MESA Specialty Gases & Equipment
provides a number of Environmental Gas standards used to ensure
environmental safety, compliance and meet regulatory requirements.
MESA Specialty Gases & Equipment produces environmental gases to
meet the unique needs in the following areas:
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Standards for
CEM and Stack Gas Monitoring
|
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Automotive
Exhaust Emission Standards
|
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Ambient
Air Monitoring Standards
|
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Low
Level NO Mixtures |
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EPA
Protocol Gases |
The following list indicates the most common
components used in our mixtures. If you do not see the component
you require, please contact us to check availability:
|
AMMONIA |
NITRIC OXIDE |
|
CARBON DIOXIDE |
OXYGEN |
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CARBON MONOXIDE |
PROPANE |
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HYDROGEN SULFIDE |
SULFUR DIOXIDE |
|
METHANE |
VARIOUS MERCAPTANS |
About the application these
gases are used for:
Pollution
Air pollution is the presence of any chemical, physical (e.g.
particulate matter), or biological agent that modifies the natural
characteristics of the atmosphere. The atmosphere is a complex, dynamic
natural gaseous system that is essential to support life on planet
earth.
Enforced air quality standards, like the Clean Air Act in the United
States, have reduced the presence of some pollutants. While major
stationary sources are often identified with air pollution, the greatest
source of emissions are actually mobile sources, primarily cars. There
are many available air pollution control technologies and urban planning
strategies available to reduce air pollution; however, worldwide costs
of addressing the issue are high.
Sources
Air pollutants are classified as either directly
released or formed by subsequent chemical reactions. A direct release
air pollutant is one that is emitted directly from a given source, such
as the carbon monoxide or sulfur dioxide, all of which are byproducts of
combustion; whereas, a subsequent air pollutant is formed in the
atmosphere through chemical reactions involving direct release
pollutants. The formation of ozone in photochemical smog is the most
important example of a subsequent air pollutant.
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Anthropogenic sources (human activity) related to
burning different kinds of fuel
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Combustion-fired power plants.
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Controlled burn practices used in agriculture and
forestry management
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Motor vehicles generating air pollution emissions.
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Marine vessels, such as container ships or cruise
ships, and related port air emissions
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Burning fossil fuels
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Burning wood, fireplaces, stoves, furnaces and
incinerators
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Other anthropogenic sources
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Oil refining, power plant operation and industrial
activity in general.
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Chemicals, dust and crop waste burning in farming,
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Fumes from paint, varnish, aerosol sprays and other
solvents.
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Waste deposition in landfills, which generate methane
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Natural Sources
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Dust from natural sources, usually large areas of
land with little or no vegetation.
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Methane, emitted by the digestion of food by animals,
for example cattle.
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Pine trees, which emit volatile organic compounds
(VOCs).
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Radon gas from radioactive decay within the Earth's
crust.
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Smoke and carbon monoxide from wildfires.
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Volcanic activity, which produce sulfur, chlorine,
and ash particulates.
In the US and Around the World
The Environmental Protection Agency (EPA or sometimes
USEPA) is an agency of the federal government of the United States
charged with protecting human health and with safeguarding the natural
environment: air, water, and land. The EPA began operation on December
2, 1970, when it was established by President Richard Nixon. It is led
by its Administrator, who is appointed by the President of the United
States. The EPA is not a Cabinet agency, but the Administrator is
normally given cabinet rank. The current Administrator (as of 2006) is
Stephen L. Johnson.
In the 1960s, 70s, and 90s, the United States Congress
enacted a series of Clean Air Acts which significantly strengthened
regulation of air pollution. Individual U.S. states, some European
nations and eventually the European Union followed these initiatives.
The Clean Air Act sets numerical limits on the concentrations of a basic
group of air pollutants and provides reporting and enforcement
mechanisms. |