Some chemical and even physical process produce some type of airborne particles which are usually regarded to as visible releases. These particles are connected to some of the respiratory particles and their opacity is actually used to measure these type of releases. The opacity is usually examined by use of visual assessment which uses a stopwatch. Smoke and possibly dust tend to form the biggest part of visible emissions.
The most common types of these kind of releases are smoke and dust as well. Mostly these kind of releases comprise of several particulate matter which ranges from the finest particles of about one tenth to two hundred micrometers. These particles are usually categorized into dust, fly ash, soot, fumes, liquid droplets and smoke as well.
Many industries tend to release these kind of particles which gets to the atmosphere through vents, stacks together with the conveyors or even lines. Particles can also be formed in the atmosphere either by transformation or the condensation of gases which are emitted in the atmosphere. Examples of these gases include nitrogen oxide, sulfur dioxide and other volatile organic compounds.
It has been viewed that these particles usually cause problems to human health if inhaled. Major human problems which can be caused by inhaling of these kind of gases include effects on both respiratory and the breathing system, cardiovascular disease and aggravation of existing respiratory, alteration of human body defense system, premature death, Lung tissue damage and carcinogenesis.
The particulate matter also causes significant damages to other materials like the fabric and metallic objects as well. The fine particles generally impairs clear visibility since light is scattered and therefore the visual range in the rural, urban and wilderness is significantly reduced. One of the first instruments that was designed to measure the observable emissions was the Ringelmann chart which was developed in late 1800s.
Another measurement method is the use of Ringelmann chart. This was the first tool which was developed so as to measure the observation and it came into use in the late 1800s. In the United States of America this tool got introduced in 1897. The tool then became accepted later in major cities, states together with federal regulation on the density of smoke. This tool was meant to measure the black smoke density but with time it was adopted in measuring the gray, white as well as other colors of smoke.
This tool is constructed on the premise that the greater the particulate matter in the atmosphere then the more likelihood the cloud of smoke will be which would significantly inhibit light penetration and henceforth visibility is minimized. Percentage is normally used to simply measure plume opacity. This means that the higher the opacity then the plume background is expected to be accompanied by lesser visibility.
Another method which is used in determination of opacity is the Idahos method. This methods procedure is set up in the DEQs procedures manual for air pollution control. You actually find that these procedures are almost identical to those which are confined in EPA reference method nine.
The most common types of these kind of releases are smoke and dust as well. Mostly these kind of releases comprise of several particulate matter which ranges from the finest particles of about one tenth to two hundred micrometers. These particles are usually categorized into dust, fly ash, soot, fumes, liquid droplets and smoke as well.
Many industries tend to release these kind of particles which gets to the atmosphere through vents, stacks together with the conveyors or even lines. Particles can also be formed in the atmosphere either by transformation or the condensation of gases which are emitted in the atmosphere. Examples of these gases include nitrogen oxide, sulfur dioxide and other volatile organic compounds.
It has been viewed that these particles usually cause problems to human health if inhaled. Major human problems which can be caused by inhaling of these kind of gases include effects on both respiratory and the breathing system, cardiovascular disease and aggravation of existing respiratory, alteration of human body defense system, premature death, Lung tissue damage and carcinogenesis.
The particulate matter also causes significant damages to other materials like the fabric and metallic objects as well. The fine particles generally impairs clear visibility since light is scattered and therefore the visual range in the rural, urban and wilderness is significantly reduced. One of the first instruments that was designed to measure the observable emissions was the Ringelmann chart which was developed in late 1800s.
Another measurement method is the use of Ringelmann chart. This was the first tool which was developed so as to measure the observation and it came into use in the late 1800s. In the United States of America this tool got introduced in 1897. The tool then became accepted later in major cities, states together with federal regulation on the density of smoke. This tool was meant to measure the black smoke density but with time it was adopted in measuring the gray, white as well as other colors of smoke.
This tool is constructed on the premise that the greater the particulate matter in the atmosphere then the more likelihood the cloud of smoke will be which would significantly inhibit light penetration and henceforth visibility is minimized. Percentage is normally used to simply measure plume opacity. This means that the higher the opacity then the plume background is expected to be accompanied by lesser visibility.
Another method which is used in determination of opacity is the Idahos method. This methods procedure is set up in the DEQs procedures manual for air pollution control. You actually find that these procedures are almost identical to those which are confined in EPA reference method nine.
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