Environment terminology · MLC-0121

Environment terms: P (2,732)

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• Permanently Closed FacilityAny container or facility for which:(1) All liquid and sludge has been removed from each container and...
• Permanently Retired UnitWith regard to a unit, a unit that is unavailable for service and that the unit's owners and operators do not...
• Permeability1. The ease with which water, or other fluid, passes through a substance.
• PermeableHaving pores or openings that allow water to pass through.
• Permeable MaterialHaving pores or openings that allow water to pass through.
• Permeable Reactive Barrier SystemA subsurface emplacement of reactive materials designed as a preferential conduit for treating contaminated...
• permeable reactive barriersA subsurface emplacement of reactive materials designed as a preferential conduit for treating contaminated...
• Permeable RockPermeable materials, such as gravel and sand, allow water to move quickly through them, whereas unpermeable...
• Permeate(PURR-me-ate) To penetrate and pass through, as water penetrates and passes through soil and other porous...
• Permeation EmissionFuel that escapes from the fuel system by diffusing through the walls of fuel-system components.
• Permissible DoseThe dose of a chemical that may be received by an individual without the expectation of a significantly...
• Permissible Exposure Limit1. Workplace exposure limits for contaminants established by OSHA.
• Permissible Exposure Limits1. Standards set by the Occupational, Safety and Health Administration - OSHA. See...
• PermissivenessAllowing establishment of infection or acceptance of graft material.
• Permit1. A legal document issued by state and/or federal authorities containing a detailed description of the...
• Permit ActionRevocation, suspension or termination of all or part of a permit issued under section 102 of the Marine...
• Permit Application1. Final application previously submitted in accordance with the June 15, 1979, section 301(h) regulations...
• Permit Application Form1. EPA standard national forms for applying for a permit, including any additions, revisions or modifications...
• Permit AreaArea of land specified or referred to in an NPDES permit in which active mining and related activities may...
• Permit by Environmental MediumPermits organized by the type of environmental medium.
• Permit Compliance SystemComputerized management information system which contains data on NPDES permit-holding facilities. PCS keeps...
• Permit ComponentsThis refers to the type of discharges from a permitted facility.
• Permit Decision Public RecordNPDES permit application or the NPDES permit itself and the materials comprising the administrative record...
• Permit DocumentPermit applications, draft and final permits, or other documents that include applicable design and...
• Permit Feature Latitude and LongitudeThe horizontal position coordinate (latitude) and vertical position coordinate (longitude) for the point of...
• Permit for Incineration at SeaPermits for incineration of wastes at sea will be issued only as research permits until specific criteria to...
• Permit Modification1. A change to a title V permit as defined in regulations codified in this chapter to implement title V of...
• Permit Process ChangeSignificant permit revision, but only with respect to those pollutant-specific emission units for which the...
• Permit Program1. Comprehensive State operating permit system established pursuant to title V of the Act (42 U.S.C. 7661)...
• Permit Program Cost1. All reasonable (direct and indirect) costs required to develop and administer a permit program, as set...
• Permit RenewalProcess by which a permit is reissued at the end of its term. [40 CFR 70.2 (CFR 2013)]
• Permit Revision1. Any permit modification or administrative permit amendment to a title V permit as defined in regulations...
• Permit ShieldA permit shield can protect a source from enforcement of an applicable requirement under two circumstances...
• Permit TypeThe permit classification in the Water Pollutant Loading Tool. These classifications include the following...
• Permit-as-a-ShieldThe provision which ensures that TSDF permittees will not be enforced against for violating new requirements...
• Permit-by-Rule1. A special form of a RCRA permit that is sometimes granted to facilities with permits for activities under...
• Permits & LicensingPermits and Licensing involves activities associated with granting, revoking, and the overall management of...
• Permitted Capacity105% of the maximum permissible volume output of renewable fuel that is allowed under operating conditions...
• Permitted Discharge FacilityFacility permitted to discharge wastewater directly to surface water under the National Pollution Discharge...
• Permitted EmissionFederally enforceable permit term or condition determined at issuance to be required by an applicable...
• Permitted FacilitiesFacilities that have obtained a TSDF permit from EPA or the state agency to engage in the treatment, storage...
• Permitted Water Dischargers Permit StatusPermit Status reflects the stages in the permit life cycle: Effective: A permit that is in its lifetime...
• Permittee1. Any applicant to whom an experimental use permit has been granted.
• Permittee-Responsible MitigationAquatic resource restoration, establishment, enhancement, and/or preservation activity undertaken by the...
• Permitting AgencyAny agency of the Federal Government to which application is made for a license or permit.
• Permitting Authority1. The United States Environmental Protection Agency (EPA), a Regional Administrator of the Environmental...
• Permitting ProgramsA program conducted by EPA or an approved Federal, state, or local agency that issues an authorization...
• PermittivityThe property which enables a three-dimensional material to store electrical ge; i.e. its capacitivity.
• PeroxidesA group of compounds that contain a bivalent O-O group, i.e., the oxygen atoms are univalent. They can either...
• Peroxisome1. A small, membrane-bounded organelle that uses molecular oxygen to oxidize organic molecules; contains some...
• Peroxisome ProliferationAssociated with hepatocellular carcinomas, Peroxisome Proliferation occurs in epigenetic "non-genotoxic"...
• Perpendicular AccessLegally permissible means of reaching the shore from dry land.
• Persicaria perfoliataMile-a-minute weed, or Asiatic tearthumb, is an herbaceous, annual, trailing vine. Stems are armed with...
• Persistence1. The resistance to degradation as measured by the period of time required for complete decomposition of a...
• Persistence (Microorganism)Ability of the microorganism to survive in the environment of host. [Thesaurus of Terms Used in Microbial...
• Persistent Bioaccumulative and Toxic ChemicalsPBT Contaminants as UF;definition: Chemicals (organic or inorganic) that are persistent in the environment...
• Persistent bioaccumulative and toxic (PBT contaminants)Chemicals (organic or inorganic) that are persistent in the environment, bioaccumulate in food chains, and...
• Persistent LeakLeak that is not intermittent in nature.
• Persistent OilInclude:(1) A petroleum-based oil that does not meet the distillation criteria for a non-persistent oil...
• Persistent OrganicsA group of chemicals that are very resistant to decay. The banned pesticide DDT and PCBs fall into this...
• Persistent PesticidesPesticides that do not break down chemically or break down very slowly and remain in the environment after a...
• PersonAn individual; corporation; company; association; partnership; municipality; or State, federal, or Tribal...
• Person Exempt from ReportingSmall businesses.(2) Persons described in § 704.5(a) and (c).(d) Information to report.
• Person in Charge1. Single individual named master of the vessel or placed in charge of the vessel, by the U.S. Department of...
