Environment terminology · MLC-0121

Environment terms: M (1,833)

Page 1 of 4

• M electrodeThe potential electrode nearest to the A electrode in a resistivity device.
• M Phase ProcessThe last cell cycle stage during which the replicated daughter chromosomes separate in to separate nuclei...
• M10A Mixture Of 10 Percent Methanol And 90 Percent Gasoline.
• M10 Offshore FacilityOffshore facilities continuously manned by ten (10) or more persons. [40 CFR 435.11 (CFR 2013)]
• M91M Offshore FacilityOffshore facilities continuously manned by nine (9) or fewer persons or only intermittently manned by any...
• Machine PolishingOperation which removes fine excess metal from a surface to prepare the surface for more refined finishing...
• Machine Readable DataData formats that may be readily parsed by computer programs without access to proprietary libraries. For...
• Machine ShopFacility performing cutting, grinding, turning, honing, milling, deburring, lapping, electrochemical...
• Machinery MeasurementRegulatory metrics not specifically limited to vehicles.
• Machining1. Removing stock from a part (as chips) by forcing a cutting tool against the part. This includes machining...
• MachinistUses machine tools, such as lathes, milling machines, and grinders, to produce precision metal parts...
• Macro accounting1. A compilation of methods for tracking and measuring the level of economic activity, including total flows...
• macroaggregateA relatively large particle (as of soil).
• Macroalgae1. Algae that are easily seen by the naked eye, are multicellular and appear in a variety of colors (red...
• MACRODATAAggregated, or summarized, data.
• Macro-Economic ModelA model of the interactions between the goods, labor, and assets markets of an economy. The model is...
• Macroinvertebrate1. A larger organism without a spinal column, such as an aquatic insect.
• Macroinvertebrate Index of Biotic ConditionThe sum of a number of individual measures of biological condition, such as the number of taxa in a sample...
• Macroinvertebrates1. Animals without backbones of a size large enough to be seen by the unaided eye and which can be retained...
• MacrolichenA foliose or fruticose lichen; physical features are seen with the naked eye.
• Macromolecular Sequence Alteration ProcessAny subcellular process that results in a specific change in the primary sequence of a biological...
• MacrophageA type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the...
• Macrophyte1. An individual alga large enough to be seen with the naked eye.
• MacroporeSecondary soil feature such as root holes or desiccation cracks that can create significant conduits for...
• Macropores1. Secondary soil features such as root holes or desiccation cracks that can create significant conduits for...
• Macroscopic Organisms(MACK-row-SKAWP-ick) Organisms big enough to be seen by the eye without the aid of a microscope.
• MACT Approval NoticeDocument issued by a permitting authority containing all federally enforceable conditions necessary to...
• MACT Emissions Limitation for New SourcesEmission limitation which is not less stringent that the emission limitation achieved in practice by the best...
• Madden-Julian OscillationTropical rainfall exhibits strong variability on time scales shorter than the seasonal El Nino-Southern...
• Maedi-Visna DiseaseDemyelinating leukoencephalomyelitis of sheep and goats caused by the Visna-maedi virus. It is similiar to...
• MagmaHot, melted rock under the Earth's crust. Magma becomes lava when it is released through a volcano or other...
• Magnaporthe griseaBlast disease of rice caused by the filamentous ascomycete Magnaporthe otyzae (Magnaporthe grisea [T.T...
• magnehelic gaugeA sensitive differential pressure or vacuum gauge manufactured by Dwyer Instrument Co. that uses a precision...
• Magnesite Cement CoatingCoating formulated and recommended for application to magnesite cement decking to protect the magnesite...
• magnesiumA base cation that helps to reduce acidification.
• Magnesium ChlorideInorganic compound consisting of one magnesium and two chloride ions. The compound is used in medicine as a...
• Magnesium Chloride Storage BinVessels that store dried magnesium chloride powder produced from the spray drying operation.
• Magnesium CompoundsInorganic compounds that contain magnesium as an integral part of the molecule.
• Magnesium OxideMagnesium oxide (MgO). An inorganic compound that occurs in nature as the mineral periclase. In aqueous media...
• Magnesium PeroxideMgO2. An oxygen-releasing compound that is used in bioremediation of soil and in aiding the decomposition of...
• Magnetic CoatingCoatings applied to base substrates to make magnetic tape. Components of magnetic coatings may include...
• Magnetic Drive PumpPump where an externally-mounted magnet coupled to the pump motor drives the impeller in the pump casing. In...
• magnetic geophysical methodsMethods of determining subsurface conditions by measuring the earth's total magnetic field at a particular...
• Magnetic ParticleParticles in the coating mix that have magnetic properties. Examples of magnetic particles used in magnetic...
• Magnetic permeabilityCharacteristic of a material, it is proportional to the magnetism induced in that material divided by...
• Magnetic Separation1. Use of magnets to separate ferrous materials from mixed municipal waste stream.
• Magnetic susceptibilityA measure of the extent to which a substance may be magnetized; it represents the ratio of magnetization to...
• Magnetic Tape1. Any flexible substrate that is covered on one or both sides with a coating containing magnetic particles...
• Magnetic Tape Manufacturing OperationAll of the emission points within a magnetic tape manufacturing facility that are specifically associated...
• Magnetics, geomagneticsGeophysical methodology for studying anomalies in the geomagnetic field due to non-uniform magnetization of...
• MagnetizationThe magnetic moment per unit volume. It is a vector quantity. See also magnetic susceptibility.
• MagnetometerA device for measuring the earth's magnetic geomagnetic field. Variations in the field strength may indicate...
• MagnetosphereRegion around the earth in which the earth's magnetic field plays a dominant part in controlling the physical...
• MagnetrometryMagnetrometry is a geophysical technology used to detect disruptions that metal objects cause in the earth's...
• MAGNIFICATION RATIOIn microform records, the expression of how much an optical device enlarges an object. Usually stated as 16x...
• Main Break EventA leak in a main line of a system supplying water
• Main Street ProgramCommunity-driven efforts to revitalize older business districts based on their unique assets, such as...
• Main Street ProgramsCommunity-driven efforts to revitalize older business districts based on their unique assets, such as...
• Maine CoastalThe coastal drainage and associated waters from the Maine-New Brunswick international boundary to Cape Small...
• MAINFRAME COMPUTERA large digital computer, normally able to process and store more data than a minicomputer and far more than...
• Mainland BeachAny beach that is connected to the mainland, whether fronting bluffs, dunes, or extensive marshes.
• Mainland CoveSmall embayment or narrow indentation in a mainland coast. These coves usually have narrow entrances and are...
• MainshockThe mainshock is the largest earthquake in a sequence, sometimes preceded by one or more foreshocks, and...
• Mainstem1. The primary, and generally largest, branch of a river.
