Michigan permit guide
Michigan burn-off oven permit: the records you need to keep
Most burn-off ovens in Michigan run under an air permit with the same core rules: keep the afterburner hot, prove it, and keep the paperwork. Here's what that means day to day.
At a glance
- Afterburner: at least 1,400°F, with at least 0.5 seconds retention time.
- Monitoring: a device that continuously monitors the afterburner temperature, installed, calibrated and maintained.
- Recording: temperature recorded at least once every 15 minutes.
- Malfunctions: date, duration and description of any control equipment malfunction.
- Maintenance: any maintenance performed and any testing results.
- Interlock: the primary burner shuts down if the afterburner isn't working.
- Retention: records kept on file for five years.
Source: special conditions IV.1, IV.3, IV.4, VI.1 and VI.4 of the EGLE general permit for natural gas-fired burn-off ovens. If your oven has its own Permit to Install, its conditions apply instead and are usually similar.
1. Keep the afterburner at 1,400°F
The afterburner burns the smoke and fumes from the parts being cleaned. Below 1,400°F it doesn't do that job properly, which is why the minimum matters and why inspectors look for it first. A drop below the minimum while the oven is cleaning is a problem; you need to know about it when it happens, fix the cause, and record it.
2. Monitor continuously, record every 15 minutes
A thermocouple in the afterburner, connected to a recorder, does this. The device has to be calibrated and maintained. A chart that ran out of ink or wasn't changed doesn't count as a record. See how chart, digital and automatic recorders compare.
3. Record malfunctions and maintenance
When the afterburner or its controls fail, write down the date, how long it lasted, what happened and what you did. Keep a record of maintenance and any testing — burner work, thermocouple replacement, calibrations. Inspectors ask for these, and "we fixed it but didn't write it down" doesn't help you.
4. Keep everything for five years
Temperature records, malfunction records and maintenance records all stay on file for five years and have to be produced when EGLE asks.
What gets shops in trouble
Michigan's Air Quality Division publishes its violation notices. For burn-off ovens, the same issues come up again and again:
- Gaps in the temperature record. In one 2023 notice, a shop had no afterburner records for 16 days because the monitoring wasn't reset after a power outage. EGLE found out when it requested the records after odor complaints.
- No monitoring at all. An oven running without a device on the afterburner, so no temperature records exist.
- Records that can't be produced. Two years of malfunction and maintenance records requested and not provided.
- Missing equipment paperwork. No manufacturer information showing the oven has an afterburner, automatic temperature controls and the required interlock.
A violation notice requires a written response explaining the dates, the cause, the corrective actions and how you'll prevent it from happening again.
A simple checklist
- Afterburner thermocouple and recorder working, with a calibration date on file
- Temperature record complete — no blank or overlapping charts, no missing days
- Malfunction log with date, duration, description and fix
- Maintenance and testing log
- Manufacturer documentation for the afterburner, temperature controls and interlock
- Your permit, on file and easy to find
- Five years of all of the above, organized so you can find any day
Common questions
What temperature does a burn-off oven afterburner have to run in Michigan?
Under Michigan's general permit for natural gas-fired burn-off ovens, the afterburner must maintain at least 1,400°F with a retention time of at least 0.5 seconds.
How often must burn-off oven temperatures be recorded in Michigan?
The general permit requires continuous monitoring of the afterburner temperature and recording it at least once every 15 minutes.
How long must burn-off oven records be kept?
Five years, under Michigan's general permit for burn-off ovens.
What records does an EGLE inspector ask for at a burn-off oven?
Typically the afterburner temperature records, malfunction records, maintenance and testing records, and documentation showing the oven has an afterburner, automatic temperature controls and an interlock that shuts down the primary burner.
Is OvenArchive a substitute for following my permit?
No. OvenArchive keeps the temperature record, alerts you to problems and organizes your records. Operating within your permit remains the oven operator's responsibility.
This guide is general information, not legal advice. Your own air permit is what governs your oven. Questions about your permit go to EGLE's Air Quality Division.