Lead

Lead is an odorless, tasteless, soft, gray metal. On exposure to air, lead is rapidly covered with a film of oxide, hydroxide, and carbonate.

Why Eliminate Lead Air Pollution Health Standards? The EPA's rationale for deregulating lead as an air pollutant is like a case study for convoluted logic.

Lead is used in the manufacture of batteries, metal products, paints, and ceramic glazes. Exposure to lead can occur from breathing contaminated workplace air or house dust or eating lead-based paint chips or contaminated dirt.

Lead exposure was present in diverse forms such as food, drinking water, air, soil dust and consumer products.

Lead Poisoning Defined Damaging the body (specifically the brain) by absorbing lead through the skin or by swallowing. This definition is in context to Environment. See more contextual defintions for Lead Poisoning.

lead poisoning - damaging the body (specifically the brain) by absorbing lead through the skin or by swallowing. least-cost planning - a process for satisfying consumers' demands for energy services at the lowest societal cost.

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Lead A heavy metal that is hazardous to health if breathed or swallowed. Its use in gasoline, paints and plumbing compounds has been sharply restricted or eliminated by federal laws and regulations.

Lead-based paint: any paint or coating with lead content equal to or greater than 1 milligram per square centimeter, or 0.5% by weight. Multiple dwelling: any dwelling containing more than two dwelling units.

Lead Agency Attorney LADD Lifetime Average Daily Dose; Lowest Acceptable Daily Dose ...

lead and copper materials, by forming a protective film on the interior surface of those materials. corrosivity. An indication of the corrosiveness of a water.

Lead: A gray-white metal that is soft, malleable, ductile, and resistant to corrosion. Sources of lead resulting in concentrations in the air include industrial sources and crustal weathering of soils followed by fugitive dust emissions.

Lead (Pb): A soft, heavy, metallic element with atomic weight 207.2 and atomic number 82. It is found in several different ores (primarily galena, but also anglesite and cerussite) and used in a wide variety of alloys.

Lead Compounds Compounds of lead - a heavy metal that is hazardous to health if breathed or swallowed. Its use in gasoline, paints, and plumbing compounds has been sharply restricted or eliminated by federal laws and regulations.

Lead Service Line: A service line made of lead which connects the water to the building inlet and any lead fitting connected to it. Legionella: A genus of bacteria, some species of which have caused a type of pneumonia called Legionaires Disease.

LD Lead. LDPE See: Low density polyethylene. LEACHING Process by which soluble materials are dissolved and carried through the soil by a percolating liquid.

channel lead An elongated opening in the ice cover caused by a water current. channel routing The process of determining progressively the timing and shape of the flood wave at successive points along a river.

New-source bias can lead to perverse incentives, because older firms (using dirtier technology) may be able to sell their products for less because of their lower compliance costs.

Landscape, Focal A view characterized by convergent lines which lead the eye to the principal point of their apparent origin.

A blood test for lead is an example of biological monitoring. Body burden The total amount of a chemical in the body. Some chemicals build up in the body because they are stored in body organs like fat or bone or are eliminated very slowly.

Until recently, most solder contained 50 percent lead. The use of lead solder containing more than 0.2% lead is now prohibited for pipes carrying potable water. sole source aquifer.

Criteria Pollutant -- Any air pollutant for which EPA has established a National Ambient Ait Quality Standard: carbon monoxide, lead, nitrogen oxides, ozone, particulates and sulfur oxides.

Environmental Management Those aspects of an overall management function (including planning) that determine and lead to implementation of an environmental policy. See also environmental management system.

For example, children who breathe in large quantities of car exhaust fumes may accumulate lead in their blood. The lead comes from the exhaust fumes emitted by cars powered by petrol that contains lead.

These aerosol particles can lead to the formation of cloud condensation nuclei, water droplet formation, and hence clouds and storm formation.

Support projects that will lead to an increased use of reclaimed wastewater for irrigation and other uses. Promote water conservation in community newsletters and on bulletin boards.

