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
Electric Arc Furnace.
Environmental Action Plan.
Extended Binary Coded Decimal Interchange Code.
Emergency Broadcast System
Environmental Criteria and Assessment Office.
(median) effective concentration. The concentration of a material in water, a single dose of which is expected to cause a biological effect on 50% of a group of test animals.
Electron Capture Detector.
Environmental Chemical Laboratory.
Executive Control Language.
Economic Commission for Latin America.
Escherichia coli, one of the members of the coliform group of bacteria indicating fecal contamination.
the total effect of an environmental change, natural or man-made, on the community of living things.
the relationships of living things to one another and to their environment, or the study of such relationships.
chemicals used to control pests and to defoliate cash crops such as cotton.
a heat exchanger in a furnace stack that transfers heat from the stack gas to the boiler feedwater.
the "bio-bubble" that contains life on earth, in surface waters, and in the air. (See biosphere).
the interacting system of a biological community and its nonliving surroundings.
Environmental Cleanup Responsibility Act.
Effective dose. The calculated dose, derived experimentally, which would produce a specified effect in 50 percent of the test population.
Economic Development Administration.
Emergency Declaration Area.
Environmental Defense Fund.
Enforcement Document Retrieval System.
an abnormal accumulation of clear, watery fluid in body tissue.
Electronic Data Interchange. Efforts have been underway to develop a standard for the transmission format for MSDS within the context of an EDI environment.
Ethylenediaminetetraacetic acid. The sodium salt is the usual form of this chelating material.
a device that by flow of water through it creating a vacuum, draws a solution into the water stream.
Energy and Environmental Analysis.
European Economic Community.
Environmental Engineers and Management Institute.
Exercise Evaluation Report.
Earthquake Engineering Resources Institute.
Environmental Emergency Response Unit.
Environment and Energy Study Institute.
Environmental Ecological and Support Laboratory.
water and quantities, rates and concentrations of chemical, physical, biological and other constituents which are discharged from point sources.
restrictions established by a State or EPA on quantities, rates, and concentrations in wastewater discharges.
Exhaust Gas Recirculation.
Extremely Hazardous Air Pollutant.
Environmental Health Committee.
Emission History Information System.
Extremely Hazardous Substance.
Economic Impact Assessment.
Environmental Impact Assessment.
Environmental Impairment Liability.
European Inventory of Existing Chemical Substances.
Endangerment Information Report.
Environmental Impact Report.
Environmental Impact Statement.
Environmental Inventory System.
Emissions Inventory System/Area Source.
Emerging Issues Task Force.
Empirical Kinetic Modeling Approach.
Electrode Cleaner (ETUS).
property which allows an electric current to flow when a potential difference is applied. It is the reciprocal of the resistance in ohms measured between opposite faces of a centimeter cube of an aqueous solution at a specified temperature. It is expressed as microohms per centimeter at temperature degrees Celsius.
means underground equipment that contains dielectric fluid that is necessary for the operation of equipment such as transformers and buried electrical cable.
conductive materials, placed in water solution, which have a positive or negative charge.
a process that uses electrical current applied to permeable membranes to remove minerals from water. Often used to desalinize salt or brackish water.
a nonmetallic substance that conducts an electric current in solution by the movement of ions rather than electrons.
where the positive charges equal the negative charges.
electrostatic precipitator (ESP)
an air pollution control device that removes particles from a gas stream (smoke) after combustion occurs. The ESP imparts an electrical charge to the particles, causing them to adhere to metal plates inside the precipitator. Rapping on the plates causes the particles to fall into a hopper for disposal.
the construction costs for wastewater treatment works upon which EPA grants are based.
Environmental Law Reporter.
the process of extracting one solid from another. Often used incorrectly to describe the regeneration of an ion exchanger.
the washing of a sludge with water to free it of its mother liquor.
Enforcement Management and Accountability System.
obstruction of a blood vessel by a transported clot, a mass of bacteria, etc.
an organism in the early stages of development before birth. In humans, the developing child is considered an embryo from conception to the end of the second month of pregnancy.
a material harmful a a developing embryo at a concentration that has no adverse effect on the pregnant female.
Emergency Management Director
emergency classification level
refers to a designated level describing the general characteristics of a emergency resulting from a incident/accident of a hazardous material.
a situation created by an accidental release or spill of hazardous chemicals which poses a threat to the safety of workers, residents, the environment, or property.
see air pollution episode.
