Pat Arnott, ATMS 360 1 Air Quality Measurements, 25 Jan 2007 Basics: Do measurements of aerosol and gases at various locations on and near campus. Evaluate.

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Pat Arnott, ATMS Air Quality Measurements, 25 Jan 2007 Basics: Do measurements of aerosol and gases at various locations on and near campus. Evaluate the potential for I80 to produce ‘excess’ aerosol and gas. Tools: 3 DustTrak PM monitors, for PM1, PM2.5, and PM10. (TSI manufacturer). 1 CO2 monitor, with Temperature (Telaire Model 7001) 1 Temperature, with Relative Humidity (Labjack) 1 CO monitor, with VOC. (MultiRAE plus)

Pat Arnott, ATMS Locations Visited, Sometimes Multiple Times

Pat Arnott, ATMS Photos During Measurements

Pat Arnott, ATMS What are PM 1, 2.5, and 10? What is P articulate M atter ( PM )? Airborne particulate matter (PM) consists of many different substances suspended in air in the form of particles (solids or liquid droplets) that vary widely in size. The particle mix in most U.S. cities is dominated by fine particles (less than 2.5 micrometers in diameter) generated by combustion sources, with smaller amounts of coarse dust (between 2.5 and 10 micrometers in diameter). Particles less than 10 micrometers in diameter, that include both fine and coarse dust particles. These particles pose the greatest health concern because they can pass through the nose and throat and get into the lungs. Particles larger than 10 micrometers in diameter that are suspended in the air are referred to as total suspended particulates (TSP). These larger particles can cause irritation to the eyes, nose and throat in some people, but they are not likely to cause more serious problems since they do not get down into the lungs. From

Pat Arnott, ATMS PM Health Effects Dust and smoke may irritate healthy people's eyes, nose, throat, and lungs, and might cause more serious problems in sensitive populations. Because dust and smoke are mixtures of different chemicals with different sizes, not everyone will experience the same effects. Most healthy adults and children will recover quickly from short-term dust and smoke exposures and will not suffer long-term consequences. In general, the long-term risk from short-term exposures to dust and smoke is low. From

Pat Arnott, ATMS People Most Affected by PM - Individuals with asthma and other respiratory diseases. - Individuals with cardiovascular disease. - The elderly. - Children. Children, even those without pre-existing illness or chronic conditions, are susceptible to air pollution because their lungs are still developing. - Smokers. People who smoke, especially those who have smoked for many years, generally have reduced lung function and may be affected by dust and smoke exposure. Smokers are also less likely to recognize and report symptoms from exposure to irritant chemicals than nonsmokers.

Pat Arnott, ATMS PM 10 and 2.5 Sources From

Pat Arnott, ATMS Ultrafine, Fine, Coarse, Supercoarse: Categories of Total Suspended Particulate Matter (TSP) From

Pat Arnott, ATMS DustTrak Schematic Diagram: Mass Measurement with Light? Hmmmm

Pat Arnott, ATMS Summary of DustTrak PM Data

Pat Arnott, ATMS Time Series of Average Data

Pat Arnott, ATMS Time Series of Faster Response Data Recommendation: Run all instruments as fast as possible. Then time average the data later.

Pat Arnott, ATMS CO2 and PM1 Data: Broad View

Pat Arnott, ATMS Detailed View of CO2 and PM 1 Data:

Pat Arnott, ATMS Temperature Measurements with Two Probes

Pat Arnott, ATMS Temperature and RH with the Labjack Probe

Pat Arnott, ATMS Conclusion PM1 and CO2 measurements near I80 were not elevated above the background on 25 Jan 07. On all measurements, it is recommended to let the instruments update as often as possible, and to do time averaging later. It is useful to use time resolved GPS measurements to help figure out where measurements were taken. CO and VOC measurements were not sensitive enough to be useful.

Pat Arnott, ATMS More on the DustTrak: Specifications

Pat Arnott, ATMS More on the DustTrak: Specifications

Pat Arnott, ATMS More on the DustTrak: Specifications