Johnson Space Center (JSC) Johnson Space Center, located between Houston and Galveston, Texas, is the lead center for NASAs manned space flight program.

As far as possible, projects should lead children to investigate local environmental features or issues, such as a waste dump, pond, animal, open field, or people's views and opinions.

Europe is taking the lead in the shift to sustainable farming practices and organic food production. While the organic food sector is soaring in the U.S.

Other Nonferrous Metals: Recyclable nonferrous metals such as lead, copper, and zinc from appliances, consumer electronics, and nonpackaging aluminum products.

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Solder: Metallic compound used to seal joints between pipes. Until recently, most solder contained 50 percent lead. Use of solder containing more than 0.2 percent lead in pipes carrying drinking water is now prohibited.

9 ppb of Arsenic, 15 ppb Lead, .00099 percent of DDT, 0.99 ppm DDE (a DDT degradate), .0049 ppm Carbon Tetrachloride, .069 ppm 2,4-D (pesticide), 14.9 ppm Trichloroethylene, 10 mg/liter of Mercury, .09 mg / liter Formaldehyde, .45 mg liter Nitrate, .

Dense metals. Examples include mercury, lead, silver, gold and uranium. HEPA filter High-Efficiency Particulate Air filter.

Time and location of observation might lead to a different appreciation of smell at the same concentration. The Hedonic scale varies between 4 and -4. The latter being a very unpleasant sensational smell ...

Criteria Air Pollutants-as required by the Clean Air Act, the EPA identifies and set standards to protect human health and welfare for six pollutants: ozone, carbon monoxide, particulate matter (PM10), sulfur dioxide, lead, and nitrogen oxide.

Adverse health effect A change in body function or cell structure that might lead to disease or health problems Aerobic Requiring oxygen [compare with anaerobic].

There is some speculation that global warming could, via a shutdown or slowdown of the thermohaline circulation, trigger localised cooling in the North Atlantic and lead to cooling, or lesser warming, in that region.

EPA has identified and set standards to protect human health and welfare for six pollutants: ozone, carbon monoxide, total suspended particulates, sulfur dioxide, lead and nitrogen oxide.

Heavy Metals: those metals (elements with high density, malleability, and electrical and thermal conductivity) that have high specific gravity and high atomic mass, such as lead, cadmium, zinc, copper, silver, and mercury.

It can damage trees and lead to acid rain, which can harm lakes and streams and also corrode exposed materials. In the presence of sunlight and volatile organic compounds, NO2 can contribute to the formation of ground-level ozone, or smog.

The water that comes out when a tap is first opened. It is likely that is has the highest level of lead contamination from weathering of pipelines. Fission Reproduction of microrganisms by means of cell division.

First draw: The water that comes out when a tap is first opened. It is likely that is has the highest level of lead contamination from weathering of pipelines.

It is also an industrial byproduct of the manufacturing of zinc, copper and lead. Its mobility depends on the pH and redox state of the local environment.

Time Critical Removals: Including emergencies lasting longer than 30 calendar days, those releases requiring initiation of on-site activity within six months of the lead agency's determination, based on the site evaluation, ...

the process of change in the traits of organisms or populations over time. Evolution, through the process of natural selection, can lead to the formation of new species. Extinct ...

First Draw The water that comes out when a faucet in the kitchen or bathroom is first opened, which is likely to have the highest level of lead contamination from old plumbing solder and pipes.

An appropriate EMS is worthwhile for all organisations in a world where a small accidental spillage of oil or detergent can lead to costs of many thousands of pounds.

When a word or group of words is printed in italics within a definition, that tells you that you'll find a definition of the word or group of words elsewhere in the glossary. Words highlighted in blue and underlined lead to a page of hyperlinks ...

cloud feedback The coupling between cloudiness and surface air temperature in which a change in surface temperature could lead to a change in clouds, which could then amplify or diminish the initial temperature perturbation.

See also: Environment, Water, Environmental, Air, National