Emergency Management Director
refers to the individual responsible for the management of the emergency response away from the incident/accident site.
Emergency Operations Center
refers to where department heads, government officers and officials, and volunteer disaster agencies gather to coordinate their response to an emergency.
refers to the initial phase of response actions, during which actions are taken in response to a threat of a release or a release in progress.
an agent that induces vomiting.
Early Money Is Like Yeast: it raises more money.
government taking-or forced acquisition-of private land for public use, with compensation paid to the landowner.
pollution discharged into the atmosphere from smoke- stacks, other vents, and surface areas of commercial or industrial facilities; from residential chimneys; and from motor vehicle, locomotive, or aircraft exhausts.
the relationship between the amount of pollution produced and the amount of raw material processed. For example, an emission factor for a blast furnace making iron would be the number of pounds of particulates per ton of raw materials.
an irreversibly diseased lung condition in which the alveolar walls have lost their resiliency, resulting in an excessive reduction in the lungs' capacity.
an emulsion stabilizer (soap in case of oil and water).
a colloidal dispersion of one liquid in another.
a heterogeneous system consisting of at least one immiscible liquid dispersed in another in the form of microscopically visible droplets.
like effluent but used in regard to air pollution.
the relationship between the amount of pollution produced and the amount of raw material processed. For example, an emission factor for the blast furnace making iron would be the number of pounds of particulates per ton of raw materials.
a listing, by source, of the amounts of air pollutants discharged into the atmosphere of a community daily. It is used to establish emission standards.
the maximum amount of discharge legally allowed from a single source, mobile or stationary.
EPA policy that allows a plant complex with several facilities to decrease pollution from some facilities while increasing it from others, so long as total results are equal to or better than previous limits. Facilities where this is done are treated as if they exist in a bubble in which total emissions are averaged out.Complexes that reduce emissions substantially may "bank" their "credits" or sell them to other industries.
A lung condition where It becomes difficult to exhale.This condition may be due to mucus plugging passage ways or air trapped in the lungs due to loss of elasticity of lining tissues.
OSHA defines as a person engaged in a business where chemicals are either used, distributed, or are produced for use or distribution. Including a contractor or subcontractor.
Environmental Management Report.
Emergency Medical Services
Enforcement Management System.
Environmental Monitoring Support Laboratory.
Environmental Monitoring Systems Laboratory.
Environmental Monitoring Testing Site.
a study conducted to determine the nature and extent of contaminations at a site on the National Priorities List and the risk posed to public health or the environment. EPA or the state conduct the study when a legal action is to be taken to direct potentially responsible parties to clean up a site or pay for the cleanup. An endangered assessment supplements a remedial investigation.
animals, birds, fish, plants, or other living organisms threatened with extinction by man-made or natural changes in their environment. Requirements for declaring a species endangered are contained in the Endangered Species Act.
a preselected value or measurement used to determine when the service cycle is completed or that a breakthrough has occurred.
EPA, state, or local legal actions to obtain compliance with environmental laws, rules, regulations, or agreements and/or obtain penalties or criminal sanctions for violations.Enforcement procedures may vary, depending on the specific requirement of different environmental laws and related implementing regulatory requirements. Under CERCLA, for example, EPA will seek to require potentially responsible parties to clean up a Superfund site, or pay for the cleanup, whereas under the Clean Air Act the agency may invoke sanctions against cities failing to meet ambient air quality standards that could prevent certain types of construction or federal funding. In other situations, if investigations by EPA and state agencies uncover willful violations, criminal trials and penalties are sought.
enforcement decision document (EDD)
a document that provides an explanation to the public of EPA's selection of the cleanup alternative at enforcement sites on the National Priorities List. Similar to a Record of Decision.
engineering control systems reduce potential hazards by isolating the worker from the hazard or by removing the hazard from the work environment. Methods include ventilation, isolation, and enclosure. This is preferred over personal protective equipment.
sewage effluent or agricultural runoff adding nutrients (nitrogen, phosphorus, carbon compounds) to a water body, greatly increasing the growth potential for algae and aquatic plants.
the total heat content of a body.
the transport of water into a gas stream. In a boiler, this is carryover, in a cooling tower, drift.
