TCEQ Air Permitting

TCEQ Air Permitting: The Basics

In Texas, any facility that emits air contaminants must have authorization from the Texas Commission on Environmental Quality (TCEQ) before operating. For oil and gas operators, that covers combustion equipment, storage tanks, separators, compressors, and any other source with VOC or criteria pollutant emissions. Operating without the correct permit is a violation regardless of actual emission levels.

TCEQ air permitting is not one-size-fits-all. The pathway that applies to your facility depends on your emission rates, the type of equipment, whether your facility qualifies as a minor or major source, and whether you want to voluntarily limit emissions to stay below regulatory thresholds. Getting the wrong permit type — or missing a required permit entirely — creates compliance exposure that is difficult to correct after the fact.

Types of TCEQ Air Permits

Permits by Rule (PBR)

Permits by Rule are TCEQ's streamlined authorization pathway for common, lower-emitting equipment. No formal application is required — the operator simply confirms the source meets the PBR conditions, maintains the required records, and in some cases files a registration. PBRs cover a wide range of oil and gas equipment including tanks, engines, and pneumatic controllers. They are the starting point for most upstream facilities, but they come with emission rate ceilings and operational conditions that must be satisfied.

Minor Source Air Permits

Facilities that exceed PBR thresholds but emit below the major source cutoffs require a formal minor source air permit. This is a New Source Review (NSR) permit issued by TCEQ through an application and review process. Minor source permitting requires emission calculations, equipment specifications, and demonstration that the facility meets applicable emission standards. TCEQ processing times vary, and errors in the application extend timelines significantly.

Synthetic Minor Air Permits

A synthetic minor air permit is a permit that includes federally enforceable conditions — typically production or operational limits — that keep a facility below the major source thresholds that would otherwise trigger Title V. Operators choose synthetic minor status to avoid the substantially greater cost and burden of Title V permitting. The tradeoff is that the operational limits in the permit become legally binding and must be tracked, documented, and reported. Exceeding them is a violation.

Tektite evaluates whether synthetic minor status is the right strategy for your facility based on your current and projected emission levels, operational flexibility requirements, and long-term development plans.

Title V Operating Permits

A Title V air permit is required for major sources — facilities whose potential to emit (PTE) equals or exceeds 100 tons per year of any criteria pollutant, or 10 tons per year of any single hazardous air pollutant (HAP). For oil and gas operations, Title V applicability is most commonly triggered by large compressor stations, gas processing plants, and midstream facilities.

Title V operating permits consolidate all applicable Clean Air Act requirements into a single document. They require annual compliance certifications, periodic monitoring, and public reporting. The application process is extensive and typically takes 12 to 18 months through TCEQ. We manage the full process from applicability determination through permit issuance and ongoing compliance support.

VOC Emissions and Air Permit Thresholds

Volatile organic compounds (VOCs) are the primary driver of air permit applicability for most upstream and midstream oil and gas facilities. Storage tanks, loading operations, and equipment leaks all contribute to VOC emissions, and the calculations that determine permit thresholds are sensitive to throughput, vapor pressure, and temperature. Underestimating VOC emissions is a common cause of operating without the correct permit authorization.

Tektite conducts facility-level emissions inventories to determine actual potential to emit, confirm the applicable permit pathway, and identify any sources that may be operating without required authorization.