Operating Without an AQMD Permit? How to Get Back Into Compliance
If you have realized that a piece of equipment at your facility is running without an air permit, the first thing to know is this: the path back to compliance is well-traveled.
If you have realized that a piece of equipment at your facility is running without an air permit, the first thing to know is this: facilities work through situations like this regularly, and the path back to compliance is well-traveled.
The discovery is rarely dramatic. It tends to show up one of three ways: a piece of equipment was inherited from a prior tenant or owner and nobody ever filed for it; an ownership change separated the facility from its old permit numbers; or a letter arrived from the air district saying a permit is required for something currently on site. The most common version we hear sounds like a sentence the EHS contact at an aerospace facility recently used with us: “We may have an air permit issue. We are operating something without a permit.” For full context on California air permitting, see our air quality compliance in California guide.
This piece walks through how unpermitted operation typically gets discovered, what to do in the first week, and what the regularization process actually looks like with the air district.
How Facilities Usually Find Out
We have walked into all three of these scenarios. The pattern is consistent.
- Inherited equipment with no permit on file. A facility takes over a building or a piece of equipment from a previous tenant. The equipment runs. Production continues. Nobody asks whether it was ever permitted because nobody has any reason to. The longest gap we have personally seen was a shot-blasting machine running for twenty years with no air permit on file. Grit blasting, dust collectors, ovens, and surface-coating booths are the equipment types this happens to most often.
- Ownership change that orphaned the permits. Permits are tied to the operator and the facility. When a company is acquired, sold, or restructured, the permits do not automatically follow. The South Coast Air Quality Management District (SCAQMD) and the Bay Area Air Quality Management District (BAAQMD) both periodically cross-check facility names against their permit databases. Operators that appear to be running permitted equipment without holding the corresponding permit get flagged. One client of ours got that exact notice from SCAQMD after an ownership change: the air district confirmed the facility did not currently have permits, and we worked back through what existed under the prior entity.
- Direct district notice on specific equipment. Sometimes the discovery is not a database flag but a targeted letter: the air district has identified a specific source on your property that requires a permit. The subject line of one such notice we worked through read “AQMD Requires Permit for Grit Blast Equipment.” That kind of notice is the air district telling you what they have already concluded; the question is what you do next.
What To Do First: Five Steps
Order matters here. The first week of response sets the tone for the rest of the regularization. Walk through these in sequence.
Don’t make a panic shutdown decision, but assess the situation first.
Operating without a permit is a problem to resolve, not usually a reason to abruptly shut down a line. In most cases the air district would rather have the operator come forward and file than walk into an abandoned facility. Before anything else, evaluate whether the district notice, the applicable rule, or the risk profile of the equipment requires you to stop, curtail, or limit operation. If the district has ordered cessation, or if continuing would worsen the violation, follow that requirement while you prepare the permit response.
Write down what you have.
For the equipment in question: make, model, capacity, age, install date, hours of operation, the chemicals or fuels it processes, any abatement device attached to it, and the distance from the nearest school. If you have a prior owner’s records, pull them. If you have nothing, write that down too. The first deliverable to the air district is going to draw from this list.
Pull every air permit, application, and district letter you can find.
Look in the facility filing cabinet, on the previous EHS contact’s laptop, and in any acquisition or lease records. Permits issued to the prior entity are not yours, but they tell us what the equipment was permitted as before. Past Notices of Violation matter too; the district will see them on their side regardless.
It usually helps to get your facts straight before you call the district.
Reaching out before you understand what you have can put unverified information on the record. Many facilities find it works better to first scope the situation with an air-permit consultant who can assess the equipment, prepare the engineering position, and handle the district communication. Air districts tend to respond better to a properly assembled application than to a call from a facility that does not yet know what it is dealing with.
Decide on representation.
You will need someone to prepare the Authority to Construct or after-the-fact permit application, run the emissions calculations, coordinate with the district engineer, and respond to the inevitable follow-up questions. This is six to nine months of back-and-forth in Southern California; less in some other districts. Pick the representation before the clock starts.
The Path Back to Compliance
Regularizing an unpermitted source generally runs through these stages. The order is the same regardless of district.