• Person (Legal Entity)1. Individual, corporation, partnership, association, State municipality, political subdivision of a State...
• Person Who Must Report1. Except as provided in paragraph (c) of this section, the following persons are subject to this section:(1)...
• Personal air monitorAlso known as a low-flow or low-volume sample pump, this is an air sample pump that is portable so that it...
• Personal Air SamplesAir samples taken with a pump that is directly attached to the worker with the collecting filter and cassette...
• Personal Care ProductPersonal care products refer to products used for personal and cosmetic reasons such as soaps, fragrances...
• Personal Cascade Impactor SamplerDesigned to separate and collect airborne PM in specific size ranges, generally referred to as coarse, fine...
• Personal CommunicationPersonal communications may be letters, memos, some electronic communications (e.g., email or messages from...
• Personal Communications ServiceAny of several types of wireless, voice and/or data communications systems, typically incorporating digital...
• Personal ComputerFor WARM's purposes, a PC is composed of a CPU, consisting of housing (mostly steel) and internal electronic...
• Personal InformationPrivacy information related to personnel other than EPA employees.
• Personal MeasurementA measurement collected from an individual's immediate environment.
• PERSONAL PAPERSDocumentary materials belonging to an individual that are not used to conduct agency business. Related solely...
• Personal Privacy InformationIncludes personal information maintained in a Privacy Act system of records.
• Personal Property1. Any property of an insured other than real property (i.e., land and any structures or minerals associated...
• Personal Protective Equipment1. Clothing and equipment worn by pesticide mixers, loaders and applicators and re-entry workers, hazmat...
• Personal Services ContractContract that, by its express terms or as administered, makes the contractor personnel appear to be, in...
• Personal WatercraftVessel less than 4.0 meters (13 feet) in length that uses an installed spark-ignition engine powering a water...
• Personal Watercraft Engine1. Spark-ignition engine used to propel a personal watercraft.
• Persons with DisabilitiesPercent of all persons with disabilities. Considers six disability types: hearing difficulty, vision...
• Pertinent StakeholderInclude, but are not limited to, industry, small businesses, and communities most affected by and/or...
• PervaporationA process in which a liquid stream containing two or more components is placed in contact with one side of a...
• PerviousA porous surface that water is able to penetrate through.
• Pervious PavingPavement composed of a permeable pavement material, which allows distributed infiltration into the underlying...
• Pervious surface1. Porous surface with spaces in the material, such as landscaping, gravel, and alternative pavers. Pervious...
• Pervious WoodA wood through which moisture moves readily.
• Pest1. An insect, rodent, nematode, fungus, weed or other form of terrestrial or aquatic plant or animal life...
• Pest Control OperatorPerson or company that applies pesticides as a business (e.g. exterminator); usually describes household...
• Pest Group Labeling ClaimClaim or statement on the labeling of the pesticide product that the product is effective against a group of...
• Pest ProblemPest infestation and its consequences, or any condition for which the use of plant regulators, defoliants, or...
• Pest Sub-Group Labeling ClaimClaim or statement on the labeling of the pesticide product that the product is effective against a set of...
• Pesticidal ProductPesticide, active ingredient, or device.
• Pesticidal Product AmountQuantity, expressed in weight or volume of the product, and is to be reported in pounds for solid or...
• Pesticidal Product ReportInformation showing the types and amounts of pesticidal products which were: (1) Produced in the past...
• Pesticidal Product TypeEach individual product as identified by: the product name; EPA Registration Number (or EPA File Symbol, if...
• Pesticidal PropertyCharacteristic exhibited by a microorganism that contributes to the intentional use of the microorganism to...
• Pesticidal SubstanceSubstance that is intended to be produced and used in a living plant, or in the produce thereof, for a...
• Pesticide1. Substances intended to repel, kill, or control any species designated a "pest" including weeds, insects...
• Pesticide Active Ingredient1. Any material that is an active ingredient within the meaning of FIFRA section 2(a); that is used to...
• Pesticide Active Ingredient AmountWeight or volume of the pesticide or active ingredient used in producing a pesticide expressed as weight for...
• Pesticide Active Ingredient Manufacturing Process UnitProcess unit that is used to produce a material that is primarily used as a PAI or integral intermediate. A...
• Pesticide Active Ingredient Process UnitUnit designed for the PAI process, which includes all, or a combination of, reaction, recovery, separation...
• Pesticide Active Ingredients TreatmentIn-plant treatment to control pesticide active ingredients including activated carbon, chemical oxidation...
• Pesticide and Other Agricultural Chemical ManufacturingThis industry comprises establishments primarily engaged in the formulation and preparation of agricultural...
• Pesticide ApplicationDispersal of a pesticide on, in, at, or directed toward a target site. [40 CFR 171.2 (CFR 2017)]
• Pesticide ApplicatorAny individual using a restricted use pesticide. An applicator may be certified as a commercial or private...
• Pesticide Applicator Certification1. Recognition by a certifying agency that a person is competent and thus authorized to use or supervise the...
• Pesticide ApplyingDispersal of a pesticide on, in, at, or directed toward a target site. [40 CFR 171.2 (CFR 2017)]
• Pesticide by ActionPesticides classified by their action type, e.g. attractant, desiccant, fumigant, etc.
• Pesticide by Pest ClassificationPesticides classified by the type of pest they are used to control.
• Pesticide by UsePesticides classified by their regulated uses.
• Pesticide CarrierThe inert liquid or solid material in a pesticide product that serves as a delivery vehicle for the active...
• Pesticide ChemicalSpecified in FFDCA section 201(q)(1), as amended, except as provided in § 180.4.
• Pesticide Chemical Active IngredientSum of all active ingredients manufactured at each facility covered by this part.
• Pesticide Chemical CodeA six-digit number assigned by OPP to identify pesticide chemicals. Also called a Shaughnessy code. The PC...
• Pesticide Chemical ResidueMeaning specified in FFDCA section 201(q)(2), as amended, except as provided in § 180.4.(n) [40 CFR 180.1...
• Pesticide Compatibility1. That property of a pesticide which permits its use with other chemicals without undesirable results being...
• Pesticide Compatible ContainerThe container construction materials will not chemically react with the formulation. A container is not...
• Pesticide ContainerAny package, can, bottle, bag, barrel, drum, tank, or other containing-device (excluding any application...
• Pesticide Dealership1. Any site owned or operated by a restricted use pesticide retail dealer where any restricted use pesticide...
• Pesticide Device1. Any device or class of devices as defined by the Act and determined by the Administrator pursuant to...
• Pesticide DischargeAn unintended environmental release of a pesticlde.
