Environment terminology · MLC-0121

Environment terms: S (2,959)

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State Authorization SpecialistA state staff person on the regional codification team who provides support in obtaining background documents...
State Authorization Tracking System1. The State Authorization Tracking System (StATS) is an information management system designed to document...
State Certifying AuthorityFor water pollution control facilities, the State pollution control agency as defined in section 502 of the...
State Consent DecreeJudicial agreement between a state and the potentially responsible parties (PRPs) fully or partially settling...
State DeferralThe EPA region has entered into an agreement with a state to defer from listing on the National Priorities...
State Director1. Chief administrative officer of the lead state agency responsible for implementing the state permit...
State Emergency Response Commission1. The agency appointed by the Governor to oversee the administration of EPCRA at the state level. This...
State Enforcement Management AssistanceFederal compensation of state administrative costs for participation in enforcement planning or...
State Environmental Goals and Indication ProjectProgram to assist state environmental agencies by providing technical and financial assistance in the...
State Expenditure PlanPlan for expenditure of amounts disbursed under the Spill Impact Component that each Gulf Coast State must...
State (General)For state in the United States, see State (U.S. Specific)
State Implementation Plan1. A SIP is a detailed description of the programs a state will use to carry out its responsibilities under...
State Implementation PlansEPA approved state plans for the establishment, regulation, and enforcement of air pollution standards.
State Infrastructure Financing AuthorityState entity established or designated by the Governor of a State to receive a capitalization grant provided...
State IR CategoryLabel of Organization-specific Integrated Reporting categories as defined by the Organization's Domain...
State Land OwnershipA type of ownership pertaining to land belonging to one of the States, commonwealths, or territories of the...
State Lead AgencyState agency designated by the State to be responsible for registering pesticides to meet special local needs...
State Legislation ChecklistThis checklist was part of the Base Program authorization documents and was used to document state hazardous...
State LoansState Loans involve all disbursement of funds by the government to a state or local government (or Indian...
State Management PlanUnder FIFRA, a state management plan required by EPA to allow states, tribes, and U.S. territories the...
State Operating Permit ProgramOperating permit program that the Administrator has approved under part 70 of this chapter.
State or Local Air Monitoring StationState or local air monitoring stations. The SLAMS make up the ambient air quality monitoring sites that are...
State OrderAdministrative order signed by the state and the potentially responsible parties (PRPs). The order may be for...
State Plan1. Plan submitted pursuant to section 111(d) and section 129(b)(2) of the Clean Air Act and 40 CFR part 60...
State Plan Approval Effective DateEffective date that the EPA approves the State plan. The FEDERAL REGISTER specifies this date in the notice...
State Political Subdivision1. Municipality, city, town, borough, county, parish, district, association, or other public body (including...
State Primary Drinking Water Regulation1. A drinking water regulation of a State which is comparable to a national primary drinking water regulation.
State Program1. All the authorities, activities, and procedures that comprise the state's system of prior approval and...
State Program AdvisoryThe SPA is a guidance manual issued by EPA each year. It describes that documents have been developed for a...
State Program DirectorChief executive officer of the State sewage sludge management agency.
State program revision1. A change in an approved State primacy program.
State Registries of Hazardous Waste SitesRegistries established by state legislatures that contain information about properties. Types of registries...
State Regulated WatersThose waters of the United States in which the Corps suspends the issuance of section 404 permits upon...
State RegulationRegulation at the State or local level that requires a hospital to reduce the quantity of ethylene oxide...
State Response ActionState or Federal response action undertaken pursuant to applicable Federal or State environmental laws and...
State Revolving FundState loan funds for water utilities established under the Safe Drinking Water Act.
State Sewage Sludge Management AgencyAgency designated by the Governor as having the lead responsibility for managing or coordinating the approved...
State Speciation SiteSupplemental PM 2.5 speciation station that is not part of the speciation trends network.
State Support Agency Cooperative AgreementFederal compensation of state administrative costs of participation in site-specific remedial planning or...
State Trading Program BudgetTotal number of NOX tons apportioned to all NOX Budget units in a given State, in accordance with the NOX...
State Use RestrictionsStatutes enacted by some states providing authority to establish use restrictions specifically for...
State VariableThe dependent variables calculated within a model, which are also often the performance indicators of the...
State VariablesThe dependent variables calculated within the model, which are also often the performance indicators of the...
State Voluntary ProgramNon-mandatory collaboration sponsored by a state government to accomplish a goal
State Water Pollution Control AgencyState agency designated by the Governing Authority having responsibility for enforcing State laws relating to...
Stated Choice MethodStated preference model with survey-based methods that mimics a trade-off by giving the survey respondent a...
Stated PreferencePreferences revealed from surveys or otherwise asking people directly how much they prefer or value something.
Stated Preference MethodApproach to conducting surveys which employs the actual stated responses of participants about their...
State-designated Tribal Statistical AreasStatistical geographic areas identified and delineated for state recognized tribes by the Census Bureau that...
State/EPA Agreement1. Agreement between the Regional Administrator and the State which coordinates EPA and State activities...
Statement of BasisA document prepared for every draft NPDES permit for which a fact sheet is not required. A statement of basis...
Statement of WorkA written description of a contractual requirement for supplies or services. It delineates the tasks...
State-Only Universal Waste1. A term used in this Web site to indicate a waste that has been added to a state’s universal waste...
State-recognized American Indian ReservationsCensus Bureau-curated boundaries that depict reservations established by certain state governments for tribes...
States1. Scope Note: Select appropriate sub-topic. For content discussing the United States as a whole Use United...
Statewide Greenhouse Gas CapA statewide greenhouse gas (GHG) cap is a comprehensive, regulatory commitment to reduce statewide GHG...
Statewide Greenhouse Gas TargetA statewide greenhouse gas (GHG) target is a non-regulatory commitment to reduce statewide GHG emissions to a...
Static DilutionTechnique for preparing calibration mixtures in which standard and diluent gases are added to a fixed-volume...
Static Head1. When water is not moving, the vertical distance (in feet) from a specific point to the water surface is...
Static Loaded Radius ArcPortion of a circle whose center is the center of a standard tire-rim combination of an automobile and whose...
Static Pressure1. The static pressure in psi is the static head in feet times 0.433 psi/ft.
Static Sheen Test1. Standard test procedure that has been developed for this industrial subcategory for the purpose of...
