Environment terminology · MLC-0121
Environment terms: T (1,357)
- Transmissive FaultFault or fracture that has sufficient permeability and vertical extent to allow fluids to move between...
- Transmissive FractureFault or fracture that has sufficient permeability and vertical extent to allow fluids to move between...
- Transmissivity1. Rate at which water of the prevailing kinematic viscosity is transmitted through a unit width of the...
- TransmitAs defined in § 3.3 of CROMERR, successfully and accurately convey an electronic document so that it is...
- TransmittanceTransmittance is the fraction of radiant energy that, having entered a layer of absorbing material, reaches...
- Transmix BlenderAny person who owns, leases, operates, controls, or supervises a transmix blending facility.
- Transmix Blending FacilityAny facility that produces gasoline by blending transmix into PCG under § 1090.500.
- Transmix Distillate ProductThe diesel fuel blendstock that is produced when transmix is separated into blendstocks at a transmix...
- Transmix FuelAny of the following mixtures of fuels, which no longer meet the specifications for a fuel that can be used...
- Transmix Gasoline ProductThe gasoline blendstock that is produced when transmix is separated into blendstocks at a transmix processing...
- Transmix Processing FacilityAny facility that produces TGP or TDP from transmix by distillation or other refining processes, but does not...
- Transmix ProcessorAny person who owns, leases, operates, controls, or supervises a transmix processing facility. A transmix...
- Transparency1. The clarity and completeness with which data, assumptions and methods of analysis are documented...
- Transparency (Model)The clarity and completeness with which data, assumptions, and methods of analysis are documented...
- Transparency (Physico-Chemical Property)Ability to transmit light through the substance without image distortion.
- Transparency (Risk Assessment)1. Conducting a risk assessment in such a manner that all of the scientific analyses, uncertainties...
- TransparentReadily accessible and understandable by all community members (e.g., decision-making criteria and...
- Transpiration1. Escape of water from plants through pores in the leaves.
- TransportTransport in the environment refers to movement within a medium or between media.
- Transport Equipment ManufacturingIndustries in the Transportation Equipment Manufacturing subsector produce equipment for transporting people...
- Transport of Pollutants (in Water)Transport of pollutants in water involves two main processes: (1) advection, resulting from the flow of...
- Transport ProcessAny subcellular or molecular process involved in translocation of a biological entity, such as a...
- Transport ProteinsTransport proteins that carry specific substances in the blood or across cell membranes.
- Transport Vehicle1. Cargo tank or tank car.
- Transport Water1. Any wastewater that is used to convey fly ash, bottom ash, or economizer ash from the ash collection or...
- Transportation1. The physical network and services needed for transportation, can include roads, highways, rail and air...
- Transportation AccessThe Average of Transportation Indicator uses an average of four transportation-related indicator percentiles...
- Transportation and WarehousingThe Transportation and Warehousing sector includes industries providing transportation of passengers and...
- Transportation, Communications and Utilities LandThe land uses included in the Transportation, Communications, and Utilities category occur to some degree...
- Transportation ConformityTransportation conformity applies to transportation plans, transportation improvement programs, or Federal...
- Transportation Construction Project1. A project that includes uses such as highways and bridges.
- Transportation ContainerA box made of aluminum, steel or fiberglass used to transport cargo by ship, rail, truck or barge. Common...
- Transportation Control Measure1. Any measure that is directed toward reducing emissions of air pollutants from transportation sources. Such...
- Transportation Control MeasuresSteps taken by a locality to reduce vehicular emission and improve air quality by reducing or changing the...
- Transportation EmissionEmissions from energy used to transport materials, including transport of manufactured product to...
- Transportation EmissionsEmissions from energy used to transport materials, including transport of manufactured product to...
- Transportation End-Use SectorConsists of private and public vehicles that move people and commodities. Included are automobiles, trucks...
- Transportation Equipment1. Any transportation equipment for which regulations have been promulgated under this part and includes...
- Transportation Equipment EngineEngine specifically used in vehicles and other transportation equipment.
- Transportation Equity Act for the 21st CenturyTo authorize funds for Federal-aid highways, highway safety programs, and transit programs, and for other...
- Transportation FuelFuel for use in motor vehicles, motor vehicle engines, nonroad vehicles, or nonroad engines (except fuel for...
- Transportation Fuel Importer1. Any U.S. domestic person who:(1) Brings transportation fuel or renewable fuel into the 48 contiguous...
- Transportation Improvement ProgramTransportation improvement program developed by a metropolitan planning organization under 23 U.S.C. 134(j).
- Transportation Plan1. A plan that provides strategies for the operation, provision, and management of facilities and services...
- Transportation Plan LapseConformity determination for a transportation plan or TIP has expired, and thus there is no currently...