• Pesticide Discharge from Pesticide ApplicationDischarges that result from the application of biological pesticides, and the application of chemical...
• Pesticide Dispensing AreaArea in which pesticide is transferred out of or into a container.
• Pesticide Document Management SystemThe EPA-maintained collection of documents of regulatory significance to pesticides, including submitted...
• Pesticide Document Management System BibliographyA list of citations of selected PDMS documents and/or studies, usually for a single pesticide active...
• Pesticide Drift ReductionA combination of targeted technologies designed to apply active ingredients in the necessary areas without...
• Pesticide ExposureExposure to any number of substances used as herbicides, insecticides or rodenticides.
• Pesticide Formulating Packaging and Repackaging ManufacturerPesticide formulating, packaging and repackaging facility that also performs pesticide manufacturing on-site...
• Pesticide Handler1. A pesticide handler is anyone who:is employed (including self-employed) for any type of compensation by an...
• Pesticide Handler EmployerAny person who is self-employed as a handler or who employs any handler, for any type of compensation.
• Pesticide HandlersRefers to individuals who mix, load, apply, or otherwise handle pesticides.
• Pesticide Organic Active IngredientCarbon-containing active ingredients used in pesticides, excluding metalloorganic active ingredients.
• Pesticide PackagingImmediate container or wrapping, including any attached closure(s), in which the pesticide is contained for...
• Pesticide Performance StandardBenchmark or reference against which the efficacy of the pesticide is compared (including, but not limited...
• Pesticide PersistenceThe relative ability of a pesticide to remain active over a period of time.
• Pesticide Producer1. Any person, as defined by the Act, who produces any pesticide, active ingredient, or device (including...
• Pesticide Product1. Pesticide in the particular form (including composition, packaging, and labeling) in which the pesticide...
• Pesticide Product Formulation1. Process of mixing, blending or diluting one or more pesticide active ingredients (PAIs) with one or more...
• Pesticide Product Registrant1. Any person who holds, or ever held, a registration for a pesticide product issued under FIFRA section 3 or...
• Pesticide Products Repackaging1. Enclosing or placing a formulated pesticide product into a marketable container.
• Pesticide Purposes ValueThat characteristic of a substance or mixture of substances which produces an efficacious action on a pest.
• Pesticide RegistrationIncludes a new registration, amended registration and reregistration, unless stated otherwise.
• Pesticide Registration & ReregistrationPesticide registration is the process through which EPA examines the ingredients of a pesticide; the site or...
• Pesticide Regulation NoticeFormal notice to pesticide registrants about important changes in regulatory policy, procedures, regulations.
• Pesticide Residue1. A film of pesticide left on the plant, soil, container, equipment, handler, etc. after application of the...
• Pesticide Residue Established LevelTolerance, temporary tolerance, food additive regulation, action level, or other limitation on pesticide...
• Pesticide Risk AssessmentActivity to accurately identify the risks of new and existing pesticides and accurately characterize these...
• Pesticide SourceDonor of the genetic material that encodes a pesticidal substance or leads to the production of a pesticidal...
• Pesticide Spray DriftDrift from pesticide spraying operations.
• Pesticide ToleranceThe amount of pesticide residue allowed by law to remain in or on a harvested crop. EPA sets these levels...
• Pesticide Treated AreaAny area to which a pesticide is being directed or has been directed.
• Pesticide UsageRefers to actual applications of pesticides, generally in terms of quantity applied or units treated.
• Pesticide Use1. Use of a pesticide (described in terms of the application site and other applicable identifying factors)...
• Pesticide User ExpendituresDollar value of purchases by persons or businesses applying pesticides, such as farmers, commercial pesticide...
• Pesticide-Producing Establishment (FIFRA)All pesticides used in the U.S. must be registered by EPA through the Federal Insecticide, Fungicide, and...
• Pesticides1. Substances or mixture there of intended for preventing, destroying, repelling, or mitigating any pest...
• Pesticides ManagementRegulation of the manufacture, use and sale of Pesticides by EPA and state governments.
• Pesticides ProductionTo manufacture, prepare, propagate, compound, or process any pesticide, including any pesticide produced...
• Pesticides Risk AssessmentActivities to accurately identify the risks of new and existing pesticides and accurately characterize these...
• Pesticides Risk ManagementActivities to identify cost effective requirements to ensure the safe use of pesticides through regulatory...
• Pesticides Risk MitigationActivities to support clear understanding and effective use and control practices by pesticides applicators...
• Pest-Resistant CropPlants with the ability to withstand, deter or repel pests and thereby prevent them from damaging the plants...
• Pest-Specific Labeling ClaimClaim or statement on the labeling of the pesticide product that the product is effective against a...
• Pet AnimalAnimals kept by humans for companionship and enjoyment, as opposed to domestic animals such as livestock or...
• PET Manufacturing by Dimethyl Terephthalate ProcessManufacturing of PET based on the esterification of dimethyl terephthalate with ethylene glycol to form the...
• PET Manufacturing by Terephthalic Acid ProcessManufacturing of PET based on the esterification reaction of terephthalic acid with ethylene glycol to form...
• PetioleLeaf stalk.
• Petition For No Further Action Receipt DateReceipt by the Agency of a permit modification requested by the RCRA facility to eliminate any remaining...
• Petitioner1. Any person who submits a petition under this regulation requesting disclosure of a chemical identity...
• Petrocalcic HorizonThe petrocalcic horizon is an illuvial horizon in which secondary calcium carbonate or other carbonates have...
• Petrochemical1. Chemicals obtained by refining (i.e., distilling) crude oil. They are used as raw materials in the...
• Petrochemical feedstock1. Feedstock derived from petroleum, used principally for the manufacture of chemicals, synthetic rubber, and...
• Petrochemical OperationProduction of second-generation petrochemicals (i.e., alcohols, ketones, cumene, styrene, etc.) or first...
• PetrochemicalsChemicals obtained by refining (i.e., distilling) crude oil. They are used as raw materials in the...
• Petrogypsic HorizonThe petrogypsic horizon is an illuvial horizon, 10 cm or more thick, in which secondary gypsum has...
• Petroleum1. Crude oil or any fraction thereof that is liquid under normal conditions of temperature and pressure. The...
• Petroleum Administration for Defense DistrictThese districts are the same as the PADDs used by other federal agencies, except for the addition of PADDs VI...
• Petroleum and Coal Products ManufacturingThe Petroleum and Coal Products Manufacturing subsector is based on the transformation of crude petroleum and...
• Petroleum BrownfieldsAbandoned or underutilized industrial and commercial properties where redevelopment is complicated by real or...
• Petroleum CargoProducts of the fractionation or straight distillation of crude oil, redistillation of unfinished petroleum...
