What Are Title V Deviations?

A practical guide for facilities in Texas and Louisiana

Title V operating permits consolidate all applicable federal (and many state) air requirements into a single, federally enforceable document. One of the most important—and sometimes misunderstood—elements of these permits is the concept of a deviation.

What Counts as a Deviation?

Under 40 CFR 70.6 and 71.6, a deviation is any situation in which an emissions unit fails to meet a permit term or condition. A deviation is not automatically a violation. Regulators determine whether enforcement action is appropriate based on the facts, the specific permit language, underlying applicable requirements, and any available affirmative defenses.

Deviations can be identified through observation, monitoring data, testing, recordkeeping, or other credible evidence. Common examples include:

• Emissions exceeding an emission limitation or standard
• Process or control-device parameters indicating that a limit has not been met
• Failure to follow a required work practice or operating condition
• Exceedances or excursions under a Compliance Assurance Monitoring (CAM) plan
• Monitoring system downtime or data-availability shortfalls that violate permit terms

For events lasting more than 24 hours, each 24-hour period is generally treated as a separate deviation.

Core Reporting Requirements

Every Title V permit must require:

1. Prompt reporting of certain deviations (especially those involving excess emissions of hazardous air pollutants or other regulated pollutants that continue beyond short time thresholds).
2. Semiannual monitoring/deviation reports that clearly identify all deviations that occurred during the period.
3. Accounting for every deviation in the annual compliance certification.

State programs implement these federal minimums and often add more specific timelines or forms.

Texas (TCEQ) Requirements

In Texas, 30 TAC Chapter 122 governs Title V permits. Key points:

• A written deviation report is required for each six-month period in which any deviations occur (due within 30 days after the end of the period). No report is needed if there were zero deviations.
• Reporting under the emissions-event rules (30 TAC §101.201) or scheduled maintenance, startup, and shutdown rules (30 TAC §101.211) does not substitute for Title V deviation reporting.

Emission events and the “below reportable quantity” issue Texas distinguishes between:

• Reportable emissions events — unauthorized emissions that meet or exceed a reportable quantity (RQ) in any 24-hour period. These require initial notification (generally within 24 hours via STEERS) and a final report.
• Non-reportable (recordable) emissions events — unauthorized emissions that stay below the applicable RQ.

Even when emissions remain below the RQ, Title V sites must still treat the event as a deviation and include it in the semiannual Deviation Report (Form TCEQ-10101 includes a dedicated Part 2 specifically for 30 TAC Chapter 101 non-reportable emission events). Facilities must also create and retain final records of these events. TCEQ investigators routinely sample non-reportable events during Title V inspections to verify recordkeeping and confirm the event truly stayed below the RQ.

Unauthorized emissions from maintenance, startup, or shutdown activities that are not authorized by an NSR permit or Permit by Rule are also deviations, regardless of quantity.

Louisiana (LDEQ) Requirements

Louisiana’s Part 70 program incorporates the federal deviation-reporting requirements of 40 CFR 70.6(a) by reference. All Title V permits therefore require semiannual reports that identify every deviation and prompt reporting of deviations.

Louisiana’s unauthorized-discharge and upset rules operate alongside these Title V obligations:

• An unauthorized discharge that causes an emergency condition must be reported no later than one hour after discovery.
• An unauthorized discharge that exceeds a reportable quantity (but does not cause an emergency condition) must be reported within 24 hours.
• Unauthorized discharges that stay below the applicable reportable quantity are still deviations. Because an unauthorized discharge is, by definition, a failure to meet a permit term or applicable requirement, these events must be identified and reported in the facility’s semiannual Title V deviation/monitoring report.

Upset reports and unauthorized-discharge reports required under state rules must also be captured in (or incorporated by reference into) the six-month Title V deviation report.

In short, staying under the reportable quantity avoids the immediate hotline-style notification, but it does not eliminate the obligation to report the event as a Title V deviation on a semiannual basis.

RMP-Related Deviations

Many Title V permits incorporate or reference Risk Management Program requirements under CAA Section 112(r) and 40 CFR Part 68. When RMP elements appear in the Title V permit, noncompliance with those elements becomes a reportable deviation. Common examples include:

• Failure to maintain or properly implement the Risk Management Plan
• Missed or incomplete process-hazard analyses, mechanical-integrity inspections, or training
• Failure to submit required RMP updates or corrections
• Deviations from prevention-program elements (operating procedures, management of change, incident investigation, compliance audits, etc.)
• Issues with the emergency-response program or coordination with local responders

These RMP-related deviations must be included in the same semiannual and annual Title V reports as emission-limit or monitoring deviations.

Practical Takeaways for Facilities

1. Below-RQ events still count. In both Texas and Louisiana, remaining under the reportable quantity avoids immediate notification obligations but does not remove the requirement to report the event as a Title V deviation on the semiannual report (and to maintain supporting records).
2. State emissions-event or unauthorized-discharge reporting does not replace Title V deviation reporting.
3. RMP program elements that are listed as applicable requirements in the Title V permit create additional deviation triggers beyond traditional emission limits and monitoring.
4. Strong internal systems for identifying, documenting, quantifying, and tracking both reportable and non-reportable events—plus any RMP-related issues—are essential for accurate semiannual and annual submissions.
5. When in doubt, document thoroughly and report. Under-reporting creates greater risk than over-reporting.

Understanding and properly managing Title V deviations is fundamental to demonstrating continuous compliance, avoiding escalated enforcement, and maintaining operational flexibility under the Clean Air Act operating-permits program. The exact requirements live in each facility’s Title V permit and the implementing state rules, so always check the specific language that applies to your site.

If your facility needs help reviewing deviation-reporting procedures, preparing semiannual reports, or aligning internal systems with TCEQ or LDEQ expectations, ClearPath Environmental Consulting is ready to assist.