Environment terminology · MLC-0121

Environment terms: L (1,023)

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• Life Cycle Sustainability AnalysisIt refers to the evaluation of all environmental, economic and social impacts towards more sustainable...
• Life Cycle Thinking1. LCT is a concept that integrates existing consumption and production strategies, preventing a piece-meal...
• Life expectancyThe length of an individual's life.
• Life History1. Developmental processes and behaviors that sustain and reproduce a species. For example, case formation...
• Life History StageA portion of an organism's life with specific living requirements.
• Life ScienceAll of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and...
• Life Span1. The expected useful life of a supply-side or demand-side project, measure, or practice. (The life span may...
• Life Stage BehaviorBehavior appropriate for or common to a chronological age.
• Life StyleA characteristically different way of living which may be an individual variant within the cultural main...
• Life Style BehaviorBehavior that individuals choose to participate in, such as smoking, frequent exercise, or healthy eating...
• Lifecycle / Change ManagementLifecycle/Change Management involves the processes that facilitate a smooth evolution, composition, and...
• Life-cycle characterizationElement of the life-cycle impact assessment phase in which the potential impacts associated with the...
• Lifecycle ImpactEnvironmental impacts, including energy consumption, over the course of the product's lifespan from raw...
• Lifecycle impactsEnvironmental impacts, including energy consumption, over the course of the product's lifespan from raw...
• Lifestage1. A distinguishable time frame in an individual's life characterized by unique and relatively stable...
• LifetimeCovering the life span of an organism (generally considered 70 years for humans).
• Lifetime (atmospheric)The lifetime of a greenhouse gas refers to the approximate amount of time it would take for the anthropogenic...
• Lifetime Average Daily Dose1. Figure for estimating excess lifetime cancer risk.
• Lifetime Cancer Risk1. Probability of contracting cancer over the course of a lifetime (assumed to be 70 years for the purposes...
• Lifetime ExposureTotal amount of exposure to a substance that a human would receive in a lifetime (usually assumed to be 70...
• LiftIn a sanitary landfill, a compacted layer of solid waste and the top layer of cover material.
• LigamentShiny, flexible bands of fibrous tissue connecting together articular extremities of bones. They are pliant...
• Ligand1. A molecule that binds to another molecule, used especially to refer to a small molecule that binds...
• Ligand BindingLigand Binding is the tight and specific (high affinity) interaction between a small molecule (typically) and...
• Ligand Gated Ion ChannelA subclass of ion channels that open or close in response to the binding of specific LIGANDS.
• Ligand-Independent Chloride Ion Channel ActivationA process that involves the detection of and alteration of either the voltage or pH across a membrane, and...
• Ligand-Independent Ion Channel ActivationA process that involves interactions between an intrinsic membrane molecule and an electrochemical gradient...
• Ligases1. A class of enzymes that catalyze the formation of a bond between two substrate molecules, coupled with the...
• Light AbsorptionAbsorption of sunlight by chlorophyll molecules in photosynthesis
• Light attenuationReduction in the amount of light that can penetrate through the water, usually caused by excess suspended...
• Light attenuation coefficientA numerical value that describes the light penetration in water or water clarity.
• Light CrudeLiquid petroleum that has a low density and flows freely at room temperature. It has a low viscosity, low...
• Light Detection And RangingLight Detection And Ranging is a remote sensing instrument that uses laser light pulses to measure the...
• Light Detecton and RangingRemote sensing instrument that uses laser light pulses to measure the elevation of the land surface with a...
• Light Directory Access ProtocolA client-server protocol for accessing a directory service. It was initially used as a front-end to X.500...
• Light emitting diodesSmall light sources that become illuminated by the movement of electrons through a semiconductor material...
• Light Harvesting ComplexA protein complex that harvests light energy and converts it to exciton energy that can migrate to a reaction...
• Light Heavy-Duty VehicleThose vehicles with GVWR below 19,500 pounds.Vehicles In this class include heavy-duty pickup trucks and...
• Light Light-Duty Truck1. Any light-duty truck rated through 6000 lbs. GVWR.
• Light MicroscopyTechnique to observe small objects by using an instrument (microscope) that illuminates the object to be...
• Light Non-Aqueous Phase Liquid1. A liquid consisting of a solution of organic compounds (e.g., petroleum hydrocarbons) which is less dense...
• Light Nonaqueous Phase LiquidAn LNAPL is one of a group of organic substances that are relatively insoluble in water and are less dense...
• Light Rail1. A streetcar-type vehicle operated on city streets, semiexclusive rights-of-way, or exclusive...
• Light SaturationThe optimal light level for algae and macrophyte growth and photosynthesis.
• Light Truck1. Trucks of 10,000 pounds gross vehicle weight rating or less, including pickups, vans, truck-based station...
• Light water reactorA common nuclear reactor cooled and usually moderated by ordinary water. It is s generic designation...
• Light-Commercial Marine EngineCategory 1 propulsion marine engine at or above 600 kW with power density above 45.0 kW/liter that is...
• Light-Duty Program VehicleMedium-duty passenger vehicle and any vehicle subject to standards under this subpart that is not a...
• Light-duty Truck1. Any motor vehicle rated at 8,500 pounds GVWR or less which has a vehicle curb weight of 6,000 pounds or...
• Light-Duty Truck 1Any light light-duty truck up through 3750 lbs loaded vehicle weight. [40 CFR 86.094-2 (CFR 2018)]
• Light-Duty Truck 2Any light light-duty truck greater than 3750 lbs loaded vehicle weight. [40 CFR 86.094-2 (CFR 2018)]
• Light-Duty Truck 3Any heavy light-duty truck up through 5750 lbs adjusted loaded vehicle weight.[40 CFR 86.094-2 (CFR 2018)]
• Light-Duty Truck 4Any heavy light-duty truck greater than 5750 lbs adjusted loaded vehicle weight.[40 CFR 86.094-2 (CFR 2018)]
• Light-duty Vehicle1. A passenger car or passenger car derivative capable of seating 12 passengers or less. (40 CFR 86.1803-01).
• Light-duty vehiclesAutomobiles and light trucks combined.
• Light-Emitting Diode1. A long-lasting illumination technology used for exit signs which requires very little power.
• Light-non-aqueous phase liquidsOrganic fluids that are less dense than water. They are capable of forming an immiscible layer that floats on...
• Lightweight Aggregate KilnType of industrial furnace that produces lightweight aggregate and burns liquid hazardous waste as fuel to...
• LignificationCell wall lignification makes the systems containing vascular cells stronger
• Lignins1. A hard-to-degrade compound that is part of the structure of older or woody plants. The carbon rings in...
• Lignite1. A brownish-black coal of low rank with high inherent moisture and volatile matter content, used almost...
• Lignite CoalCoal that is classified as lignite A or B according to ASTM Method D388-05, “Standard Classification of Coals...