• Petroleum coke1. A residue that is the final product of the condensation process in cracking.
• Petroleum DerivativesChemicals formed when gasoline breaks down in contact with ground water.
• Petroleum Dry CleanerDry cleaning facility that uses petroleum solvent in a combination of washers, dryers, filters, stills, and...
• Petroleum Fuel1. Fuel primarily derived from crude oil (e.g., gasoline or diesel fuel).
• Petroleum hydrocarbonsA large family of several hundred chemical compounds that are derived from crude oil. Some chemicals that may...
• Petroleum Liquid1. Petroleum, condensate, and any finished or intermediate products manufactured in a petroleum refinery but...
• Petroleum OilPetroleum in any form, including but not limited to crude oil, fuel oil, mineral oil, sludge, oil refuse, and...
• Petroleum ProductAll refined and semi-refined products that are produced at a refinery by processing crude oil and other...
• Petroleum ProductsPetroleum is defined under CERCLA as "crude oil or any fraction thereof which is not otherwise specifically...
• Petroleum Products Combustion EmissionEmission caused by the burning of gasoline and diesel fuels, primarily in internal combustion engines. The...
• Petroleum Refinery1. Industrial plants as classified by the Department of Commerce under Standard Industrial Classification...
• Petroleum RefiningPetroleum refining processes and operations can be separated into five basic areas: Petroleum refining begins...
• Petroleum Refining FacilityEstablishment primarily engaged in producing gasoline, kerosene, distillate fuel oils, residual fuel oils...
• Petroleum Refining Process Unit1. Process unit used in an establishment primarily engaged in petroleum refining as defined in NAICS code...
• Petroleum Resource TypeA collective term for oil, gas, natural gas liquids, and tar.
• Petroleum SolventHydrocarbon based solvents
• Petroleum Underground Storage Tank SystemUnderground storage tank system that contains petroleum or a mixture of petroleum with de minimis quantities...
• Petroleum-Equivalent Fuel EconomyValue, expressed in miles per gallon, that is calculated for an electric vehicle in accordance with 10 CFR...
• Petroleum-Powered AccessoryVehicle accessory (e.g., a cabin heater, defroster, and/or air conditioner) that: (1) Uses gasoline or diesel...
• Peyer PatchLymphoid cell tissue in the small intestinal mucosa.
• PFASPFAS, Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic chemicals that have been in use...
• pH1. The measure of acidity or alkalinity of a chemical solution, from 0-14. Anything neutral, for example, has...
• pH Adjusting AgentSpecifically the substance used to adjust the pH of the fluid used in hydraulic fracturing. Overall there are...
• pH AdjustmentAdjustment of the basic or acid condition of a liquid; pH may range from 0 to 14, where 0 is the most acid...
• pH Homeostasis1. pH homeostasis is one of numerous control systems that are involved in keeping the body's internal milieu...
• pH paperPaper that changes color to show the pH of a substance.
• pH scaleThe range of units that indicate whether a substance is acidic, basic, or neutral. The pH scale ranges from 0...
• PhageA virus that infects bacteria. Many phages have proved useful in the study of molecular biology and as...
• Phagocyte1. An immune system cell that can surround and kill microorganisms and remove dead cells. Phagocytes include...
• Phagocytosis1. The process by which phagocytes engulf and digest microorganisms and cellular debris; an important defense...
• Pharmaceutic AidSubstances which are of little or no therapeutic value, but are necessary in the manufacture, compounding...
• PharmaceuticalCompounds manufactured for use as medicinal drugs.
• Pharmaceutical and Medicine ManufacturingThis industry comprises establishments primarily engaged in one or more of the following: (1) manufacturing...
• Pharmaceutical and Personal Care ProductRefers, in general, to any product used by individuals for personal health or cosmetic reasons or used by...
• Pharmaceutical Formulation OperationMixing, compounding, blending, and tablet coating.
• Pharmaceutical Manufacturing OperationFacilitywide collection of PMPU and any other equipment such as heat exchanger systems, wastewater and waste...
• Pharmaceutical Manufacturing Process Unit1. Process, as defined in this subpart, and any associated storage tanks, equipment identified in §...
• Pharmaceutical Mixing Compounding and FormulatingProcesses that put pharmaceutical products in dosage forms.
• Pharmaceutical PreparationDrugs intended for human or veterinary use, presented in their finished dosage form. Included here are...
• Pharmaceutical PreservativeSubstance added to pharmaceutical preparations to protect them from chemical change or microbial action...
• Pharmaceutical Product1. Any of the following materials, excluding any material that is a nonreactive solvent, excipient, binder...
• Pharmaceutical VehicleA carrier or inert medium used as a solvent (or diluent) in which the medicinally active agent is formulated...
• Pharmaceuticals1. Compounds manufactured for use as medicinal drugs.
• Pharmaceuticals & Personal Care Products • Plastics Definition: Non-metallic chemoreactive compounds molded into rigid or pliable construction materials, fabrics, etc. [Terms of Env] • Shopping Bags • Batteries • Cleaning Products • Light Bulbs • Paints • Paper <input type='checkbox' class='include' name='results[2].includeInReport'/> <input name='results[2].uid' value='1003839' type='hidden' /> • CorrosivesDefinition: Substance that adds inorganic or organic plant nutrients to soil and improves its ability to grow...
• Pharmaceuticals and Personal Care ProductsRefers, in general, to any product used by individuals for personal health or cosmetic reasons or used by...
• Pharmaceuticals ExtractionProcess operations that derive pharmaceutically active ingredients from natural sources such as plant roots...
• Pharmaceuticals Producing MicroorganismOrganisms which produce biological products such as vaccines and insulin
• PharmacodynamicsThe determination and quantification of the sequence of events at the cellular and molecular levels leading...
• Pharmacokinetic EffectProcesses that effect the level of a drug in the body.
• pharmacokinetic model1. A model that can be used to predict the time course of absorption, distribution, metabolism, and excretion...
• Pharmacokinetics1. The dynamic behavior of chemicals inside biological systems; it includes the processes of uptake...
• Pharmacologic SubstanceAny substance, other than food, that is used to prevent, diagnose, treat or relieve symptoms of a disease or...
• Pharyngeal MuscleThe muscles of the pharynx, the inferior, middle and superior constrictors, salpingopharyngeus, and...
• Pharynx1. The muscular membrane sac between the mouth and nostrils and the esophagus
• Phase 1 EngineAny handheld or nonhandheld engine, that was produced under a certificate of conformity issued under the...
• Phase 2 EngineAny handheld and nonhandheld engine that was produced under a certificate of conformity under the regulations...
• Phase 2 Engine Eligible ProductionPhase 2 engines produced for purposes of being used in the United States, and includes any engine exported...