a mathematical expression applying to the limits to the availability of energy; a measure of the random motion of matter.
the sum of all external conditions affecting the life, development and survival of an organism. As defined by section 101(8) of CERCLA, means the navigable waters, the waters of the contiguous zone, and the ocean waters of which the natural resources are under the exclusive management authority of the United States under the Magnuson Fishery Conservation and Management Act; and any other surface water, ground water, drinking water supply, land surface or subsurface strata, or ambient air within the United States or under the jurisdiction of the United States.
a written environmental analysis which is prepared pursuant to the National Environmental Policy Act to determine whether a federal action would significantly affect the environment and thus require preparation of a more detailed environmental impact statement.
1. an independent assessment of the current status of a party's compliance with applicable environmental requirements. 2. an independent evaluation of a party's environmental compliance policies, practices, and controls.
environmental impact statement
a document required of Federal agencies by the National Environmental Policy Act for major projects or legislative proposals. They are used in making decisions about the positive and negative effects of the undertaking, and list alternatives.
environmental response team
EPA experts located in Edison, NJ, and Cincinnati, OH, who can provide around-the-clock technical assistance to EPA regional offices and states during all types of emergencies involving hazardous waste sites and spills of hazardous substances.
technology as applied to environmental management, also: tradename for ETUS, Inc.
as applied to water, a chemical produced by living cells having the ability to reduce large organic molecules to units small enough to diffuse through the cell membrane.
Emergency Operations Center
Explosion Ordnance Disposal.
Equal Opportunity Employer.
Emergency Operations Team.
U.S. Environmental Protection Agency; primary federal agency responsible for enforcement of federal laws protecting the environment.
EPA, (Canada) Environmental Protection Act
Federal legislation, administered by Environment Canada, designed to protect the environment.
Environmental Programs Assistance Act.
EPA Acquisition Regulations.
EPA Chemical Activities Status Report.
Energy Policy and Conservation Act.
Emergency Planning and Community Right-to-Know Act; also known as SARA Title III.
Environmental Policy Institute.
Environmental Priorities Initiative.
Environmental Photographic Interpretation Center.
widespread outbreak of a disease, or a large number of cases of a disease in a single community or relatively small area.
the study of diseases as they affect population, including the distribution of disease, or other health- related states and events in human populations, the factors (e.g. age, sex, occupation, economic status) that influence this distribution, and the application of this study to control health problems.
excessive flow of tears.
an air pollution incident in a given area caused by a concentration of atmospheric pollution reacting with meteorological conditions that may result in a significant increase in illnesses or deaths. Although most commonly used in relation to air pollution, the term may also be used in connection with other kinds of environmental events such as a massive water pollution situation.
Estuarine Programs Office.
Electric Power Research Institute.
Extraction Procedure Toxicity Characteristic.
Extraction Procedure Toxicity Test.
an expression of a reaction using chemical symbols.
equalization (continuous flow)
balancing of flow or pollutant load using a holding tank for a system that has widely varying inflow rates.
in relation to radiation, the state at which the radioactivity of consecutive elements within a radioactive series is neither increasing nor decreasing.
any method of sampling and analyzing for air pollution which has been demonstrated to the EPA Administrator's satisfaction to be, under specific conditions, an acceptable alternative to the normally used reference methods.
equivalent per million
a unit of concentration used in chemical calculations, calculated by dividing the concentration in ppm or mg/L by the equivalent weight.
the weight in grams of a substance which combines with or displaces one gram of hydrogen; it is usually obtained by dividing the formula weight by the valence.
Economic Regulatory Agency.
Environmental Radiation Ambient Monitoring System.
Environment Reporter Cases.
Environmental Research Center.
Emergency Response Cleanup Service.
Energy Research and Development Administration.
Environmental Research, Development, and Demonstration Authorization Act.
the study of human characteristics for the appropriate design of living and work environments.
Environmental Research Laboratory.
Emergency Response Notification Systems.
the wearing away of land surface by wind or water.Erosion occurs naturally from weather or run-ff but can be intensified by land-clearing practices related to farming, residential or industrial development, road building, or timber-cutting.
Environmental Response Team.
abnormally red skin from capillary congestion.
Endangered Species Act.
Environmental Site Assessment.
Environmentally Sensitive Area.