• LiguleIn grasses, an appendage at the juncture of leaf sheath and blade, generally with a membranous or fringed...
• Likelihood Function1. Relative probabilities that various values of population parameters would arise from the sample...
• Likelihood RatioRatio of the probability that the observed data arise from a set of model parameters relative to the maximum...
• Likely Carcinogenic to HumansThis descriptor is appropriate when the weight of evidence is enough to show the potential to cause cancer in...
• Likely to be Carcinogenic to HumansThis descriptor is appropriate when the weight of evidence is enough to show the potential to cause cancer in...
• Lima Bean ProcessingProcessing of lima beans into the following product styles: Canned and frozen, green and white, all varieties...
• Lime1. Calcium oxide or other alkaline reagent.
• Lime Kiln1. Combustion unit (e.g., rotary lime kiln or fluidized-bed calciner) used at a kraft or soda pulp mill to...
• Lime Manufacturing PlantAny plant which uses a rotary lime kiln to produce lime product from limestone by calcination.
• Lime ProductProduct of the calcination process including, but not limited to, calcitic lime, dolomitic lime, and...
• Lime Production RateRate at which dry lime, measured as CaO, is produced in the lime kiln.
• Lime-InjectionContinuous addition of lime upstream of a fabric filter.
• Limestone1. A sedimentary rock formed by chemical precipitation from sea water or fresh water that is composed...
• Limestone ScrubbingUse of a limestone and water solution to remove gaseous stack-pipe sulfur before it reaches the atmosphere.
• Limit FeedingFeeding strategy in which pigs are fed a specific amount of food in a specific time period Vs free access to...
• Limit of Detection1. The minimum concentration of a substance being analyzed test that has a 99 percent probability of being...
• Limit of Detection = Detection Limit = Method Detection LimitThe minimum concentration of an analyte that can be identified, measured, and reported with 99% confidence...
• Limit of Detection/Limit of QuantificationThe LOD and LOQ concentrations are calculated by applying the compound's calibration curve to the noise...
• Limit of Quantification1. LOQ is the point at which "measurements become quantitatively meaningful".
• Limit of Quantitation1. The level of quantitation, usually 10 times the signal of the blank. {OW/TSC}
• Limit Set DesignatorA single-character code in ICIS-NPDES that groups limits that are set on a similar basis (e.g., monthly vs...
• Limitation basisThe limitation basis is included as a tool to sort the numerical limitations in the ELG Database. Limitations...
• Limitation flagIn some cases, the entry will indicate that the limitation has a qualifier (e.g., pollutant discharge must be...
• Limited Access SpaceInternal surfaces or passages of an aerospace vehicle or component that cannot be reached without the aid of...
• limited degradation1. A policy that allows for some lowering of natural environmental quality to a given level beneath an...
• Limited Evidence1. A term used in evaluating study data for the classification of a carcinogen by the 1986 U.S. EPA...
• Limited Maintenance PlanMaintenance plan that EPA has determined meets EPA's limited maintenance plan policy criteria for a given...
• Limited-Use Boiler1. Any boiler that burns any amount of solid or liquid fuels and has a federally enforceable average annual...
• Limited-Use GroundwaterGroundwater that is not a current or potential source of drinking water because (1) the concentration of...
• Limited-Use Liquid Oil-Fired Subcategory1. Oil-fired electric utility steam generating unit with an annual capacity factor of less than 8 percent of...
• Limited-Use Process HeaterAny boiler or process heater that burns any amount of solid, liquid, or gaseous fuels and has a federally...
• Limiting Critical ConditionRegulatory, technical, and economic circumstances listed in Column C of Appendix L to this subpart that...
• Limiting FactorA condition whose absence or excessive concentration, is incompatible with the needs or tolerance of a...
• Limiting Permissible Concentration1. That concentration of a constituent which, after allowance for initial mixing as provided in § 227.29...
• Limiting ResourceA resource that is in short supply compared with the demand for it (Ehrlich and Roughgarden 1987:625).
• Limiting Tracer MethodMethod for evaluating soil ingestion that assumes that the maximum amount of soil ingested corresponds with...
• Limnocalanus macrurusType of copepod.
• Limnology1. The study of the physical, chemical, meteorological and biological aspects of fresh waters.
• Linaria vulgarisCrowds out native species. [National Invasive Species Information Center: USDA Agricultural Library at...
• Lindane1. A pesticide that causes adverse health effects in domestic water supplies and is toxic to freshwater fish...
• Line LossesThe amount of energy lost during transmission and distribution of electricity, including unaccounted for uses.
• Line PipeSteel pipe is used in most pipelines transporting hydrocarbons.
• Line PurgeCoating material expelled from the spray system when clearing it.
• Line Source EmissionEmission from an array of pollutant sources along a defined path that can be treated in dispersion models as...
• Linear Calibration Range1. The concentration range over which the instrument response is linear. {OW/TSC}
• Linear Coral ReefThese are linear coral formations that are oriented parallel to shore or the shelf edge. They follow the...
• linear correlation coefficientA measure of the tendency for there to be a linear relationship between (X, Y) pairs of data. Measured by...
• Linear Discriminant AnalysisType of discriminant analysis employing a linear combination of variables.
• Linear Dose ResponseA pattern of frequency or severity of biological response that varies directly with the amount of dose of an...
• Linear Dose-Response ModelThe amount of change in a response is proportional to the amount of change in some function of dose.
• Linear Dynamic Range1. The concentration range over which the instrument response is linear. {ORD} {OW/EAD} {OPP} {OAR/OAQPS}...
• Linear Low Density PolyethyleneA plastic that is used predominantly in film applications due to its toughness, flexibility, and relative...
• linear modelHaving the form, f(x)=β₀+β₁x₁+β₂x₂+β₃x₃... in which from any number of independent or explanatory variables...
• Linear ModelsLinear models have the form, f(x)=β₀+β₁x₁+β₂x₂+β₃x₃... in which from any number of independent or explanatory...
• Linear Mollusk ReefNarrow straight or sinuous, ridge-like reefs formed primarily by oysters but also by other mollusks. These...
• Linear No Threshold ModelThis principle assumes that the risk of cancer increases linearly as radiation dose increases. This means...
• Linear PolymerAlso called a straight chain polymer where the carbon-carbon backbone is a chain.
• linear rangeThe concentration range over which the analytical curve remains linear.
• Linearity1. (LYNN-ee-AIR-it-ee) How closely an instrument measures actual values of a variable through its effective...
• Linearized Multi-Stage ModelConservative mathematical model for cancer risk assessment. This model fits linear dose-response curves to...
• Linearized Multistage Model1. Derivation of the multistage model, where the data are assumed to be linear at low doses.
• Linearized Multistage Procedure1. A modification of the multistage model, used for estimating carcinogenic risk, that incorporates a linear...
