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Air Toxics Monitoring Results in the Houston-Galveston Area

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Annual Average CATMN 24-Hour Benzene Levels Monitored at Houston Area Sites in 2004 ... Chromium ESL=0.1; Arsenic & Chrome VI ESL=0.01 ... – PowerPoint PPT presentation

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Title: Air Toxics Monitoring Results in the Houston-Galveston Area


1
Air Toxics Monitoring Results in the
Houston-Galveston Area
David Brymer, Texas Commission on Environmental
Quality
2
Top 20 Compounds (by annual average
concentration) during 2004 from Houston Area
3
Annual Average CATMN 24-Hour Benzene Levels
Monitored at Houston Area Sites in 2004
Annual ESL
4
Is Benzene Trending Up or Down at Houston Area
Sites ?
Least Squares Regression Model CATMN 24-Hour
Benzene
5
Least Squares Plot of CATMN 24-Hour Benzene
Levels at Clinton Drive
6
Annual Average CATMN 24-Hour 1,3-Butadiene
Levels Monitored at Houston Area Sites in 2004
Current ESL
7
Is 1,3-Butadiene Trending Up or Down at Houston
Area Sites?
Least Squares Regression Model of CATMN 24-Hour
1,3 Butadiene
8
Least Squares Plot of CATMN 24-Hour 1,3-Butadiene
Levels at Clinton Drive
9
Galveston Airport CATMN Annual Average Trends for
Benzene and 1,3-Butadiene from 1997 - 2005
Considered Background for Houston Area
10
Galena Park CATMN Annual Average Trends for
Benzene and 1,3-Butadiene from 1998 - 2005
Benzene annual ESL
11
Annual Average and Highest CATMN 24-Hour
1,3-Butadiene Levels Monitored at Milby Park
1999-2004
12
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
13
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

14
Deer Park Annual Average Trends for Formaldehyde
from 2000 - 2004
2003 US Average Site Concentration
15
2004 Annual Average 24 hr Values (ug/m3) of
Chromium and Arsenic at NATTS sites


Chromium ESL0.1 Arsenic Chrome VI ESL0.01
16
Deer Park Annual Average Trends for Chromium
PM2.5 from 2000 - 2004
Chromium ESL0.1 Chrome VI ESL0.01
17
Deer Park Annual Average Trends for Arsenic PM2.5
from 2000 - 2004
Arsenic (inorganic) ESL
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