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107 96 1-hour 99 th Percentile SO2 Values Southwestern High School Monitor.

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Presentation on theme: "107 96 1-hour 99 th Percentile SO2 Values Southwestern High School Monitor."— Presentation transcript:

1 hour 99 th Percentile SO2 Values Southwestern High School Monitor

2 SO 2 Time Line with 99 th Percentile Trend Southeast Michigan 1 st Monroe scrubber comes online (June 2009) 2nd Monroe scrubber comes online (Nov. 2009) Gasoline sulfur standard drops from 300 to 30 ppm Diesel sulfur standard drops from 500 to 15 ppm U.S. Steel shut down Dec. 08- Aug. 09 Source: SEMCOG Economic downturn begins

3 April Episode Removed 1 st Monroe Scrubber comes online (June 2009) 2nd Monroe Scrubber comes online (Nov. 2009) Diesel sulfur standard to 15 ppm Gasoline sulfur standard From 300 to 30 ppm U.S. Steel shut down Dec. 08- Aug. 09 Source: MDEQ & SEMCOG Economic downturn begins

4 Source: Amy Robinson, MDEQ

5 Source: Jay Turner, University of Washington in St. Louis


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