• Line-Commutated InverterAn inverter that is tied to a power grid or line. The commutation of power (conversion from direct current to...
• Line-Haul LocomotiveLocomotive that does not meet the definition of switch locomotive. Note that this includes both freight and...
• Liner1. Structure of natural clay or manufactured material (plastic) which serves as a barrier to restrict...
• Liner Slips or SquawksSlippage of the liner and teat cup during milking. Caused by a sharp change of milking vacuum within the unit...
• linersTubes lining DP soil sampling tools. Used to collect soil cores for chemical and/or lithologic analysis...
• Lines of Evidence1. Information derived from different sources or by different techniques that can be used to describe and...
• LiningWith reference to a canal, tunnel, shaft, or reservoir, a coating of asphaltic concrete, reinforced or...
• Link CheckerA link checker is a program that tests and reports on the validity of the hypertext links on the pages in a...
• Link ResolverLink resolvers are products used by libraries to automatically direct users to a URL where they can access...
• Linkage AnalysisAnalytical procedure which attempts to find linkages between genes. More generally, an analytical method...
• Linked GeneGenes that are so closely associated on a chromosome that the allelic forms found on a chromosome are...
• Linked Modeling SystemModels integrated so that each model cannot separately define its internal variables
• LipaseAn enzyme of the hydrolase class that catalyzes the reaction of triacylglycerol and water to yield...
• LipidOne of a variety of organic substances that are insoluble in polar solvents, such as water, but that dissolve...
• Lipid AlcoholsNaturally-occurring fatty alcohols such as cetyl alcohol present in waxes
• Lipid BindingLipid Binding is the molecular interaction between a lipid molecule and a macromolecule (usually protein) for...
• Lipid Metabolic ProcessAnabolic and catabolic biochemical changes to lipids within a cell as materials needed for important life...
• Lipid PeroxidationThe degradation of lipids caused by an oxidative attack from free radicals.
• Lipid Solubility1. The maximum concentration of a chemical that will dissolve in fatty substances. Lipid soluble substances...
• Lipids1. A generic term for fats and lipoids, the alcohol-ether-soluble constituents of protoplasm, which are...
• Lipophilic EffectAbility of a chemical to dissolve in fats, oils, and lipids.
• Lipophilic HormonesHydrophobic hormones, such as thyroid hormones, that are able to cross cell membranes and bind to...
• LipophilicityAbility of a chemical to dissolve in fats, oils, and lipids.
• Liquefaction1. Changing a solid into a liquid.
• Liquefied natural gas1. Natural gas converted to liquid form by cooling to a very low temperature.
• Liquefied Natural Gas Boil-Off GasNatural gas in the gaseous phase that vents from LNG storage tanks due to ambient heat leakage through the...
• Liquefied Natural Gas Process UnitUnit used to cool natural gas to the point at which it is condensed into a liquid which is colorless...
• Liquefied petroleum gas1. Ethane, ethylene, propane, propylene, normal butane, butylene, and isobutane produced at refineries or...
• Liquid1. Substance or mixture of substances that flows readily, but, unlike a gas, does not expand indefinitely...
• Liquid AmmoniaLiquid ammonia commercially shipped for which the Department of Transportation requires 0.2 percent minimum...
• Liquid ChromatographyA type of chromatography in which separation of a mixture is achieved by passing a sample in a stream of...
• Liquid Chromatography-Mass SpectrometryLC-MS is a hyphenated technique, combining the separation power of liquid chromatography (LC), an analytical...
• Liquid Collection SystemTankage and/or lines at a well site to contain liquids from one or more wells or to convey liquids to another...
• Liquid EggContents of egg (white, yolk, or both) that have been removed and shipped as a product in bulk.
• Liquid Electrolyte BatteryA battery containing a liquid solution of acid and water. Distilled water may be added to these batteries to...
• Liquid ExtractionSeparation of chemicals based on different solubilities in two solutes. Allows recovery of the chemical from...
• Liquid Fuel1. Any fuel in liquid form at standard temperature and pressure, including but not limited to diesel...
• Liquid Injection IncineratorCommonly used system that relies on high pressure to prepare liquid wastes for incineration by breaking them...
• liquid limitThe lower limit for viscous flow of a soil.
• Liquid ManureManure having a total solids content of no more than five percent.
• Liquid Oil-Fired Electric Generating Unit Capacity FactorTotal annual heat input from oil divided by the product of maximum hourly heat input for the EGU, regardless...
• Liquid Phase ProcessPolymerization process in which the polymerization reaction is carried out in the liquid phase; i.e., the...
• Liquid Phase Slurry ProcessLiquid phase polymerization process in which the monomer(s) are in solution (completely dissolved) in a...
• Liquid Phase Solution ProcessLiquid phase polymerization process in which both the monomer(s) and polymer are in solution (completely...
• Liquid Plastic CoatingCoating made from fine particle-size polyvinyl chloride (PVC) in solution (also referred to as a plastisol)...
• Liquid Polychlorinated BiphenylsHomogenous flowable material containing PCBs and no more than 0.5 percent by weight non-dissolved material.
• Liquid WasteGeneral term describing wastes that exist in a water solution.
• Liquid Waste ManagementDisposal, processing, controlling, recycling, and reusing the liquid wastes of plants, animals, humans, and...
• liquidity indexQuantitative value used to assess whether a soil will behave as a brittle solid, semisolid, plastic, or...
• Liquid-Mounted Seal1. Foam or liquid-filled primary seal mounted in contact with the liquid between the tank wall and the...
• Liquids Dripping1. Visible leakage from the seal including spraying, misting, clouding, and ice formation. [40 CFR 60.481...
• Liquids UnloadingUnloading of liquids that have accumulated over time in gas wells, which are impeding or halting production...
• Liquid/Slurry ManureManure management component in which manure is stored as excreted or with some minimal addition of water to...
• LisinoprilOne of the angiotensin-converting enzyme inhibitors (ACE inhibitors), orally active, that has been used in...
• ListShorthand term for EPA list of violating facilities or firms debarred from obtaining government contracts...
• Listed Hazardous SubstanceThe elements and compounds and hazardous wastes appearing in table 302.4 are designated as hazardous...
• Listed OilseedFollowing agricultural products: corn germ, cottonseed, flax, peanut, rapeseed (for example, canola)...
• Listed on the NPLA site that has been proposed to the National Priorities List is "final" when it has been formally added to...
• Listed ParticipantAn individual or organization who has met all the requirements for listing in the RMP and RCP programs.
• Listed Sensitive EnvironmentAreas that are evaluated as one or more of the sensitive environments listed in HRS Table 4 - 23, even if...
• Listed Waste1. Wastes that are considered hazardous under RCRA because they meet specific listing descriptions.
• Listed WastesWastes that are considered hazardous under RCRA because they meet specific listing descriptions.
