Figure: 30 TAC §116.12(20)(A)
| POLLUTANT designation1 |
MAJOR SOURCE tons/year |
SIGNIFICANT LEVEL2 tons/year |
OFFSET RATIO minimum |
|---|---|---|---|
| OZONE (VOC, NOX)3 I marginal II moderate III serious IV severe |
100 100 50 25 |
40 40 25 25 |
1.10 to 1 1.15 to 1 1.20 to 1 1.30 to 1 |
| CO I moderate II serious |
100 50 |
100 50 |
1.00 to 14 1.00 to 14 |
| SO2 | 100 | 40 | 1.00 to 14 |
| PM10 I moderate II serious |
100 70 |
15 15 |
1.00 to 14 1.00 to 14 |
| NOx5 | 100 | 40 | 1.00 to 14 |
| Lead | 100 | 0.6 | 1.00 to 14 |
1 Texas nonattainment area designations as defined in §101.1 of this title (relating to Definitions).
2 The significant level is applicable only to existing major sources and shall be evaluated after netting, unless the applicant chooses to apply nonattainment new source review (NNSR) directly to the project. The appropriate netting triggers for existing major sources of NOX and VOC are specified in §116.150 of this title (relating to New Major Source or Major Modification in Ozone Nonattainment Areas) and for other pollutants are equal to the significant level listed in this table.
3 VOC and NOX are precursors to ozone formation and should be quantified individually to determine whether a source is subject to NNSR under §116.150 of this title.
4 The offset
ratio is specified to be greater than 1.00 to 1.
VOC = volatile organic compounds
NOX = oxides of nitrogen
NO2 = nitrogen dioxide
CO = carbon monoxide
SO2 = sulfur dioxide
PM10 = particulate matter with an aerodynamic diameter less than or equal to ten microns
5 Applies to the National Ambient Air Quality Standard for NO2.