• Mainstem BayThe Chesapeake Bay, from Havre de Grace, Maryland to the Virginia Capes, without the tidal tributaries and...
• Mainstem RiverThe region of Chesapeake Bay extending from the Susquehanna River to the mouth of the Bay, not including the...
• Maintained According to Factory RecommendationThe frequency of routine maintenance as recommended by the manufacturer.
• Maintained Engineered CoverVegetated cover, usually made of compacted clean soil. It is generally placed over a source at its closure...
• Maintenance1. Care and upkeep of the surrounding environment.
• Maintenance Area1. Area that was designated nonattainment for a specific NAAQS and was redesignated to attainment for that...
• Maintenance EventSingle maintenance activity for which the engine is removed from service. Once the engine is returned to...
• Maintenance InstructionInstructions for maintenance, use, and repair, which the Administrator is authorized to require pursuant to...
• MAINTENANCE OF EFFORTA requirement contained in certain legislation or regulations that a recipient must maintain/contribute a...
• Maintenance Plan1. Implementation plan for an area for which the State is currently seeking designation or has previously...
• Maintenance Wastewater1. Wastewater generated by the draining of process fluid from components in the process unit, whose primary...
• Maintenance-of-Way EquipmentEquipment which may be located on or operated from rail cars including: Ballast cribbing machines, ballast...
• Major ApplianceRefers to many different types, sizes, and styles of ovens, microwave ovens, air-conditioners, refrigerators...
• Major Cylinder ComponentPiston assembly, cylinder liner, connecting rod, or piston ring set.
• Major data groupA logical grouping of related Data Blocks that fully describe business area, functions, and entities.
• Major Disaster1. Any natural catastrophe (including any hurricane, tornado, storm, high water, wind-driven water, tidal...
• Major DischargeDischarge of more than 10,000 gallons of oil to the inland waters or more than 100,000 gallons of oil to the...
• Major Facility1. Any NPDES facility or activity classified as such by the Regional Administrator, or in the case of...
• Major Federal Action1. An action by a federal agency that potentially has a significant impact or an action by a non-federal...
• Major fiber release episodeAny uncontrolled or unintentional disturbance of ACBM, Resulting in a visible emission, which involves the...
• Major FloodingExtensive inundation of structures and roads. Significant evacuations of people and/or transfer of property...
• Major GeneGenes that cause large trait differences between organisms that inherit different alleles.
• Major Hazardous Air Pollutant FacilityAny facility that emits greater than 10 tpy of any HAP, or that emits a combined total of all HAP of over 25...
• Major Industrial Use SectorIndustrial category which EPA has reviewed under the SNAP program with historically high consumption patterns...
• Major IonConstituents commonly present in concentrations exceeding 1.0 milligram per liter. Dissolved cations...
• Major (Large) AppliancesRefers to many different types, sizes, and styles of ovens, microwave ovens, air-conditioners, refrigerators...
• Major Life ActivityFunctions such as caring for one’s self, performing manual tasks, walking, seeing, hearing, speaking...
• Major Maintenance RepairAny maintenance, service, or repair that involves the removal of any or all of the following appliance...
• Major Maintenance ServiceAny maintenance, service, or repair that involves the removal of any or all of the following appliance...
• Major Maintenance, Service, or RepairMaintenance, service, or repair that involves removal of the appliance compressor, condenser, evaporator, or...
• Major Modification1. This term is used to define modifications of major stationary sources of emissions with respect to...
• Major or Designated Water Recreation AreaA major water recreation area is an area used by a large number of people for recreational purposes (e.g., a...
• Major Prevention of Serious Deterioration ModificationMajor modification as defined in 40 CFR 52.21.
• Major Prevention of Serious Deterioration Modification Stationary SourceMajor stationary source as defined in 40 CFR 52.21(b)(1).
• Major Process ChangeIntroduction of a new process, process equipment, or regulated substance, an alteration of process chemistry...
• Major Production and Processing Equipment1. Reciprocating or centrifugal compressors, glycol dehydrators, heater/treaters, separators, and storage...
• Major ReleaseRelease of any quantity of hazardous substance(s), pollutant(s), or contaminant(s) that poses a substantial...
• Major River DeltaThe nearly flat, alluvial tract of land at the mouth of a river, which commonly forms a triangular or...
• Major Site Cleanup MilestoneMajor cleanup milestones at a site include the first cleanup action completed, proposal to the NPL, final NPL...
• Major Site Cleanup MilestonesMajor cleanup milestones at a site include the first cleanup action completed, proposal to the NPL, final NPL...
• Major Source1. Major is a term used to determine the applicability of permitting regulations to specific sources. What...
• Major Source ConstructionTo fabricate, erect, or install at any greenfield site a stationary source or group of stationary sources...
• Major Source Minor ModificationModification at a major source that does not qualify as a major modification under § 49.167 or § 52.21 of...
• Major Source ReconstructionReplacement of components at an existing process or production unit that in and of itself emits or has that...
• Major SourcesDefined by the Clean Air Act as facilities that emit or have the potential to emit 10 tons of any one toxic...
• Major Stationary Source1. Any stationary facility or source of air pollutants which directly emits, or has the potential to emit...
• Major Stationary SourcesTerm used to determine the applicability of Prevention of Significant Deterioration and new source...
• Major StreetThe transportation network that includes a hierarchy of freeways, arterials, and collectors to service...
• Major U.S. WatershedsThis menu includes major watersheds: Albemarle and Pamlico Sounds, Apalachicola-Chattahoochee-Flint River...
• Majority DeterminismA point of view in resource planning which advocates making resource use and allocation decisions on the...
• Majority Owned EntityWhen a corporate entity has at least a fifty percent stake in another entity.
• Major/Non-Major IndicatorA facility classification from the NPDES permitting authorities based on toxic pollutant potential, ratio of...
• MajorsLarger publicly owned treatment works (POTWs) with flows equal to at least one million gallons per day (mgd)...
• MakeMake is the manufacturing company, or, in some cases, a division of a manufacturing company, such as...
• Make Available for UseTo distribute, sell, ship, deliver for shipment, or receive and (having so received) deliver, to any person...
• Make Polyether Polyol ProductProduce the polyether polyol by polymerization of epoxides or other cyclic ethers with compounds having one...
• Make-Up AirAir brought into a building from outdoors through the ventilation system and that has not been previously...
• Makeup AirOutdoor air supplied to replace exhaust air and exfiltration.
• Makeup ChemicalCarbonate chemicals (e.g., sodium and calcium carbonates) that are added to the chemical recovery areas of...
• Makeup SolventSolvent introduced into the affected facility that compensates for solvent lost from the affected facility...
• Malaise1. A vague feeling of bodily discomfort
• Malaria1. A disease, more common in areas with warm climates (e.g., South America, Africa), that is caused by a...