• Listeria monocytogenesGram-positive bacterium, motile by means of flagella. Some studies suggest that 1-10% of humans may be...
• ListeriosisThe manifestations of listeriosis include septicemia, meningitis (or meningoencephalitis), encephalitis, and...
• ListservA listserv is a mailing list that is supported by a listserver program. Depending on the product, users can...
• ListserverA listserver (mailing list server) is a program that handles subscription requests for a mailing list and...
• LithiasisThe formation of stones (calculi) in the body.
• LithificationThe conversion of loose sediment into solid sedimentary rock. Several processes, including compaction of...
• Lithified Earth MaterialAll rock, including all naturally occurring and naturally formed aggregates or masses of minerals or small...
• Lithium CarbonateA lithium salt, classified as a mood-stabilizing agent. Lithium ion alters the metabolism of BIOGENIC...
• Lithium CompoundsInorganic compounds that contain lithium as an integral part of the molecule.
• Lithium Ion BatteryRechargeable battery where lithium ions move between the electrodes
• Lithium Sulfur BatteryA battery that uses lithium in the negative electrode and a metal sulfide in the positive electrode, and the...
• Lithographic PressPress which uses oil-based inks to print from a stone or a metal plate.
• Lithologic UnitLithostratigraphic unit; a body of rock that is consistently dominated by a certain lithology or similar...
• Lithology1. The description of rocks, based on color, mineral composition and grain size.
• Lithosphere1. The lithosphere is the outer solid part of the earth, including the crust and uppermost mantle. The...
• lithosphericOf or pertaining to the solid portion of the Earth, including the crust and part of the upper mantle; the...
• Litigation1. The process of a lawsuit.
• Litigation (Generic)Engaged in legal proceedings.
• litmus paper1. Paper coated with a chemical coloring obtained from lichens that turns red in acidic water and blue in...
• Litter1. The highly visible portion of solid waste (usually packaging material) which is generated by the consumer...
• Litter Size (required nested dataset input variable)Number of live pups per litter.
• Litter Specific CovariateThis is a covariate such as body weight of dams, number of implants or litter size that is felt to best...
• Little ColoradoThe Little Colorado River Basin. Arizona, New Mexico. Area = 26900 sq.mi.
• Little Ice AgeCold period that lasted from about A.D. 1550 to about A.D. 1850 in Europe. North America. and Asia. This...
• Littoral1. Of, relating to, or existing on a shore.
• littoral cell1. A section of coast for which sediment transport processes can be isolated from the adjacent coast; within...
• Littoral CurrentA current running parallel to the beach and generally caused by waves striking the shore at an angle.
• littoral transportThe movement of sediment littoral drift in the littoral zone by waves and currents; includes movement both...
• Littoral Zone1. (LIT-or-al) That portion of a body of fresh water extending from the shoreline lakeward to the limit of...
• Live VaccineVaccine in which live virus is weakened (attenuated) through chemical or physical processes in order to...
• Live Weight KilledTotal weight of animals slaughtered.
• Liver1. A triangular-shaped organ located under the diaphragm in the right hypochondrium. It is the largest...
• Liver DisfunctionsPathological processes of the liver.
• Liver Function MeasurementBlood tests that measure the levels of liver enzymes (proteins made and used by the liver) to determine if...
• Liver MicrosomeClosed vesicles of fragmented endoplasmic reticulum created when liver cells or tissue are disrupted by...
• Livestock1. Cattle, sheep, swine, goat, horse, mule, or other equine.
• Livestock DiseasesIlnesses affecting the health and well being of animals raised in captivity for food or domestic uses, such...
• Livestock Exclusion FencingFencing that keeps livestock away from rivers and streams.
• Livestock Excreted NitrogenNitrogen that is excreted by livestock in manure and urine.
• Livestock Production AreaFacilities and structures for raising livestock. May or may not be part of confined feeding operations.
• Livestock Water UseWater used for livestock watering, feed lots, dairy operations, fish farming, and other on-farm needs.
• Living PlantPlant, plant organ, or plant part that is alive, viable, or dormant. Examples of plant parts include, but are...
• living shoreline1. A shore protection concept where some or all of the environmental characteristics of a natural shoreline...
• Lixiviant1. A solution of water or steam, possibly mixed with other chemicals, that is injected through an injection...
• Load1. The amount of a type of pollution that the Bay and its tributaries receive.
• Load Allocation1. The portion of a receiving water's loading capacity that is attributed either to one of its existing or...
• Load CellDevice external to the locomotive, of high electrical resistance, used in locomotive testing to simulate...
• Load FollowingAbility of a hydropower plant to adjust its power output as electricity demand changes throughout the day.
• Load Fraction1. Actual heat input of a boiler divided by heat input during the performance test that established the...
• Load ManagementMethods for managing levels and patterns of usage in order to optimize system resources and facilities.
• Load or loadingThe total amount of pollutants entering a waterbody from one or multiple sources, measured as a rate, as in...
• Load Serving EntitySecures energy and transmission service (and related Interconnected Operations Services) to serve the...
• Loaded Vehicle MassCurb mass plus 80 kg (176 lb.), average driver mass.
• Loaded Vehicle Weight1. Curb weight plus 300 lbs. [40 CFR 88.102-94 (CFR 2013)].
• LoaderMechanical shovel or other machine for loading coal, ore, mineral, or rock.
• Loading1. The rate of release of a constituent of interest to a particular receiving medium.
• Loading Capacity1. The greatest amount of loading that a water can receive without violating water quality standards.
• Loading, Load, Loading RateThe total amount of material (pollutants) entering the system from one or multiple sources; measured as a...
• Loading (pollutant loading)Amount of a substance entering the environment (e.g., soil, water, pollutants, air).
• Loading Rack1. Loading arms, pumps, meters, shutoff valves, relief valves, and other piping and valves necessary to fill...
• Loading RateA measure of the rate of volatile solids (VS) entry into a manure management facility with methane recovery...
• loadingsThe amount of pollutants being discharged or deposited into the lake.
• Loading/Unloading RackFixed structure (such as a platform, gangway) necessary for loading or unloading a tank truck or tank car...
• Loan Guarantee1. Agency’s guarantee or insurance of a loan made by a person.
• LobeA flattened branch, generally found on foliose lichens.
• LobuleA vegetative means of propagation for lichens; small lobe-like two-sided propagules that break off and...
• Local Agency1. Any local government agency other than the State agency, which is charged with responsibility for carrying...
• Local Air Quality Modeling AnalysisAssessment of localized impacts on a scale smaller than the entire nonattainment or maintenance area...
• Local Area Network1. A system for linking together computers, terminals, printers, and other equipment, usually within the same...
• Local circulationConvective and adjective air circulation and mixing within a room or within a zone.
• Local Community1. General term referring to all members of a local area with an interest in school environmental health and...
• Local Distribution Company Custody Transfer StationMetering station where the LDC receives a natural gas supply from an upstream supplier, which may be an...