Static StorageThe portion of the total storage of a reservoir that is continuously occupied and manifests a relatively...
Static System1. Test chamber in which the test solution is not renewed during the period of the test.
Static Water Depth1. The vertical distance in feet from the centerline of the pump discharge down to the surface level of the...
Static Water Level1. The elevation or level of the water table in a well when the pump is not operating.
StaticsTime shift corrections to individual traces to compensate for the effects of variations in elevation, surface...
StationThe recorded location where monitoring activities occur.
Station AliasUser-assigned alternative identifiers for stations in legacy STORET as captured in the Agency Station File...
Station DepthThe usual or typical depth of water at the station, measured in feet.
Station IDThe code used by the legacy system to denote the primary station identifier.
Station NameThe text that was originally used to describe the location. This field may contain the Major and Minor Basin...
Station Type Indicator DescriptionThe type of water the station tests (Surface Water, Ground Water, or Pipe Water).
Station WagonPassenger automobile with an extended roof line to increase cargo or passenger capacity, cargo compartment...
Stationary air monitorAn air sample monitor that is placed in a single, fixed location and is not moved during one or more sampling...
Stationary CastingPouring of molten metal into molds and allowing the metal to cool.
Stationary combustionBurning of fuels to generate electricity, steam, heat, or power in stationary equipment such as boilers...
Stationary Combustion SourceStationary fuel combustion sources are devices that combust any solid, liquid, or gaseous. fuel to produce...
Stationary Combustion Turbine1. All equipment, including but not limited to the turbine, the fuel, air, lubrication and exhaust gas...
Stationary CompactorPowered machine which is designed to compact solid waste or recyclable materials, and which remains...
Stationary EngineInclude all internal-combustion engines that are used either in a fixed application, or in a portable (or...
Stationary FrontA front between warm and cold air masses that is moving very slowly or not at all.
Stationary Gas Turbine1. A gas turbine is an internal combustion engine that operates with rotary rather than reciprocating motion...
stationary monitorPermanently positioned and continuously operating monitors that sample particulates in the air and obtain...
Stationary Pesticide ContainerRefillable container that is fixed at a single facility or establishment or, if not fixed, remains at the...
Stationary Reverberatory FurnaceFurnace, (isolating the fuel from contacting the processed material, but not from contacting the gases)...
Stationary Source1. A fixed-site producer of pollution, mainly power plants and other facilities using industrial combustion...
Stationary Source EmissionA place or object from which pollutants are released and which does not move around. Stationary sources...
Stationary SourcesSources of air emissions that do not move. Stationary sources include large industrial sources such as power...
Statistic1. A computed or estimated statistical quantity such as the mean, the standard deviation, or the correlation...
Statistical AnalysisAnalyzing collected data for the purposes of summarizing information to make it more usable and/or making...
Statistical ControlA statistical technique used to eliminate variance in dependent variables caused by extraneous sources. In...
Statistical control chartA graphical chart with statistical control limits and plotted values (for some applications in chronological...
Statistical control chart limitsThe limits on control charts that have been derived by statistical analysis and are used as criteria for...
Statistical CorrelationA statistical relationship between two or more variables such that systematic changes in the value of one...
Statistical Decision TheoryType of decision theory which assigns probabilities and values to various outcomes in an attempt to reach the...
Statistical DistributionA representation (usually a graph or plot) showing the likelihood that particular event will occur over a set...
Statistical InferenceGeneralizations developed from sample data, usually with calculated degrees of uncertainty.
Statistical Model1. Statistical formulations or analyses which, when applied to data and found to fit the data, are then used...
Statistical Model DevelopmentDevelopment of simple linear or multivariate regression models obtained by fitting observational data to a...
Statistical ModelsModels built using observations within a probabilistic framework. Include simple linear or multivariate...
Statistical ProcedureA set of standards and rules based in statistical theory by which one can describe and evaluate what has...
Statistical SampleSynonymous with probability sample; a group of cases selected from a population by a random process in which...
Statistical Significance1. The probability that a result is not likely to be due to chance alone. By convention, a difference between...
Statistical Significance TestTest of statistical significance provides statistical evidence that indicates whether an observed difference...
Statistical Sound LevelLevel in decibels that is exceeded in a stated percentage (x) of the duration of the measurement period. It...
Statistical TestType of statistical procedure that is applied to data to determine whether the results are statistically...
Statistical WeightingA technique used to assure representation of certain groups in the sample. Data for underrepresented cases...
Statistically Indeterminant ScreeningUse of the SI process to narrow the range of candidate causes and to guide future data collection, rather...
Statistically Significant EffectIn statistical analysis of data, a health effect that exhibits differences between a study population and a...
Statistically Significant IncreaseStatistically significant increase in a release is an increase in the quantity of the hazardous substance...
statistics1. A branch of mathematics that deals with collecting, reviewing, summarizing, and interpreting data or...
StatorThat portion of a machine which contains the stationary (non-moving) parts that surround the moving parts...
Status1. often seen as a "snapshot" of resource conditions, e.g., the number of stream kilometers in Region III...
StatutesA law passed by legislature
Statutory AuthorityResponsibility and authority assigned by law to a governmental organization.
Statutory CrosswalkAn organized approach for classifying each section/paragraph of state statutes so that the authorized program...
Statutory Economic Incentive ProgramAny EIP submitted to the EPA as an implementation plan revision to comply with sections 182(g)(3), 182(g)(5)...
Statutory Program Compliance MonitoringThere are 44 statutory programs for which EPA and its regulatory partners perform compliance monitoring...
Steady State InhibitionThe time point at which continued dosing at the same level results in no further increase in cholinesterase...
Steady State ModelA model providing the long-term or time-averaged behavior of the state variables.
Steady-stateA state or condition of a system or process that does not change in time.
Steady-State Conditions1. All variables (temperatures, pressures, volumes, flow rates, etc.) in a process do not vary significantly...
Steady-State Test1. Either discrete-mode tests or ramped-modal tests.
Steam CleaningRemoves residual dirt, oil, and grease from parts after processing though other unit operations. Typically...
Steam Generating Unit1. Device that combusts any fuel or byproduct/waste and produces steam or heats water or heats any heat...
