The 30-Day Walkthrough Inspection Every Fuel Site Has to Do
What the 30-day UST walkthrough inspection under 40 CFR 280.36 covers, the yearly checks, the records you keep for a year and where fuel sites slip up.
Key takeaways
- Every site with underground storage tanks owes a walkthrough inspection of its spill prevention and release detection equipment every 30 days under 40 CFR 280.36.
- Containment sumps and handheld release detection equipment are checked once a year.
- Each record lists every area checked, whether it was acceptable or needed action, and what was done to fix it, and you keep it for one year.
- Thirty days is not the same as once a month. A calendar month habit will eventually leave a gap longer than 30 days.
On this page
If your convenience stores sell fuel, you owe a federal UST walkthrough inspection every 30 days, and you have to keep a record of it for a year. It is easy to miss in c-store operations, partly because it does not feel like a food safety or facilities task and partly because it sits in a part of the regulations nobody reads for fun.
The rule is 40 CFR 280.36, in force since 13 October 2018, and unlike a lot of environmental regulation it is short and specific. Here is what it asks of convenience store operators with underground storage tanks.
- The rule
- 40 CFR 280.36, for underground storage tank systems
- Every 30 days
- Spill prevention and release detection equipment
- Every 12 months
- Containment sumps and handheld release detection equipment
- The record
- Each area checked, the result and any fix
- How long to keep it
- One year
What the rule requires, exactly
The regulation splits into things you check every 30 days and things you check once a year. It also allows two alternatives that check comparable equipment: a code of practice from a nationally recognized association or independent testing laboratory (the rule names PEI RP 900 as one), or a walkthrough developed by your implementing agency. The federal list is below.
Every 30 days
Spill prevention equipment, under ¶ (a)(1)(i)(A). Visually check for damage, remove liquid or debris, check for and remove obstructions in the fill pipe, check the fill cap is securely on the fill pipe, and for double walled spill prevention equipment with interstitial monitoring, check for a leak in the interstitial area.
There is a sensible exception in the same paragraph. If you receive deliveries at intervals longer than 30 days, you may check the spill prevention equipment before each delivery instead.
Release detection equipment, under ¶ (a)(1)(i)(B). Check that the equipment is operating with no alarms or other unusual operating conditions present, and make sure records of release detection testing are reviewed and current.
Every 12 months
Containment sumps, under ¶ (a)(1)(ii)(A). Check for damage, leaks to the containment area or releases to the environment, remove liquid or debris, and for double walled sumps with interstitial monitoring, check for a leak in the interstitial area.
Handheld release detection equipment, under ¶ (a)(1)(ii)(B). Check devices such as tank gauge sticks or groundwater bailers for operability and serviceability.
The records
Under ¶ (b), you keep records for each walkthrough inspection for one year. The record has to list each area checked, whether each area checked was acceptable or needed action taken, and a description of any actions taken to correct an issue. If you check spill prevention equipment before each delivery rather than every 30 days, you keep the delivery records as well.
That last element of the record is the one that gets missed. A tick sheet showing you looked is not what the regulation asks for. It asks you to record what you found and what you did about it.
- Area checkedEvery piece of equipment on the list, one line each
- ResultAcceptable, or needed action
- Action takenWhat was done to correct the issue
- Kept one yearThe full year, ready when an inspector asks
Where operators get caught out
Thirty days is not monthly. A check on 2 January and another on 30 January is two checks in one calendar month and a 28 day gap, which is fine. A check on 2 January and the next on 2 March is a 59 day gap, which is not, even though it looks like two consecutive months on a calendar. If you run this off a calendar month habit rather than a 30 day interval, you will eventually fall short.
The record has to show the outcome, not the activity. “Checked, OK” for every line, every month, for a year is the pattern an inspector notices. Equipment that is checked twelve times and never once needs anything is either very new or not being looked at.
The fix is part of the record. If the spill bucket had three inches of water in it and somebody pumped it out, that is what ¶ (b) wants written down. The finding and the fix.
One year means the full year is retrievable. Not the last few months. If an inspector asks in November, you should be able to produce records back to the previous November.
Who does it matters. The walkthrough is usually handed to a store manager who already has twenty other things to do. If the person doing it changed three times this year, the odds that all twelve records exist and look consistent are not good.
How this fits with everything else at the site
The walkthrough is not the only recurring obligation on a fuel site, and that is really the problem. A convenience store with fuel is carrying food safety checks on the roller grill and the coffee, cooler temperatures, restroom rounds, age verification for tobacco and alcohol, and this. Each one has a different frequency, a different record requirement and often a different person responsible. Our convenience store daily operations guide covers the rest of that list.
What they have in common is that each one is a small recurring task with a record attached, and each one is invisible until it is missing.
The failure is almost never that somebody refused to do the inspection. It is that the task had no due date anybody could see, the person who used to do it left, and nobody noticed for five months because nothing announced itself.
A practical way to run it
Three things make the difference, and none of them require buying anything.
Give the walkthrough a date, not a month. Put it on a 30 day cycle with a visible due date, so a missed one is obvious the day it is late rather than at audit time.
Record findings in the same place as the fix. When the spill bucket needs pumping out, the record of the finding and the record of the fix should not live in two systems. ¶ (b) wants them together.
Make it survive a staff change. The test is whether a new manager in week one would know the inspection exists. If the answer depends on somebody remembering to tell them, it will eventually fail. Adding the forecourt checks to the same sheet as your store opening and closing checklist is a start, as long as the 30 day item has its own date.
That is the case for running recurring site checks on something that tracks a due date and keeps the history. In MaintainIQ, a checklist and maintenance app for single and multi-location operators, the walkthrough can sit as a recurring maintenance item every 30 days, with the next due date and a count of days overdue, so a missed inspection is visible rather than silent. Each completed checklist records who submitted it, and staff can add photos as proof. An item that fails can create a follow-up task that stays open until someone closes it, or a work order when equipment needs a repair, which is how the finding and the fix end up in the same record. A manager can pull up or export past records for any date range when an inspector asks, and the multi-location dashboard shows each store’s maintenance and open work orders in one place. It works the same for one store or sixty.
Frequently asked questions
Does the UST walkthrough inspection apply to every convenience store?
No. 40 CFR 280.36 applies to underground storage tank systems. A store with no fuel has no walkthrough inspection obligation under this rule.
Who enforces the walkthrough inspection rule?
The EPA sets the federal requirements, but many states run their own approved programs and may have stricter or differently worded rules. Check your state's requirements as well as the federal ones.
Can my fuel supplier do the inspection for me?
The regulation does not require the owner to do it personally. But the records and the obligation are yours, so if someone else does the walkthrough you need their record, with each area checked, the result and any action taken.
How long do I keep walkthrough inspection records?
One year under 40 CFR 280.36(b), kept in line with 280.34. State rules may require longer.
What if we only take fuel deliveries every few months?
Where deliveries come more than 30 days apart, you may check the spill prevention equipment before each delivery instead of every 30 days, and you keep the delivery records too. The release detection check has no such exception, so it stays on a 30-day cycle.
Is a photo enough of a record?
Not on its own. The rule asks for each area checked, whether it was acceptable or needed action, and a description of what was done. A record with those three things and photos attached covers it.