- Stage 1: Applicability confirmation. Before anyone writes an application, we confirm that the equipment actually requires a permit under the relevant district’s rules. The exemptions are narrow but real, and on occasion a source that everyone assumed needed a permit turns out to be exempt. If that is the case, the deliverable is a written confirmation letter you can keep on file. For more on this step, see do I need an air quality permit.
- Stage 2: Application packet. If a permit is required, we prepare it as either an Authority to Construct (ATC) or an after-the-fact application, depending on what the district is willing to accept. In BAAQMD that means Form P-101B and the source-specific forms (combustion, abatement, surface coating, solvent cleaning, organic storage, emission point). In SCAQMD that means the 400-series forms with the per-equipment Form 400-A and Form 400-E supplements, plus the application sent through the Diamond Bar office. We attach the Safety Data Sheets (SDSs), the equipment data sheets, the site map, the emissions calculations, and a cover letter that explains the history honestly. Air districts respond better to clean disclosure than to hedging. For the full breakdown of that process, see how to get an air quality permit in California.
- Stage 3: District review and response. The district engineer assigned to your application will come back with questions: missing documents, clarifications on usage rates, emissions assumptions they want to revisit. We handle the correspondence. Review timelines in Southern California typically run six to nine months; other districts move faster.
- Stage 4: Permit to Operate. Once the district is satisfied, an Authority to Construct (or its after-the-fact equivalent) issues, then a Permit to Operate after the equipment is confirmed installed and compliant. The Permit to Operate is what you renew annually going forward.
What To Expect From the District
Three things are worth setting expectations on.
Penalty exposure is real but negotiable.
Operating without a required permit is a violation the district can act on. In practice, voluntary disclosure paired with a complete application is treated very differently from discovery during an enforcement inspection. We do not promise penalty waivers, and you should be skeptical of anyone who does, but the path of “we found it, we are fixing it, here is the packet” is the path with the best outcomes.
The district will ask about everything else, too.
Once a permit application opens on a previously unpermitted source, the district engineer may look at adjacent equipment. If there are other sources at the facility that should have been permitted, plan for them to come up. A clean, complete first application reduces the number of follow-up rounds; a partial one invites more questions.
Annual reporting may also apply.
Sources that require a permit often also need to file an Annual Emissions Report (AER) for the year the equipment was running unpermitted. Catching that during regularization, rather than later, keeps the cleanup contained to a single coordinated submittal.
Ownership Changes and Facility Transitions
If the unpermitted-equipment issue traces back to an acquisition, a sale, or a change in operator, it usually does not stop at air permits. Hazardous Materials Business Plans, EPA ID numbers, stormwater permits, and CUPA filings (your local CUPA, which may be a county environmental health department, fire department, or another local agency depending on jurisdiction, administers the hazmat side) all sit in the same category: tied to the entity, not the building. For facility-transition compliance more broadly, see our facility changes and ownership transitions coverage, and verify the air-permit assignment as part of the broader transition checklist next time, not as a standalone issue.
How CDMS Handles This Work
When a facility calls us about an unpermitted source, we typically come to the facility, walk the equipment, document specifications, and pull together the engineering position before any district communication goes out. We work with the four California air districts most often: BAAQMD, SCAQMD, SJVAPCD, and Sacramento. The application forms, emissions calculations, abatement-efficiency assumptions, and follow-up correspondence are work we do under one engagement, so the facility is not coordinating between specialists. Our consultants travel to your site for the walk-through and the data collection; you do not come to us.
Need to know what getting compliant costs? What drives air quality permit cost in California →
Trusted throughout California
BSY started working with CDMS last year after our in-house EHS person departed the company. CDMS reviewed our existing operational permits as well as any additional Federal, State and Local regulations that could apply and helped us to create a comprehensive compliance calendar to track regulatory deadlines and submittal due dates. The CDMS team does an excellent job of tracking everything and can be relied upon to complete the forms accurately and assist with submittals, allowing me to focus on our business.
Speak with a CDMS EHS expert
Tell us about your facility and your deadline. You’ll get a clear read on what applies and a scoped plan to handle it.