Steam GeneratorUnit where a steam turbine is the prime mover and the steam is generated in a boiler by combusting fuel
Steam Jet EjectorSteam nozzle that discharges a high-velocity jet across a suction chamber that is connected to the equipment...
Steam LocomotiveHistoric locomotive propelled by a steam engine.
Steam OutputFor a boiler that produces steam for process or heating only (no power generation), the energy content in...
Steam Reforming1. Catalytic process that involves a reaction between natural gas or other light hydrocarbons and steam. The...
Steam Sales AgreementLegally binding agreement between a QF, IPP, new IPP, or firm associated with such facility and an industrial...
Steam Stripper SystemColumn (including associated stripper feed tanks, condensers, or heat exchangers) used to remove compounds...
Steam TurbineDevice that converts high-pressure steam, produced in a boiler, into mechanical energy that can then be used...
SteelAn iron-base alloy containing carbon, manganese, and often other alloying elements. Steel is defined here to...
Steel Basis MaterialCold rolled steel, hot rolled steel, and chrome, nickel and tin coated steel which are processed in coil...
Steel PicklingChemical removal of iron oxide mill scale that is formed on steel surfaces during hot rolling or hot forming...
Steel Pickling FacilityFacility that operates one or more batch or continuous steel pickling lines.
Steel ProductionRefining of iron ores and scrap into steel
Steel Production Cycle1. Operations conducted within the BOPF steelmaking facility that are required to produce each batch of...
Steel ScrapPre-consumer and post-consumer discarded steel that is processed by scrap providers for resale...
Steelmaking FacilityA plant which produces steel from iron ore and scrap.
Steep SlopeAny slope above twenty degrees or such lesser slope as may be defined by the regulatory authority after...
Steep-Slope RoofsSteep-slope roofs, or sloped roofs, are roof surfaces with a slope greater than 2 inches' "rise" for 12...
SteerBovine male castrated prior to puberty.
StemMain body of a tree from which branches grow.
Stem Cell1. A stem cell is a cell with the potential to form many of the different cell types found in the body. When...
Stem Cell DifferentiationDifferentiation of stem cells into specialized cells.
Stem DecaysDecay of wood in living and sometimes non-living trees often caused by fungi feeding on the xylem layer of...
Stem ElongationThe internodes of the stems of plants expand, causing the stems to increase in length
Stem RotSymptom of plant disease where the stem begins to decay.
Stem Rust of WheatThere are three rust diseases on wheat. Stem rust is caused by P. graminis f. sp. tritici. P. graminis f. sp...
Step 1 Complaint1. An enforcement proceeding begins when a Regional Office of EPA (and, on occasion, EPA headquarters) files...
Step 10 Initial DecisionIn the Initial Decision, the presiding ALJ sets forth his or her rulings on any factual issues disputed by...
Step 11 AppealA party who objects to a ruling or the recommended penalty contained in the Initial Decision may appeal it to...
Step 2 AnswerIf you, as the Respondent, dispute any of the violations alleged or the monetary penalty proposed in the...
Step 3 Alternative Dispute ResolutionThe first step taken by the Chief Judge is to send a letter to each party inviting the parties to participate...
Step 4 Assignment of ALJ for LitigationIf the parties decline to participate in ADR or fail to reach a settlement prior to the termination of ADR...
Step 5 Prehearing Information ExchangeShortly after the Chief Judge designates an ALJ to preside over the litigation of the case, the ALJ issues a...
Step 6 Order Scheduling HearingShortly after the parties file and serve their Prehearing Exchanges, the presiding ALJ issues an “Order...
Step 7 Prehearing ConferenceCommonly, about a month prior to the hearing, the presiding ALJ or one of his or her staff attorneys conducts...
Step 8 Evidentiary HearingAs noted above, an administrative hearing is the equivalent of a trial in federal court in that it is a...
Step 9 Post-Hearing BriefsThe Regional Hearing Clerk subsequently notifies the parties of the availability of the transcript and...
STEP-AND-REPEAT CAMERAA microfilm camera that exposes a series of separate images on an area of film according to a set format...
Step-Reaction PolymerizationThe polymerization reactions take place between two kinds of molecules
Step-Up ParlorCows step onto raised platforms for milking. The milking units are attached from the side.
StereoisomerismThe phenomenon whereby compounds whose molecules have the same number and kind of atoms and the same atomic...
SterilantSubstance, or mixture of substances, that destroys or eliminates all forms of microbial life in the inanimate...
SterileClean, free of any living organisms. Also means unable to reproduce.
Sterilization1. (STARE-uh-luh-ZAY-shun) The removal or destruction of all microorganisms, including pathogenic and other...
Sterilization ChamberAny enclosed vessel or room that is filled with ethylene oxide gas, or an ethylene oxide/inert gas mixture...
Sterilization FacilityGroup of ethylene oxide sterilization units at a hospital using ethylene oxide gas or an ethylene oxide/inert...
Sterilization ProcessAny time when ethylene oxide is removed from the sterilization unit or combination sterilization unit through...
Sterilization UnitAny enclosed vessel that is filled with ethylene oxide gas or an ethylene oxide/inert gas mixture for the...
Sterilizer1. One of three groups of anti-microbials registered by EPA for public health uses. EPA considers an...
Sterndrive Engine1. Four stroke marine SI engine that is designed such that the drive unit is external to the hull of the...
SternumA long, narrow, and flat bone commonly known as breastbone occurring in the midsection of the anterior...
Steroid Hormone MetabolismTthe buildup and breakdown of steroid hormones for utilization by the organism.
Steroid HormonesHormones possessing the steroid ring system; e.g., androgens, estrogens, adrenocortical hormones.
Steroid Metabolic ProcessSteroid Metabolism consists of diverse biochemical reactions that convert steroid compounds, lipids...
Steroid ReceptorProteins found usually in the cytoplasm or nucleus that specifically bind steroid hormones and trigger...
SteroidsA group of polycyclic compounds closely related biochemically to terpenes. They include cholesterol, numerous...
SterolsSteroids with a hydroxyl group at C-3 and most of the skeleton of cholestane. Additional carbon atoms may be...
StethoscopeAn instrument used to magnify sounds and convey them to the ear.
StevedoresLabor management companies that provide equipment and hire workers to transfer cargo between ships and docks...
StewardPerson responsible for entering and maintaining the metadata for a resource.
sticky limitThe limit at which a soil loses its ability to adhere to a metal blade.