- Transportation ProjectHighway project or a transit project.
- Transportation WorkerA person whose employment involves the movement of passengers or goods.
- Transportation-relatedInterstate and intrastate onshore and offshore pipeline systems, including pumps and related appurtenances...
- Transportation-Related FacilityAs applied to an onshore or offshore facility, are defined in the Memorandum of Understanding between the...
- Transportation-Related Offshore Facility1. Onshore and offshore terminal facilities including transfer hoses, loading arms and other equipment and...
- Transportation-Related Onshore Facility1. Onshore and offshore terminal facilities including transfer hoses, loading arms and other equipment and...
- Transporter1. Any person engaged in the off-site transportation of hazardous waste by air, rail, highway, or water.
- TransshipmentContinuous shipment of nitrous oxide or a fluorinated GHG from a foreign state of origin through the United...
- TransuranicElements with atomic numbers higher than uranium (92). For example, plutonium and americium are transuranics.
- Transuranic ElementsElements with atomic numbers higher than uranium (92). For example, plutonium and americium are transuranics.
- Transuranic Radioactive WasteAs used in this part, means waste containing more than 100 nanocuries of alpha-emitting transuranic isotopes...
- Transuranic Waste1. Waste materials containing elements with atomic numbers higher than uranium (92).
- transverse dunesA series of long ridges at right angles to the prevailing wind; these dunes form where vegetation is sparse...
- Tranzschel’s LawCommonly a heteroecious, macrocyclic rust species has a correlated autoecious, microcyclic form that occurs...
- Trap CropA plant that in interspersed in a crop or planted near a crop as a decoy for the purpose of attracting...
- Trash1. Material considered worthless or offensive that is thrown away. Generally defined as dry waste material...
- Trash AggregationAggregations of submerged, floating or suspended trash. These may be loose and mobile as when floating at the...
- Trash PileA pile consisting primarily of paper, garbage, or discarded nondurable goods that contain or have contained a...
- Trash-to-Energy PlanBurning trash to produce energy.
- TravelTravel involves the activities associated with planning, preparation and monitoring of business-related...
- Travel Cost ModelRevealed preference method for valuation that is done by estimating how much people spend to travel to a...
- Travel DistanceThe shortest overland distance an individual would travel from a residence or school to the nearest area of...
- travel timeThe time it takes a contaminant to travel from the source to a particular point downgradient.
- TreadLoad-bearing surface of a trail or road.
- Tread End Cementing OperationSystem used to apply cement to one or both ends of the tread or combined tread/sidewall component. A tread...
- Treatability GroupA grouping of hazardous wastes that can be treated to similar concentrations using identical technologies.
- Treatability Manual1. Five-set library of EPA guidance manuals that contain information related to the treatability of many...
- Treatability StudiesTests of potential cleanup technologies conducted in a laboratory.
- Treatability Study1. Study in which a hazardous waste is subjected to a treatment process to determine: (1) Whether the waste...
- Treated BiogasProduct that meets all the following requirements:(1) It is produced from biogas. (2) It does not require...
- Treated Landfill GasLandfill gas processed in a treatment system as defined in this subpart.
- Treated municipal wastewaterTreated wastewater effluent discharged from a centralized wastewater treatment plant of any size. Other terms...
- Treated Regulated Medical WasteMedical waste treated to substantially reduce or eliminate its pathogenicity, but that has not yet been...
- Treated Wastewater1. Wastewater that has been subjected to one or more physical, chemical, and biological processes to reduce...
- Treated WaterWater treated to meet drinking water standards.
- Treatment1. Any method, technique, or process designed to remove solids and/or pollutants from solid waste...
- Treatment as stateSeveral federal environmental laws authorize EPA to treat eligible federally-recognized Indian tribe in the...
- Treatment for destructionThe destruction of a toxic chemical in waste such that the substance is no longer the toxic chemical subject...
- Treatment for Energy Recovery1. EPA considers an EPCRA Section 313 chemical to be combusted for energy recovery if the toxic chemical has...
- Treatment Group1. The subjects of the intervention being studied.
- Treatment PlantA structure built to treat wastewater before discharging it into the environment.
- Treatment Process1. Intended to prepare hydrocarbon streams for additional processing and to prepare finished products...
- Treatment StandardsLDR criteria that hazardous waste must meet before it is disposed.
- Treatment, Storage, and Disposal FacilitiesFacilities engaged in the treatment, storage, or disposal of hazardous waste. These facilities are the last...
- Treatment, Storage, and Disposal Facility1. Refers to any facility which treats, stores, or disposes of hazardous wastes.
- Treatment, Storage, Disposal FacilitiesFacilities engaged in the treatment, storage, or disposal of hazardous waste.