• Local Economic EffectEffects of an action or inaction on dollar market transactions in the immediate area of the action or...
• Local Education Agency1. Any local educational agency as defined in section 198 of the Elementary and Secondary Education Act of...
• Local Emergency Planning Committee1. The body appointed by the State Emergency Response Commission (SERC), as required by EPCRA, which develops...
• Local Emergency Response PlanThe emergency plan prepared by the Local Emergency Planning Committee (LEPC) as required by section 303 of...
• Local ExhaustFans used to exhaust pollutants and moisture at or near their source. Bath fans, range hoods, and utility...
• LOCAL GOVERNMENTA county, municipality, city, town, township, local public authority (including any public and Indian housing...
• Local Limit1. A conditional discharge limit imposed by a municipality upon industrial or commercial facilities that...
• Local limits1. Specific discharge limits developed and enforced by POTWs upon industrial or commercial facilities (IUs)...
• Local MaximumMathematical solution that maximizes a function in a region that may not be the overall global maximum.
• Local PermitSpecial permit outlining specific requirements before an activity can be authorized.
• Local PermitsSpecial permits outlining specific requirements before an activity can be authorized.
• Local registration authorityAs defined in § 3.3 of CROMERR, an individual who is authorized by a state, tribe, or local government to...
• Local RegulationRegulation at the State or local level that requires a hospital to reduce the quantity of ethylene oxide...
• LocalePart of a control measure efficiency record that can limit the applicability of the record to a specific...
• Localized Irrigation InfrastructureInfrastructure to support water distribution under low pressure, through a piped network and applied to each...
• Locatable Mineral1. Mineral acquisition by the location and maintenance of mining claims. Mineral deposits subject to...
• locatable mineralsA legal term that identifies minerals acquired through the General Mining Law of 1872, as amended. Locatable...
• locationSee "claim." Also, the process of claiming or appropriating a parcel of mineral land.
• Location RatioFactor applied to pollutant reduction credits when sources are upstream of a waterbody of concern that...
• Location TextDescription of the location of the Assessment Unit.
• Location Type CodeDescription of the type of location (i.e. 8-digit HUC, County, etc.). Location types include the national...
• Location-specific remediationAppropriate response measures, as prescribed in a remedial action workplan, that are tailored to the...
• LockA chamber designed to lift vessels - from one water body to another - by adjusting the level of water in the...
• Locked FaultA locked fault is a fault that is not slipping because frictional resistance on the fault is greater than the...
• Locomotive1. Railroad vehicle equipped with flanged wheels for use on railroad tracks, powered directly by electricity...
• Locomotive Design CertificationTo certify a locomotive based on inherent design characteristics rather than your test data, such as allowed...
• Locomotive Engine1. Engine incorporated into a locomotive or intended for incorporation into a locomotive. [40 CFR 92.2 (CFR...
• Locomotive ImporterEntity or person who imports locomotives or locomotive engines from a foreign country into the United States...
• Locomotive InstallerIndividual or entity which assembles remanufactured locomotives or locomotive engines. [40 CFR 92.2 (CFR...
• Locomotive Load Cell Test StandLoad cell § 201.1(o) and associated structure, equipment, trackage and locomotive being tested.
• Locomotive Manufacturer/RemanufacturerManufacturer of a freshly manufactured locomotive or engine or the remanufacturer of a remanufactured...
• Locomotive or Marine Diesel FuelAny diesel fuel or other distillate fuel that is used, intended for use, or made available for use, as a fuel...
• Locomotive Owner or OperatorOwner and/or operator of a locomotive.
• Locomotive Production1. Manufacture or remanufacture. Where a certificate holder does not actually assemble the locomotives or...
• Locomotive Upgrade1. To modify a locomotive or locomotive engine that was originally manufactured prior to January 1, 1973 (or...
• Locus1. A site on a chromosome where a gene or other measurable variation resides. The DNA at this chromosomal...
• Lode1. An unusually large vein or set of veins containing ore minerals.
• lode claimA claim based on the presumption that the valuable mineral is a part of a bed-rock lode, vein, stockwork...
• Lodged by DOJAn enforcement instrument (e.g. Consent Decree) is lodged by the Department of Justice (DOJ) with the court.
• Loess1. Fine-grained material that has accumulated by wind deposition.
• Log File1. An access log file is a list of all the requests for individual files that people have requested from a...
• Log Normal DistributionThe single-tailed probability distribution of any random variable whose logarithm is normally distributed.
• log reduction"Log" stands for logarithm, which is the exponent of 10. For example, log2 represents 102 or 10 x 10 or 100...
• Log TransformationLogarithm of raw data.
• Log Weirconsists of a header log and a footer log placed in the bed of the stream channel, perpendicular or at an...
• Logarithm(LOG-a-rith-m) The exponent that indicates the power to which a number must be raised to produce a given...
• Logging debris (slash)The unwanted, unutilized, and generally unmerchantable accumulation of woody material, such as large limbs...
• Logic Model1. A diagram and text that describes and illustrates the logical (causal) relationships among program...
• Logic Modeling1. (Developing) a picture of the relationships, theories, and assumptions underlying the program. A program...
• LOGICAL RECORDIn electronic records, a collection of related data elements, referring to one person, place, thing, or...
• Logistic Model1. A dose-response model used for low-dose extrapolation.
• Logistics ManagementLogistics Management involves the planning and tracking of personnel and their resources in relation to their...
• logit modelDose-response model which, like the probit model, leads to an S-shaped dose-response curve, symmetrical about...
• Lognormal Distribution1. A variable X is lognormally distributed if Y = LN(X) is normally distributed with "LN" denoting the...
• LogotypeA graphic design, often simply distinctive lettering that identifies a particular organization; related to...
• log-probit modelDose-response model which assumes that each animal has its own threshold dose, below which no response occurs...
• Lolium arundinaceumTall fescue, previously known as Festuca and Lolium arundinaceum, is a cool season, perennial, sod-forming...
• London ConventionTreaty drafted at Intergovernmental Conference on the Convention on the Dumping of Wastes at Sea, 1972
• Long Distance MigrationA pattern of latitudinal migration used by a species that moves from arctic or temperate regions where it...
• Long normal log1. A resistivity log with AM spacing usually 64 in.; see normal logs.
• Long Term Response ActionRemedial actions at a site involving treatment or other measures to clean up groundwater or surface water...
• Longer-Term Exposure1. Repeated exposure by the oral, dermal, or inhalation route for more than 30 days, up to approximately 10%...
• Longissimus DorsiDeep muscles in the back whose function is to extend and rotate the spine and maintain posture..
• LongitudeThe angular distance east or west of the Prime Meridian at Greenwich, England.
• Longitudinal Data1. Observations collected over a period of time; the sample (instances or cases) may or may not be the same...