STICSORD's Scientific and Technical Information Clearance System for its research products.
StigmaThe receptive part of the pistil on which the pollen germinates.
Still1. Device used to volatilize, separate, and recover petroleum solvent from contaminated solvent, together...
Still gas1. Any form or mixture of gases produced in refineries by distillation, cracking, reforming, and other...
Stilling BasinBasin constructed to dissipate the energy of fast-flowing water (e.g., from a spillway or bottom outlet), and...
Stilling WellAn enclosure mounted inside a reservoir, channel, or natural water body so as to intersect the free water...
Stimulated Emission Depletion MicroscopyTechnique of fluorescence microscopy used to form high-resolution images by de-activating the fluorescence of...
Stimulus ResponseReaction of an animal to an environmental change
Sting ApparatusParts of the body used for the administration of venom.
StingingProcess of some invertebrates, such as bees and spiders and cnidarians, to deliver venom.
StipendSupplemental financial assistance, other than tuition and fees, paid directly to the trainee by the recipient...
StochasticBased on the assumption that the actions of a chemical substance results from probabilistic events.
Stochastic Compartmental ModelUseful to predict potential outcomes of various disease transmission scenarios.
Stochastic Mathematical ModelA mathematical model designed to produce a series of random responses (e.g., runoff) that have the...
Stochastic Model1. A model that includes variability (see definition) in model parameters. This variability is a function of...
Stochastic Process Analysis(Analysis of) a process involving random variables, and characterized by variability in space or time.
stochastic uncertainty1. Refers to the model parameters and can be measured and expressed by confidence intervals.
StochasticityFluctuations in ecological processes that are due to natural variability and inherent randomness.
Stock1. a term for unprinted paper.
Stock artRoyalty-free photos that can be purchased for use in a publication.
Stock BariteBarite that was used to formulate a drilling fluid. [40 CFR 435.11 (CFR 2013)]
Stock Base FluidBarite that was used to formulate a drilling fluid. [40 CFR 435.11 (CFR 2013)]
STOCK COPYAn extra copy of printed records or of other published materials. See also COPY (1).
STOCK FOOTAGEUnedited motion picture film or videotape of scenery and action that is retained for future use.
Stock PollutantA pollutant for which the environment has little or no absorptive capacity, such as non-biodegradable...
Stock pollutantsA pollutant for which the environment has little or no absorptive capacity, such as non-biodegradable...
Stock Solution1. A solution containing an analyte that is prepared using a reference material traceable to EPA, the...
Stock Standard Solution1. A concentrated standard solution that is prepared in the laboratory using assayed reference materials or...
Stock Standard Suspension1. A concentrated suspension containing the analyte prepared in the laboratory using assayed reference...
StockerWeaned cattle that are fed high-roughage diets (including grazing) before going into the feedlot.
StockingAdding fish to a body of water, such as a lake, pond or stream.
Stocking RateNumber of human food chain organisms (or pounds of human food chain organisms) per unit time introduced into...
Stock-on-HandProducts which are in the possession, direction, or control of a person and are intended for distribution in...
StockpilingManufacturing or purchasing composite wood products, whether in the form of panels or incorporated into...
Stoichiometric RatioMass-balance-based ratio for nutrients, organic carbon and algae (e.g., nitrogen-to-carbon ratio).
StokerUnit consisting of a mechanically operated fuel feeding mechanism, a stationary or moving grate to support...
Stoker BoilerBoiler that burns solid fuel in a bed, on a stationary or moving grate, that is located at the bottom of the...
Stoker Refuse-Derived Fuel CombustorSteam generating unit that combusts refuse-derived fuel in a semi-suspension combusting mode, using air-fed...
Stomach1. An organ located under the diaphragm, between the liver and the spleen as well as between the esophagus...
Stomach DisordersA non-neoplastic or neoplastic disorder that affects the stomach. Representative examples of non-neoplastic...
Stomatal ConductanceThe rate of gas exchange (carbon dioxide uptake and water loss) through the stomata of a leaf.
Stomatal MovementThe opening and closing of plant stomata by the guard cells surrounding it, regulating water loss.
Stone1. A mineral or group of consolidated minerals either in mass or in a fragment of pebble or larger size...
Stone FeedLimestone feedstock and millscale or other iron oxide additives that become part of the product.
StopeA step-like excavation underground for the removal of ore. It is formed as the ore is mined in successive...
Storage1. Temporary holding of waste pending treatment or disposal, as in containers, tanks, waste piles, and...
Storage and Retrieval of Water-Related DataSee the Purpose Page (http://www.epa.gov/storpubl/legacy/purpose.htm) for more information.
Storage Basin1. A reservoir intended to hold stormwater, combined, sanitary, or industrial wastewater when temporary...
Storage BatteryA battery which converts chemical energy into electrical energy and which may be recharged by carrying out...
Storage Bin1. Facility for storage (including surge bins and hoppers) of metallic minerals prior to further processing...
Storage capacity1. The volume of a tank or container, for purposes of determining the applicability of 40 CFR Part 112, means...
Storage ContainerVessels or tanks, including mix equipment, used to hold finishing, gluing, cleaning, or washoff materials.
Storage FacilitySite or physical structure used to keep goods or materials for the long term. This term does not necessarily...
Storage Facility ComponentPart of a storage facility.
Storage OperationTransfer of produced oil and produced water to storage tanks, the filling of the storage tanks, the storage...
Storage PondAn earthen basin designed to store manure and wastewater until it can be utilized. Storage ponds are not...
Storage ProhibitionLDR provision that prevents the indefinite storage of untreated hazardous waste for reasons other than the...
Storage ProteinSource of amino acids and reserves of metal ions, commonly found in seeds.
Storage Tank1. A reservoir intended to hold stormwater, combined, sanitary, or industrial wastewater when temporary...
Storage Vessel1. Tank or other vessel that is used to store liquids that contain one or more organic HAP. Storage vessels...
Storage Vessel Facility Removed from Service1. Storage vessel affected facility has been physically isolated and disconnected from the process for a...
Storage Vessel Facility Returned to ServiceStorage vessel affected facility that was removed from service has been: (1) Reconnected to the original...
Storage Vessel in Chloroprene ServiceStorage vessels of any capacity and vapor pressure in a process at affected sources producing neoprene...