- Treatment System1. Any technology or combination of technologies (treatment trains or unit processes) that discharges treated...
- Treatment TechniqueA required process intended to reduce the level of a contaminant in drinking water.
- Treatment technique requirement1. A requirement of the national primary drinking water regulations which specifies for a contaminant a...
- Treatment Technique Requirement (regulatory)A requirement of the national primary drinking water regulations which specifies for a contaminant a specific...
- Treatment TechnologiesProcesses applied to hazardous waste or contaminated materials, to permanently alter their condition through...
- Treatment Technology1. Any unit operation or series of unit operations that alters the composition of a hazardous substance or...
- Treatment technology categoryGroup of technologies that can be searched in the ELG Database for applicable point source categories...
- Treatment VariableAn independent variable in program evaluation that is of particular interest because it corresponds to a...
- Treatment Works1. Federally owned, publicly owned, or privately owned device or system used to treat (including recycle and...
- Treatment Works ConstructionErection, acquisition, alteration, remodeling, improvement or extension of treatment works.
- Treatment Works Construction Step 1Facilities planning.
- Treatment Works Construction Step 2Preparation of design drawings and specifications.
- Treatment Works Construction Step 2 and 3Design and building of a treatment works and building related services and supplies.
- Treatment Works Construction Step 3Building of a treatment works and related services and supplies.
- Treatment Works Construction Step 7Design/building of treatment works wherein a grantee awards a single contract for designing and building...
- Treatment Works PhaseTreatment works phase or segment may be any substantial portion of a facility and its interceptors described...
- Treatment Works ReplacementObtaining and installing equipment, accessories, or appurtenances which are necessary during the design or...
- Treatment Works Treating Domestic Sewage1. Includes all POTWs and other facilities that treat domestic wastewater, and facilities that do not treat...
- Treatment ZoneSoil area of the unsaturated zone of a land treatment unit within which hazardous constituents are degraded...
- TreeA woody perennial, usually singlestemmed plant that has a definite crown shape and reaches a mature height of...
- Tree AnatomyParts of a tree that make up its structure.
- Tree BoleThe main stem of a tree of substantial diameter - roughly, capable of yielding sawtimber, veneer logs, or...
- Tree BoxStormwater controls that direct stormwater discharges to a treebox, where it can be filtered by the soil and...
- Tree CavityOpenings in tree trunks and branches due to injury or disease.
- Tree Crown1. The branches and foliage of a tree above the main trunk or stem.
- Tree DiseasesDiseases leading to the decline and/or death of trees of many kinds.
- Tree FarmParcel of land on which trees are planted, cultured, managed, and harvested as a crop. Also, privately owned...
- Tree FellingThe process of cutting down standing trees.
- Tree PhysiologyThe physiological processes, properties, and states characteristic of trees.
- Tree PlantationStand of no less than 1 acre composed primarily of trees established by hand- or machine-planting of a seed...
- Tree ResidueSlash and any woody residue generated during the processing of planted trees from tree plantations for use in...
- Tree RootUsually underground tree parts that are responsible for the transport of water, nutrients and oxygen from the...
- Tree StumpsRefers to the portion of a tree remaining after it has been cut. Tree stumps are categorized as yard...
- Tree ThrowThe displacement of sediment held by the roots of a toppling tree; uprooting.
- Tree TrunkThe main stem of a tree of substantial diameter - roughly, capable of yielding sawtimber, veneer logs, or...
- TrefoilThe official radiation warming symbol; a magenta or black trefoil on a yellow background. It must be...
- Tremie1. (TREH-me) A device used to place concrete or grout under water.
- tremie pipeA flexible or rigid pipe used to convey grout to the bottom of a boring or probe hole.
- TremoliteA mineral in the amphibole group, that occurs as a series in which magnesium and iron can freely substitute...
- TrenchTrenches in the physiographic setting subcomponent occur at a smaller spatial scale than the...
- Trend1. The change in a series of data over a period of years that remains after the data have been adjusted to...
- Trend analysis1. A formal statistical process used to determine the presence or absence of changes in measures of water...
- Trend Assessment SurveyPlanned sampling or measurement of parameters at set stations or in set areas in and near disposal sites for...
- Trend Surface AnalysisA surface interpolation method that fits a polynomial surface by least-squares regression through the sample...
- TrendsThe changes in the distribution of scores for condition indicators over multiple time periods.
- TretinoinAn important regulator of gene expression during growth and development, and in neoplasms. Tretinoin, also...
- TRI Chemicals Pollutant CategoryAll pollutants that are associated with chemicals that are reported to TRI...
- Trial Burn1. An incinerator test in which emissions are monitored for the presence of specific organic compounds...
