| POLLUTANT | STANDARD | AVERAGING | DESIGNATION | EFFECTIVE |
|---|---|---|---|---|
| Ozone (O3) | 2015 (0.070 ppm) | 8-hour | Attainment/Unclassifiable | 2018-01-16 |
| Ozone (O3) | 2008 (0.075 ppm) | 8-hour | Attainment/Unclassifiable | 2012-07-20 |
| Ozone (O3) | 1997 (0.08 ppm) | 8-hour | Maintenance | 2007-03-07 |
| Ozone (O3) | 1979 (0.12 ppm) | 1-hour (revoked) | Maintenance | 1995-05-08 |
| PM2.5 | 2012 Annual (12 µg/m³) | Annual | Attainment/Unclassifiable | 2015-04-15 |
| PM2.5 | 2006 24-hr (35 µg/m³) | 24-hour | Attainment/Unclassifiable | 2009-10-08 |
| PM10 | 1987 (150 µg/m³) | 24-hour | Attainment/Unclassifiable | 1990-11-15 |
| SO2 | 2010 (75 ppb) | 1-hour | Attainment/Unclassifiable | 2013-08-05 |
| NO2 | 2010 (100 ppb) | 1-hour | Attainment/Unclassifiable | 2012-02-29 |
| CO | 1971 (35/9 ppm) | 1-hr/8-hr | Attainment/Unclassifiable | N/A |
| Lead (Pb) | 2008 (0.15 µg/m³) | Rolling 3-month | Attainment/Unclassifiable | 2011-12-31 |
| PROGRAM | POLLUTANT | TRIGGER | CONTROL | STATUS |
|---|---|---|---|---|
| NNSR (Nonattainment NSR) | NOx/VOC (ozone precursors) | N/A — area is attainment | N/A | Does not apply |
| PSD (Prevention of Significant Deterioration) | NOx (and all attainment pollutants) | 250 tpy (unnamed source); 100 tpy (named category) | BACT if major | Applies — attainment area PSD program |
| Title V Operating Permit | NOx (and all regulated) | 100 tpy | Operating permit required if major | Applies — standard 100 tpy threshold |
| HAP Major Source | HAPs | 10 tpy single / 25 tpy combined | MACT if major | Applies — separate HAP test |
Victoria County, TX (FIPS 48469) is designated Attainment/Unclassifiable under all current National Ambient Air Quality Standards (NAAQS), including the 2015 ozone standard (0.070 ppm, 8-hour), the 2008 ozone standard (0.075 ppm), PM2.5 (annual and 24-hour), PM10, SO2, NO2, CO, and lead. The county is not within any designated nonattainment area for any criteria pollutant.
For a proposed 50 MW net behind-the-meter continuous generation source, the applicable air construction permitting program is Prevention of Significant Deterioration (PSD), administered by the Texas Commission on Environmental Quality (TCEQ) in EPA Region 6. The NOx major-source trigger under PSD is 250 tons per year (tpy) for unnamed source categories, or 100 tpy for named PSD categories (e.g., fossil-fuel boilers exceeding 250 MMBtu/hr heat input). Actual source category classification depends on the final generator configuration.
No Nonattainment New Source Review (NNSR) applies because the area is in full attainment. No NOx emission offsets are required. If the source is PSD-major, Best Available Control Technology (BACT) applies rather than Lowest Achievable Emission Rate (LAER). Title V operating permit thresholds are the standard 100 tpy for any single regulated pollutant, without the lower ozone-related thresholds that apply in nonattainment areas.
Victoria County has a historical 1-hour ozone nonattainment designation (1979 standard, now revoked) that was redesignated to maintenance on May 8, 1995, with EPA-approved maintenance plans. The 1997 eight-hour ozone maintenance plan was approved March 7, 2007. These historical designations do not affect current permitting obligations under the active 2015 and 2008 ozone standards. Texas is not in the Ozone Transport Region, and no active sanctions clocks were identified for Victoria County.