Storage Vessel Reference Control Technology1. Either:(1) For Group 1 storage vessels complying with § 63.660:(i) An internal floating roof, including an...
Storage Vessel with Flash Emission PotentialAny storage vessel that contains a hydrocarbon liquid with a stock tank GOR equal to or greater than 0.31...
StoreTo put and keep data in an information system.
Store DateThe date the data was entered into the STORET system.
Stored CornHarvested corn that is kept on the farm for a time before processing it for sale.
STORET1. U.S. Environmental Protection Agency (EPA) national water quality database for STORage and RETrieval...
STORET Legacy Data CenterAn interim relational database that houses data migrated from the Legacy STORET system. See the Purpose Page...
StormAny disturbed state of the atmosphere, especially affecting the Earth's surface, and strongly implying...
Storm ExemptionApplies to this subpart M only. If, as a result of precipitation (rainfall or snowmelt), a source subject to...
storm return periodThe recurrence interval or an estimate of the interval of time between storms of a certain intensity or size...
Storm Runoff1. Storm water runoff, snowmelt runoff, and surface runoff and drainage; rainfall that does not evaporate or...
Storm Sewer1. A sewer that collects and transports surface runoff to a discharge point (infiltration basin, receiving...
Storm Surge1. An abnormal rise in sea level accompanying a hurricane or other intense storm, whose height is the...
Storm Surge MitigationMitigation mechanisms include building and construction codes, floodplain management plans, land use plans...
Storm Water1. Stormwater runoff, snow melt runoff, and surface runoff and drainage; rainfall that does not infiltrate...
Storm Water Drainage WellsShallow Class V wells that are designed for the disposal of rain water and melted snow. These wells typically...
Storm Water TreatmentTechnology used to treat stormwater runoff from urbanized or otherwise highly impervious catchment areas...
stormflowThe portion of streamflow attributable to precipitation that enters the channel (generally as overland flow...
Storm-Sewer DischargeFlow from a storm sewer that is discharged into a receiving water or to a sewer system.
Stormwater1. Refers to rainwater as well as water from washing cars, overwatering lawns, and other sources. Stromwater...
Stormwater CisternLarge storage devices that are often built below ground, at ground level, or on rooftops, for storing...
Stormwater Control SystemStructural system that manages runoff.
Stormwater Detention BasinA waterbody designed to detain stormwater runoff and reduce flooding.
Stormwater Discharge-Related ActivitiesActivities that cause, contribute to, or result in stormwater point source pollutant discharges, including...
Stormwater FeatureUse rainwater and stormwater as their sole source and function as stormwater management elements. Examples...
Stormwater InfiltrationThe process through which stormwater runoff penetrates into soil from the ground surface.
Stormwater ManagementStormwater runoff is generated when precipitation from rain and snowmelt events flows over land or impervious...
Stormwater Management Plan1. A plan that describes how runoff from precipitation events and related water quality issues will be...
Stormwater PlanterSmall, contained vegetated area that is used to collect and treat stormwater through the mechanisms provided...
Stormwater PollutantAdversely impact receiving waters and include, but are not limited to: Landscape chemicals - pesticides...
Stormwater Post Construction ControlA practice that is installed and maintained to control post construction stormwater discharges.
Stormwater Sewer SystemDrain and collection system designed and operated for the sole purpose of collecting stormwater and which is...
Stove-Pipe ResearchResearch conducted within the boundaries of a single-discipline
Strahler OrderHierarchical ordering of streams based on the degree of branching. A first-order stream is an unforked or...
Straight Chain Lepidopteran PheromoneSCLPs are naturally occurring, or if synthesized, structurally and functionally identical to naturally...
Straight Gate FurnaceType of indurating furnace,
Straight Kraft Recovery FurnaceFurnace used to recover chemicals consisting primarily of sodium and sulfur compounds by burning black liquor...
strainA variant of a species of bacteria. Some may be pathogenic and some may be benign. For example, most E. coli...
StramenopilesA common name (but used formally) for a group of organisms that are mostly kinds of algae including...
StrandLong (with respect to thickness and width), flat wood piece specially cut from a log for use in oriented...
StranglesIn horses, an upper respiratory infection caused by bacteria
Strategic EvaluationAn evaluation used by managers as an aid to decide which strategy a program should adopt in order to...
Strategic PlanThe process of comprehensive, integrative program planning that considers, at a minimum, the future of...
Strategic PlanningStrategic Planning entails the determination of annual and long-term goals and the identification of the best...
Strategic RiskRisk that affects an entity’s vital interests or execution of chosen strategy, whether imposed by external...
StrategyThe general plan or direction selected to accomplish incident objectives.
Strategy County SummaryA dataset output from a control strategy that is a table of emission reduction and cost values aggregated by...
Strategy Detailed ResultA dataset output from a control strategy that contains a table of emission source-control measure pairings...
Strategy Measure SummaryA dataset output from a control strategy that is a table of emission reduction and cost values aggregated by...
Stratification1. Layering or bedding of geologic materials (e.g., rock, sediments).
Stratification ( of Waterbody)Formation of water layers each with specific physical, chemical, and biological characteristics. As the...
Stratified Charge EngineAn internal combustion engine using fuel injection with charge stratification. It combines features of...
Stratified Random SamplingA sampling procedure for which the population is first divided into strata or subgroups based on designated...
Stratified Sampling1. Sampling of distinct homogeneous subpopulations in the overall population. Every overall population point...
Stratigraphy1. Stratigraphy is the study of the formation, composition, and sequence of sediments, whether consolidated...
StratocumulusLow-level clouds, existing in a relatively flat layer but having individual elements. Elements often are...
Stratocumulus ConvectionVertical transport of heat, moisture and momentum where the cloud layer consists of stratocumulus clouds..
StratopauseBoundary between the stratosphere and the mesosphere.
Stratosphere1. The region of the atmosphere above the troposphere. The stratosphere extends from about 10km to about 50km...
Stratosphere AerosolParticulate matter in the stratosphere existing as an aerosol
Stratosphere ConstituentGases, particles, ions, vapors, and aerosols in the earth's stratosphere.
Stratospheric OzoneIn the stratosphere. ozone has beneficial properties where it forms an ozone shield that prevents dangerous...
Stratospheric Ozone (O3) ProfileCan be illustrated in a series of graph which measure: a) O3 molecular density [molecules per cubic meter] as...