- TriamcinoloneA glucocorticoid given, as the free alcohol or in esterified form, orally, intramuscularly, by local...
- TriamtereneA pteridinetriamine compound that inhibits sodium reabsorption through sodium channels in renal epithelial...
- triangular distribution1. A statistical distribution which requires the identification of high, low, and most likely values for each...
- Triangulation1. The combination of methodologies in the study of the same phenomenon or construct; a method of...
- Triazine HerbicideA class of herbicides containing a symmetrical triazine ring (a nitrogen-heterocyclic ring composed of three...
- TriazinesHeterocyclic rings containing three nitrogen atoms, commonly in 1,2,4 or 1,3,5 or 2,4,6 formats. Some are...
- Tribal Cession BoundariesU.S. Forest Service-defined boundaries (https://memory.loc.gov/ammem/amlaw/lwss-ilc.html) depicting lands...
- Tribal ChairpersonThe person who is recognized by the Bureau of Indian Affairs as the chief elected administrative officer of...
- Tribal Chairperson or Equivalent Elected OfficialThe person who is recognized by the Bureau of Indian Affairs as the chief elected administrative officer of...
- Tribal Chief Executive OfficerThe person who is recognized by the Bureau of Indian Affairs as the chief elected administrative officer of...
- Tribal CommunityA group of persons who may share similar beliefs, ancestors, and practices.
- Tribal ConsortiumGroup of two or more Indian tribes.
- Tribal Education AgencySchool or community college which is controlled by an Indian tribe, band, or nation, including any Alaska...
- Tribal Environmental AgreementDynamic, strategic planning document negotiated by the Regional Administrator and an appropriate Tribal...
- Tribal Government-to-Government RelationshipThe federal government considers each tribal government a distinct entity with sovereign powers. On April 29...
- Tribal Grant Program CWA Section 106Section 106 of the Clean Water Act (CWA) authorizes EPA to provide financial assistance to states and...
- Tribal Implementation Plan1. Plan to implement the national ambient air quality standards adopted and submitted by a federally...
- Tribal LandThis layer represents locations of American Indian Tribal lands in the lower 48 states and Alaska. The areas...
- Tribal Lands1. Lands that are either held in trust by the Bureau of Indian Affairs (BIA) or other lands under the direct...
- Tribal Lands and Indigenous AreasEPA makes no claims regarding the accuracy or precision of data concerning Indian country locations or...
- Tribal Plan1. Plan submitted by a tribal authority pursuant to 40 CFR parts 9, 35, 49, 50, and 81 to implement and...
- Tribal Reserved RightsRights to CWA-protected aquatic and/or aquatic-dependent resources reserved by right holders, either...
- Tribal Rights HolderFederally recognized Tribes holding Tribal reserved rights, regardless of whether the Tribe exercises...
- Tribal Sovereignty“Sovereignty” is the authority that a government draws on to govern. In the U.S., sovereignty is considered...
- Tribal StakeholderPertains to American Indians, Alaskan Natives, Native Hawaiians and other indigenous peoples.
- Tribe1. "Tribe" means an Indian or Alaska Native tribe, band, nation, pueblo, village or community that the...
- TribesWhen used in this document, “tribes” refers to federally recognized tribes. Federally recognized tribes...
- Tributaries of the Great Lakes SystemAll waters of the Great Lakes System that are not open waters of the Great Lakes, or connecting channels.
- Tributary1. A lower order stream compared to a receiving waterbody. "Tributary to" indicates the largest stream into...
- Tributary strategiesRiver-specific cleanup plans that detail the actions needed to achieve nutrient and sediment cap load...
- Tributary StrategyRiver-specific cleanup plans that detail the actions needed to achieve nutrient and sediment cap load...
- Tributyl TinOrganotin compounds with the (C4H9)3Sn group. A biocide
- Tributyltin ChlorideC12H27ClSn. The chloride salt of tributyltine. Used as a processing aid, specific to petroleum production.
- Trichloroacetic Acid1. A strong acid used as a protein precipitant in clinical chemistry and also as a caustic for removing warts.
- Trichloroethane(try-KLOR-o-ETH-hane) An organic chemical used as a cleaning solvent that causes adverse health effects in...
- TrichloroethenePlease see the ATSDR fact sheet for TCE.
- Trichloroethylene1. A stable, low boiling-point colorless liquid, toxic if inhaled. Used as a solvent or metal degreasing...
- TrichodermaA mitosporic fungal genus frequently found in soil and on wood. It is sometimes used for controlling...
- Trichoderma asperellum Strain ICC 012pesticide [Original source...
- Trichoderma gamsii Strain ICC 080pesticide [Original source...
- Trichoderma harzianum Rifai Strain T-39The fungal active ingredient, Trichoderma harzianum Rifai strain T-39, (PC Code 119200) is a naturally...