• MalathionCASRN 121-75-5 Malathion is an insecticide that does not occur naturally. Pure malathion is a colorless...
• Male Animal Reproductive SystemOrgans of the male animal which serve to support the production of offspring
• Male GenitaliaMale internal and external organs of reproduction. (CDISC Definition).
• Male Reproductive SystemMale reproductive organs of any species; in humans, divided into the external organs (penis, scrotum, and...
• Male Reproductive System DisordersA non-neoplastic or neoplastic disorder that affects the male genital system. Representative examples of...
• Malfunction1. Any unanticipated and unavoidable failure of air pollution control equipment or process equipment or of a...
• Malfunction Alarm and Remote Notification SystemSystem connected to an electronically controlled automatic ignition device that sends an alarm through a...
• MalignantVery dangerous or virulent, causing or likely to cause death.
• Malignant Catarrhal FeverA herpesvirus infection of cattle characterized by catarrhal inflammation of the upper respiratory and...
• Malignant Tumor1. An abnormal growth of tissue which can invade adjacent or distant tissues.
• Malleable IronA cast iron made by a prolonged anneal of white cast iron in which decarburization or graphitization, or...
• MalpighialesA large order of flowering plants, not necessarily morphologically alike.
• MaltoryzineA new toxic metabolite produced by a strain of Aspergillus oryzae var. microsporus isolated from the...
• MaltoseA dextrodisaccharide from malt and starch. It is used as a sweetening agent and fermentable intermediate in...
• Malus domesticaThe cultivated apple
• MammalWarm-blooded vertebrates that give birth to and nurse live young; have highly evolved skeletal structures...
• MammaliaWarm-blooded vertebrate animals belonging to the class Mammalia, including all that possess hair and suckle...
• Mammalian Cardiovascular SystemIn mammals, the system that contains the heart and the blood vessels and moves blood throughout the body.
• Mammalian Digestive SystemA group of organs stretching from the mouth to the anus serving to breakdown foods, assimilate nutrients, and...
• Mammalian Endocrine System1. Endocrine System consists of functions of cellular, cell, or tissue components of glands that release...
• Mammalian Genitourinary SystemThe body system that includes all organs involved in reproduction and in the formation and voidance of urine.
• Mammalian Hematopoietic SystemThe bodily system of organs and tissues, primarily the bone marrow, spleen, tonsils, and lymph nodes...
• Mammalian Immune SystemA system that provides the organism with a defense against infection. In higher organisms it is afforded by...
• Mammalian Integumentary SystemThe outer covering of the body composed of the skin and the skin appendages.
• Mammalian Liver FunctionPhysiological activity and functions of the liver, including production of bile, removal of glucose from...
• Mammalian Musculoskeletal SystemThe system of muscles, tendons, ligaments, bones, joints and associated tissues that move the body and...
• Mammalian Nervous SystemEntire nerve apparatus; in higher animals it is composed of a central part, the brain and spinal cord, and a...
• Mammalian Physiological PhenomenaThe functions and properties of living organisms, including both the physical and chemical factors and...
• Mammalian Reproductive SystemThe organs and tissues involved in the production and maturation of gametes and in their union and subsequent...
• Mammalian Respiratory SystemThe tubular and cavernous organs and structures, by means of which pulmonary ventilation and gas exchange...
• Mammalian Urinary SystemThe organs involved in the creation and excretion of urine.
• Mammary GlandGlandular tissue in the breast of human that is under the influence of hormones such as estrogens...
• Manage Agency Strategic PlanActivities to establish and maintain a coordinated strategic planning process that includes goal-based...
• Manage Air QualityActivities to ensure that American communities and surrounding ecosystems will be safe from harmful levels of...
• Manage Air Toxics SourcesIncludes activities to control emissions of toxic air pollutants from all sources.
• Manage AuditsActivities to track audit recommendations and issues raised by the Office of the Inspector General, work with...
• Manage Contracts & IAGsActivities to award and manage contracts and interagency agreements (IAGs) to acquire goods and services to...
• Manage Core Internal PaymentsActivities to provide appropriate control over payments made by or on behalf of the Agency in support of...
• Manage CostsActivities to measure the full costs of programs, and their various elements, activities, and outputs. Cost...
• Manage Environmental Finance ProgramActivities to coordinate the Environmental Financial Advisory Board, the Environmental Financing Information...
• Manage Environmental Risk from SubstancesActivities to manage the risks of substances introduced into the environment as commercial products.
• Manage Grants PaymentsActivities to provide appropriate control over grant payments made by or on behalf of the Agency to state...
• Manage IAG & Contracts PaymentsActivities to provide appropriate control over contract and IAG payments made by or on behalf of the Agency...
• Manage Indoor Air QualityActivities to reduce human exposure to indoor air pollution, including radon, environmental tobacco...
• Manage Mobile Air Pollution SourcesIncludes activities to control emissions of primary and secondary pollutants from mobile sources, such as...
• Manage Non-Point Sources of Water PollutionIncludes activities to prevent, reduce, and eliminate discharge of pollutants from non-point sources into the...
• Manage Organizations & PositionsActivities to plan, create, maintain, and populate an organizational structure and associated positions as...
• Manage PerformanceActivities to administer a process to provide for the review, assessment and acknowledgment of employee...
• Manage Point Sources of Water PollutionIncludes activities to prevent, reduce, and eliminate the direct and indirect discharge of pollutants from...
• Manage RadiationIncludes activities for radiation clean-up, production of federal radiation guidance, risk modeling, clean...
• Manage ReceiptsActivities to record Agency cash receipts, including servicing and collecting receivables. Receivables are...
• Manage Risks from Underground TanksActivities to manage the environmental risks associated with underground tanks.
• Manage Risks from WastesActivities to protect land, air and water resources by reducing hazardous and non-hazardous waste generation...
• Manage State & Local Air QualityIncludes activities to develop and implement programs for the prevention and control of air pollution and to...
• Manage Stationary Air Pollution SourcesIncludes activities to control emissions of primary and secondary pollutants from stationary sources, such as...
• Manage SubstancesAll regulatory activities to require reporting about, and manage the production, distribution and release of...
• Manage Toxic SubstancesActivities to manage the manufacture, distribution, use, processing, and disposal of toxic substances to...
• Manage Water QualityActivities to ensure the maintenance of oceans, watersheds, waterways, and aquatic ecosystems to support...
• Manage WatershedsActivities to support the planning and implementation of programs to manage water quality on a watershed...
• Manage WetlandsActivities to manage, protect, and restore the wetlands of the United States, including such tools as...
• Manage Workforce LevelsManage the current workforce against current workforce ceilings.
• Managed EcosystemAn ecosystem that is controlled by humans to provide selected ecosystem services
• Managed ForestArea managed for the production of timber and other forest products or maintained as wood vegetation for such...