• Phase ChangeA change in the physical state of matter
• phase constructionDisturbance of small portions of a site at a time to prevent erosion from the dormant parts.
• Phase contrast microscopy1. Light-enhancing microscope technology that employs an optical mechanism to translate small variations in...
• Phase I DetoxificationA process in which the liver uses one of two major enzyme pathways to change a toxic substance, such as an...
• Phase I Environmental AssessmentA Phase I environmental assessment is an initial environmental investigation that is limited to a historical...
• Phase I Preliminary AssessmentPhase 1 Preliminary Assessment Report Completion Date(s) are the dates(s) on which any Phase I reports (e.g...
• Phase I UnitAny affected unit, except an affected unit under part 74 of this chapter, that is subject to an Acid Rain...
• Phase II AssessmentPhase II Report Completion date(s) are the date(s) on which any Phase II reports (e.g., supplement...
• Phase II DetoxificationA process in which the liver uses one of two major enzyme pathways to change a toxic substance, such as an...
• Phase II Environmental AssessmentA Phase II environmental assessment is an investigation that includes tests performed at the site to confirm...
• Phase II Existing Facility1. An existing facility, as defined in § 125.93, is a Phase II existing facility subject to this subpart if...
• Phase II studyCommon nomenclature for the part of an environmental investigation that first involves on-site activities...
• Phase II UnitAny affected unit, except an affected unit under part 74 of this chapter, that is subject to an Acid Rain...
• Phase III Cleanup PlanningPhase III Report Completion Date(s) are the date(s) on which any Phase III reports (e.g., cleanup planning)...
• Phase shiftA measure of the offset between two periodic signals of the same frequency. Measured in degrees or...
• Phased ApproachUnder the phased approach to TMDL development, LAs and WLAs are calculated using the best available data and...
• Phased DisposalMethod of uranium byproduct material or tailings management and disposal which uses lined impoundments which...
• Phellodendron amurenseAmur corktree is a deciduous tree named for its thick corky bark (from Greek: phellos for cork and dendron...
• PhenanthrenePolynuclear aromatic hydrocarbons reported as phenanthrene.
• PhenethylaminesA group of compounds that are derivatives of beta- aminoethylbenzene which is structurally and...
• Phenol-Formaldehyde ResinResin that consists primarily of phenol and formaldehyde and does not contain urea-formaldehyde.
• Phenolic Compounds(FEE-noll-LICK) Organic compounds that are derivatives of benzene.
• Phenolic InsulationInsulation made with phenolic plastics which are plastics based on resins made by the condensation of...
• Phenolic ResinThermoset resin that is a condensation product of formaldehyde and phenol, or a formaldehyde substitute...
• Phenology1. The timing of natural events, such as flower blooms and animal migration, which is influenced by changes...
• Phenolphthalein Alkalinity1. (FEE-nol-THAY-leen) The alkalinity in a water sample measured by the amount of standard acid required to...
• Phenols1. Organic compounds that are byproducts of petroleum refining, tanning, and textile, dye, and resin...
• Phenotypic AnalysisThe analysis is based on a trait that is expressed.
• Phenotypic PlasticityThe ability of an organism to adapt to a changing environment through the manipulation of its phenotype...
• Phenotypic PolymorphismOccurrence of more than one form of a physical characteristic in a population
• Phenylalanine1. An essential aromatic amino acid that is a precursor of melanin, dopamine, noradrenalin (norepinephrine)...
• PheromonesBiochemicals used to disrupt the mating behavior of insects
• PhiloptatryThe tendency of species or groups to remain in or habitually return to their native regions or territories...
• PhloemVascular tissue that conducts synthesized foods through the plant, located adjacent to the outside of the...
• Phosphatases1. An enzyme that accelerates the hydrolysis and synthesis of organic esters of phosphoric acid and the...
• Phosphate ConversionPhosphate conversion coatings are formed by immersing a metal part in a dilute solution of phosphoric acid...
• Phosphate KilnType of enclosed industrial furnace that produces clean phosphoric acid and aggregate co-product.
• Phosphate Rock FeedAll material entering the process unit, including moisture and extraneous material as well as the following...
• Phosphate Rock PlantAny plant which produces or prepares phosphate rock product by any or all of the following processes: Mining...
• Phosphate-Free Soaps, Cleaners, and DetergentsAny substance or mixture of substances which contain, by weight, 0.5% or less of phosphates or derivatives of...
• Phosphates1. Certain chemical compounds containing phosphorus.
• Phosphatidylcholine BiosynthesisThe major pathway for the biosynthesis of phosphatidylcholine occurs via the CDP-choline pathway. Choline...
• Phosphogypsum PilesPrincipal byproduct generated in production of phosphoric acid from phosphate rock. These piles may generate...
• Phospholipid BindingPhospholipid Interaction involves the molecular interaction between a phospholipid molecule and a...
• Phospholipid MetabolismPhospholipid Metabolism involves anabolic and catabolic biochemical changes made to phospholipids.
• PhospholipidsLipids containing one or more phosphate groups, particularly those derived from either glycerol...
• Phosphonic Acid SaltSalt of alkyl or aryl derivatives of phosphorus trihydroxide (P(OH)3) and its tautomeric form...
• Phosphor DepositionApplication of a phosphorescent coating to a part. Wastewater generated in this unit operation includes water...
• Phosphoric AcidInorganic derivatives of phosphoric acid (H3PO4).
• Phosphorus1. A type of nutrient contributing to the Bay's poor water quality. While phosphorus is vital to plant life...
• Phosphorus Mini-FlushProcess of flushing elemental phosphorus, which has solidified in the secondary condenser, to the elevated...
• Phosphorus PlantsFacilities using electric furnaces to produce elemental phosphorous for commercial use, such as high grade...
• Phosphorus (pollutant category)Pollutant grouping that includes phosphorus and phosphate pollutant parameters.
• PhosphorylationThe covalent attachment of a phosphate group to a molecule.
• Phosphorylation InhibitionPhosphorylation Inhibition involves interference with, or restraint of, the enzymatic creation of a phosphate...
• Phosphorylation Process1. The creation of a phosphate derivative of an organic molecule. This is usually achieved by transferring a...
• Phosphotransferases1. A rather large group of enzymes comprising not only those transferring phosphate but also diphosphate...
• Photic zone1. The layer of water that sunlight is able to penetrate through and reach plants growing underwater.
• Photo Image DevelopingOperation in which a water-based solution is used to develop the exposed circuitry in a photoresist-laden...
• Photo ImagingProcess of exposing a photoresist-laden printed wiring board to light to impact the circuitry design to the...
• PhotoautotrophOrganisms, plants with chlorophyll, and some bacteria that photosynthesize
• PhotobiontThe photosynthetic partner of a lichen.