Stratum1. Geologic term for a sedimentary rock bed.
Stratum (Strata)A sampling structure that restricts sample randomization/selection to a subset of the frame. Inclusion...
StratusA low, generally gray cloud layer with a fairly uniform base. Stratus may appear in the form of ragged...
Strawberry ProcessingProcessing of strawberries into the following product styles: Canned and frozen, whole, sliced, and pureed.
Stray AnimalDomestic animals that have gotten away from their owners and are lost and without human care.
Streak canalSmall canal located in the end of each teat, through which the milk passes immediately prior to expulsion...
Stream1. A general term for a body of flowing water; natural water course containing water at least part of the...
Stream Bank1. The margins of a channel. Banks are called right or left as viewed facing in the direction of the flow.
Stream bank erosionLoss of sediment along a stream bank as a result of increased runoff from nearby development. Stream bank...
Stream Bed1. The unvegetated portion of a channel boundary below the baseflow level.
Stream BurialRouting above-ground streams into underground pipes. Dark, wet and ever-flowing, but rarely seen. They are...
Stream CaptureA process of erosion where one stream erodes headward, diverting some of another stream's drainage into its...
Stream Channel1. In hydrologic terms, also known as Watercourse; an open conduit either naturally or artificially created...
Stream Channelization1. River and stream channel engineering undertaken for the purpose of flood control, navigation, drainage...
Stream ContaminationIntroduction into water of microorganisms, chemicals, toxic substances, wastes, or wastewater in a...
Stream CorridorThe area that consists of the stream channel itself, the floodplain, and a transitional zone between the...
Stream CurrentSegment of a stream, river, or other waterbody that moves with a velocity much greater than the average of...
Stream Design FlowStream flow that represents critical conditions, upstream from the source, for protection of aquatic life...
Stream GageAn instrument to measure the volume of streamflow over time, generally reported in cubic feet per second...
stream geometryThe physical form assumed by a stream system that includes channel depth, width, longitudinal slope, and...
stream morphologyThe science of analyzing the structural makeup of rivers and streams and how they change over time.
Stream Order1. A stream classification system in which the headwater channel is of order 1, and when two channels of the...
Stream pathThe course taken by a chemical release from its release point (an effluent pipe from a facility or POTW) to...
Stream Reach1. A continuous portion of a stream between two designated points.
Stream RestorationVarious techniques used to replicate the hydrological, morphological, and ecological features that have been...
Stream Restoration TechniqueVarious techniques used to replicate the hydrological, morphological, and ecological features that have been...
Stream-Aquifer InteractionRelations of water flow and chemistry between streams and aquifers that are hydraulically connected.
Streambed1. The channel through which a natural stream or river runs or once ran through.
Streambed sedimentsFine sediments and silt on the streambed. In excess quantities, they can fill in the habitat spaces between...
Streamflow1. Discharge that occurs in a natural channel. Although the term "discharge" can be applied to the flow of a...
Streaming potentialA voltage resulting from flow of an ionic fluid.
Streamlining1. In some cases, more than one emissions standard will apply to an emissions unit, e.g., a unit could be...
Streams1. A general term for a body of flowing water; natural water course containing water at least part of the...
Streamside Management Area1. A designated area that consists of the stream itself and an adjacent area of varying width where...
Street DrugDrugs obtained and often manufactured illegally for the subjective effects they are said to produce. They are...
Street Motorcycle1. Any motorcycle that:(A) With an 80 kg (176 lb) driver, is capable of achieving a maximum speed of at least...
Street NetworkThe patterns formed by roadways and the extent to which they are connected to each other.
street sweepingThe use of self-propelled and walk-behind sweeping and vacuum equipment to remove sediment and other debris...
Street TreeA tree planted along a street to provide shade or for ornamental purposes.
Street WasteMaterials picked up by manual or mechanical sweepings of alleys, streets, and sidewalks; wastes from public...
Streeter-Phelps EquationClosed-form analytical mathematical solution for steady-state calculation of a dissolved oxygen in...
StrengthA term used to describe the overall defensibility of the evaluation as assessed by use of scientific...
Strength-of-Evidence Analysis1. A structured inferential process that uses multiple lines of evidence to identify the most likely cause or...
StreptococcusA genus of gram-positive, coccoid bacteria whose organisms occur in pairs or chains. No endospores are...
StreptomycesA genus of bacteria that form a nonfragmented aerial mycelium. Many species have been identified with some...
Streptomyces griseuspesticide [Original source...
Streptomyces lydicus WYEC 108pesticide [Original source...
stressImpacts that are damaging or have the potential for damaging an ecosystem component or natural process.
Stress RegimeThe term "stress regime" has been used in at least three distinct ways: (1) to characterize exposure to...
Stress Response SignalingAny intracellular process that involves a chemical or mechanical stimulus and results in a cellular response...
Stress TestingThis ensures that the maximum load (e.g., real-time data acquisition and control systems) does not exceed...
Stressed WatersThose ocean waters for which an applicant can demonstrate to the satisfaction of the Administrator, that the...
Stressor1. Any physical, chemical, or biological entity that can induce an adverse response.
Stressor Identification1. A methodology for determining the most probable cause of an observed biological impairment, using...
Stressor indicatorA characteristic of the environment that is suspected to elicit a change in the state of an ecological...
Stressor-Response1. The relationship between the intensity, frequency, or duration of exposure to a stressor and the intensity...
stressor-response functionAn empirical or model-based description of the relationship between the strength, magnitude or other quantity...
Stressor-Response ModelA model of that relationship. Equivalent to exposure-response and concentration-response.
Stressor-Response Profile1. The product of characterization of ecological effects in the analysis phase of ecological risk assessment...
Stressors1. physical and biological factors that adversely affect aquatic organisms.
strict, joint and several liabilityThe liability scheme imposed by CERCLA.
strict liabilityThe assessment of liability for damages without requiring proof of negligence.
StridulationSound communication by insects produced by the friction of rigid body parts (e.g., legs, wings).
Striga asiaticaParasitic plant that attacks agricultural crops, including corn, sorghum, sugar cane, and rice (Werth et al...
Strike-Slip FaultStrike-slip faults are vertical (or nearly vertical) fractures where the blocks have mostly moved...
Strip CroppingA crop production system that involves planting alternating strips of row crops and close-growing forage...