• Management1. The guidance and control of action required to execute a program. Also, the individuals charged with the...
• Management AssessmentThe qualitative assessment of a particular program operation and/or organization(s) to establish whether the...
• Management AuthorityEPA organizational entity assigned responsibility for implementing the management functions identified in §...
• management choiceThe decision/management alternative that is chosen or selected as a result of a decision making process...
• Management Control1. When it is used to join all entities under common management, means any one or a combination of the...
• Management EntityAn entity similar to a responsible management entity, but managing a limited set of management activities...
• Management FeesExpenses added to direct costs in order to accumulate and reserve funds for ongoing business expenses...
• management goal1. A goal is a general statement of the desired outcome for the overall decision that would solve the problem...
• Management ImprovementManagement Improvement includes all efforts to gauge the ongoing efficiency of business processes and...
• Management Information System1. An information collection and analysis system, usually computerized, that facilitates access to program...
• Management measureA group of cost-effective practices implemented cooperatively to achieve more comprehensive goals, such as...
• Management measuresAs defined in section 6217(g)(5) of CZARA; "economically achievable measures for the control of the addition...
• Management ModelA 13-element program designed to protect and sustain public health and water quality through the use of...
• management objectiveAn objective is a more specific statement of the desired outcome. It should be specific enough to allow...
• Management of Government ResourcesManagement of Government Resources refers to the back office support activities that enable the government to...
• Management of Public Water SystemsActivities to support the development and implementation of national safe drinking water standards as applied...
• Management PlanUnder the Asbestos Hazard Emergency Response Act (AHERA), a document that each Local Education Agency is...
• Management practiceA method that is effective and practical for preventing or reducing pollution from nonpoint sources...
• Management ProgramA program that is created/maintained to achieve specific objectives and targets within the management system...
• Management ServicesPlanning, design, permitting, inspection, construction/installation, operation, maintenance, monitoring...
• Management System1. A structured non-technical system describing the policies, objectives, principles, organizational...
• Management Systems Review1. The qualitative assessment of a data collection operation and/or organization(s) to establish whether the...
• Managerial Controls1. Methods of nonpoint source pollution control that are derived from managerial decisions, such as changes...
• Mandated Reporting ChemicalAny chemical substance that is in the Master Inventory File at the beginning of a submission period described...
• Mandatory Class I Federal AreaAny area identified in part 81, subpart D of this title.
• Mandatory Class I Federal Area VisibilityAny integral vista associated with that area.
• Mandatory Federal Class I AreaAny area identified in part 81, subpart D of this title.
• Mandatory Greenhouse Gas Reporting1. Mandatory greenhouse gas (GHG) reporting requires applicable companies and organizations to report their...
• Mandatory RecyclingPrograms which by law require consumers to separate trash so that some or all recyclable materials are...
• MandibleJaw-like organs on some invertebrates that are used for seizing and biting food.
• MandiblesJaw-like organs on some invertebrates that are used for seizing and biting food.
• ManganeseAn element designated by the symbol Mn and atomic number 25. It is found as a free element in nature (often...
• Manganese CompoundsInorganic chemicals that contain manganese as an integral part of the molecule.
• Manganese Compounds (1.0)Includes any unique chemical substance that contains manganese as part of that chemical's infrastructure.
• Manganese Oxidizing BacteriaProkaryotic bacteria which oxidize Manganese+2 to Mn0x where x is more than 1.
• Mangrove HabitatSwamp communities that develop along sheltered tropical and subtropical shores where sediments accumulate in...
• Mangrove SwampA coastal marine swamp of tropical or subtropical regions dominated by mangrove trees.
• Mangrove swampsA coastal marine swamp of tropical or subtropical regions dominated by mangrove trees.
• ManiaA phase of mental disorder characterized by an expansive emotional state, elation, over-talkativeness, and...
• Manifest1. A one-page form used by haulers transporting waste that lists EPA identification numbers, type and...
• Manifest SystemTracking of hazardous waste from "cradle to grave" (generation through disposal), with accompanying documents...
• Manifest Tracking NumberThe alphanumeric identification number (i.e., a unique three letter suffix preceded by nine numerical...
• Manifold1. A large pipe to which a series of smaller pipes are connected.
• Manipulation of Exposure1. A type of evidence in which human action induces, eliminates, or modifies exposure to a stressor (e.g...
• Manipulationist causation1. Manipulationist causation is the proposition that we know that a causal relationship exists when we have...
• Man-Made (Anthropogenic) Beta Particle and Photon EmittersAll radionuclides emitting beta particles and/or photons listed in Maximum Permissible Body Burdens and...
• Man-made Beta Particle and Photon Emitters (regulatory)All radionuclides emitting beta particles and/or photons listed in Maximum Permissible Body Burdens and...
• Man-Made Beta Particle and Photon EmittingAll radionuclides emitting beta particles and/or photons listed in Maximum Permissible Body Burdens and...
• Man-Made DebrisDebris that is made by human activities which do not involve goods production.
• Man-made RadiationRadiation that is produced to generate electricity and for medical, manufacturing and consumer purposes.
• Manned Control CenterElectrical power distribution control room where the operating conditions of a PCB Transformer are...
• Manometer1. (man-NAH-mut-ter) An instrument for measuring pressure. Usually, a manometer is a glass tube filled with a...
• MantleA membranous or muscular structure in mollusks that surrounds the visceral mass and secretes a shell if one...
• Mantle CavityThe space between the mantle and the rest of the body parts of a mollusk, which contains several important...
• ManualAn instruction handbook.
• Manual Liquids UnloadingUnloading when field personnel attend to the well at the well-pad, for example to manually plunge a well at...
• Manual MethodMethod for measuring concentrations of an ambient air pollutant in which sample collection, analysis, or...
• Manual SeparationHand sorting of recyclable or compostable materials in waste.
• Manual-Grade StrappingRefers to straps of material used with transport packaging to hold products in place on pallets or in other...
• Manufacture1. Physical and engineering process of designing and/or constructing a portable fuel container.
• Manufacture as a ByproductThe EPCRA Section 313 chemical is produced coincidentally during the manufacture, processing, or otherwise...
• Manufacture as an ImpurityThe EPCRA Section 313 chemical is produced coincidentally as a result of the manufacture, processing, or...
• Manufacture Date1. One of the following:(1) For engines, the date on which the crankshaft is installed in an engine block...
• Manufacture for Commercial Purposes1. To import, produce, or manufacture with the purpose of obtaining an immediate or eventual commercial...
• Manufacture for On-Site Use/Processing1. The EPCRA Section 313 chemical is produced or imported and then further processed or otherwise used at the...
• Manufacture for Sale/DistributionThe EPCRA Section 313 chemical is produced or imported specifically for sale or distribution outside the...
• Manufacture Import or Process for Commercial PurposesTo import, produce, manufacture, or process with the purpose of obtaining an immediate or eventual commercial...
