A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z
international Atomic Energy Agency.
Indoor Air Pollution.
Indoor Air Quality.
International Agency for Research on Cancer. One of the three sources that OSHA refers to for data on a material's carcinogenicity. (World Health Organization, Geneva , Switzerland ; distributed in the USA from 49 Sheridan Avenue , Albany , NY 12210 (518) 436-9686).
Interim Air Toxics Data Base.
Industrial Biotechnology Association.
Inductively Coupled Argon Plasma.
International Commission on the Biological Effects of Noise.
Interstate Commerce Commission.
A calculated statistical value whereby a concentration causes inhibition of an effect, behavior, or biological action to 50% of the treated subjects or animals.
Inductively Coupled Plasma.
Inductively Coupled Plasma-Atomic Emission Spectrophotometry.
Ignitability, Corrosivity, Reactivity, Extraction.
Incident Command System
Institute for Chemical Waste Management.
Any chemical or common name which is indicated on the material safety data sheet (MSDS) for the chemical. The identity used shall permit cross-references to be made among the required list of hazardous chemicals, the label and the MSDS.
immediately dangerous to life and health. Used to determine selection of a respirator. The maximum concentration from which one could escape within 30 minutes without any escape-impairing symptoms or irreversible health effects. Also, IDLH conditions and conditions that would lead to an IDLH exposure.
International Environment Bureau.
Integrated Environmental Management Project.
Flocculant/Coagulant - Clarification/Settling (ETUS).
Invitation for Bid.
Industrial Fuel Choice Analysis Model.
Industry File Information System.
Industrial Fugitive Process Particulate.
capable of burning or causing a fire.
the lowest temperature at which a combustible material ignites in air and continues to burn independently of the source of heat.
Acid Type Cheater (ETUS).
Inspection & Maintenance.
IMDG Code, IMO Classification
The IMDG (International Maritime Dangerous Goods) Code assigns divisions, classes, and codes to materials in shipment. These are explosives, flammables, oxidizers, poisons, corrosives, and other regulated substances. The code also assigns labeling and the DOT UN/NA and Pins. (International Maritime Organization, 4 Albert Embankments, London , SE 175R, United Kingdom ).
A hazard with immediate effect(s). See acute health effects.
Immediately dangerous to life and health (IDLH)
the maximum level to which a healthy individual can be exposed to a chemical for 30 minutes and escape without suffering irreversible health effects or impairing symptoms. Used as a” level of concern". (See: level of concern).
Integrated Model of Plumes and Atmosphere in Complex Terrain.
the rate at which a substance absorbs and transmits sound.
describes a material that does not allow another substance to penetrate or pass through it.
Means EPA, or, in the case of a state with a program approved under section 9004 (or pursuant to a memorandum of agreement with EPA), the designated state or local agency responsible for carrying out an approved UST program.
An outline of steps needed to meet environmental quality standards by a set time.
The first business with employees within the Customs Territory of the United States which receives hazardous chemicals produced in other countries for the Purpose of supplying them to distributors or employers within the United States .
A body of water confined by a dam, dike, floodgate, or other barrier.
Interagency Monitoring of Protected Visual Environment.
Refers to a release or the potential for a release of a hazardous material.
Incident Command System
Refers a system to manage the combination of facilities, equipment, personnel, procedures, and communications operating within a common organizational structure with responsibility for the management of assigned resources to effectively accomplish stated objectives pertaining to an incident.
Refers to the individual responsible for the management of all incident operations.
(1) Burning of certain types of solid, liquid or gaseous materials. (2) a treatment technology involving destruction of waste by controlled burning at high temperatures, e.g., burning sludge to remove the water and reduce the remaining residues to a safe, non-burnable ash which can be disposed of safely on land, in some waters or in underground locations.
Incineration at sea
Disposal of waste by burning at sea on specially-designed incinerator ships.
a controlled chamber where waste substances are burned.
describes materials that could cause dangerous reactions and the release of energy from direct contact with one another.
those pollutants which would cause harm to, adversely affect the performance of, or be inadequately treated in publicly owned treatment works.
as defined by section 101(36) of CERCLA, means any Indian tribe, band, nation, or other organized group or community, including any Alaska Native village but not including any Alaska Native regional or village corporation, which is recognized as eligible for the special programs and services provided by the United States to Indians because of their status as Indians.
in biology, an organism, species, or community that shows the presence of certain environmental conditions.
introduction of pollutants from a non- domestic source into a publicly owned waste treatment system Indirect dischargers can be commercial or industrial facilities whose wastes go into the local sewers.
the breathing air inside a habitable structure or conveyance.
indoor air pollution
chemical, physical, or biological contaminants in indoor air.
temperature, humidity, lighting and noise levels in a habitable structure or conveyance. Indoor climate can affect indoor air pollution.
liquid wastes from industrial processes, as distinct from domestic or sanitary wastes.
a vapor that doesn't react with other substances under ordinary conditions.
anything other than the active ingredient in a product; not having active properties. Inert ingredients may be hazardous. For example, the propellant gas in aerosol spray can products such as hair spray is flammable.
a resin with no reactive groups.
a device that uses centrifugal force to separate waste particles.
