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Last update
06/24/2002
| SEAS (Semi-continuous Elements in Aerosol System) |
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Condensational growth by direct steam injection is used to grow particles as small as 0.084 micron |
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Samples air every 30 minutes. |
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Utilizes an inlet impacter (custom design) with a cut point of 1.2 micron at 90 LPM (Click here to see the cut-point graph at different flow rates). |
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The data obtained from SEAS demonstrates an unprecedented capability to determine the sources of toxic air pollutants. |
Some interesting results obtained from SEAS at Clifton Park site.
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Baltimore supersite SEAS data for Se show Coal Boiler Plume (fig contains 30-min data for Se on five consecutive days). |
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Elevated concentrations for Se are observed at wind directions 150o to 220o, probably, 175 to 200o, but not at other directions. There is actually a o. |
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Selenium
peak Concentrations are twelve times higher than background and six times
higher than 24-hour avg. concentrations. |
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Lead
peak correlate with OC, but not always.
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Selenium and nickel peaks are more dynamic than sulphate!! |
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SEAS at Pittsburgh Supersite: July 16, 17, 18 |
| The first result from SEAS (College park) |
