1. Spatial analysis of ozone exceedances and its precursor emissions in HG area
Junsang Nam
11/18/03

2. Ozone Exceedances Ozone Formation HG area (TCEQ Reg. 12)
44 monitoring stations
Annual ozone exceedances from 1999 to 2003

3. Precursor Emission - VOC
Point Sources
- PSDB (Ethene, Propene, Isobutane, Trans-2-butene, Cis-2-butene)
Biogenic Sources
- Vegetation
Source : TCEQ

4. Precursor Emission - NOx
Point Sources
- PSDB
- 4,317 sources
On-road mobile
- Major highways
Source : TCEQ

5. HG area map
TX general land office
NAD 83
Albers equal area

6. Ozone Exceedances - 2003 44 monitoring stations
Ordinary kriging in Geostatistical Analyst

7. VOC – Point sources Ethene 2,003 point sources (Stack)
Concentrated in the Ship Channel area
Tons/yr

8. VOC - Biogenic 1,533 objects 47 vegetation code 11 lumped code
Large forest areas right north of the Ship Channel area

9. NOx – Point Sources 4,317 point sources (Stack)
Concentrated in the Ship Channel area
Tons/yr

10. Future Work Ozone exceedances – 1999, 2000, 2001, and 2002
VOC (PSDB) – Propene, Isobutane, Trans-2-butene, and Cis-2-butene
NOx – On-road mobile
Correlation analysis of ozone exceedances and precursor emissions