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Bottle Bill- Proposed or enacted legislation which requires a returnable deposit on beer or soda containers and provides for retail store or other redemption centers. Such legislation is designed to discourage use of throwaway containers. They are especially valuable for wildlife breeding and nesting and habitat areas. Under the bubble concept, sources can control more than required at one emission point where control costs are relatively low in return fora comparable relaxation of controls at a second emission point where costs are higher.
Emissions Trading Buffer Strips- Strips of grass or other erosion-resisting vegetation between or below cultivated strips or fields.
The VOCs are later recovered from the carbon. The affinity of hemoglobin for CO is about times greater than for oxygen. In recreation management, the amount of use a recreation area can sustain without deterio- ration of its quality. In wildlife management, the maximum number of animals an area can support during a given period of the year. Also called a coffin. Catalytic incinerators require lower temperatures than conventional thermal incinerators, with resultant fuel and cost savings. The test methodology is the same as for BODS, except that nitrogen demand is suppressed.
In solid waste disposal, holes where waste is dumped, compacted, and covered with layers of dirt on a daily basis. The smallest structural part of living matter capable of functioning as an independent unit. Used especially in photoelectric cells. A flood-reduction or marsh- drainage tactic that can interfere with waste assimilation capacity and disturb fish and wildlife habitats.
Among them are DDT, aldrin, dieldrin, heptachlor, chlor- dane, lindane, endrin, mirex, hexachloride, and toxaphene. Other examples include TCE, used as an industrial solvent.
Chronic RfDs are specifically developed to be protective for long-term exposure to a compound 7 years to lifetime. This is often aided by centrifugal action and chemically induced coagulation in wastewater. The term "cleanup" is sometimes used interchangeably with the terms remedial action, removal action, response action, or corrective action. Under certain soil and slope conditions it can contribute sediment to water pollution. This term has assumed a more general meaning that includes making copies of a gene.
It is often induced by chemicals such as lime, alum, and iron salts. Their presence in water indicates fecal pollution and potentially dangerous bacterial contamination by disease causing microorganisms.
Normally, its entire flow goes to a waste treatment plant, but during a heavy storm, the storm water volume may be so great as to cause overflows. When this happens, untreated mixtures of storm water and sewage may flow into receiving waters. Storm-water runoff may also carry toxic chemicals from industrial areas or streets into the sewer system. A basic cause of air pollution. Used in both solid waste management and wastewater treatment.
Specific community relations activities are required in relation to Superfund remedial actions. Controlled methods of composting include mechanical mixing and aerating, ventilating the materials by dropping them through a vertical series of aerated chambers, or placing the compost in piles out in the open air and mixing or turning it periodically.
These special circumstances include a finding by the EPA Administrator that a new product or use of an existing pesticide will not significantly increase the risk of unreasonable adverse effects. A product containing a new previously unregistered active ingredient may be conditionally registered only if the Administrator finds that such conditional registration is in the public interest, that a reasonable time for conducting the additional studies has not elapsed, and the use of the pesticide for the period of conditional registration will not present an unreasonable risk.
The consent decree describes the actions PRPs will take and may be subject to a public comment period. Also, soil that contains the minute skeletons of certain algae that scratches and dehydrates waxy-coated insects.
May or may not equal the reported quantitation limit of a given chemical in a given sample. These may be in the form of organic waste, sediment, acid, bacteria and viruses, nutrients, oil and grease, or heat.
Although costs are one important consideration, when regulatory and compliance methods are being considered, such analysis does not require EPA to choose the least expensive alternative. For example, when selecting a method for cleaning up a site on the Superfund National Priorities List, the Agency balances costs with the long term effectiveness of the various methods proposed.
This is in contrast to slab-on-grade or basement construction houses. These factors are used to determine limits on allowable concentration levels and to limit the number of violations per year.
When issued by EPA, the criteria provide guidance to the states on how to establish their standards. EPA has identified and set standards to protect human health and welfare for six pollutants: The term, "criteria pollutants" derives from the requirement that EPA must describe the characteristics and potential health and welfare effects of these pollutants. It is on the basis of these criteria that standards are set or revised. With regard to indoor air, refers to the amount of air, in cubic feet, that is exchanged with indoor air in a minute's time, or an air exchange rate.
Da ta Call-In is an adjunct of the Registra tion Standards program intended to expedite reregistration and involves the "calling in" of data from manufacturers.
It has a half-life of fifteen years and can collect in fatty tissues of certain animals. EPA banned registration and interstate sale of DDT for virtually all but emergency uses in the United States in because of its persistence in the environment and accumulation in the food chain.
