of an existing or new CCR surface impoundment that first...
• New ChemicalActive ingredient not contained in any currently registered pesticide.
• New Chemical Registration ReviewReview of an application for registration of a pesticide product containing a chemical active ingredient...
• New Chemical Substance1. Any chemical substance which is not included in the inventory compiled and published under section 8(b) of...
• New Class I Engine FamilyAny group of engines that employ a design that is different from engine families that the engine manufacturer...
• New Coal Combustion Residuals LandfillCCR landfill or lateral expansion of a CCR landfill that first receives CCR or commences construction after...
• New Copper Converter SystemCopper matte is oxidized and forms copper blister by a process that is performed continuously. This system...
• New Covered Fleet VehicleVehicle that has not been previously controlled by the current purchaser, regardless of the model year...
• New Dental SourceDental discharger whose first discharge to a POTW occurs after July 14, 2017.
• New DevelopmentDevelopment that occurs on land where generally no or minimal structures or other impervious surfaces, such...
• New Discharger1. Any building, structure, facility, or installation: a. From which there is or may be a discharge of...
• New Electric Generating UnitUnit that commences commercial operation on or after November 15, 1990, including any such unit that serves a...
• New electronic document receiving systemA system developed by an authorized program that, on October 13, 2005, did not have an "existing" electronic...
• New EngineGenerally refers to an engine if its equitable or legal title has never been transferred to an ultimate...
• New England RegionThe drainage within the United States that ultimately discharges into: (a) the Bay of Fundy; (b) the Atlantic...
• New Equipment1. When relating to a locomotive or locomotive engine, meaning given in paragraph (1) of this definition...
• New Facility1. Any building, structure, facility, or installation that meets the definition of a “new source” or “new...
• New Great Lakes DischargerAny building, structure, facility, or installation from which there is or may be a “discharge of pollutants”...
• New Hazardous Waste Management Facility1. Facility which began operation, or for which construction commenced after November 19, 1980. (See also...
• New Hazardous Waste Tank ComponentTank system or component that will be used for the storage or treatment of hazardous waste --and for which...
• New Hazardous Waste Tank SystemTank system or component that will be used for the storage or treatment of hazardous waste --and for which...
• New Independent Power Production FacilityUnit that:(1) Commences commercial operation on or after November 15, 1990;(2) Is nonrecourse...
• New Injection WellInjection well which began injection after a UIC program for the state applicable to the well is approved or...
• New Locomotive1. Locomotive or locomotive engine the equitable or legal title to which has never been transferred to an...
• New Locomotive Engine1. Locomotive or locomotive engine the equitable or legal title to which has never been transferred to an...
• New Marine Engine1. Marine engine, the equitable or legal title to which has never been transferred to an ultimate purchaser.
• New MicroorganismMicroorganism not included on the Inventory.
• New Motor VehicleMotor vehicle meeting the criteria of either paragraph (1) or (2) of this definition. New motor vehicles may...
• New Motor Vehicle EngineMotor vehicle engine meeting the criteria of either paragraph (1) or (2) of this definition.(1) A motor...
• New Municipal Solid Waste Landfill UnitAny municipal solid waste landfill unit that has not received waste prior to October 9, 1993, or prior to...
• New Non Road Engine1. When relating to a locomotive or locomotive engine, meaning given in paragraph (1) of this definition...
• New Nonroad Engine1. Definitions too long to reproduce here. [For full definitions see the following: 40 CFR 1039.801 (CFR...
• New Nonroad Equipment1. A nonroad piece of equipment for which the ultimate purchaser has never received the equitable or legal...
• New Nonroad Equipment Model YearEquipment defined as “new nonroad equipment” under paragraph (1) of the definition of “new nonroad equipment”...
• New Nonroad MachineryNonroad engine, nonroad vehicle, or nonroad equipment the equitable or legal title to which has never been...
• New Offshore Oil and Gas Extraction FacilityAny building, structure, facility, or installation that: meets the definition of a “new facility” at 40 CFR...
• New Outer Continental Shelf SourceHas the meaning given in the applicable requirements of §§ 55.13 and 55.14 of this part, except that for two...
• New Pesticide ChemicalActive ingredient not contained in any currently registered pesticide.
• New Pesticide Product1. Pesticide product which is not a federally registered product.
• New Pesticide UseNew use, when used with respect to a product containing a particular active ingredient, means: (1) Any...
• New Portable Marine Fuel LinePortable marine fuel tanks and fuel lines that have not yet been placed into service, or which are otherwise...
• New Portable Marine Fuel TankPortable marine fuel tanks and fuel lines that have not yet been placed into service, or which are otherwise...
• New Process Unit1. Process unit for which the construction or reconstruction commenced after March 29, 1995.
• New Product1. A product that is not registered and can be either a Manufacturing Use Product (MP or MUP) or an End Use...
• New Product Manufacturer1. As stated in the Act “means any person engaged in the manufacturing or assembling of new products, or the...

1,191 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.