Strip CupA small cup or device to collect forestrippings and which makes abnormal milk easier to observe.
Strip MineA surface mine where the surface overburden is removed to expose the mineral, generally a coal seam.
Strip miningCutting deep trenches to remove minerals such as coal and phosphate found near the earth's surface in flat or...
Strip, Sheet, and Miscellaneous ProductSteel products other than wire products and fasteners.
Strip, Sheet and PlateAcid pickling operations that pickle strip, sheet or plate products.
Strip TillageThe process in which only a narrow strip of land needed for the crop row is tilled.
Strippable CoatingCoating that can be applied to a substrate for temporary protection of the underlying substance and can be...
Strippable Spray Booth MaterialCoating that:(1) Is applied to a spray booth wall to provide a protective film to receive over spray during...
Stripped ResinMaterial exiting the resin stripper that contains polymerized vinyl chloride.
Stripper1. Any vessel in which residual vinyl chloride is removed from polyvinyl chloride resin, except bulk resin...
StrippingThe removal of substances with equilibrium vapor pressures at ambient temperatures.
Stripping (Polymer Production)Removal of organic compounds from a raw elastomer product. In the production of an elastomer, stripping is a...
Strong Chelating AgentAll compounds which, by virtue of their chemical structure and amount present, form soluble metal complexes...
Strong Hybrid Electric VehicleHybrid electric vehicle that has start/ stop capability and regenerative braking capability, where the...
Strong Liquor Storage TankAll storage tanks containing liquor that has been concentrated in preparation for combustion or oxidation in...
Strong Nuclear ForceA powerful force between nucleons; proton-to-proton, neutron-to-neutron, and proton-neutron. It acts over a...
Structural Autoclavable AdhesiveAdhesive used to bond load-carrying aerospace components that is cured by heat and pressure in an autoclave.
Structural BasinA structural basin is a large-scale structural formation of strata formed by tectonic down warping...
Structural Composite Preformed Polyurethane FoamFoam blown from polyurethane that is reinforced with fibers and with polymer resin during the blowing...
Structural ControlA practice that involves design and construction of a facility to mitigate the adverse impact of urban...
Structural DeformationDistortion in walls of a tank after liquid has been added or removed.
Structural Equation Modeling1. A family of multivariate statistical methods that use covariance analysis to estimate parameters...
Structural FiberboardFibrous-felted, homogenous panel made from lignocellulosic fibers (usually wood, cane, or paper) and having a...
Structural FoamA foamed core surrounded by a solid outer skin.
Structural IsomerismWhere chemical compounds have the same composition, but the atoms are bound together in a different order.
Structural Nonautoclavable AdhesiveAdhesive cured under ambient conditions that is used to bond load-carrying aerospace components or for other...
Structural practiceA practice, such as a stormwater basin or streambank fence, that requires construction, installation, and...
Structural ProtectionPrevention of termite or other wood-destroying pest activity in an entire structure as the result of an...
Structural ProteinProtein whose major function is to give shape and support to tissues, cells, and subcellular structures.
Structural Waterproof AdhesiveAdhesive whose bond lines are resistant to conditions of continuous immersion in fresh or salt water, and...
Structurally Insulated PanelPrefabricated insulated structural element for use in home walls, ceilings, floors, and roofs, which provide...
Structurally insulated panelsPrefabricated insulated structural elements for use in home walls, ceilings, floors, and roofs, which provide...
Structurally Integrated Nylon Fuel Tank1. Fuel tank having all the following characteristics:(1) The fuel tank is made of a polyamide material that...
StructureBuilding or vessel which effectively surrounds and encloses the microorganism and includes features designed...
Structure Data FormatSDF stands for Structure Data Format, a standardized textual data file format developed by MDL, Inc. that is...
Structured InterviewAn interview in which questions to be asked, their sequence, and detailed information to be gathered are all...
Structured SynthesisFormalized, systematic method of aggregating information into a coherent corpus.
StructuresA single fiber, fiber bundle, cluster, or matrix.
Struvite Formation1. The common name for magnesium ammonium phosphate hexahydrate (MgNH4PO4 · 6(H2O)). Struvite can naturally...
Strychnine and Salts (1.0)Includes any unique chemical substance that contains strychnine or a strychnine salt as part of that...
Stubble MulchA protective cover provided by leaving plant residues of any previous crop as a mulch on the soil surface...
StuccoFinish applied wet to walls, which is a mixture of cement, sand, and hydrated lime in water.
StudentPerson who has gained admission.
StudentsA full- or part-time attendee of an educational institution or day care that is served by a well located...
Study1. Any experiment at one of more test sites, in which a test substance is studied in a test system under...
Study and Remedy SelectionA number of studies are undertaken at a site to determine site conditions, the nature and extent of...
Study Completion DateDate the final report is signed by the study director. [40 CFR 79.63 (CFR 2013)][40 CFR 160.3 (CFR 2013)]
Study CopyWritten presentation of the purpose and methodology of a study and its results.
Study DirectorIndividual responsible for the overall conduct of a study. [40 CFR 792.3 (CFR 2013)][40 CFR 160.3 (CFR 2013)]
Study Initiation DateDate the protocol is signed by the study director.[40 CFR 79.63 (CFR 2013)][40 CFR 792.3 (CFR 2013)]
Stuffing Box PressureFluid (liquid or gas) pressure inside the casing or housing of a piece of equipment, on the process side of...
StullTimber used to support loose rocks or slabs. It may also be used to support a platform in a working area.
StyleThe contracted portion of the pistil between the ovary and the stigma.
Style SheetA set of specifications that define the layout and/or manner in which information in a document is presented...
Styrene Acrylonitrile ResinCopolymers consisting primarily of styrene and acrylonitrile monomer units.
Styrene Butadiene LatexPolymer consisting primarily of styrene and butadiene monomer units produced using an emulsion process and...
Styrene Butadiene Rubber by EmulsionPolymer consisting primarily of styrene and butadiene monomer units produced using an emulsion process...
Styrene Butadiene Rubber by SolutionPolymer that consists primarily of styrene and butadiene monomer units and is produced using a solution...
Sub Basin CodeCode representing the user defined sub basin developed as a part of a drainage area delineation scheme.
Subacute Inhalation ToxicityAdverse effects occurring as a result of the repeated daily exposure of experimental animals to a chemical by...