• Longitudinal DispersionThe spreading of chemical or biological constituents, including pollutants, downstream from a point source at...
• longitudinal dunesLong ridges of sand parallel to the prevailing wind; these dunes form where sand supplies are limited.
• Longitudinal MigrationMovement of animals between longitudes in which (usually) birds move from east to west or west to east.
• longitudinal ruttingRuts formed along the length of the road from tire pressure.
• Longitudinal StudyThe study of the same group over a period of time. These generally are used in studies of change.
• longitudinal zonesThe longitudinal zones of a river corridor include the headwaters (zone 1), the transfer zone (zone 2), and...
• long-lived infrastructure1. Infrastructure that is likely to be in service for a long time, and therefore may benefit from...
• Long-range school facilities planA way for local education agencies (LEAs) to identify important projections of long-term school and community...
• longshore current1. A near-shore current that flows parallel to the shore.
• longshore transportThe movement of sediment parallel to the shoreline in the surf zone by wave suspension and the longshore...
• LongshoremenDock workers who load and unload ships or perform administrative tasks associated with the loading or...
• Long-Term ActionA response action that eliminates or reduces a release or threatened release of hazardous substances that is...
• Long-term averageThe long-term average (LTA) is the average pollutant concentration that is achieved over a period of time. It...
• Long-Term Cold StorageComplete shutdown of a unit intended to last for an extended period of time (at least two calendar years)...
• Long-term exposureRepeated exposure for more than 30 days, up to approximately 10% of the life span in humans (more than 30...
• Long-Term MonitoringLong-term monitoring of a site typically is performed to verify that contaminants pose no risk to human...
• Long-Term Monitoring DeviceUsed to continuously survey or test to determine the level of compliance with statutory requirements and/or...
• Long-Term SamplingSituation where sampling devices are left unattended for long periods and data about the sample is...
• Long-term StewardshipLong-term management of contaminated environmental media to protect human health and the environment...
• Longwall MiningIn level, tabular ore bodies it is possible to recover virtually all of the ore by using this method (in the...
• Longwave Radiation1. Radiation emitted in the spectral wavelength greater than about 4 micrometers, corresponding to the...
• Lonicera CultivarsExotic bush honeysuckles are upright, generally deciduous shrubs that range from 6 to 15 feet in height. The...
• Lonicera japonicaJapanese honeysuckle is a perennial vine that climbs by twisting its stems around vertical structures...
• Loop MigrationA circular pattern of migration such that the migration pathway in the fall differs from the migration...
• Loose-Fill InsulationInsulation in granular, nodular, fibrous, powdery, or similar form, designed to be installed by pouring...
• LoratadineA second-generation histamine H1 receptor antagonist used in the treatment of allergic rhinitis and...
• LosartanAn antagonist of angiotensin type 1 receptor with antihypertensive activity due to the reduced pressor effect...
• LossAn occurrence that is the basis for submission and/or payment of a claim. Losses can be covered, limited, or...
• Loss of Heterozygosity1. A DNA sequence alteration process in which gain, loss, or exchange of DNA results in loss of function of...
• Loss of Scientific IntegrityFailure, intentional or not, to adhere to the Scientific Integrity Policy or to the principles of honesty...
• Loss RateThe amount of recovered material that is lost during the recycling process,relative to the total amount of...
• Losses (water)Metered source water less revenue-producing water and authorized unmetered water uses.
• Loss-of-Function Plant Incorporated ProtectantPlant-incorporated protectant in which the genetic material of a native gene is modified to result in a...
• Loss-on-Ignition1. Percentage decrease in weight of fiberglass mat measured before and after it has been ignited to burn off...
• lotic systemFlowing waters, as in streams and rivers.
• Lotic WaterFlowing waters, as in streams and rivers.
• Louisiana CoastalThe Louisiana coastal drainage, including islands and associated waters, south of the Red River Basin...
• LoupThe Loup River Basin. Nebraska. Area = 15000 sq.mi.
• Love WaveA Love wave is a surface wave having a horizontal motion that is transverse (or perpendicular) to the...
• LowRelease height of an emission at less than 25m [Orignal source: Humbert et al., 2011].
• Low Altitude ConditionsTest altitude less than 549 meters (1,800 feet).[40 CFR 86.1803-01 (CFR 2018)]
• Low Birth Weight InfantAn infant having a birth weight of 2500 gm. (5.5 lb.) or less but infant, very low birth weight is available...
• Low Carbon Fuel StandardA low carbon fuel standard (LCFS) for transportation fuels is a policy to encourage the utilization of low...
• Low Density Polyethylene1. Refers to a plastic material in which the ethylene molecules are linked in a random fashion with the main...
• Low Dose Extrapolation1. An estimate of the response at a point below the range of the experimental data, generally through the use...
• Low emission vapor degreasersCompletely enclosed, airtight units used to clean off machining oil and other contaminants from metal parts.
• Low Emission VehicleA vehicle meeting the low-emission vehicle standards.
• Low Emissivity WindowsNew window technology that lowers the amount of energy loss through windows by inhibiting the transmission of...
• Low FlowMinimum instantaneous streamflow during periods of low water runoff.
• Low Flow ShowerheadReduces the amount of water flow through the showerhead from 5 to 6 gallons a minute to 3 gallons a minute.
• Low Flush ToiletA toilet that uses less water than a standard one during flushing, for the purpose of conserving water...
• Low Heat Release RateHeat release rate of 730,000 J/sec-m3 (70,000 Btu/hr-ft3) or less.
• Low Idle SpeedSpeed which is less than normal idle speed, expressed as the number of revolutions of the crankshaft per unit...
• Low Impact Development1. A sustainable landscaping approach that can be used to replicate or restore natural watershed functions...
• Low Level Radioactive Waste Policy ActTo set forth a Federal policy for the disposal of low-level radioactive wastes, and for other purposes.
• Low Life ExpectancyAverage life expectancy data developed as a collaboration between NCHS, the National Association for Public...
• Low Load Combustion TurbineStationary combustion turbine that supplies 20 percent or less of its potential electric output as...
• low marsh1. The seaward edge of a salt marsh, usually a narrow band along a creek or ditch which is flooded at every...
• Low Mass Emissions UnitAffected unit that is “gas-fired” or “oil-fired” (as defined in this section), and that qualifies to use the...
• Low Mileage Locomotive1. Locomotive during the interval between the time that normal assembly operations and adjustments are...
• Low Nitrogen Oxides BurnerCommercially available combustion modification NOX controls that minimize NOX formation by introducing coal...
• Low Nitrogen Oxides Burner TechnologyCommercially available combustion modification NOX controls that minimize NOX formation by introducing coal...
• Low NOx BurnersOne of several combustion technologies used to reduce emissions of Nitrogen Oxides (NOx.)
• Low Occupancy AreaAny area where PCB remediation waste has been disposed of on-site and where occupancy for any individual not...