(1) the penetration of water through the ground surface into sub-surface soil or the penetration of water from the soil into sewer or other pipes through defective joints, connections, or manhole walls. (2) a land application technique where large volumes of waste water are applied to land, allowed to penetrate the surface and percolate through the underlying soil. (See: percolation).
capable of being easily set on fire and continuing to burn, especially violently.
a series of reactions produced in tissue by an irritant, injury, or infection. An influx of blood and fluids causes redness and swelling.
entry of extraneous rain water into a sewer system from sources other than infiltration, such as basement drains, manholes, storm drains, and street washing.
water, wastewater, or other liquid flowing into a reservoir, basin, or treatment plant.
in the Superfund program, a file that contains accurate, up-to-date documents on a Superfund site. The file is usually located in a public building such as a school, library, or city hall that is convenient for local residents.
the taking in of a substance through the mouth for digestion.
the breathing in of a substance in the form of a gas, vapor, fume, mist, or dust.
DOT A chemical that is a liquid having a saturated vapor concentration (ppm) at 68¿F (20¿C) equal to or greater than ten times its LC50 (vapor) value (ppm), if the LC50 value is 1000 parts per million (ppm) or less when administered by continuous Inhalation for 1 hour (or less, if death occurs within I hour) to albino rats weighing between 200 and 300 grams each, provided such concentration, or condition, or both, are likely to be encountered by man when the chemical is used in any reasonable foreseeable manner.
Cooling Water Treatment (ETUS).
a chemical that interferes with a chemical reaction, such as corrosion or precipitation.
a well into which fluids are injected for purposes such as waste disposal, improving the recovery of crude oil, or solution mining.
a geological formation, group of formations, or part of a formation receiving fluids through a well.
for the purposes of classifying the size of discharges, means those waters of the United States in the inland zone, waters of the Great Lakes , and specified ports and harbors on inland rivers.
means the environment inland of the coastal zone excluding the Great Lakes and specified ports and harbors on inland rivers. The term inland zone delineates an area of federal responsibility for response action. Precise boundaries are determined by EPA/USCG agreements and identified in federal regional contingency plans.
Innocent landowner defense
legal defense under Superfund for a person who unknowingly purchase contaminated property after exercising "due diligence" to uncover contamination prior to acquisition.
(1) bacteria placed in compost to start biological action. (2) a medium containing organisms which is introduced into cultures or living organisms.
compounds not containing carbon. Non plant or animal.
chemical substances of mineral origin, not of basically carbon structure.
compounds derived from other than vegetable or animal sources that do not generally contain carbon atoms. Some simple carbon compounds are considered inorganic (i.e., carbides, COx, carbonates, CS2).
a pesticide compound specifically used to kill or control the growth of insects.
refers to treatment of contaminated areas without excavation or other removal, as in the in situ treatment of soils through biodegradation of contaminants.
inspection and maintenance (I/M)
(1) activities to assure proper emissions related operation of mobile sources of air pollutants, particularly automobile emissions controls. (2) also applies to wastewater treatment plants and other anti-pollution facilities and processes.
water use taking place within a stream channel, e.g., hydro-electric power generation, navigation, water-quality.
a measure of exposure expressed as the mass of substance in contact with the exchange boundary per unity body weight per unit time (e.g., mg/kg-day). Also termed the normalized exposure rate.
integrated pest management
combining the best of all useful techniques -- biological, chemical, cultural, physical, and mechanical -- into a custom-made pest control system.
