| 10 min | 30 min | 60 min | 4 hr | 8 hr | |
|---|---|---|---|---|---|
| ppm | |||||
| AEGL 1 | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 |
| AEGL 2 | 10 | 7.6 | 6.2 | 4.1 | 3.5 |
| AEGL 3 | 17 | 13 | 10 | 7.0 | 5.7 |
- Nitrogen oxides AEGL Technical Support Document (PDF)(116 pp, 806 K)
US EPA
United States Environmental Protection Agency