In general, a sound doubles in loudness for every increase of ten decibels. It changes the chemical makeup and physical appearance of materials. Degradatiot The process by which a chemical is reduced to a less complex form. A depletion curve can be drawn for base flow, direct runoff, or total flow.
Depressurizatiot A condition that occurs when the air pressure inside a structure is lower that the air pressure outside. Depressurization can occur when household appliances that consume or exhaust house air, such as fireplaces or furnaces, are not supplied with enough makeup air. Radon- containing soil gas may be drawn into a house more rapidly under depressurized conditions. Residues in meat are thought to be carcinogenic. The Clean Air Act does require states to control these pollutants, which include acid mist, total reduced sulfur TRS , and fluorides.
Uses can include cold water fisheries, public water supply, agriculture, etc. Some contain compounds which kill useful bacteria and encourage algae growth when they are in wastewater that reaches receiving waters. Developmental RfDs are used to evaluate the effects of a single event generally one day exposure. In , EPA banned its use on open areas such as sod farms and golf courses because it posed a danger to migratory birds who gathered on them in large numbers.
The ban did not apply to its use in agriculture, or on lawns of homes and commercial establishments. Differentiation The process by which single cells grow into particular forms of specialized tissue, e.
It affects the ability of the stream to assimilate waste. EPA, in , proposed restrictions on its use when laboratory tests found it caused birth defects in rabbits. It was banned by EPA in because it posed the risk of birth defects and sterility. Concern about them arises from their potential toxicity and contaminants in commercial products. Tests on labora- tory animals indicate that it is one of the more toxic man-made chemicals known.
Chlorine is often used to disinfect sewage treatment effluent, water supplies, wells, and swimming pools. Disposal may be accomplished through use of approved secure landfills, surface impoundments, land farming deep well injection, ocean dumping, or incineration. Dissolved oxygen is vital to fish and other aquatic life and for the prevention of odors. Traditionally, the level of dissolved oxygen has been accepted as the single most important indicator of a water body's ability to support desirable aquatic life.
Secondary and advanced waste treatment are generally designed to protect DO in waste receiving waters. Excessive amounts make water unfit to drink or use in industrial processes.
Distillation The act of purifying liquids through boiling, so that the steam condenses to a pure liquid and the pollutants remain in a concentrated residue. Viruses, too, can contain RNA. This process takes advantage of the ability of a single strand of DNA to combine with a complimentary strand. Dose is calculated from the intake and the absorption efficiency, and it usually is expressed as mass of a substance absorbed into the body per unit body weight per unit time e.
Also, in radiology, the quantity of energy or radiation absorbed. From the quantitative dose-response relationship, toxicity values are derived that are used in the risk characterization step to estimate the likelihood of adverse effects occurring in humans at different exposure levels. This disturbs the ecosystem and causes silting that can kill aquatic life. Dredging of contaminated muds can expose aquatic life to heavy metals and other toxics. Dredging activities may be subject to regulation under Section of the Clean Water Act.
Generally refers to wastes discharged into surface waters. Often used to desalinize salty or brackish water.
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. For example, an emission factor for a blast furnace ma king iron would be the number of pounds of particulates per ton of raw materials. It is used to establish emission standards. Facilities where this is done are treated as if they exist in a bubble in which.
Complexes that reduce emissions substantially may "bank" their "credits" or sell them to other industries. 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. Requirements for declaring a species endangered are contained in the Endangered Species Act. Enforcement procedures may vary, depending on the specific requirements 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. Similar to a Record of Decision. This process greatly increases the growth potential for algae and aquatic plants.
An independent assessment of the current status of a party's compliance with applicable environmental requirements. An independent evaluation of a party's environmental compliance policies, practices, and controls. A tool for decision making, it describes the positive and negative effects of the undertaking and lists alternative actions. Environmental Protection Agency; established in by Presidential Executive Order, bringing together parts of various government agencies involved with the control of pollution.
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.
Erosion occurs naturally from weather or runoff but can be intensified by land-clearing practices related to farming, residential or industrial development, road building, or timber-cutting.
These areas may include bays, mouths of rivers, salt marshes, and lagoons. These brackish water ecosystems shelter and feed marine life, birds, and wildlife. Extremely toxic and found to be a carcinogen in laboratory animals, EDB has been banned for most agricultural uses in the United States.
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. Exposure is quantified as the amount of the agent available at the exchange boundaries of the organism e. An exposure event can be defined by time e.
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. The list is subject to revision.
Analysis of the practicability of a proposal; e. The feasibility study usually recommends selection of a cost effective alternative. The term can apply to a variety of proposed corrective or regulatory actions.