Integrated Risk Information System (IRIS)
IRIS is an EPA data base containing verified RfDs and slope factors and up-to-date health risk and EPA regulatory information for numerous chemicals.IRIS is EPA's preferred source for toxicity information for Superfund.
the collection system that connects main and trunk sewers with the wastewater treatment plant. In a combined sewer system interceptor sewers allow some untreated wastes to flow directly into the receiving streams so the plant won't be overloaded.
the surface between two resins, or resin and a distributor.
interim (permit) status
period during which treatment, storage and disposal facilities coming under RCRA in 1980 are temporarily permitted to operate while awaiting denial or issuance of a permanent permit. Permits issued under these circumstances are usually called "Part A" or "Part B" permits.
a device which will prevent one action from happening while another action is proceeding.
international programmers registry
an international listing service for programmers provided by SOLUTIONS Software Corporation.
scarring of the lungs.
interstate carrier water supply
a source of water for planes, buses, trains, and ships operating in more than one State. These sources are regulated by the Federal Government.
defined by law as: 1) waters that flow across for form a part of State or international boundaries 2) the Great Lakes and 3) coastal waters.
the continuous surveillance of the space between the walls of an underground storage tank.
The administration of a test dose through a tube put or placed into the nose, throat, or larynx.
TSCA inventory of chemicals produced pursuant to Section 8 (b) of the Toxic Substances Control Act.
an atmospheric condition caused by a layer of warm air preventing the rise of cool air trapped beneath it. This holds down pollutants that might otherwise be dispersed, and can cause an air pollution episode.
(1) "in glass"; a test-tube culture. (2) any laboratory test using living cells taken from an organism.
in the living body of a plant or animal. In vivo tests are those laboratory experiments carried out on whole animals or human volunteers.
an atom or radical in solution carrying an integral electric charge, either positive (cation) or negative (anion).
a reversible chemical reaction between a solid (ion exchanger) and a fluid (usually a water solution) by means of which ions may be interchanged from one substance to another. The superficial physical structure of the solid is not affected.
ion exchange treatment
a common water softening method often found on a large scale at water purification plants that remove some organics and radium by adding calcium oxide or calcium hydroxide to increase the pH to a level where the metals will precipitate out.
a measure of the strength of a solution based on both the concentration and valences of the ions present.
a device that detects ionizing radiation.
radiation that can remove electrons from atoms, i.e., alpha, beta, and gamma radiation.
Intraperitoneally. Within the peritoneal cavity. A route of administration.  The material is injected into the peritoneal (abdominal/pelvic) cavity.
International Program on Chemical Safety.
Inhalable Particulate Matter.
Integrated Pest Management.
Implementation Planning Program.
Integrated Plotting Package.
Intermedia Priority Pollutant.
Interim Response Action.
primary irritation dose.
Interagency Review Group.
inflammation of both the eye's iris and its ciliary body.
Instructional Resources Information System.
Integrated Risk Information System.
Inflammation of the iris, the circular pigmented membrane behind the cornea, perforated by the pupil.  EXAMPLE LAY LANGUAGE: Eye irritation.
Interim Remedial Measures.
Inter-Regulatory Risk Management Council.
organisms which are capable of using ferrous iron, either from the water or from steel pipe, in their metabolism and precipitating ferric hydroxide in their sheaths and gelatinous deposits.
Installation Restoration Process.
Installation Restoration Program.
International Register of Potentially Toxic Chemicals.
irritant effects. Any irritant effect on the skin, eye, or mucous membrane.
a noncorrosive material that causes a reversible inflammatory effect on living tissue by chemical action at the site of contact as a function of concentration or duration of exposure.
-DOT A liquid or solid substance which upon contact with fire or when exposed to air gives off dangerous or intensely irritating fumes, such as brombenzylcyanide, chloracetophenone, diphenylaminechlorarsine, and diphenylchlorarsine, but not including any poisonous material, Class A.
food that has been subject to brief radioactivity, usually by gamma rays, to kill insects, bacteria, and mold, and preserve it without refrigeration or freezing.
exposure to radiation of wavelengths shorter than those of visible light (gamma, x-ray, or ultraviolet) for medical purposes, the destruction of bacteria in milk or other foodstuffs, or for inducing polymerization of monomers or vulcanization of rubber.
technique for applying water or wastewater to land areas to supply the water and nutrient needs of plants.
Internal Revenue Service.
Industrial Source Complex.
Interim Status Compliance Letter.
Interim Status Document.
Indirect Source Model for Air Pollution.
chemical compounds with the same molecular weight and atomic composition but differing molecular structure; e.g., n-pentane and 2-methylbutane.
a variation of an element that has the same atomic number but a different weight because of its neutrons.Isotopes of an element may have different radioactive behavior.
refers to observed or identified problems in an organization's performance in the demonstration of exercise objectives.
In Situ Vitrification.
Integrated Solid Waste Management Plan.
Interagency Testing Committee.
International Trade Commission.
Individual Training Plan.
Innovative Technology Requirement.
Injection into a vein.
In-Stream Waste Concentration.