• Photocatalytic Solar DisinfectionA water purification process used as an intervention against waterborne diseases.
• Photochemical Assessment Monitoring StationPhotochemical assessment monitoring stations.
• Photochemical ModelingPhotochemical modeling is computer modeling of reactions in the atmosphere that produce ozone from nitrogen...
• Photochemical OxidantAir pollutants formed by the action of sunlight on oxides of nitrogen and hydrocarbons.
• Photochemical OxidantsAir pollutants formed by the action of sunlight on oxides of nitrogen and hydrocarbons.
• Photochemical Smog1. Air pollution caused by chemical reactions of various pollutants emitted from different sources.
• PhotocurrentElectric current induced by radiant energy.
• PhotodecarbonylationRemoval of a carboxyl radical through a photochemical reaction.
• Photoelectric CellDevice for measuring light intensity that works by converting light falling on, or reach it, to electricity...
• PHOTOGRAPHAn image recorded on light-sensitive material.
• Photograph CoatingCoating designed and labeled exclusively to be applied to finished photographs to allow corrective...
• Photographic Article1. Any article which will become a component of an instant photographic or peel-apart film article.
• Photographic Laboratory DrainsThe laboratory wastewater resulting from processing of photographic film.
• Photographic ProductArticles developed or printed by photographic processes, such as paper prints, slides, negatives...
• PHOTOGRAPHIC RECORDSRecords taking the form of pictures, or photographs, sometimes with related textual records.
• Photolysis1. The degradation of a contaminant by chemical reactions catalyzed by light.
• Photon1. A discrete “packet” of electromagnetic energy, that has no mass and exhibits properties of both particles...
• Photo-OxidationLight-caused oxidation
• PhotophobiaAbnormal visual intolerance of light
• PhotophosphorylationIn plants: ATP formation in chloroplasts during photosynthesis.
• Photoresist ApplicationOperation that uses heat and pressure to apply a photoresist coating to a printed wiring board. Water is not...
• Photoresist StrippingRemoving organic photoresist material from a printed wiring board using an acid solution.
• Photorespiration MetabolismThe removal of O2 from the atmosphere by Rubisco and the subsequent biochemical reactions that serve to...
• PhotosensitizeTo induce a state of abnormal responsiveness to the influence of light
• Photosynthesis1. The manufacture by plants of carbohydrates and oxygen from carbon dioxide mediated by chlorophyll in the...
• Photosynthesis Dark ReactionLight-independent photosynthetic reactions which fix carbon dioxide as carbohydrates
• Photosynthesis Light ReactionLight-dependent photosynthetic reactions which conserve the energy from light
• Photosynthetic Carbon Reduction CycleThe biochemical reactions, initiated by Rubisco, that result in the reduction of CO2 to a carbohydrate.
• Photosynthetic Electron TransferRedox reactions in the thylakoid membranes of chloroplasts which transfer electrons from an electron donor to...
• Photosynthetic MembraneA bilayer of lipid molecules in which are embedded proteins that transform light energy into chemical free...
• Photosynthetic Process1. The synthesis of carbohydrates from carbon dioxide and water by chlorophyll using light as energy and...
• Photosynthetic StramenopilesA common name (but used formally) for a group of organisms that are mostly kinds of algae including...
• Photosynthetic SystemNatural photosynthetic system in which solar energy is biologically converted to chemically stored forms of...
• Photosynthetically Active RadiationEnergy in the visible light region of the electromagnetic spectrum (400 - 700 nanometer wavelength) that...
• Photosystem IA protein complex located in the photosynthetic membrane. Photosystem I is one of two types of reaction...
• Photosystem IIA protein complex found in the photosynthetic membrane. Photosystem II is one of two types of reaction...
• Phototrophic ProcessA process by which phototrophic organisms use sunlight as their primary energy source. Contrasts with...
• phototrophsOrganisms that use light to generate energy (by photosynthesis) for cellular activity, growth, and...
• PhototropismThe directional growth of organisms in response to light. In plants, aerial shoots usually grow towards...
• Photovoltaic1. A system that converts sunlight directly into electricity using cells made of silicon or other conductive...
• Photovoltaic and solar thermal energyEnergy radiated by the sun as electromagnetic waves (electromagnetic radiation) that is converted into...
• Photovoltaic ArrayAn interconnected system of PV modules that function as a single electricity-producing unit. The modules are...
• Photovoltaic cell1. A device that converts energy from sunlight into electricity. Photovoltaic cells use a material such as...
• Photovoltaic CellsPhotovoltaic cells are designed and engineered to convert solar radiation into usable energy. They are...
• Photovoltaic DeviceA solid-state electrical device that converts light directly into direct current electricity of...
• Photovoltaic EffectThe phenomenon that occurs when photons, the "particles" in a beam of light, knock electrons loose from the...
• Photovoltaic ModuleThe smallest environmentally protected, essentially planar assembly of solar cells and ancillary parts, such...
• Photovoltaic SystemA complete set of components for converting sunlight into electricity by the photovoltaic process, including...
• Photovoltaic-Thermal SystemA photovoltaic system that, in addition to converting sunlight into electricity, collects the residual heat...
• PHPPHP is an HTML-embedded scripting language. Much of its syntax is borrowed from C, Java and Perl with a...
• PhragmitesCommon reed, or Phragmites, is a tall, perennial grass that can grow to over 15 feet in height. In North...
• Phragmites australisCommon reed, or Phragmites, is a tall, perennial grass that can grow to over 15 feet in height. In North...
• phreatic surfaceThe free surface of groundwater at atmospheric pressure.
• Phreatic Water1. Water found below the surface of the land, usually in porous rock formations. Ground water is the source...
• phreatophyte1. A plant that obtains its water supply from the zone of saturation or through the capillary fringe and is...
• PhthalatesA class of organic compounds containing phthalic acid esters [C6H4(COOR)2] and derivatives. Used as...
• Phthalates ExposureExposure to a class of organic compounds containing phthalic acid esters [C6H4(COOR)2] and derivatives.
• PhycobilisomeLight-harvesting protein aggregates in some algae.
• PhycobiontThe algal partner in a lichen
• Phylloplane FungusFungi inhabiting the leaves of a plant
• PhylogeographyReconstruction of biogeographic relationships, usually among populations within a species, by identifying the...
• Physical AddressWith respect to a United States parent company as defined in this section, means the street address, city...
• Physical AnalysisStudy of the properties and characteristics of a body or substance through the techniques of physics, e.g...
• Physical and Chemical TreatmentProcesses generally used in large-scale wastewater treatment facilities. Physical processes may include...
• Physical ConstructionExcavation, movement of earth, erection of forms or structures, or similar activity to prepare an HWM...