Sub-AgencyFederal rulemaking entity that exists within a department or agency.
SubaqueousExisting, formed, or taking place in or under water.
SUBAWARDAn award of financial assistance in the form of money, or property in lieu of money, made under an award by a...
SubawardeeA non-Federal entity that receives a subaward from a pass-through entity to carry out part of a Federal...
SubawardsAn award provided by a pass-through entity to a subrecipient for the subrecipient to carry out part of a...
Sub-BasinA watershed that is subset of a larger watershed.
Sub-Basin CategoryFor onshore natural gas production, means a subdivision of a basin into the unique combination of wells with...
Sub-Basin Pressure GroupAs applicable to each sub-basin are defined as follows: Less than or equal to 25 psig; greater than 25 psig...
Subbituminous coal1. A dull, black coal of rank intermediate between lignite and bituminous coal.
SubcategoryPoint source categories may be divided into subcategories based on age of the equipment and plants, process...
Subcellular FractionationSeparation technique which disrupts the delicate anatomy of a cell but preserves the structure and physiology...
Subcellular ProcessAn intracellular or extracellular function, activity, or process principally involving intracellular or...
Subchronic1. Of intermediate duration, usually used to describe studies or levels of exposure between 5 and 90 days.
Subchronic Dermal ToxicityAdverse effects occurring as a result of the repeated daily exposure of experimental animals to a chemical by...
Subchronic EffectAdverse effect, measured by assessing an acceptable endpoint, resulting from continual exposure for a period...
Subchronic Exposure1. Repeated exposure by the oral, dermal, or inhalation route for more than 30 days, up to approximately 10%...
Subchronic Inhalation StudyRepeated exposure by inhalation for part (approximately 10 percent) of a life span of the exposed test animal.
Subchronic Inhalation ToxicityAdverse effects occurring as a result of the repeated daily exposure of experimental animals to a chemical by...
Subchronic Oral ToxicityAdverse effects occurring as a result of the repeated daily exposure of experimental animals to a chemical by...
Subchronic Reference ConcentrationAn estimate (with uncertainty spanning perhaps an order of magnitude) of a continuous inhalation exposure for...
Subchronic Reference DoseAn estimate (with uncertainty spanning perhaps an order of magnitude) of a daily oral exposure for a...
Subchronic Study1. A toxicity study designed to measure effects from subchronic exposure to a chemical.
Subchronic ToxicityAdverse effects occurring as a result of the repeated daily exposure of experimental animals to a chemical...
Subclass IA subdivision of a class, located within the second level of the hierarchical structure of a classification...
Subclass IIA subdivision of a subclass I, located within the third level of the hierarchical structure of a...
SubclinicalA disease condition without symptoms but often resulting in decreased production or impaired milk quality.
Subclinical Infections1. Infection associated with no detectable symptoms, but caused by microorganisms capable of producing easily...
SubcutaneousUnder the skin.
SubductionProcess of one crustal plate sliding down and below another crustal plate as the two converge. The subduction...
SuberinA lipidic polyester present in suberized plant cell walls that develop in the outer tissues of plants, where...
SubfamilySubset of a vehicle family including vehicles subject to the same FEL(s).
SUBGRANTAn award of financial assistance in the form of money, or property in lieu of money, made under a grant by a...
SUBGRANTEEThe government or other legal entity to which a subgrant is awarded and which is accountable to the grantee...
SubgrantsAn award provided by a pass-through entity to a subrecipient for the subrecipient to carry out part of a...
subirrigationApplication of irrigation water below the ground surface by raising the water table to within or near the...
Sub-Irrigation InfrastructureInfrastructure to support water distribution across land by raising the water table, through a system of...
SUBJECT CLASSIFICATION SYSTEMA plan used for identifying and coding documents by topic to provide an orderly and accurate way of filing...
Subject Matter Expert1. Individual with in-depth knowledge in a specific area or field
Subject Matter ExpertsAn individual who exhibits the highest level of expertise in a specified topic or field of work.
SUBJECT OUTLINEIn files management, a list of topics arranged hierarchically (i.e., by primary, secondary, tertiary, and...
Subject to RegulationFor any air pollutant, that the pollutant is subject to either a provision in the Clean Air Act, or a...
SUBJECT-NUMERIC FILING SYSTEMA subject classification system in which the main topics are arranged alphabetically and the subdivisions are...
Subject's Legally Authorized Representative1. Individual or judicial or other body authorized under applicable law to consent on behalf of a prospective...
SublethalBelow the concentration that directly causes death. Exposure to sublethal concentrations of a substance can...
Sublimation1. The change from solid phase directly to gas phase without passing through a liquid phase. For example, an...
Submarine BilgewaterSources of bilgewater include seawater accumulation, normal leakage from machinery, and fresh water washdowns...
Submarine CanyonA general term for all linear, steep-sided valleys on the seafloor. These canyons can be associated with...
Sub-Membrane Depressurization1. A system designed to achieve lower sub-membrane air pressure relative to crawlspace air pressure by use of...
Sub-Membrane Depressurization SystemA system designed to achieve lower sub-membrane air pressure relative to crawlspace air pressure by use of a...
Submerged Aquatic Vegetation1. Aquatic vegetation, such as sea grasses, that cannot withstand excessive drying and therefore live with...
Submerged Aquatic Vegetation HabitatVascular plants that grow below the surface of the water on soft sediments in sheltered shallow waters of...
Submerged Arc FurnaceAny furnace wherein electrical energy is converted to heat energy by transmission of current between...
Submerged Filling1. Filling of a gasoline cargo tank or a stationary storage tank through a submerged fill pipe whose...
Submerged Standard Industrial FermentationFermentation system that meets all of the following conditions:(1) Enzyme production is conducted under...
Submergence1. The distance between the water surface and the media surface in a filter.
SubmergentAquatic plants that live and grow entirely below the water surface.
Submergent CoastA coast in which formerly dry land has been recently drowned, either by land subsidence or a rise in sea...
Sub-Mesoscale EddyA reverse current with rotational movement created when fluid flows past an obstacle. Sub-mesoscale eddies...
SubmeteringMetering for units comprising a larger service connection, such as apartments in a multifamily building.
Submission PeriodPeriod in which the manufacturing, processing, and use data are submitted to EPA.
Submit by MailSubmit or serve by means other than personal service.

2,959 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.