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56 FR 7208, Feb. 21, 1991, unless otherwise noted.
62 FR 6654, Feb. 12, 1997, unless otherwise noted.
66 FR 27262, May 16, 2001, unless otherwise noted.
84 FR 5940, Feb. 22, 2019, unless otherwise noted.
89 FR 82871, Oct. 11, 2024, unless otherwise noted.
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| Terrain-adjusted effective stack height (m) | Noncomplex terrain | Complex terrain | ||||
|---|---|---|---|---|---|---|
| Values for urban areas | Values for rural areas | Values for use in urban and rural areas | ||||
| Cl2 (g/hr) | HCl (g/hr) | Cl2 (g/hr) | HCl (g/hr) | Cl2 (g/hr) | HCl (g/hr) | |
| 4 | 8.2E + 01 | 1.4E + 03 | 4.2E + 01 | 7.3E + 02 | 1.9E + 01 | 3.3E + 02 |
| 6 | 9.1E + 01 | 1.6E + 03 | 4.8E + 01 | 8.3E + 02 | 2.8E + 01 | 4.9E + 02 |
| 8 | 1.0E + 02 | 1.8E + 03 | 5.3E + 01 | 9.2E + 02 | 4.1E + 01 | 7.1E + 02 |
| 10 | 1.2E + 02 | 2.0E + 03 | 6.2E + 01 | 1.1E + 03 | 5.8E + 01 | 1.0E + 03 |
| 12 | 1.3E + 02 | 2.3E + 03 | 7.7E + 01 | 1.3E + 03 | 7.2E + 01 | 1.3E + 03 |
| 14 | 1.5E + 02 | 2.6E + 03 | 9.1E + 01 | 1.6E + 03 | 9.1E + 01 | 1.6E + 03 |
| 16 | 1.7E + 02 | 2.9E + 03 | 1.2E + 02 | 2.0E + 03 | 1.1E + 02 | 1.8E + 03 |
| 18 | 1.9E + 02 | 3.3E + 03 | 1.4E + 02 | 2.5E + 03 | 1.2E + 02 | 2.0E + 03 |
| 20 | 2.1E + 02 | 3.7E + 03 | 1.8E + 02 | 3.1E + 03 | 1.3E + 02 | 2.3E + 03 |
| 22 | 2.4E + 02 | 4.2E + 03 | 2.3E + 02 | 3.9E + 03 | 1.4E + 02 | 2.4E + 03 |
| 24 | 2.7E + 02 | 4.8E + 03 | 2.9E + 02 | 5.0E + 03 | 1.6E + 02 | 2.8E + 03 |
| 26 | 3.1E + 02 | 5.4E + 03 | 3.7E + 02 | 6.5E + 03 | 1.7E + 02 | 3.0E + 03 |
| 28 | 3.5E + 02 | 6.0E + 03 | 4.7E + 02 | 8.1E + 03 | 1.9E + 02 | 3.4E + 03 |
| 30 | 3.9E + 02 | 6.9E + 03 | 5.8E + 02 | 1.0E + 04 | 2.1E + 02 | 3.7E + 03 |
| 35 | 5.3E + 02 | 9.2E + 03 | 9.6E + 02 | 1.7E + 04 | 2.6E + 02 | 4.6E + 03 |
| 40 | 6.2E + 02 | 1.1E + 04 | 1.4E + 03 | 2.5E + 04 | 3.3E + 02 | 5.7E + 03 |
| 45 | 8.2E + 02 | 1.4E + 04 | 2.0E + 03 | 3.5E + 04 | 4.0E + 02 | 7.0E + 03 |
| 50 | 1.1E + 03 | 1.8E + 04 | 2.6E + 03 | 4.6E + 04 | 4.8E + 02 | 8.4E + 03 |
| 55 | 1.3E + 03 | 2.3E + 04 | 3.5E + 03 | 6.1E + 04 | 6.2E + 02 | 1.1E + 04 |
| 60 | 1.6E + 03 | 2.9E + 04 | 4.6E + 03 | 8.1E + 04 | 7.7E + 02 | 1.3E + 04 |
| 65 | 2.0E + 03 | 3.4E + 04 | 6.2E + 03 | 1.1E + 05 | 9.1E + 02 | 1.6E + 04 |
| 70 | 2.3E + 03 | 3.9E + 04 | 7.2E + 03 | 1.3E + 05 | 1.1E + 03 | 1.8E + 04 |
| 75 | 2.5E + 03 | 4.5E + 04 | 8.6E + 03 | 1.5E + 05 | 1.2E + 03 | 2.0E + 04 |
| 80 | 2.9E + 03 | 5.0E + 04 | 1.0E + 04 | 1.8E + 05 | 1.3E + 03 | 2.3E + 04 |
| 85 | 3.3E + 03 | 5.8E + 04 | 1.2E + 04 | 2.2E + 05 | 1.4E + 03 | 2.5E + 04 |
| 90 | 3.7E + 03 | 6.6E + 04 | 1.4E + 04 | 2.5E + 05 | 1.6E + 03 | 2.9E + 04 |
| 95 | 4.2E + 03 | 7.4E + 04 | 1.7E + 04 | 3.0E + 05 | 1.8E + 03 | 3.2E + 04 |
| 100 | 4.8E + 03 | 8.4E + 04 | 2.1E + 04 | 3.6E + 05 | 2.0E + 03 | 3.5E + 04 |
| 105 | 5.3E + 03 | 9.2E + 04 | 2.4E + 04 | 4.3E + 05 | 2.3E + 03 | 3.9E + 04 |
| 110 | 6.2E + 03 | 1.1E + 05 | 2.9E + 04 | 5.1E + 05 | 2.5E + 03 | 4.5E + 04 |
| 115 | 7.2E + 03 | 1.3E + 05 | 3.5E + 04 | 6.1E + 05 | 2.8E + 03 | 5.0E + 04 |
| 120 | 8.2E + 03 | 1.4E + 05 | 4.1E + 04 | 7.2E + 05 | 3.2E + 03 | 5.6E + 04 |
[56 FR 32691, July 17, 1991, as amended at 71 FR 40277, July 14, 2006]