• Physical GeographyPhysiography, or geography that deals with the exterior physical features and changes of the earth.
• Physical HazardNon-ionizing radiation (ultraviolet, visible, infrared, microwave, radiofrequency, electric power, lasers)...
• Physical LayerThe physical layer consists of the hardware resources that are necessary to support the cloud services being...
• Physical ModelRepresentation of an object or system which is built from tangible, material components; opposed to...
• Physical, not elsewhere classified (treatment technology category)Physical wastewater treatment not elsewhere classified, including stripping, coagulation/flocculation...
• Physical or Mental Impairment1. Any physiological disorder or condition, cosmetic disfigurement, or anatomical loss affecting one or more...
• Physical Pollutant ModelModel describing material pollutants such as dust, smoke and their interactions.
• Physical ScienceThe sciences dealing with processes observable in nature.
• Physical SecurityInformation related to the protection of federal buildings, grounds, or property.
• Physical Security Information - BasicPhysical Security Information is information related to the protection of federal facilities, grounds...
• Physical Separation TechnologyThe following types of physical separation technologies may be applicable to contaminated sediments: Debris...
• Physical Vapor Deposition1. A method of depositing thin semiconductor photovoltaic films. With this method, physical processes, such...
• Physicochemical ProcessPhysical reactions involved in the formation of or changes in the structure of atoms and molecules and their...
• Physicochemical propertiesThe inherent physical and chemical properties of a molecule such as boiling point, density, physical state...
• Physicochemical TransformationTransformation in the environment refers to a change in a chemical or physical state.
• PhysiographicThe natural, physical form of the landscape.
• Physiographic regionGeographic region in which climate and geology have given rise to an array of landforms different from those...
• PhysiographyPhysical geography, or geography that deals with the exterior physical features and changes of the earth.
• Physiologic ResolutionReturn to the normal structure and/or function, e.g. the subsidence of a pathologic process, as the...
• PhysiologicalThe biological processes of a plant or animal; how things work and interact within a body, rather than just...
• Physiological ResponseMeasure of physical change or damage in a species as a result of exposure to a contaminant.
• Physiologically Based Pharmacokinetic Model1. A model that estimates the dose to a target tissue or organ by taking into account the rate of absorption...
• Physiologically-based pharmacokinetic modelingPBPK modeling is an approach for predicting the absorption, distribution, metabolism and excretion of a...
• Physiology1. (The study of) the biological processes of a plant or animal; how things work and interact within a body...
• phytechnologyA term referring to technologies that use living plants.
• PhytoestrogensPlant extracts and compounds, primarily isoflavones, that mimic or modulate endogenous estrogens, usually by...
• Phytoplankton1. Very tiny, often microscopic, plants found in fresh and saltwater. Phytoplankton drift near the surface of...
• PhytoplasmaVery small bacteria that are enveloped only by a single membrane and do not possess a cell wall like typical...
• Phytoplasmal Diseases(Diseases caused by) phytoplasmas which are parasites and pathogens of plants and insects. All known...
• Phytoremediation1. Low-cost remediation option for sites with widely dispersed contamination at low concentrations.
• Phytotoxic1. The term phytotoxic is used to describe a substance that is harmful to plants.
• PhytotreatmentThe cultivation of specialized plants that absorb specific contaminants from the soil through their roots or...
• Pica1. Pica behavior is the repeated eating of non-nutritive substances, whereas soil-pica is a form of soil...
• Pickling BathAny chemical bath (other than alkaline cleaning) through which a workpiece is processed.
• Pickling Fume ScrubberProcess of using an air pollution control device to remove particulates and fumes from air above a pickling...
• Pickling RinseRinse, other than an alkaline cleaning rinse, through which a workpiece is processed. A rinse consisting of a...
• Pickup TruckNonpassenger automobile which has a passenger compartment and an open cargo bed.
• Picnic TableRecreational furniture found in parks, outdoor recreational facilities, and the grounds of office buildings...
• PicoA prefix used in the metric system and other scientific systems of measurement which means 10-12 or...
• Picocurie1. A measure of radioactivity. One picocurie of radioactivity is equivalent to 0.037 nuclear disintegrations...
• picocurie per literA unit of radioactivity corresponding to one decay every 27 seconds in a volume of one liter, or 0.037 decays...
• picocuriesOne-trillionth (1/1,000,000,000,000) of a Curie.
• Picocuries Per Liter1. A unit of measure for levels of radon gas; becquerels per cubic meter is metric equivalent.
• Picture ElementThe smallest dot, or image element, that can be processed individually for display on a video screen. Often...
• Piece of Evidence1. A specific data analysis or observation that relates to a type of evidence. For example, the type of...
• PiedmontUplands or hill country located above the fall line. Rivers and streams in the Piedmont region are not...
• Pierce's DiseaseXylella fastidiosa causes Citrus Variegated Chlorosis Disease in Brazil and Pierce's Disease of grapevines in...
• Pierce-Smith ConverterBatch copper converter in which copper matte is oxidized to form blister copper by a process that is...
• piezoconeA type of CPT cone that incorporates a pressure transducer to measure hydrostatic pressure.
• piezometer1. A nonpumping well, generally of small diameter, which is used to measure the elevation of the water table...
• piezometer nestA set of two or more piezometers set in close proximity to one another but screened at different depths. This...
• piezometric headHydrostatic pressure in an aquifer, relative to a common datum, such as mean sea level. The piezometric head...
• PigTerm usually applied to young, immature swine.
• Pigeon Breeder's LungA respiratory disorder due to an acquired hypersensitivity to the dust of bird droppings. (MSH2003_2003_05_12)
• Piglet1. The offspring of a male boar and a female sow are called piglets, or just pigs.
• PigmentProvides color to the paint or coating.
• Pigmented MaterialContaining finely ground insoluble powder used to provide one or more of the following properties: color...
• Pigtail1. Short section of piping, usually one to two feet long, which can be bent and used for connections between...
• Piles (Other)A term reserved for a pile of indeterminate origin that contains hazardous substances.
• PilotA pretest or trial run of a program, evaluation instrument, or sampling procedure for the purpose of...
• Pilot field programA collection of pilot projects whose objectives are to provide the scientific information required prior to a...
• Pilot GasGas introduced into a flare tip that provides a flame to ignite the flare vent gas.
• Pilot project1. A research project that requires field work to meet a stated research project quality objective, and the...
• Pilot Test1. Preliminary test or study of the program or evaluation activities to try out procedures and make any...
• Pilot TestsTesting a cleanup technology under actual site conditions to identify potential problems prior to full-scale...
• pilotsApproved tests of a new initiative or idea to identify potential problems prior to full-scale implementation...