• Manufacture or Import for Commercial Purposes1. To manufacture, produce, or import with the purpose of obtaining an immediate or eventual commercial...
• Manufacture Solely for Export1. Manufacture solely for export means to manufacture or import for commercial purposes a chemical substance...
• Manufacture with Controlled SubstanceManufacturer of the product itself used a controlled substance directly in the product's manufacturing, but...
• Manufactured ChemicalChemical products created by transforming organic and inorganic raw materials with chemical processes.
• Manufactured Nanomaterial1. "Nanosized materials are purposefully made. These are in contrast to incidental and naturally occurring...
• Manufactured Stormwater Management DeviceManufactured devices include a variety of proprietary and non-proprietary stormwater management practices...
• Manufacturer by Product1. Manufacturers categorized by their products.
• Manufacturer ClaimAssertion made by a manufacturer regarding the effectiveness of his product.
• Manufacturer-Owned Marine Engine1. Uncertified marine SI engine owned and controlled by a marine SI engine manufacturer and used in a manner...
• Manufacturer-Owned Nonroad Engine1. Uncertified nonroad engine owned and controlled by a nonroad engine manufacturer and used in a manner not...
• Manufacturer-Requested Risk EvaluationAny chemical substance risk evaluation conducted at the request of one or more manufacturers of that chemical...
• Manufacturer's FormulationA list of substances or component parts as described by the maker of a coating, pesticide, or other product...
• Manufacturer's Formulation Data1. Data on a material (such as a coating) that are supplied by the material manufacturer based on knowledge...
• Manufacturer's Rated Dryer CapacityDryer's rated capacity of articles, in pounds or kilograms of clothing articles per load, dry basis, that is...
• Manufacturing ActivityAn energy-consuming subsector of the industrial sector that consists of all facilities and equipment engaged...
• Manufacturing Batch Process1. Product of an individual production run of a coating manufacturer's process. A batch may vary in...
• Manufacturing Facility by Product TypeAn industrial site where goods are made. Organization is by kind of goods produced.
• Manufacturing IndustryThe Manufacturing sector comprises establishments engaged in the mechanical, physical, or chemical...
• Manufacturing ProcedureManufacturing steps or actions that are used in making a variety of products.
• Manufacturing ProcessAll of a series of unit operations operating at a site, resulting in the production of a product.
• Manufacturing Process by ProductManufacturing processes categorized by the type of product they make.
• Manufacturing Reaction VesselReaction vessel in which the chemical substance was manufactured and other equipment which is strictly...
• Manufacturing Sector ChemicalChemical substances manufactured or formulated for commercial or manufacturing use which are categorized by...
• Manufacturing StreamAll reasonably anticipated transfer, flow, or disposal of a chemical substance, regardless of physical state...
• Manufacturing Use Product1. An MP or MUP is any pesticide product other than an end use product. A product may consist of the...
• Manure1. Dung and urine of animals that can be used as a form of organic fertilizer.
• Manure CompostingBiological oxidation of a solid waste including manure usually with bedding or another organic carbon source...
• Manure Treatment(Treatment of) the fecal and urinary excretions of livestock and poultry.
• Manuscript1. To individually tailor policies to suit each insured. Unlike "boilerplate" policies for vehicle or...
• Map of Radon ZonesEPA's Map of Radon Zones assigns each of the 3,141 counties in the United States to one of three zones based...
• Map of Revision Checklist MaterialsProvides a good summary of the relationship between (1) the SPAs, (2) the Federal promulgation dates of final...
• Map projectionA mathematical formula or algorithm for translating the coordinates of features on the surface of the Earth...
• Map resolutionThe accuracy with which the location and shape of map features are depicted for a given map scale.
• Map scaleA statement of a measure on the map and the equivalent measure on the earth, often expressed as a...
• MappingLocating geological, chemical or geophysical information in space (as opposed to time, which is monitoring)...
• Marcellus ShaleA sedimentary formation that underlies most of Pennsylvania and West Virginia and extends into parts of...
• Marek’s DiseaseAn important infectious disease of poultry, that is caused by infection with a herpesvirus.
• margin, activeA continental margin located where the edges of lithospheric plates are colliding, resulting in tectonic...
• Margin of Exposure1. The LED₁₀ or other point of departure divided by the actual or projected environmental exposure of...
• Margin of Safety1. A required component of the TMDL that accounts for the uncertainty about the relationship between the...
• margin, passiveA continental margin located in the middle of a lithospheric plate (see lithosphere) where tectonic activity...
• Marginal AnalysisExamining decisions at the margin or involving small changes.
• Marginal Benefit1. Additional benefit from one additional unit consumed.
• marginal changeA proportionally very small addition or subtraction to the total quantity or quality of some variable, such...
• Marginal conditionThe state that exists when the nominal and subnominal criteria are not contiguous.
• Marginal Cost1. Additional cost from one additional unit produced or one additional unit purchased.
• marginal costsThe incremental cost of increasing output of a good or service by a small amount.
• Marginal DistributionThe distribution of a single variable based upon an underlying distribution of two or more variables.
• Marginal social benefitThe marginal benefit received by the consumer of a good (marginal private benefit) plus the marginal benefit...
• Marginal social costThe marginal cost incurred by the producer of a good (marginal private cost) plus the marginal cost imposed...
• Marginal-Cost Pricing1. A method of rate design where prices reflect the costs associated with producing the next increment of...
• Marginally Attached WorkerPersons not in the labor force who want and are available for work, and who have looked for a job sometime in...
• MarineA species that lives in the ocean.
• Marine Basin FloorBasin floors refer broadly to the areas of the seafloor between the base of the continental margin (usually...
• Marine Boundary LayerThe part of the atmosphere that is directly contacted and influenced by the ocean.
• Marine Compression Ignition EngineAuxiliary and propulsion engines used by all types of recreational and commercial vessels: small fishing...
• Marine Diesel EngineFor the purposes of this subpart I only, marine diesel engine means a diesel engine installed on a Category 1...
• Marine Engine1. Nonroad engine that is installed or intended to be installed on a marine vessel. This includes a portable...
• Marine Engine Category 11. Relating to a marine engine with a rated power greater than or equal to 37 kilowatts and a specific engine...
• Marine Engine Category 21. Relating to a marine engine with a specific engine displacement greater than or equal to 5.0 liters per...
• Marine Engine Category 31. Relating to a marine engine with a specific engine displacement greater than or equal to 30 liters per...
• Marine Engine ManufacturerAny person engaged in the manufacturing or assembling of new marine SI engines or the importing of such...
• Marine Engine Model YearFor an uncertified marine engine excluded under § 1042.5 that is later subject to this part as a result of...
• Marine EnvironmentThat territorial seas, the contiguous zone and the oceans.