In research, a small-scale investigation of a problem to ascertain whether or not a proposed research approach is likely to provide useful data. Their presence in water or sludge is an indicator of pollution and possible contamination by pathogens. Fens are less acidic than bogs, deriving most of their water from groundwater rich in calcium and magnesium. Commercially sold fertilizers may contain other chemicals or may be in the form of processed sewage sludge.
Such activities often damage the ecology of the area. The process is often used to remove particles that contain pathogenic organisms. An FNSI is based on the results of an environmental assessment. This water is likely to have the highest level of lead contamination from plumbing materials. Also used to measure the speed of liquids moving through various industrial processes. It can include nitrogen oxides, carbon oxides, water vapor, sulfur oxides, particles and many chemical pollutants.
Flue gas desulfurization is current the state-of-the art technology in use by major S02 emitter, e. Excessive amounts in food can lead to fluor. Once used in the United States as a propellant in aerosols, they are now primarily used in coolants and some industrial processes. PCs containing chlorine are called chlorofluorocarbons CFCs. They are believed to be modifying the ozone layer in the stratosphere, thereby allowing more harmful solar radiation to reach the Earth's surface.
To open a cold-water tap to clear out all the water which may have been sitting for a long time in the pipes. In new homes, to flush a system means to send large volumes of water gushing through the unused pipes to remove loose particles of solder and flux.
To force large amounts of water through liquid to clean out piping or tubing, storage or process tanks. It may be used to destroy mosquitoes, black flies, and similar pests. It was meant to enhance the national fuel conservation effort by slowing fuel consumption through a miles-per-gallon requirement for motor vehicles.
Used in buildings and greenhouses. A review is consid- ered functionally equivalent when it addresses the substantive components of a NEPA review. Some grow in the ground, others attach themselves to decaying trees and other plants, getting their nutrition from decomposing organic matter.
Some cause disease, others stabilize sewage and break down solid wastes in composting. Many of them show more sensitivity to environmental change than "rough" fish. The properties are similar to x rays and other electromagnetic waves. They are the most penetrating waves of radiant nuclear energy but can be blocked by dense materials such as lead. So far, no simple way for sorting the contents of gene libraries has been devised. However, DNA pieces can be moved into bacterial cells where sorting according to gene function becomes feasible.
Measurement is made by the number of grains per cubic foot of gas emitted. GAC can be highly effective in removing elevated levels of radon from water. Used as the screening measurement for radioactivity generally due to naturally-occurring radionuclides. Activity is commonly meas- ured in picocuries. Used as the screening measurement for radioactivity from man-made radionuclides since the decay products of fission are beta particle and gamma ray emitters.
Activity is commonly measured in picocuries. Because ground water is a major source of drinking water there is growing concern over areas where leaching agricultural or industrial pollutants or substances from leaking underground storage tanks are contaminating ground water.
The time required for a pollutant to lose half its affect on the environment. For example, the half-life of DDT in the environment is fifteen years, of radium, 1, years. The time required for half of the atoms of a radioactive element to undergo decay. The time required for the elimination of one half a total dose from the body. Halons are used in fire fighting.
Hard Wafer- Alkaline water containing dissolved salts that interfere with some industrial processes and prevent soap from lathering. Such pollutants include asbestos, beryllium, mercury, benzene, coke oven emissions, radionuclides, and vinyl chloride. The HRS calculates a score based on the potential of hazardous substances spreading from the site through the air, surface water, or ground water and on other factors such as nearby population.
This score is the primary factor in deciding if the site should be on the National Priorities List and, if so, what ranking it should have compared to other sites on the list.
Typical hazardous substances are toxic, corrosive, ignitable, explosive, or chemically reactive. Any substance designated by EPA to be reported if a designated quantity of the substance is spilled in the waters of the United States or if otherwise emitted to the environment. Possesses at least one of four characteristics ignita- bility, corrosivity, reactivity, or toxicity , or appears on special EPA lists. Providing information on which facilities have extremely hazardous substances, what those chemicals are, and how much there is at each facility.
The Process also provides information on how the chemicals are stored and whether they are used at high temperatures. The process of determining whether exposure to an agent can cause an increase in the incidence of a particular adverse health effect e. They can damage living things at low concentrations and tend to accumulate in the food chain.
It was allowed for use in seed treatment until in Herbicide A chemical pesticide designed to control or destroy plants, weeds, or grasses. Herbivore An animal that feeds on plants. Used to make plastic bottles and other products. It is a serious threat to anyone who comes near the wastes without shielding. See Low-Level Radioactive Waste. In genetics, the organism, typically a bacterium, into which a gene from another organism is transplanted.