• Low Oxygen/HypoxiaLow Oxygen (oxygen depletion) levels in water can occur naturally for short periods, but when they are...
• Low Power TelevisionA broadcast service that permits program origination, subscription service or both via low powered television...
• Low Pressure Gas WellWell with reservoir pressure and vertical well depth such that 0.445 times the reservoir pressure (in psia)...
• Low Pressure ProcessProduction process for the manufacture of low density polyethylene in which a reaction pressure markedly...
• Low Pressure WellWell that satisfies at least one of the following conditions: (1) The static pressure at the wellhead...
• Low Public Exposure LandLand that the public uses infrequently. This includes, but is not limited to, agricultural land, forest, and...
• Low Rolling Resistance Tire1. Tire on a vocational vehicle with a TRRL at or below of 7.7 kg/metric ton, a steer tire on a tractor with...
• Low Solids CoatingContaining 0.12 kilogram or less of solids per liter (1 pound or less of solids per gallon) of coating...
• Low Utilization Electric Generating UnitAny electric generating unit for which the facility owner certifies, and annually recertifies, under §...
• Low Viscosity Poly(ethylene Terephthalate)Poly(ethylene terephthalate) that has an intrinsic viscosity of less than 0.75 and is used in such...
• Low Volume High Concentration Collection SystemGas collection and transport system used to convey gases from the LVHC system to a control device.
• Low Volume Waste Source1. Taken collectively as if from one source, wastewater from all sources except those for which specific...
• Low Water Use General ProcessingInternal subdivision of the low water use processing subcategory for facilities described in § 410.30 that do...
• Low Water-Use LandscapingUse of plant materials that are appropriate to an area's climate and growing conditions (usually native and...
• Low-Bleed Pneumatic DeviceAutomated flow control devices powered by pressurized natural gas and used for maintaining a process...
• Low-Burden MethodApproach to a process, such as data collection, which minimizes the effort involved in the process.
• Low-Concentration Constituent1. For purposes of fluorinated GHG production and export, a fluorinated GHG constituent of a fluorinated GHG...
• Low-Concentration Polychlorinated BiphenylsPCBs that are tested and found to contain less than 500 ppm PCBs, or those PCB-containing materials which EPA...
• Low-Contact Industrial SurfaceExamples of low-contact industrial surfaces include ceilings, walls, floors, roofs, roadways and sidewalks in...
• low-dose linear modelA low-dose-linear model is one whose slope is greater than zero at a dose of zero. A low-dose-linear model...
• Low-Emission ValveValve (including its specific packing assembly) for which the manufacturer has issued a written warranty or...
• Low-Emission Valve PackingValve packing product for which the manufacturer has issued a written warranty or performance guarantee that...
• Low-emissivity coatingA film or thin coating applied to the surface of glass to reduce heat transfer through a window. Low-e...
• Low-Emissivity WindowEnergy-efficient windows that have a coating or film applied to the surface of the glass to reduce heat...
• Low-End RiskA risk descriptor representing the low-end, or lower tail of the risk distribution, such as the 5th or 25th...
• Lower ArkansasThe Arkansas River Basin below Keystone Dam to the point of highest backwater effect of the Mississippi River...
• lower beachSlightly inland from the psammolittoral beach.
• Lower Body Anti-Chip CoatingAnti-chip coating applied to lower body surfaces such as rocker panels, valence panels, lower portions of...
• Lower BrazosThe Brazos River Basin below the Castleman Creek Basin. Texas. Area = 15600 sq.mi.
• Lower CanadianThe Canadian River Basin below its intersect with the New Mexico-Texas state line to the confluence with the...
• Lower ChesapeakeThe Chesapeake Bay and its tributary drainage south of the Maryland-Virginia state line excluding the...
• Lower CimarronThe Cimarron River Basin below the river's most downstream intersect with the Kansas-Oklahoma state line to...
• Lower ColoradoThe Colorado River Basin within the United States below Hoover Dam, excluding the Gila River Basin. Arizona...
• Lower Colorado RegionThe drainage within the United States of: (a) the Colorado River Basin below the Lee Ferry compact point...
• Lower Colorado-Lake MeadThe Colorado River Basin from the Lee Ferry compact point to Hoover Dam, but excluding the Little Colorado...
• Lower Colorado-San Bernard CoastalThe Colorado River Basin below the Oak Creek Basin; and the Coastal drainage and associated waters from the...
• Lower ColumbiaThe Columbia River Basin below Bonneville Dam, excluding the Willamette River Basin. Oregon, Washington. Area...
• Lower Confidence Limit ApproachSet of approval criteria that must be met so that data from an alternative test method can be used in...
• Lower Detection Limit1. The smallest signal above background noise an instrument can reliably detect.
• lower explosive limit1. The concentration of a gas below which the concentration of vapors is insufficient to support an...
• Lower ExtremityThe region of the lower limb, extending from the gluteal region to the foot, and including the buttocks; hip...
• Lower Gastrointestinal TractThe lower part of the gastrointestinal tract that includes the jejunum and ileum of the small intestine and...
• Lower GilaThe Gila River Basin below the confluence with the Salt River Basin to the confluence with the Colorado...
• Lower GreenThe Green River Basin below the confluence with the Yampa River Basin, but excluding the Yampa and White...
• Lower heating valueQuantity of heat liberated by the complete combustion of a unit volume or weight of a fuel assuming that the...
• Lower Hudson-Long IslandThe coastal drainage and associated waters from the Byram River Basin boundary, to the Manasquan River Basin...
• Lower IllinoisThe Illinois River Basin below the confluence of the Fox River Basin. Illinois. Area = 17700 sq.mi.
• Lower limit of detectionThe smallest amount of sample activity which will yield a net count for which there is confidence at a...
• Lower Limit of Quantitation1. The lowest concentration at which the laboratory has demonstrated target analytes can be reliably measured...
• Lower Limit on Effective Dose ₁₀The 95% lower confidence limit of the dose of a chemical needed to produce an adverse effect in 10 percent of...
• Lower MississippiThe Mississippi River below the Bonnet Carre Floodway, and the Coastal drainage, including islands and...
• Lower Mississippi RegionThe drainage of: (a) the Mississippi River below its confluence with the Ohio River, excluding the Arkansas...
• Lower Mississippi-Big BlackThe Mississippi River Basin from the Yazoo River Basin to the Lower Old River drainage boundary, but...
• Lower Mississippi-HatchieThe Mississippi River Basin from the confluence of the Ohio River to and including the Horn Lake Creek Basin...
• Lower Mississippi-Lake MaurepasThe Mississippi River Basin from the Lower Old River drainage boundary to the Bonnet Carre Floodway, and...
• Lower Mississippi-St. FrancisThe Mississippi River Basin from the Horn Lake Creek Basin on the east bank to and including the Arkansas and...