Endangered Species Committee.
Electron Spectroscopy for Chemical Analysis.
Energy Supply and Environmental Coordination Act.
Environmental Safety and Health.
areas where fresh water meets salt water (bays, mouths of rivers, salt marshes, lagoons). These brackish water ecosystems shelter and feed marine life, birds and wildlife.
regions of interaction between rivers and nearshore ocean waters, where tidal action and river flow create a mixing of fresh and salt water. These areas may include bays, mouths of rivers, salt marshes, and lagoons. These brackish water ecosystems shelter and feed marine life, birds, and wildlife. (See: wetlands).
Evaluation Team Director
Ethylene Dibromide (EDB)
a chemical used as an agricultural fumigant and in certain industrial processes. Extremely toxic and found to be a carcinogen in laboratory animals.
all of the factors that contribute to the cause of a disease or an abnormal condition.
Emissions Trading Policy.
one of the worlds leading environmental technology organizations. Located at 1511 Kastner Drive, Sanford, Florida 32771 USA, Tel:(407)321-7910, Fax:(407)321-3098.
Environmental Use Permit.
the slow aging process of a lake evolving into a marsh and eventually disappearing. During eutrophication the lake is choked by abundant plant life. Human activities that add nutrients to a water body can speed up this action.
shallow murky water bodies that have excessive concentrations of plant nutrients causing excessive algal production. (See: dystropic lakes).
the slow aging process during which a lake, estuary, or bay evolves into a bog or marsh and eventually disappears. During the later stages of eutrophication the water body is choked by abundant plant life as the result of increased amounts of nutritive compounds such as nitrogen and phosphorus. Human activities can accelerate the process.
refers to the material that the ETD provides to each evaluator so that he is fully aware of his responsibilities in the exercise.
refers to the evaluators, controllers, and team and group leaders assigned to evaluate a hazardous materials exercise.
refers to those persons assigned to each major playing element to observe the exercise and gather data. Their primary role is to observe actions taken by players and to record their observations.The evaluators' efforts provide the major portion of the documentation necessary to critique the exercise and produce an exercise report.The evaluators may also assist the controllers in keeping the exercise on track, but will not interfere with the players in the performance of their duties.
Evaporator Odor Control (ETUS).
areas where sewage sludge is dumped and allowed to dry out.
the rate at which a material vaporizes (volatilizes, evaporates) from the liquid or solid state when compared to a known material's evaporation rate. The evaporation rate can be useful in evaluating a material's health and fire hazards. The known material is usually normal butyl acetate (N-BuAc or n-BuAc), with a vaporization rate designated as 1.0. Vaporization rates of other solvents or materials are then classified as (1) FAST evaporating if greater than 3.0 e.g., methyl ethyl ketone (MEK), 3.8; acetone, 5.6; hexane, 8.3; (2) MEDIUM evaporating if 0.8 to 3.0, e.g., 190-proof (95%) ethyl alcohol, 1.4; VM&P naphtha, 1.4; MIBK, 1.6; (3) SLOW evaporating if less than 0.8 e.g., ethylene, 0.6; isobutyl alcohol, 0.6; normal butyl alcohol, 0.4; water, 0.3; mineral spirits, 0.1.
the loss of water from the soil both by evaporation and by transpiration from the plants growing in the soil.
means the volume containing the tank system and backfill material bounded by the ground surface, walls, and floor of the pit and trenches into which the UST system is placed at the time of installation.
violation of environmental protection standards by exceeding allowable limits or concentration levels.
a patented form of stabilized Chlorine Dioxide used to treat potable and industrial waters, inhibit bacterial growth, improve taste, sanitize and control odor. It also has uses in the reduction of Cyanide and the break down of Phenols. EPA registration No. 9150-3. EPA establishment No. 9150-R.I.- 58700H1.