- Trichoderma harzianum,67892-31-3pesticide [Original source...
- Trichoderma virens strain G-4pesticide [Original source...
- TrichomePlant hair
- TrichothecenesTrichothecene mycotoxins might be weaponized and dispersed through the air or mixed in food or beverages...
- Trickle IrrigationMethod in which water drips to the soil from perforated tubes or emitters.
- Trickling FilterA coarse treatment system in which wastewater is trickled over a bed of stones or other material covered with...
- TriclosanTriclosan is an ingredient added to many consumer products to reduce or prevent bacterial contamination. It...
- Triethanolamine ZirconateThe zirconate (oxyanion containing zirconium) salt of triethanolamine which is a strong base and both a...
- Triethylene GlycolMolecular Formula: C6H14O4 .Triethylene glycol is a colorless liquid with a mild odor. Dense than water...
- TriggerRefers to the conditions or events that activate coverages included in an insurance policy.
- Trigger Point for Change OutResidual weight or pressure of a gas container type that a facility uses to change out that gas container.
- Triglyceride MetabolismTriglyceride Metabolism involves anabolic and catabolic biochemical changes to triglycerides.
- Trihalomethane1. One of a family of organic compounds named as derivatives of methane. THMs are generally the by-products...
- Trihalomethanes1. Methanes substituted with three halogen atoms, which may be the same or different.
- TriiodothyronineA thyroid hormone containing 3 iodine atoms generally synthesized from levothyroxine, and has greater...
- TrimThe cutting of the finished product to the correct size. Marks are incorporated on the printed sheet to show...
- TRI-MEwebFacilities prepare and submit Toxics Release Inventory (TRI) reporting forms using TRI-MEweb. This software...
- TrinityThe Trinity River Basin above Trinity Bay. Texas. Area = 18000 sq.mi.
- Trip Blank1. A clean sample of a matrix that is taken from the laboratory to the sampling site and transported back to...
- Triple Bottom LineA phrase describing a company's improved top line financial performance over the long term due to sustainable...
- Triple Superphosphate PlantAny facility manufacturing triple superphosphate by reacting phosphate rock with phosphoric acid. A...
- tripolyphosphatesSalts with P3O10-5 anion. Most common is sodium tripolyphosphate [Na5P3O10].
- TrippingThe process of removing and/or replacing pipe from the well when it is necessary to change the bit or other...
- Tri-State Mining DistrictLead-zinc mining areas of Ottawa County, Oklahoma, Cherokee County of southeast Kansas and Jasper, Newton...
- Triticum spp.Wheat ranks third among U.S. field crops in both planted acreage and gross farm receipts, behind corn and...
- TritiumA radioactive isotope of the element hydrogen (chemical symbol H).
- Trivalent ChromiumForm of chromium in a valence state of + 3.
- Trivalent Chromium ProcessProcess used for electrodeposition of a thin layer of chromium onto a base material using a trivalent...
- TroglitazoneAn orally-active thiazolidinedione with antidiabetic and hepatotoxic properties and potential antineoplastic...
- TroglyceridemiaExcess of triglycerides in the blood
- TronaRaw material (mineral) used to manufacture soda ash; hydrated sodium bicarbonate carbonate (e.g...
- TrophallaxisThe mutual exchange of food between insects, especially between adults and larvae in social insects.
- trophicStatus characterization of the condition of a body of water as eutrophic, oligotrophic or mesotrophic...
- Trophic Level1. A functional classification of taxa within a community that is based on feeding relationships (e.g...
- Trophic Levels1. A functional classification of species that is based on feeding relationships (e.g. generally aquatic and...
- Trophic StatusAvailable phosphate content and subsequent biological productivity.
- Tropical Air MassAir mass characteristic of the tropics
- Tropical and Subtropical CropCrops that thrive in the warm and wet climates surrounding the Equator, such as sugarcane, citrus and...
- Tropical CycloneA warm-core, non-frontal synoptic-scale cyclone, originating over tropical or subtropical waters with...
- Tropical DiseasesInfectious and parasitic diseases endemic in tropical and subtropical zones, often water- or insect-borne.
- Tropical StormSwirling storm characterized by a low-pressure center and numerous thunderstorms that produce strong winds...
- TropicsThe parts of the Earth near the Equator, which are very warm all year long because they receive a lot of...
- TropismThe directional growth of an organism in response to an external stimulus such as light, touch, or gravity...
- TroponinOne of the minor protein components of skeletal and cardiac muscles. It functions as the calcium-binding...
- Troponin IA TROPONIN complex subunit that inhibits ACTOMYOSIN ATPASE activity thereby disrupting ACTIN and MYOSIN...
