An unplanned shutdown does not check your calendar before it happens. A reactor trips, a tank develops a hot spot, or a unit has to come down hours before anyone expected it. When that happens at your refinery or terminal on the Gulf Coast, you are now managing two problems at once: getting the unit cleared and safe, and staying inside the limits of your air permit while you do it.
We work alongside refinery and terminal teams across Texas and Louisiana when that exact situation lands on someone’s desk. What we have learned over three decades of this work is that the first few hours after an unplanned outage tend to decide how the rest of the case goes with TCEQ, not the weeks of paperwork that follow.
What Makes a Shutdown Count as Unplanned Under Texas Air Rules
Texas treats a maintenance, startup, or shutdown activity differently depending on whether you saw it coming. Scheduled work that you can plan for ahead of time falls under one set of rules, and TCEQ generally wants advance notice when that work is expected to push emissions past a reportable amount. An unplanned activity is something different. It is a startup or shutdown that falls outside your normal, predictable operations, or a repair forced by a sudden event beyond your control that calls for immediate action to head off a bigger upset.
That distinction matters because it changes your reporting clock. TCEQ requires notification within 24 hours and a final written record within two weeks, which you can confirm directly through TCEQ’s emissions event reporting requirements. Emergency storage tank degassing, done ahead of a repair or an inspection that cannot wait, almost always falls into this category.
Why the First Hours of Your Response Matter to TCEQ
This is the part that gets missed in a lot of planning. When TCEQ reviews a reportable emissions event, an investigator looks at how long it lasted and whether a maintenance, startup, or shutdown action could have helped reduce or eliminate the emissions involved. A vapor control response that gets your tank degassed quickly and safely is not just an operational win. It becomes part of the evidence that you took the kind of corrective action regulators expect to see.
If you claim an affirmative defense for the event, TCEQ gives you up to 30 days to respond to its follow-up questions, compared to about a week when no affirmative defense is claimed. A clean timeline of when the event started, when your degassing work began, and when the unit was verified gas-free makes that response far easier to put together. We build that documentation as part of every emergency job, not as something assembled after the fact.
A fast response also helps you avoid the harder path. If the investigator decides a Notice of Violation should be issued, you get 30 days from that notice to show you are back in compliance, and the case only moves toward formal enforcement if that window is missed. Refineries that can show a tight, well-documented response are in a far better position at every step of that process.
What Our Team Does When the Call Comes In
We often hear about an unplanned outage not long after it happens, while your environmental and operations teams are still working out the scope. Our first step is to get a clear picture of the tank or unit, what it held, and what your entry and inspection timeline looks like. From there we work directly with your turnaround planners and environmental staff so the vapor control work lines up with whatever notification or reporting TCEQ requires for the event.
Our crews approach an emergency tank job with the same discipline we bring to planned refinery turnaround work, tracking conditions inside the tank throughout the job, including the explosive range and toxic gas readings, and holding off on calling a vessel safe for entry until those numbers confirm it. Every job closes with documentation your environmental team can hand straight to TCEQ or keep on file, covering the timeline, the readings taken, and how the vapors were handled. That paper trail is often what turns a stressful week into a closed file instead of an open question.
Turnaround Support for an Emergency Shutdown
One of our case studies covers exactly this kind of situation: a refinery turnaround team that needed support after an emergency shutdown, the sort of event that does not wait for a planned outage window to happen. That project sits in our degassing and vapor control portfolio alongside our other turnaround work. You can read the full write-up in our case study on emergency shutdown turnaround support.
“They provided timely communication and, with the support of their teams, contributed to a safe Turnaround. Their quick response to events helped us maintain our commitments to safety and the environment. I would not hesitate to recommend them to lead crews on other jobs.”