• Lower Mississippi-YazooThe Mississippi River Basin from the Arkansas River Basin to and including the Yazoo River Basin; excluding...
• Lower MissouriThe Missouri River Basin below the confluence with the Kansas River Basin to the confluence with the...
• Lower OhioThe Ohio River Basin below the confluence with the Kentucky River Basin, to the confluence with the...
• Lower PecosThe Pecos River Basin from and including the Delaware River Basin to the confluence with the Rio Grande. New...
• Lower Red-OuachitaThe Red River Basin below the Bayou Rigolette Basin, excluding the Boeuf and Tensas River Basins. Arkansas...
• Lower Rio GrandeThe drainage within the United states of the Rio Grande Basin from Falcon Reservoir to the Gulf of Mexico...
• Lower SnakeThe Snake River Basin below Hells Canyon Dam to its confluence with the Columbia River. Idaho, Oregon...
• Lower SteamPortion of assist steam piped to an exterior annular ring near the lower part of a flare tip, which then...
• Lower TennesseeThe Tennessee River Basin below Pickwick Dam. Kentucky, Mississippi, Tennessee. Area = 8010 sq.mi.
• Lower Water ColumnThe area below the pycnocline (or, if absent, below mid-depth in the water column), the lower portion of the...
• Lower YellowstoneThe Yellowstone River Basin below the confluence with the Big Horn River Basin, excluding the Tongue and...
• Lowest Acceptable Daily DoseThe largest quantity of a chemical that will not cause a toxic effect, as determined by animal studies.
• Lowest Achievable Emission Rate1. Under the Clean Air Act, the rate of emissions that reflects (1) the most stringent emission limitation in...
• Lowest Achievable Emissions RateLowest Achievable Emissions Rate is the emissions control level required of a source seeking a permit in a...
• Lowest Concentration Minimum Reporting Level1. The LCMRL is determined by selected laboratories during method development. It is used to determine the...
• Lowest Observable Adverse Effect ConcentrationThe lowest level of a chemical stressor evaluated in a toxicity test that shows harmful effects on a plant or...
• Lowest Observable Adverse Effect LevelThe lowest level of a chemical stressor evaluated in a toxicity test that shows harmful effects on a plant or...
• Lowest Observed Adverse Effect Level1. The lowest dose in a toxicity study resulting in adverse health effects.
• lowest-observed effect levelIn a study, the lowest dose or exposure level at which a statistically or biologically significant effect is...
• Low-Flow (7Q10)Low-flow (7Q10) is the 7-day average low flow occurring once in 10 years; this probability-based statistic is...
• Low-Formaldehyde ProductIn the context of a coating or contact adhesive, a product concentration of less than or equal to 1.0 percent...
• Low-Gloss CoatingCoating which exhibits a gloss reading less than or equal to 25 on a 60° glossmeter.
• Low-Hour Engine1. Relating to an engine that is considered to have stabilized emissions and represents the undeteriorated...
• Low-IncomeA reference to populations characterized by limited economic resources. The US Office of Management and...
• low-input turfTurf that requires little or no maintenance, i.e., fertilization, irrigation, pesticide applications.
• Low-Level Jet1. A regular, strong, nighttime, northward flow of maritime tropical air over the sloping Great Plains of the...
• Low-Level Radioactive Waste1. Wastes less hazardous than most of those associated with a nuclear reactor; generated by hospitals...
• Low-Level WasteWaste that contains radioactivity and is not classified as high-level, transuranic, or spent nuclear fuel or...
• Low-Loss Fitting1. Any device that is intended to establish a connection between hoses, appliances, or recovery or recycling...
• Low-Mileage VehicleRelating to a vehicle with stabilized emissions and represents the undeteriorated emission level. This would...
• low-mow turfTurf that is only infrequently mowed. Turf under this category would be mowed as little as possible, and...
• Low-Noise-Emission Product DeterminationAdministrator's determination whether or not a product, for which a properly filed application has been...
• Low-Permeability Material1. For gaskets, a material with permeation emission rates at or below 10 (g-mm)/m2/day when measured...
• Low-Pressure Appliance1. An appliance that uses a refrigerant with a liquid phase saturation pressure below 45 psia at 104 °F. This...
• Low-Pressure Sodium LampA type of lamp that produces light from sodium gas contained in a bulb operating at a partial pressure of...
• Low-Priority SubstanceChemical substance that EPA concludes,based on information sufficient to establish, without consideration of...
• Low-Processing PackinghousePackinghouse that processes no more, and usually fewer than, the total number of animals slaughtered at that...
• Low-Slope RoofA low-slope roof is a roof surface with a maximum slope of 2 inches' "rise" for 12 inches' "run" as defined...
• Low-Sulfur Diesel Fuel1. For in-use fuels, low-sulfur diesel fuel means a diesel fuel market as low-sulfur diesel fuel having a...
• Low-Throughput Transfer Rack1. Transfer racks that transfer less than a total of 11.8 million liters per year (3.12 million gallons per...
• L(Q) Quantitation Definitions - Quantification LimitThe smallest detectable concentration of analyte greater than the detection limit where the required*...
• LTAThe long-term average (LTA) is the average pollutant concentration that is achieved over a period of time. It...
• L-TyrosineThe levorotatory isomer of the aromatic amino acid tyrosine. L-tyrosine is a naturally occurring tyrosine and...
• Lubricant1. A substance used to reduce friction between bearing surfaces or as a process material, either incorporated...
• LuciferaseThe enzyme which activates luciferin, in the presence of ATP, to produce bioluminescence.
• Luggage VolumeFor cars, this is trunk luggage volume. For hatchbacks and station wagons, this is the luggage volume behind...
• LumberBoards or planks sawed or split from logs or timber, including logs or timber processed for use as utility...
• Lumber Kiln1. Enclosed dryer operated by applying heat to reduce the moisture content of lumber.
• Lumbosacral RegionRegion of the back including the lumber vertebrae, sacrum, and nearby structures.
• Luminescent MaterialMaterials that emit light upon excitation by such energy sources as photons, electrons, applied voltage...
• Lumped ModelA model in which the physical characteristics of the catchment are assumed to be homogeneous.
• Lumpy Skin DiseaseA poxvirus infection of cattle characterized by the appearance of nodules on all parts of the skin.
• Lumpy Skin Disease VirusA species of CAPRIPOXVIRUS causing a cattle disease occurring in Africa.
• Lung1. One of a pair of viscera occupying the pulmonary cavities of the thorax, the organs of respiration in...
• Lung Cancer1. A carcinoma originating in the lung. Lung carcinomas usually arise from the epithelium that lines the...
• Lung Carcinoma1. A carcinoma originating in the lung. Lung carcinomas usually arise from the epithelium that lines the...
• Lung Diffusion Capacity TestThe lung diffusion capacity test is a pulmonary function test that measures how your lungs and airways...

1,023 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.