- Troponin TA TROPONIN complex subunit that binds to TROPOMYOSIN. There are three troponin T subtypes: troponin T1, T2...
- TropopauseThe tropopause marks the limit of the troposphere and the beginning of the stratosphere. The temperature...
- Troposphere1. The region of the atmosphere closest to the Earth. The troposphere extends from the surface up to about 10...
- Troposphere ConstituentGases, particles, ions, vapors, and aerosols in the earth's troposphere.
- Troposphere GasConstituents of the earth's troposphere that are gases
- Troposphere Gas FormationMechanisms by which gases are added to the troposphere
- Troposphere ParticleParticulate matter in the lower part of Earth's atmosphere of natural as well as anthropogenic origins.
- Tropospheric Ozone FormationTropospheric ozone is made when atmospheric nitrogen oxides, carbon monoxide and volatile organic compounds...
- TruckHeavy automotive vehicles used to transport cargo. In the maritime industry, cargo is often carried by...
- Truck Bed Liner CoatingAny coating, excluding color coats, labeled and formulated for application to a truck bed to protect it from...
- Truck DumpingUnloading of nonmetallic minerals from movable vehicles designed to transport nonmetallic minerals from one...
- Truck Loading StationPortion of a metallic mineral processing plant where metallic minerals or metallic mineral concentrates are...
- Truck Loading TerminalAny facility that dyes NRLM diesel fuel or ECA marine fuel, pays taxes on motor vehicle diesel fuel per IRS...
- Truck Unloading StationPortion of a metallic mineral processing plant where metallic ore is unloaded from a truck into a hopper...
- Trucked BatteryBatteries moved into or out of the plant by truck when the truck is actually washed in the plant to remove...
- TrucksHeavy automotive vehicles used to transport cargo. In the maritime industry, cargo is often carried by...
- True Cost AccountingIs a less used synonym for full cost accounting.
- True Minor SourceSource, not including the exempt emissions units and activities listed in § 49.153(c), that emits or has the...
- TruncationThe process of setting lower and upper limits on the range of a distribution, in order to avoid unrealistic...
- TrunkA sewer, also known as a main sewer, that receives the discharge of one or more sub main sewers.
- Trunk (Sewer)Sewer, also known as a main sewer, that receives the discharge of one or more sub main sewers.
- Trust Fund1. A financial mechanism by which a facility can set aside money in order to cover the TSDF financial...
- Trust Fund (CERCLA)A fund set up under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA) to help...
- Trust LandsLands that are held in trust by the United States government for Indian tribes and individuals. No law...
- TrusteeA Federal, State or Tribal agency designated by the President to act on behalf of the public in assessing the...
- TrypanosomaA genus of flagellate protozoans found in the blood and lymph of vertebrates and invertebrates, both hosts...
- Trypanosoma brucei bruceihemoflagellate subspecies of parasitic protozoa that causes nagana in domestic and game animals in Africa. It...
- Trypanosoma vivaxAn active blood parasite that is present in practically all domestic animals in Africa, the West Indies, and...
- TrypanosomiasisInfection with protozoa of the genus Trypanosoma.
- TSCA Experimental Release ApplicationExemption request for a research and development activity, which is not eligible for a full exemption from...
- TSCA PCB Coordinated ApprovalProcess used to recognize other Federal or State waste management documents governing the storage, cleanup...
- Tsuga canadensisEastern or Canada hemlock. A conifer native to eastern North America
- TsunamiA large long-wavelength (tens or hundreds of kilometers) ocean wave that is generated by a powerful undersea...
- TTYA type of machine that allows people with hearing or speech disabilities to communicate over the phone using...
- Tube DryerSingle-stage or multi-stage dryer operated by applying heat to reduce the moisture of wood fibers or...
- Tube FootExtension of the water-vascular system of echinoderms, protruding from the body and often ending in suckers...
- Tube ReducingOperation which reduces the diameter and wall thickness of tubing with a mandrel and a pair of rolls with...
- Tube Settler1. A device that uses bundles of small bore (2 to 3 inches or 50 to 75 mm) tubes installed on an incline as...
- Tuber1. The starchy storage organ of a plant which is a short and thickened subterranean stem or root (e.g...
- Tubercle(TOO-burr-cull) A protective crust of corrosion products (rust) which builds up over a pit caused by the loss...
- Tuberculation1. (too-BURR-que-LAY-shun) The development or formation of small mounds of corrosion products (rust) on the...
- TuberculocideSubstance, or mixture of substances, that destroys or irreversibly inactivates tubercle bacilli in the...
- TubingA small-diameter pipe installed inside the casing of a well. Tubing conducts injected fluids from the...
- Tubing SystemPiping equal to or less than one half inch diameter as per nominal pipe size.