Area Technical Manager, Irving Oil
Where We Work Across Texas and the Gulf Coast
Most of the emergency calls we get come from refineries, terminals, and chemical plants along the Texas Gulf Coast. Our coverage extends into Louisiana as well, alongside California, the Midwest, the Northeast, Oklahoma, Colorado, New Mexico, Pennsylvania, and Canada. Wherever the call comes from, our crews are positioned to reach a site without the delay of traveling in from out of region.
Staying in Compliance Once the Emergency Is Over
The work is not finished once the tank is gas-free. Your final record of the event, including timelines, readings, and the steps taken to control emissions, needs to hold up if TCEQ comes back with questions, which can happen weeks after the event closes. We hand off a complete package at the end of every job so your environmental team has what it needs without having to reconstruct the timeline from memory. If your facility wants a second look at how its overall reporting and recordkeeping practices line up with current requirements, you can see how we support that work outside of an active emergency through our compliance support.
Frequently Asked Questions
What makes a shutdown count as unplanned under Texas air rules?
It generally comes down to whether the event was predictable and within your control. A startup or shutdown outside normal operations, or a repair triggered by a sudden failure, usually falls into the unplanned category rather than the scheduled one.
How fast do we need to notify TCEQ after an emergency shutdown?
If the event is expected to release more than the reportable quantity for a chemical within 24 hours, you need to notify TCEQ within that same window, with a final written record to follow within two weeks. It helps to start logging the timeline the moment the event begins, since that record needs to hold up if questions come later.
Does a fast degassing response actually help during a TCEQ review?
It can. TCEQ looks at whether a maintenance, startup, or shutdown action could have reduced the emissions involved, so a quick, well-documented response gives you a stronger position if the agency follows up.
What records should we keep after an emergency tank degassing job?
Keep the event timeline, the readings taken during the work, and confirmation of when the vessel was verified safe for entry. Texas recordkeeping rules call for keeping that record on file for at least five years.
Do you only work along the coast, or do you cover other parts of Texas, like the Dallas area?
Our listed coverage area for Texas is the Gulf Coast specifically. If your site is elsewhere in the state, including around Dallas, the most reliable next step is to call 888-997-9465 and confirm coverage and mobilization for your exact location.
Do you work outside Texas, across the rest of the Gulf Coast?
Yes. We support refineries, terminals, and chemical plants in Louisiana as well, where the Louisiana Department of Environmental Quality has its own reporting requirements for unscheduled emissions events.
Does this only apply to refineries, or do terminals and chemical plants need the same kind of response?
Refineries aren’t the only sites dealing with unplanned outages. We support the same kind of emergency response at midstream terminals, chemical plants, and industrial facilities that store or move the same hydrocarbons and face the same reporting requirements.
Do we need a new air permit before an emergency degassing job, or does our existing permit already cover it?
An unplanned event generally isn’t handled through your existing permit at all. It runs through the separate emissions event reporting and recordkeeping process under Texas air rules, so the priority at the moment is getting the notification and documentation right, not chasing a permit amendment.
Can your team mobilize for an unplanned outage without the months of lead time a planned turnaround usually takes?
Yes, that’s the point of an emergency response team. A planned turnaround gets scoped well in advance, but an unplanned outage doesn’t get that luxury, so we build the plan around the specific tank or unit in front of us rather than waiting for a turnaround calendar to open up.
What happens to the product still inside the tank during an emergency degassing job?
That depends on the product and the reason for the outage. In most cases the remaining liquid is pumped out before vapor work begins, and we plan the vapor control sequence around whatever product, water, or sludge is left behind so the tank can be cleared safely.
Ready to Talk to Our Team?
If your site is in the middle of an unplanned outage, or wants a response plan in place before that call ever comes in, we are ready to help. Request a quote or call 888-997-9465 to reach our team.
We have supported refineries, terminals, and petrochemical plants across Texas and the Gulf Coast since 1992, with a 0.0 TRIR safety record across our project history. Whether the work is planned months in advance or starts with an unexpected phone call, our team brings the same level of care to getting your site back in service and your paperwork in order.