In medicine, an animal infected by or parasitized by another organism. Also a byproduct of oil refining and burning. It smells like rotten eggs and, in heavy concentration, can cause illness. Immediately Dangerous to Life and Health IDLH The maximum level to which a healthy individual can be exposed to a chemical for thirty minutes and escape without suffering irreversible health effects or impairing symptoms.
Used as a "level of concern. Any laboratory test using living cells taken from an organism. Burning of certain types of solid, liquid or gaseous materials. A treatment technology involving destruction of waste by controlled burning at high temperatures, e. Indirect dischargers can be commercial or industrial facilities whose wastes go into the local sewers. Indoor climate can affect indoor air pollution. Not all inert ingredients are innocuous. 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.
The file is usually located in a public building such as a school, library, or city hall that is convenient for local residents. Bacterium placed in compost to start biological action. A medium containing organisms which is introduced into cultures or living organisms. Activities to assure proper emissions related operation of mobile sources of air pollutants, particularly automobile emissions controls. Also applies to wastewater treatment plants and other antipollution facilities and processes.
Also termed the normalized exposure rate. In a storm, they allow some of the sewage to flow directly into a receiving stream, thus preventing an overload by a sudden surge of water into the sewers.
They are also used in separate systems to collect the flows from main and trunk sewers and carry them to treatment points. Permits issued under these circumstances are usually called "Part A" or "Part B" permits. These sources are federally regulated. This prevents the rise of pollutants that might otherwise be dispersed and can cause an air pollution episode. Various isotopes of the same element may have different radioactive behaviors.
A shallow pond where sunlight, bacterial action, and oxygen work to purify waste water; also used for the storage of wastewaters or spent nuclear fuel rods.
Shallow body of water, often separated from the sea by coral reefs or sandbars. Sanitary landfills are land disposal sites for nonhazardous solid wastes at which the waste is spread in layers, compacted to the smallest practical volume, and cover material applied at the end of each operating day.
Secure chemical landfills are disposal sites for hazardous waste. They are selected and designed to minimize the chance of release of hazardous substances into the environment. It tells how much of a substance is needed to kill half of a group of experimental organisms at a specific time of observation. The lower the LD 50, the more toxic the compound. Leaching may occur in farming areas, feedlots, and landfills, and may result in hazardous substances entering surface water, ground water, or soil.
Its use in gasoline, paints, and plumbing compounds has been sharply restricted or eliminated by federal laws and regulations. Lift- In a sanitary landfill, a compacted layer of solid waste and the top layer of cover material. A relatively impermeable barrier designed to prevent leachate from leaking from a landfill.
Liner materials include plastic and dense clay. An insert or sleeve for sewer pipes to prevent leakage or infiltration. If a substance is lipid soluble it will very selectively disperse through the environment via living tissue. List- Shorthand term for EPA list of violating facilities or lists of firms debarred from obtaining government contracts because they violated certain sections of the Clean Air or Clean Water Acts. The list is maintained by the Office of Enforcement and Compliance Monitoring.
Listed Waste- Wastes listed as hazardous under RCRA but which have not been subjected to the Toxic Characteristics Listing Process because the dangers they present are considered self-evident. Usually generated by hospitals, research laboratories, and certain industries. In a nonattainment area, any stationary pollutant source that has a potential to emit more than tons per year is considered a major stationary source. In PSD areas the cutoff level may be either or tons, depending upon the type of source.
Marshes may be either fresh or saltwater and tidal or nontidal. MCLs are enforceable standards. They are of low toxicity to man. Mist- Liquid particles measuring 40 to microns, that are formed by condensation of vapor. By comparison, "fog" particles are smaller than 40 microns. It is an imaginary plant, with features of existing or future plants used to estimate the cost of incorporating air pollution control technology as the first step in exploring the economic impact of a potential NSPS.
Models are often used to test the effect of changes of system components on the overall performance of the system. This could also apply to equivalent activity by chemical molecules. Multiple Use- Use of land for more than one purpose; i.
Could also apply to use of bodies of water for recreational purposes, fishing, and water supply. Mutate- To bring about a change in the genetic constitution of a cell by altering its DNA. In turn, "mutagenesis" is any process by which cells are mutated. Primary standards are designed to protect human health, secondary standards to protect public welfare. The list is based primarily on the score a site receives from the Hazard Ranking System. The Center, open twenty-four hours a day, is operated by the U.
Coast Guard, which evaluates all reports and notifies the appropriate agency. In plants, necrosis can discolor areas on the plant or kill it entirely.
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