- Tubulin BindingTubulin Interaction involves temporary non-covalent binding through intermolecular physical forces of...
- Tulare-Buena Vista LakesThe drainage into the Tulare and Buena Vista Lake closed basins. California. Area = 16200 sq.mi.
- TumblingOperation in which castings, forgings, or parts pressed from metal powder are rotated in a barrel with...
- Tumbling or BurnishingProcess of polishing, deburring, removing sharp corners, and generally smoothing parts for both cosmetic and...
- Tumbling/Barrel Finishing/Mass Finishing/Vibratory FinishingPolishing or deburring a part using a rotating or vibrating container and abrasive media or other polishing...
- Tumbling-TileGrate tile hinged at one end and attached to a ram at the other end. When the ram extends, the grate tile...
- TumorAn abnormal, uncontrolled growth of cells. Synonym: neoplasm
- Tumor Cell InvasionThe local spread of tumor cells of a malignant neoplasm through infiltration or destruction of adjacent...
- Tumor Cell MobilityAny type of motility of a tumor cell that involves translocation of the cell, or cell body, from one site to...
- Tumor ExpansionGrowth of a tumor involving either an increase in size of a continuous tumor tissue mass or translocation of...
- Tumor InitiationThe first stage of tumor induction by a carcinogen, consisting of subtle alteration of cells by exposure to a...
- Tumor MarkerMolecular products metabolized and secreted by neoplastic tissue and characterized biochemically in cells or...
- Tumor ModelCells, tissues, or animals used to study the development and progression of cancer, and to test new...
- Tumor Necrosis Factor ReceptorMembers of the tumor necrosis factor receptor (TNFR) family play a key role in regulating the immune response...
- Tumor Necrosis Factor Receptor BindingA process that involves the binding of any member of the tumor necrosis factor family to a cognate receptor...
- Tumor OxygenationLevel of oxygen saturation within a tumor. Increase in the oxygenation of a tumor acts as a radiosensitizer.
- Tumor Progression1. Under the Armitage-Doll multistage theory of cancer development, the transition of a cell line between the...
- Tumor PromotionThe second step in two-stage carcinogenesis: the conversion of an initiated (premalignant) cell to malignancy.
- Tumor ReplacementThe process whereby normal tissue cells and structures are replaced by tumor cells.
- Tumor Suppressor Gene Inactivation ProcessAny DNA sequence alteration process occurring in a tumor suppressor gene, resulting in loss of function of...
- Tumor-Associated ProcessAn event, process, or condition that supports, or results from, tumor development.
- Tuna FishingCatching the tuna fish for commercial sale.
- Tundra1. A type of treeless ecosystem dominated by lichens, mosses, grasses, and woody plants. Tundra is found at...
- Tunicthe outer covering of a tunicate (Urochordata). The tunic is mostly composed of a protein and carbohydrates.
- Tunica IntimaThe inner most layer of the blood vessel wall. The consistency of the intima will vary depending on the type...
- Tunicate Body PartThe body parts of sea squirts, members of the phylum Urochordata
- Tuning Solution1. A solution which is used to determine acceptable instrument performance prior to calibration and sample...
- Tunnel KilnContinuous kiln that is not a roller kiln that is used to fire clay ceramics. In the clay ceramics source...
- Tunnel VentilationPlacement of large fans at end of building to draw air from one end to the other.
- TupleAn ordered list of objects, each of a specific type. The CERS uses valued pairs consisting of a parameter...
- TurbidHaving a cloudy or muddy appearance.
- Turbidimeter1. A device that measures the amount of suspended solids in a liquid.
- Turbidity1. The cloudy appearance of water caused by the presence of tiny particles. High levels of turbidity may...
- Turbidity FlowA flow of water down slope carrying a dense suspension of fluid mud or unconsolidated material.
- Turbidity MaximumRegion in an estuary where turbidity is high, due to concentration of particulates in the water column. This...
- TurbinateThe scroll-like bony plates with curved margins on the lateral wall of the nasal cavity. Turbinates, also...
- Turbine1. A motor activated by water, steam, or air to produce energy.
- Turbine AvailabilityMeasure of the ability of a wind turbine to make power, regardless of environmental conditions. Generally...
- Turbine MeterFlow meter in which a gas or liquid flow rate through the calibrated tube spins a turbine from which the spin...
- turbine wheel1. A rotor designed to convert fluid energy into rotational energy. Hydraulic turbines are used to extract...
- Turbofan EngineGas turbine engine designed to create its propulsion from exhaust gases and from air that bypasses the...
- Turbo-Fired BoilerPulverized coal, wall-fired boiler with burners arranged on walls so that the individual flames extend down...
- Turbojet EngineGas turbine engine that is designed to create all of its propulsion from exhaust gases.
