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BENZENE, TOLUENE AND XYLENE AIR EMISSIONS IN THOUSANDS OF POUNDS
AND AVERAGE ANNUAL CONCENTRATION IN PARTS PER BILLION BY VOLUME IN TEXAS COUNTIES, 1989 and 1994
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COUNTY
|
MEASURE
|
1989
|
1994
|
TOTAL XYLENES
|
|
BENZENE
|
|
|
|
|
|
Harris
|
Air Emissions
|
1,528
|
1,345
|
-12%
|
|
|
Average Concentration
|
3.63
|
1.83
|
-50%
|
|
Chambers
|
Air Emissions
|
None Reported
|
N/A
|
|
|
|
Average Concentration
|
1.32
|
0.56
|
-58%
|
|
Jefferson
|
Air Emissions
|
933.9
|
657.4
|
-30%
|
|
|
Average Concentration
|
2.02
|
0.89
|
-56%
|
|
Orange
|
Air Emissions
|
282.4
|
6.1
|
-98%
|
|
|
Average Concentration
|
1.92
|
0.57
|
-70%
|
|
TOLUENE
|
|
|
|
|
|
Harris
|
Air Emissions
|
3,107
|
1,872
|
-40%
|
|
|
Average Concentration
|
5.02
|
2.31
|
-54%
|
|
Chambers
|
Air Emissions
|
449
|
147
|
-68%
|
|
|
Average Concentration
|
1.91
|
0.73
|
-62%
|
|
Jefferson
|
Air Emissions
|
1,419
|
1,257
|
-11%
|
|
|
Average Concentration
|
4.11
|
1.15
|
-72%
|
|
Orange
|
Air Emissions
|
12.4
|
9.6
|
-23%
|
|
|
Average Concentration
|
5.97
|
0.70
|
-88%
|
|
TOTAL XYLENES
|
|
|
|
|
|
Harris
|
Air Emissions
|
2,764
|
2.606
|
-6%
|
|
|
Average Concentration
|
2.81
|
1.12
|
-60%
|
|
Chambers
|
Air Emissions
|
1.72
|
1.0
|
-42%
|
|
|
Average Concentration
|
0.49
|
0.19
|
-61%
|
|
Jefferson
|
Air Emissions
|
684.7
|
372.2
|
-46%
|
|
|
Average Concentration
|
2.21
|
0.35
|
-85%
|
|
Orange
|
Air Emissions
|
None Reported
|
94.0
|
N/A
|
|
|
Average Concentration
|
2.09
|
0.32
|
-81%
|
|
Source: Texas Natural Resource Conservation Commission, Decrease in
Ambient Air Concentrations of Benzene, Toluene, and Total Xylenes in Southeast Texas (May 1997).
|
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Note: Ambient concentrations are from Houston Regional Monitoring sites and South
East Texas Regional Planning Council Commission sites and do not include TNRCC sites. Emissions from Toxics Release Inventory.
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