• Marine EquipmentDevices engineered to be used in or withstand exposure to environments containing saltwater.
• Marine FuelDiesel, distillate, or residual fuel used, intended for use, or made available for use in C3 marine vessels...
• Marine FungusFungi that exclusively habitat oceans, seas or estuaries and are permanently or intermittently submerged in...
• Marine Generated WasteAny waste, wastewater, and/or used material generated as part of the normal maintenance and operation of a...
• Marine Generator EngineAuxiliary marine engine used primarily to operate an electrical generator or alternator to produce electric...
• Marine Hydrokinetic EnergyThe ocean produces two very different types of energy: (1) thermal energy from the sun's heat, and (2)...
• Marine LakeAn inland body of permanently standing brackish or saline water whose water level is commonly influenced by...
• Marine MicroorganismMicroorganisms which live in the oceans or seas which are saltwater.
• Marine Nearshore SubsystemThe Marine Nearshore Subsystem extends from the landward limit of the Marine System to the 30 meter depth...
• Marine Nutrient Maximum LayerA layer or region in the water column that has high concentrations of a particular nutrient or nutrients due...
• Marine Nutrient Minimum LayerA layer in the ocean where net nutrient accumulation is at a minimum, often due to a locus of high biological...
• Marine Oceanic Abyssopelagic LayerThe region of the water column that is generally in contact with the abyssal seafloor, except in deep basins...
• Marine Oceanic Bathypelagic LayerThe region where light does not penetrate, rendering the water column totally dark except for...
• Marine Oceanic Epipelagic Lower LayerWithin the Epipelagic Layer, the region below the Epipelagic pycnocline if present (or below mid-depth [100...
• Marine Oceanic Epipelagic PycnoclineWithin the Epipelagic Layer, the Marine Oceanic Epipelagic Pycnocline is the zone of maximum vertical change...
• Marine Oceanic Epipelagic Upper LayerThe Epipelagic Layer is the upper 200 meters of the oceanic water column. Within the Epipelagic, the Marine...
• Marine Oceanic Hadalpelagic LayerThe deepest waters of the globe occur in trenches and deep basins generally at depths greater than 6,000...
• Marine Oceanic Mesopelagic LayerThe region where light is vertically attenuated to below the level required for photosynthesis, generally...
• Marine Oceanic SubsystemLies beyond the shelf break, extending to waters of great depth in the central ocean.
• Marine Oceanic Surface LayerThe interface between the atmosphere and the water column, extending to a depth of several centimeters...
• Marine Offshore SubsystemThe Marine Offshore Subsystem extends from the 30 meter depth contour to the continental shelf break, as...
• Marine PlantPlants that live in seawater.
• Marine Pollution Control DeviceAbbreviated MPCD, any equipment or management practice installed or used on an Armed Forces vessel that is...
• Marine PrimerCoating designed and labeled exclusively to meet federal specification TT-P-1757.
• Marine Protected AreaMarine protected areas (MPAs) are areas of the oceans or Great Lakes that are protected for a conservation...
• Marine Protection, Research & Sanctuaries ActTo regulate the transportation for dumping, and the dumping, of material into ocean waters, and for other...
• Marine Sanitation Device1. Any equipment or process installed on board a vessel to receive, retain, treat, or discharge sewage.
• Marine Snow AggregationA concentration of organic material in the ocean water column. Composed of a mix of mineral, dead organic...
• Marine Spar VarnishCoating designed and labeled exclusively to provide a protective sealant for marine wood products.
• Marine Spark Ignition Engine Eligible SaleMarine SI engines sold for purposes of being used in the United States and include any engine introduced into...
• Marine Spark Ignition Engine VesselRelating to vessels powered by engines that are subject to exhaust emission standards in 40 CFR part 1045.
• Marine Spark-Ignition Engine1. Engines for gasoline boats and personal watercraft: pleasure boats, jet-skis, outboard engines, and stern...
• Marine SpeciesA species that lives in the ocean.
• Marine SystemThe Marine System is defined by salinity, which is typically about 35, although salinity can measure as low...
• Marine TerminalPort facilities for docking, cargo-handling and storage.
• Marine Terrace1. A narrow, coastal strip, formed of deposited material, that slopes gently seaward.
• Marine Transportation SystemConsists of all the intermodal components that are part of the maritime domain, including ships, ports...
• Marine Vessel1. Meaning given in 1 U.S.C. 3, except that it does not include amphibious vehicles. The definition in 1...
• Marine Vessel ManufacturerAny person engaged in the manufacturing or assembling of new marine vessels or importing such marine vessels...
• Marital StatusAdults are generally classified by marital status as being married, never married, separated, divorced or...
• MaritimeLocated on or near the sea. Commerce or navigation by sea. The maritime industry includes people working for...
• Marker GeneIn genetic engineering, an easily identified gene that is inserted into an organism, along with a desired...
• Market EvaluationDetermines changes that have occurred in the marketplace and evaluates how the market is different as a...
• Market FailureA market failure occurs when the allocation of goods and services by the free market is not economically...
• Market GoodsGoods which are both exclusive and rival and allow buyers and sellers to efficiently exchange in a market...
• Market MechanismsThe development and use of private markets and market mechanisms to allow the trading of...
• Market PenetrationThe extent to which an activity or measure is actually implemented compared to all potential uses or markets.
• Market Price1. A price at which a good or service is actually exchanged for another good or service (as an in-kind...
• Market ResearchCollecting and analyzing information about capabilities within the market to satisfy agency needs.
• Market Weight (Pork)240 to 260 lbs.
• Market-based approachesMarket-based approaches to environmental policy include instruments such as taxes, fees, charges and...
• Market-Based InstrumentMarket-based approaches to environmental policy include instruments such as taxes, fees, charges and...
• MarketerProcessing or distributing in commerce, or the person who processes or distributes in commerce, used oil...
• MarketersUsed oil handlers who either 1) direct shipments of used oil to be burned as fuel in regulated devices, or 2)...
• Marketing1. Increasing awareness of a product by advertising.
• Marking BehaviorRelease of urine or other scented body fluid to set territorial limits or as a message to opposite sex members
• Markov chain Monte Carlo1. A type of quantitative modeling that involves a specified set of mutually exclusive and exhaustive states...
• Markup LanguageA way to combine text and extra information to show the structure and layout of a document. This information...
• MARPOL Agreement1978 protocol relating to the international convention for the prevention of pollution from ships.
• Marsh1. A type of wetland that does not accumulate appreciable peat deposits and is dominated by herbaceous...
• Marsh Gas1. Methane gas. If the decaying matter at the bottom of a marsh or pond is stirred, bubbles of methane rise...
• Marsh PlatformThe flat, often thick, accumulation of peat that supports emergent marsh vegetation. It is commonly dissected...
• MaskingThe phenomenon where a quality in a mixture obscures one or more other qualities in it.
