Air Toxics Monitoring Results in the Houston-Galveston Area

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Air Toxics Monitoring Results in the
Houston-Galveston Area
David Brymer, Texas Commission on Environmental
Quality
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Top 20 Compounds (by annual average
concentration) during 2004 from Houston Area
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Annual Average CATMN 24-Hour Benzene Levels
Monitored at Houston Area Sites in 2004
Annual ESL
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Is Benzene Trending Up or Down at Houston Area
Sites ?
Least Squares Regression Model CATMN 24-Hour
Benzene
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Least Squares Plot of CATMN 24-Hour Benzene
Levels at Clinton Drive
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Annual Average CATMN 24-Hour 1,3-Butadiene
Levels Monitored at Houston Area Sites in 2004
Current ESL
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Is 1,3-Butadiene Trending Up or Down at Houston
Area Sites?
Least Squares Regression Model of CATMN 24-Hour
1,3 Butadiene
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Least Squares Plot of CATMN 24-Hour 1,3-Butadiene
Levels at Clinton Drive
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Galveston Airport CATMN Annual Average Trends for
Benzene and 1,3-Butadiene from 1997 - 2005
Considered Background for Houston Area
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Galena Park CATMN Annual Average Trends for
Benzene and 1,3-Butadiene from 1998 - 2005
Benzene annual ESL
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Annual Average and Highest CATMN 24-Hour
1,3-Butadiene Levels Monitored at Milby Park
1999-2004
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How Representative are CATMN Data (every 6th day
sampling) of an Annual Average?

• 1,3 Butadiene
• AutoGC (6694 observations) 0.62 ppbv
• CATMN (59 observations) 0.57 ppbv
• Benzene
• AutoGC (6815 observations) 0.67 ppbv
• CATMN (59 observations) 0.71 ppbv

Comparison of Clinton Drive AutoGC and CATMN 2004
Annual Averages for Benzene and 1,3-Butadiene
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2004 Annual Average 24- hr Formaldehyde Levels in
Houston Area
Av. US Site Conc. 3.5 ppbV
Rural Tx site

• Clinton Drive data invalidated due to sampler
  problem

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Deer Park Annual Average Trends for Formaldehyde
from 2000 - 2004
2003 US Average Site Concentration
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2004 Annual Average 24 hr Values (ug/m3) of
Chromium and Arsenic at NATTS sites


Chromium ESL0.1 Arsenic Chrome VI ESL0.01
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Deer Park Annual Average Trends for Chromium
PM2.5 from 2000 - 2004
Chromium ESL0.1 Chrome VI ESL0.01
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Deer Park Annual Average Trends for Arsenic PM2.5
from 2000 - 2004
Arsenic (inorganic) ESL