Exceeding the usual, proper, or normal. As distinguished from words such as immoderate and inordinate, excessive implies an amount or degree too great to be reasonable or acceptable.
excess capacity factor
a multiplier on process size to account for shutdown for cleaning and maintenance.
reactive groups on an ion exchange resin.
any form of zoning ordinance that tends to exclude specific classes of persons or businesses from a particular district or area.
specific organic compounds that are not subject to requirements of regulation because they have been deemed by EPA to be of negligible photochemical reactivity.
underground bodies of water defined in the Under- ground Injection Control program as aquifers that are sources of drinking water (although they are not being used as such) and that are exempted from regulations barring underground injection activities.
refers to a set of general rules on how the exercise will be conducted. Many of the same ground rules may apply in all hazardous materials exercises. Exercise rules define the role and authority of the chief controller(s), other controllers, exercise evaluators, and players. Other rules for exercise conduct may include safety guidelines or information on pertinent State or local laws or regulations that may affect exercise participants and their play. The rules may also include procedures for when and how to terminate an exercise and for giving precedence to real emergencies.
refers to a sequential, narrative account of a hypothetical incident or accident. The scenario provides the catalyst for the exercise and is intended to introduce situations which will inspire responses, and thus allow demonstration of the exercise objectives. Most scenarios are initiated with an accident resulting in a release of, or the potential for a release of, a hazardous material.
existing tank system
means a tank system used to contain an accumulation of regulated substances or for which installation has commenced on or before December 22, 1988. Installation is considered to have commenced if: (a) the owner or operator has obtained all federal, state, and local approvals or permits necessary to begin physical construction of the site or installation of the tank system; and if, (b)(1) either a continuous on-site physical construction or installation program has begun; or,(2) the owner or operator has entered into contractual obligations--which cannot be canceled or modified without substantial loss--for physical construction at the site or installation of the tank system to be completed within a reasonable time.
giving off heat in a reaction or solution of a substance.
-OSHA A chemical that causes a sudden, almost instantaneous release of pressure, gas, and heat when subjected to sudden shock, pressure, or high temperature.-DOT An explosive is defined as any chemical compound, mixture, or device, the primary or common purpose of which is to function by explosion, i.e., with substantially instantaneous release of gas and host, unless such compound, mixture, or device is otherwise specifically classified by DOT.
The range of concentration of a flammable gas or vapor by volume in air) in which explosion can occur upon ignition in a confined area. The boundary-line mixtures of vapor or gas with air, which, if ignited will just propagate the flame. They are known as the "lower and upper or explosive limits," and are usually expressed In terms of percentage by volume of gas or vapor in air. 
the amount of radiation or pollutant present in an environment which represents a potential health threat to the living organisms in that environment.
contact of an organism with a chemical or physical agent. Exposure is quantified as the amount of the agent available at the exchange boundaries of the organism (e.g., skin, lungs, gut) and available for absorption.
the determination or estimation (qualitative or quantitative) of the magnitude, frequency, duration, and route of exposure.
an incident of contact with a chemical or physical agent. An exposure event can be defined by time (e.g., day, hour) or by the incident (e.g., eating a single meal of contaminated fish).
the concentration in workplace air of a chemical thought acceptable. This means that most workers can be exposed at the given levels or lower without harmful effects. The exposure limits in common use are (1) TLV-TWA (threshold limit value - time-weighted average); (2) STEL (short-term exposure limit) or STEV (short-term exposure value); (3) C (ceiling value).
the course a chemical or physical agent takes from the source to the exposed organism. An exposure pathway describes a unique mechanism by which an individual or population is exposed to chemicals or physical agents at or originating from the site. Each exposure pathway includes a source or release from a source, an exposure point, and an exposure route. If the exposure point differs from the source, a transport/exposure medium (e.g., air) or media (in cases of intermedia transfer) also is included.
a point of potential contact between an organism and a chemical or physical agent.
exposure point concentration
the concentration of a chemical at the exposure point.
the way a chemical or physical agent comes in contact with an organism (i.e., by ingestion, inhalation, or dermal contact.)
extent of play
refers to the extent to which the objective will be demonstrated through the completion of response actions corresponding to those that would be accomplished in a real emergency.
extinguishing media, agents
the type of fire extinguisher or extinguishing method appropriate for a specific material. Some chemicals react violently in the presence of water, so other methods such as the use of foam or COà should be followed.
extending information beyond the point where proven data is available.
extremely flammable liquid
Any liquid having a flash point below 20¿F (-6.7¿C), unless the liquid is a mixture having components that constitute 99 percent or more of the liquid by volume and that have flash points of 20¿F or greater.
extremely hazardous substances
any of 406 chemicals identified by EPA on the basis of toxicity, and listed under SARA Title III. The list is subject to revision.
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