• MasonryA general term covering wall construction using masonry materials such as brick, concrete block, stone, and...
• Masonry DamAny dam constructed mainly of stone, brick, or concrete blocks pointed with mortar. A dam having only a...
• Masonry StoveA type of heating appliance similar to a fireplace, but much more efficient and clean burning. They are made...
• Mass Balance1. An equation that accounts for the flux of mass going into a defined area and the flux of mass leaving the...
• Mass Burn FacilityA type of municipal solid waste (MSW) incineration facility in which MSW is burned with only minor presorting...
• Mass Burn Refractory Municipal Waste Combustor1. Field-erected combustor that combusts municipal solid waste in a refractory wall furnace. Unless otherwise...
• Mass Burn Rotary Waterwall Municipal Waste Combustor1. Field-erected combustor that combusts municipal solid waste in a cylindrical rotary waterwall furnace.[40...
• Mass Burn Waterwall Municipal Waste Combustor1. Field-erected combustor that combusts municipal solid waste in a waterwall furnace.[40 CFR 60.51a (CFR...
• Mass Casualty EventMay result from intentional actions (e.g., a terrorist attack) or may be unplanned (e.g., the derailment of a...
• mass fluxThe flow rate of contaminant mass through a defined area, usually a portion of a plume cross section...
• Mass LoadingThe quantity of a pollutant transported to a waterbody.
• Mass Median Aerodynamic DiameterMedian of the distribution of airborne particle mass with respect to the aerodynamic diameter. MMADs are...
• Mass Movement Prone AreaThose areas of influence (i.e., areas characterized as having an active or substantial possibility of mass...
• Mass ProcessPolymerization process carried out through the use of thermal energy. Mass processes do not utilize...
• Mass SpectrometerInstrument that ionizes molecules and atoms (typically into electrically charged fragments), separates these...
• Mass Spectrometer for Volatile Organic MeasurementA chemical method that uses a vacuum distillation method for determining the concentration of volatile...
• Mass Spectrometry1. Mass spectrometry is a method of chemical analysis in which the substance to be analyzed is heated and...
• Mass TransferNatural phenomenon in which a component travels from a region of high concentration to one of low...
• Mass Wasting1. The dislodgment and downslope transport of earth material as a unit under direct gravitational stress. The...
• Massachusetts-Rhode Island CoastalThe coastal drainage and associated waters from the Merrimack River Basin boundary to and including the...
• Mass-balance/tracer techniquesMethod for evaluating soil intake that accounts for both inputs and outputs of tracer elements. Tracers in...
• Mass-Based StandardA discharge limit that is measured in a mass unit such as pounds per day.
• Mass-based trading programA policy approach in which overall mass emissions from a group of regulated sources are capped and regulated...
• Mass-Feed Stoker Steam Generating UnitSteam generating unit where solid fuel is introduced directly into a retort or is fed directly onto a grate...
• Mast Cell1. Granulated cells that are found in almost all tissues, most abundantly in the skin and the...
• MASTER FILESIn electronic records, relatively long-lived computer files containing an organized and consistent set of...
• Master Inventory FileEPA's comprehensive list of chemical substances which constitutes the TSCA Inventory compiled under TSCA...
• Master MeterLarge meter at a point of distribution to multiple uses or users that could be further submetered. Includes...
• Master MeteringA large meter at a point of distribution to multiple uses or users that could be further submetered. Includes...
• MASTER MICROFORMA microform, usually first-generation or camera film, used to produce duplicates or intermediates.
• Master Record Identification (number)EPA's system of recording and tracking studies submitted.
• MastheadMagazine term referring to the printed list, usually on the editorial page of a newspaper or magazine, that...
• Mastic Texture CoatingCoating formulated and recommended to cover holes and minor cracks and to conceal surface irregularities, and...
• MastitisAn inflammation of the mammary gland (or glands), usually caused by bacteria.
• MastocytosisA clonal myeloproliferative neoplasm characterized by the proliferation and accumulation of neoplastic mast...
• Matched Data1. In this context, matched data are values for variables potentially responding to a stressor (usually...
• Matching1. A method utilized to create comparison groups, in which groups or individuals are matched to those in the...
• Matching Funds1. The portion of allowable project costs a recipient contributes to a Federally funded project (sometimes...
• Material and Substance Flow AnalysisMapping of the total use, recycling, and disposal of a specific material or substance in a defined region.
• Material CategoryIn the asbestos program, broad classification of materials into thermal surfacing insulation, surfacing...
• Material Containing Aluminum Foundry Hazardous Air PollutantsMaterial containing one or more aluminum foundry HAP. Any material that contains beryllium, cadmium, lead, or...
• Material Containing ChromiumMaterial that contains chromium (Cr, atomic number 24) in amounts greater than or equal to 0.1 percent by...
• Material Containing Copper Foundry Hazardous Air PollutantsMaterial containing one or more copper foundry HAP. Any material that contains lead or nickel in amounts...
• Material Containing Hazardous Air Pollutants1. Material containing benzene, methylene chloride, or compounds of cadmium, chromium, lead, and/or nickel...
• Material Containing ManganeseMaterial that contains manganese (Mn, atomic number 25) in amounts greater than or equal to 1.0 percent by...
• Material Containing Metal Fabrication and Finishing Hazardous Air Pollutants1. Material containing one or more MFHAP. Any material that contains cadmium, chromium, lead, or nickel in...
• Material Containing Other Nonferrous Foundry Hazardous Air PollutantsMaterial containing one or more other nonferrous foundry HAP. Any material that contains chromium, lead, or...
• Material Input per Unit ServiceThe weighted cradle to-grave material inputs of a good, as defined per units of services obtainable. This...
• Material Processing and DeliveryActivities involved in the processing and delivery of materials to a process.
• Material Recovery Facility1. Refers to a facility where recyclables are sorted into specific categories and processed, or transported...
• Material Recovery Section1. Equipment that recovers unreacted or by-product materials from any process section for return to the...
• Material Safety Data Sheet1. Printed material concerning a hazardous chemical, or Extremely Hazardous Substance, including its physical...
• Material TransformationUse and entirely consume (except for trace concentrations) nitrous oxide or fluorinated GHGs in the...
• Material TypeClassification of suspect material by its specific use or application; e.g., pipe insulation, fireproofing...
• Materials Family1. Grouping of materials with the same basic composition or the same basic end use or functionality produced...
• Materials Handling OperationAny manufacturing function and equipment which works with materials, but is not a process operation.
• Materials in Solid WasteMaterials found in the various components of the solid waste stream. Generally, solid waste has several...
• Materials (or waste) Management StrategyOne of the five strategies in WARM: source reduction, recycling, composting, combustion, and land filling.
• Materials Recovery FacilityA facility that processes residentially collected mixed recyclables into new products available for market.