- Turboprop EngineGas turbine engine that is designed to create most of its propulsion from a propeller driven by a turbine...
- Turboshaft EngineGas turbine engine that is designed to drive a rotor transmission system or a gas turbine engine not used for...
- Turbo/SuperchargerA means of increasing engine power output via precompression of intake air. Superchargers typically use a...
- TurbulenceA type of flow in which any particle may move in any direction with respect to any other particle and not in...
- Turbulent FlowA flow characterized by agitated and irregular, random-velocity fluctuations.
- turfA surface layer of earth containing a dense growth of grass and its matted roots; sod.
- TURNKEY SYSTEMIn electronic records, a computer system that is ready to run, typically with all necessary software already...
- Turnout1. A drainage ditch that drains water away from roads and road ditches. [EPA Guidance for Federal Land...
- turnoutsA drainage ditch that drains water away from roads and road ditches.
- Turpentine Recovery SystemAll equipment associated with recovering turpentine from digester system gases including condensers...
- Twenty-Foot Equivalent UnitA unit of measurement equal to the space occupied by a standard twenty-foot container. Used in stating the...
- Twisted PairThis is the term used to describe the traditional copper cable that is used for short distance communications.
- Two Stroke EngineA type of engine which completes the power cycle in single crankshaft revolution by combining the intake and...
- Two-Dimensional ModelA mathematical model defined along two spatial coordinates where the water quality constituents are...
- Two-Dimensional Monte Carlo AnalysisAn advanced modeling technique that uses two stages of random sampling, also called nested loops, to...
- Two-Photon Laser-Induced FluorescenceType of fluorescence induced by a beam of laser light in which two photons are simultaneous absorbed from the...
- Two-Piece Beverage CanTwo-piece draw and iron can manufactured to contain drinkable liquids such as beer, soft drinks, or fruit...
- Two-Piece CanAny beverage can that consists of a body manufactured from a single piece of steel or aluminum and a top...
- Two-Piece Food CanSteel or aluminum can manufactured by the draw and iron process and designed to contain edible products other...
- Two-Sided Confidence IntervalEstimated interval from the lower to upper confidence limit of an estimate of a parameter. This interval is...
- Two-Stage Filter SystemDry particulate filter system using two layers of filter media to remove particulate. The first stage is...
- Two-Stage Lime SofteningProcess in which chemical addition and hardness precipitation occur in each of two distinct unit...
- Two-Stage TopcoatTopcoat consisting of a pigmented basecoat and a transparent clearcoat.
- Two-Tone Frequency-Modulated SpectroscopyMethod of optical spectroscopy which employs two beams of different frequencies for improved sensitivity.
- TyloseMass of parenchyma cells appearing somewhat like froth in the pores of some hardwoods, notably the white oaks...
- Type Certificated Maximum Passenger Seating CapacityMaximum number of passenger seats that may be installed on an airplane as listed on its type certificate data...
- Type I Error1. Rejection of a true null hypothesis.
- Type I EtchantChemical milling etchant that contains varying amounts of dissolved sulfur and does not contain amines.
- Type I Sound Level Meter1. Sound level meter which meets the Type I requirements of American National Standard Specification...
- Type II Error1. Acceptance of a false null hypothesis.
- Type II EtchantChemical milling etchant that is a strong sodium hydroxide solution containing amines.
- Type of AnalysisAn attribute of a control strategy that specifies the type of algorithm used to match the control measures...
- Type of EvidenceA category of relationships that provides a logically distinct way to support, weaken, or refute the case for...
- Type of limitationDuration of the limitation monitoring period. ELG Database groups include monthly average, daily maximum...
- TypefaceA complete set of characters forming a family in a particular design or style.
- Types of ContaminantsIndividual contaminants are classified into contaminant groups based on their chemical structure and physical...
- Types of controlsType of institutional controls required indicates which category(ies) of institutional controls are required...
- Types of DocumentsDocuments maintained in EPA's on-line databases that if available, may provide further information for a site.
- Typhoid FeverAn acute systemic febrile infection caused by Salmonella typhi, a serotype of Salmonella enterica.
- TypicalIn a risk assessment, this describes the average person doing the types of things (indoors and outdoors) that...
- Typical BatchBatch process operated within a range of operating conditions that are documented in an operating scenario...
- Typical Meteorological YearA TMY is a data set of hourly values of solar radiation and meteorological elements for a one-year period...
- Typical PersonDescribes a hypothetical person living at the census-tract centroid (defined as a reference point that is...
- TypographyThe technique of arranging and emphasizing type, type design and modifying type symbols.
- TyrosineA non-essential amino acid. In animals it is synthesized from phenylalanine. It is also the precursor of...
1,357 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.