• Pilot-Scale OperationProcessing equipment being operated at an intermediate stage between laboratory-scale and full-scale...
• P-I-NA semiconductor photovoltaic (PV) device structure that layers an intrinsic semiconductor between a p-type...
• PinalesThe conifers
• Pinch-outThe location where a porous, permeable formation that is located between overlying and underlying confining...
• Pine NeedleLong, slender leaf found on loblolly pines and other evergreens.
• Pine SavannahA type of ecosystem dominated by a canopy of tall, longleaf pines. The terrain is flat to gently rolling with...
• Pine savannahsA type of ecosystem dominated by a canopy of tall, longleaf pines. The terrain is flat to gently rolling with...
• Pineal Gland1. A light-sensitive neuroendocrine organ attached to the roof of the third ventricle of the brain. The...
• Pineapple ProcessingProcessing of pineapple into the following product styles: Canned, peeled, sliced, chunk, tidbit, diced...
• Ping-Pong MechanismNon-sequential binding of substrates in enzyme reactions where a product is made and released before the...
• PinusThe genus containing the pines. Pines are conifers.
• Pinus ponderosaPonderosa pine is a rapid growing tree with the ability to firmly anchor into most soil types. For this...
• Pinus strobusThe eastern white pine
• Pioneer RoadTemporary access ways used to facilitate construction equipment access when building permanent roads.
• Pioneer roadsTemporary access ways used to facilitate construction equipment access when building permanent roads.
• PipeHollow cylinder or tubular conduit that is constructed of non-earthen materials. Pipeline facilities...
• Pipe and Tube MillSteel hot forming operations that produce butt welded or seamless tubular steel products.
• Pipe IDPipe identifier for an effluent sample.
• Pipe ProductBonded wool fiberglass insulation manufactured on a flame attenuation manufacturing line and having a loss on...
• Pipe ScaleMinerals that build up inside pipes used to pump water in and out of the well and in storage tanks is called...
• Pipe, Tube and Other PicklingAcid pickling operations that pickle pipes, tubes or any steel product other than those included in...
• Pipeline1. A stainless steel or glass pipe used for transporting milk.
• Pipeline AreaCorridor through which one or more pipelines have been placed.
• Pipeline Breakout StationA facility along a pipeline containing storage vessels used to relieve surges or receive and store gasoline...
• Pipeline FreightRefers to freight carried through pipelines, including natural gas, crude oil, and petroleum products...
• Pipeline InterconnectPhysical injection or withdrawal point where RNG is injected or withdrawn into or from the natural gas...
• Pipeline InterfaceThe mixture between different fuels and products that abut each other during shipment by a refined petroleum...
• Pipeline Natural GasNaturally occurring fluid mixture of hydrocarbons (e.g., methane, ethane, or propane) produced in geological...
• Pipeline OperatorAny person who owns, leases, operates, controls, or supervises a pipeline that transports fuel, fuel...
• Pipeline Pumping Station1. Typical (oil) pump station configurations involve at least three pumps connected to the pipeline in...
• Pipeline SystemFacilities through which gas or oil is transported.
• Pipeline TransportationInterstate and intrastate onshore and offshore pipeline systems, including pumps and related appurtenances...
• PipingHollow cylinder or tubular conduit that is constructed of non-earthen materials. Pipeline facilities...
• PiscivorA fish-eating animal.
• PiscivoreA fish-eating animal (bird, mammal, reptile, amphibian, or other fish).
• PiscivorousA fish-eating animal.
• piston samplerSealed soil sampling tool that uses an internal piston to seal the tool while it is pushed or driven to the...
• Pit1. A contained unit usually with concrete walls in which liquid or semi-liquid manure is stored.
• Pit FlareIgnition device, installed horizontally or vertically and used in oil and natural gas production operations...
• pit lake1. A lake that forms within the open pit of a mining operation.
• Pitch1. Residue from the distillation of petroleum or coal tar.
• Pitch Storage TankAny fixed roof tank that is used to store liquid pitch that is not part of the paste production plant.
• Pitch Working TankTank that is used for heating pitch to the impregnation temperature, typically between 150° and 260 °C (300°...
• Pitch-Bonded Refractory ProductFormed refractory product that is manufactured using pitch as a bonding agent. Pitch-bonded refractory...
• Pitcher Filter1. Filtration insert for water pitchers that removes lead in drinking water, and that is certified to remove...
• Pitch-Impregnated Refractory ProductRefractory shape that has been fired in a kiln, then impregnated with heated coal tar or petroleum pitch...
• pitot tubea device used to measure the total pressure of a fluid stream that is essentially a tube attached to a...
• Pituitary Gland1. The main endocrine gland. It produces hormones that control other glands and many body functions...
• Pituitary HormonePituitary hormones are produced by the pituitary gland, the master gland of the endocrine system which is...
• Pituitary Hormone Receptor BindingA process that involves the binding of any member of the group of pituitary hormones, including growth...
• Pituitary-Adrenal SystemThe interactions between the anterior pituitary and adrenal glands, in which corticotropin (ACTH) stimulates...
• Pixel1. Short for "picture element." A pixel is the smallest resolvable point of a raster image. It is the basic...
• Place-Based Risk AssessmentA risk assessment for a particular geographic location, such as a superfund site or a specific watershed are...
• Place-based risk assessmentsA risk assessment for a particular geographic location, such as a superfund site or a specific watershed are...
• Placebo1. Any dummy medication or treatment. Although placebos originally were medicinal preparations having no...
• Placed into Service1. Put into initial use for its intended purpose. [40 CFR 1036.801 (CFR 2013)][40 CFR 1037.801 (CFR 2013)][40...
• PlacentaA highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and...
• placerA mineral deposit that has achieved its present distribution through the prior action of moving water or...
• Placer Deposit1. Mineral deposits consisting of dense, resistant and often economically valuable minerals which have been...
• Placer MiningPlacer mining is a special opencut method for exploiting deposits of sand or gravel containing workable...
• Places of Worship1. Point locations for buildings used for religious worship (e.g., chapel, mosque, synagogue, tabernacle, or...
• Placic HorizonThe placic horizon (Gr. base of plax, flat stone; meaning athin cemented pan) is a thin, black to dark...
• Plagiarism1. Misrepresenting someone else’s creative work (e.g. words, methods, pictures, ideas, or data) as one’s own.
• PlainA region of general uniform slope, comparatively level and of considerable extent.
• Plain tap waterExcludes tap water consumed in the form of juices and other beverages containing tap water.
• plan of operations1. A plan for mining exploration or development on BLM land involving more than 5 acres or a plan for mining...

2,732 of 30,736 terms in Environment terminology (MLC-0121). Request the full dataset.