• Materials ScienceAn interdisciplinary study of the microstructure and composition of various materials such as metals...
• Materials Separation PlanPlan that identifies both a goal and an approach to separate certain components of municipal solid waste for...
• Materials Storage and Handling AreaAny area of a primary lead processor in which lead-bearing materials (including ore concentrate, sinter...
• Materials Storage OperationManufacturing function and equipment which stores materials. This is rarely a process step.
• Maternal Air Pollution ExposureConsistent exposure of pregnant women to polluted air via motor vehicle or industrial emissions, leading to...
• Maternal BehaviorThe behavior patterns associated with or characteristic of a mother.
• Maternity BarnA special needs facility where cows can be closely monitored during the period immediately before and after...
• Mathematical Model1. A system of mathematical expressions that describe the spatial and temporal distribution of water quality...
• Mathematical Model Development(Development of a) theoretical representations that simulate the behavior or activity of systems, processes...
• mathematical modelingA representation of aspects of the behavior of a system by creating an approximate (mathematical) description...
• MatingBreeding a sow or gilt after the onset of estrus and before ovulation, may include at least two services by...
• Matrix1. The substance in which an analyte is embedded or contained; the properties of a matrix depend on its...
• Matrix Assisted Laser Desorption/Ionization Time-of-Flight Mass SpectrometryA laser pulse is fired into a protein or peptide sample contained in a light-absorbing matrix. A small...
• matrix back-diffusion (rebound)Increase in contaminant concentrations after initial treatment has reduced contaminant levels in high...
• matrix based fertilizersFertilizers formulated to reduce nitrate, ammonium, and total phosphorus leaching through binding of nitrogen...
• Matrix EffectManifestation of non-target analytes or physical/ chemical characteristics of a sample that prevents the...
• Matrix EffectsManifestations of non-target analytes or physical/ chemical characteristics of a sample that prevents the...
• Matrix Isolation Electron Spin ResonanceTechnique employed in electron spin resonance studies in which the substance of interest is isolated in an...
• Matrix of CategoriesA method of displaying relationships among themes in analyzing case study data that shows whether changes in...
• Matrix Spike1. Aliquot of a matrix (water or soil) fortified (spiked) with known quantities of specific compounds and...
• Matrix Spike and Matrix Spike DuplicateTwo aliquots of the same environmental sample to which known quantities of the target analytes are added in...
• matrix spike duplicateA second aliquot of the same matrix as the matrix spike (above) that is spiked in order to determine the...
• Matrix Spike SampleA sample prepared by adding a known amount of the target analyte to a specified amount of a matrix. Spiked...
• Matrix Spike (Spiked Sample or Fortified Sample)A sample prepared by adding a known mass of target analyte to a specified amount of matrix sample for which...
• Matrix-Assisted Laser Desorption Ionization Mass SpectrometryA mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are...
• Matrix-Based FertilizerFertilizers formulated to reduce nitrate, ammonium, and total phosphorus leaching through binding of nitrogen...
• Matte Drying and Grinding PlantArea at a primary copper smelter in which wet granulated matte copper is ground in a mill, dried by blowing...
• mat/tree collarA sunlight-blocking device used to block the growth of grass or weeds immediately adjacent to a newly planted...
• MattressBedding material compacted to 3 to 4 inches and sandwiched in a heavyweight polypropolene or other fabric...
• Maturation EffectA threat to the internal validity of an evaluation in which observed outcomes are a result of natural changes...
• Mature TimberTrees that have attained full development, especially height, and are in full seed production.
• Maturity GroupA classification of some crop varieties, especially soybeans, based on their growth and development. For...
• MauiThe drainage on the island of Maui; and associated waters. Hawaii. Area = 730 sq.mi.
• Mauna LoaAn intermittently active volcano 13,680 feet (4,170 meters) high in Hawaii.
• Mauna Loa RecordRecord of measurement of atmospheric CO2 concentrations taken at Mauna Loa Observatory. Mauna Loa. Hawaii...
• Maxilliped1. One of three pairs of claw-like structures located near the mouth on the heads of crustaceans.
• Maximally Exposed IndividualThe person with the highest exposure in a given population.
• Maximize ExtentTo increase to the greatest amount, extent, or degree reasonably possible.
• Maximum Acceptable Toxic Concentration1. For a particular ecological effects test, this term is used to mean either the range between the NOAEL and...
• Maximum Achievable Control Technology1. Generally, the best available control technology, taking into account cost and technical feasibility.
• Maximum Achievable Control Technology ProcessTechnology-based concentration limits developed under CAA to limit emissions of individual constituents from...
• Maximum Allowable Holding Time1. The maximum time that samples may be held, after the sample is taken prior to preparation and/or analysis...
• Maximum Allowable Holding TimesThe maximum amount of time a sample or sample extract can be held prior to processing or analysis. {OW/TSC}
• Maximum Allowable Thinning RatioMaximum volume of thinner that can be added per volume of coating without violating the standards of §...
• Maximum Allowed ConcentrationApplied to BAT effluent limitations and NSPS for drilling fluids and drill cuttings means the maximum...
• Maximum Amount of the EPCRA Section 313 Chemical On-Site at Any Time during the Calendar YearMaximum quantity of the EPCRA Section 313 chemical (e.g., in storage tanks, process vessels, on-site shipping...
• Maximum Annualized Cost ($/yr)A constraint for a control strategy that requires each control measure to have an annualized cost less than...
• Maximum Available Control TechnologyThe emission standard for sources of air pollution requiring the maximum reduction of hazardous emissions...
• Maximum Average Daily Throughput1. Earliest calculation of daily average throughput during the 30-day PTE evaluation period employing...
• Maximum Charge Rate1. For continuous and intermittent HMIWI, 110 percent of the lowest 3-hour average charge rate measured...
• Maximum Contaminant GoalsThe maximum level of a contaminant that is associated with no adverse health effects from drinking water...
• Maximum Contaminant Level1. The maximum level of certain contaminants permitted in drinking water supplied by a public water system as...
• Maximum Contaminant Level Goal1. The maximum level of a contaminant that is associated with no adverse health effects from drinking water...
• Maximum Contaminant Level Goal (regulatory)The maximum level of a contaminant in drinking water at which no known or anticipated adverse effect on the...
• Maximum Contaminant Level (regulatory)1. The maximum permissable level of a contaminant in water which is delivered to any user of a public water...
• Maximum Contaminant LevelsFor purposes of RCRA ground water monitoring, contaminant-specific levels borrowed from SDWA that are the...
• Maximum Continuous Steam FlowMaximum capacity of a boiler as reported in item 3 (Maximum Continuous Steam Flow at 100% Load in thousand...
• Maximum Cost Per Ton ($/ton)A constraint for a control strategy that requires each control measure to have an annualized cost per ton...

1,833 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.