General information only, last reviewed October 25, 2026. Full notice at the end of the page. A date on this page has passed. Check the current rule at the source before you rely on it. Dates to watch
If you own the tanks under a fuel site, you own the rules that come with them. UST compliance is the EPA's framework for keeping buried fuel from leaking into the ground, and it is built on a steady rhythm of checks, tests, and records. Each piece is simple on its own. The risk is letting the schedule slip. This guide covers what the rules actually ask for.
What UST compliance covers
UST compliance is about preventing and catching releases. The big pieces are:
- Release detection. Equipment and methods that catch a leak early.
- Spill and overfill prevention. Hardware that stops fuel from escaping during delivery.
- Corrosion protection. Keeping tanks and lines from rusting through.
- Operator training. Designated, trained people responsible for the system.
- Recordkeeping. Proof that all of the above is being done.
What the 2015 rule added
The EPA modernized the UST rules in 2015. The rule took effect October 13, 2015, with compliance deadlines running to October 13, 2018, and states with their own approved programs set their own dates. It was the first major update since 1988. The headline changes: formal operator training, tighter release detection, and a requirement to walk the site and check the equipment on a regular schedule.
The schedule you have to keep
- Every 30 days: a walkthrough inspection of spill prevention and release detection equipment, confirming there are no alarms and that records are current.
- At least annually: test the electronic and mechanical components of the release detection equipment, things like the ATG alarm, probes and sensors, and line leak detectors, for proper operation.
- For at least three years: keep the records of that testing, noting each component, whether it passed, and any fix made.
Note that states run their own UST programs and can be stricter than the federal floor, so your state agency's rules are the ones to confirm against.
Every requirement, written up
Each of these has its own piece, with the section that sets it, what the record has to show, and where a state asks for more than the federal floor.
Tanks and piping
- Line tightness testing: annual on pressurized piping and every three years on suction where the line has no monthly monitoring, and none at all on safe suction. 280.41(b), 280.44(b).
- Automatic line leak detectors: 3 gph at 10 psi within an hour, tested annually by simulating a leak. 280.44(a).
- Tank tightness testing: the 0.1 gph standard, and the narrow cases where it still applies. 280.43(c).
- Secondary containment and interstitial monitoring: what the interstice is and what watching it proves. 280.43(g).
- Single-walled tanks: what one wall rules out, and the state rules closing in. 280.43(g), 280.41(a).
- Cathodic protection: the three year test by a qualified tester, and the 60-day rectifier check. 280.31.
Equipment and walkthroughs
- Spill buckets, sumps and overfill: the three year tests, and the double walled exemption. 280.35.
- The 30-day walkthrough: what the monthly walk checks, what the annual one adds, and the delivery exception. 280.36.
- Release detection equipment testing: the five component groups in the annual operability test. 280.40(a)(3).
- Automatic tank gauging: how it works, the 0.2 gph threshold, and the annual certification.
Inspections, people and paperwork
- The monthly Class B inspection: Connecticut's version, with a named person, fifteen items, and a minimum gap between inspections.
- The third-party annual inspection: a state requirement in some states, with no counterpart in the federal rules. In Connecticut an independent technician audits your last twelve monthly reports.
- Operator A, B and C training: who needs which, and how long a certificate lasts.
- Notification: thirty days for a new system, thirty after buying one.
- Record retention: eighteen rules from one year to the life of the equipment.
- Stage I vapor recovery and weights and measures, which arrive from other authorities on their own schedules.
It connects to your wet stock
Release detection and wet stock reconciliation are two views of the same question: is the fuel that should be in the tank actually there? Daily reconciliation often catches a slow loss before a formal test does, which is why operators who run their numbers tightly tend to stay ahead of compliance. FastDragon keeps those reconciliation numbers and the compliance paper trail in one place, so a three-year records request is a few clicks.
Quick answers
Do the EPA UST rules apply to every buried fuel tank?
No. The federal rules cover tank systems with at least 10 percent of their combined tank-and-piping volume underground, and they carve out exemptions. Farm and residential tanks of 1,100 gallons or less holding motor fuel for noncommercial use are exempt, and so are tanks storing heating oil used on the same premises. State programs can still regulate tanks the federal rules skip.
What are Class A, B, and C UST operators?
They are the three designated operator roles every regulated UST facility must staff and train. A Class A operator carries overall responsibility for the compliance program, a Class B operator handles day-to-day operation and maintenance of the tank systems, and a Class C operator is the on-site person, often the clerk on shift, trained to respond first to alarms, spills, or releases.
What happens if a UST fails an inspection?
The state issues violations with deadlines to fix them, and fines can follow. Many states also enforce delivery prohibition: a tank with serious unresolved violations gets red-tagged, and fuel transporters cannot legally drop product into it until the state clears it. For a retail site, a red tag means that tank stops getting fuel.
Do UST owners need insurance?
Federal rules require the owner or operator of a petroleum UST to demonstrate financial responsibility, meaning the proven ability to pay for cleanup and third-party damages if a tank leaks. Only one of them has to show it, and both are liable if it is missing. Most owners meet it through their state UST cleanup fund, private tank insurance, or a combination of the two. Lenders usually ask for proof of it before financing a fuel site.
Who is responsible for UST compliance at a dealer site?
Responsibility follows the tank, and so does liability. A jobber who keeps ownership of the tanks at a supplied dealer station holds the compliance obligation even though someone else runs the site day to day, and the dealer who runs it shares that obligation as the operator. Supply agreements often spell out who performs the walkthroughs and testing, but the federal rules place the duties on owners and operators, so the regulator can look to either one.
Sources: the federal UST rule, 40 CFR part 280, including the definitions in 280.12, walkthroughs in 280.36, release detection testing and records in 280.40, 280.41 and 280.45, and financial responsibility in 280.90; the delivery prohibition in 42 U.S.C. 6991k; and EPA on the 2015 UST regulation. Federal rules as of October 2026.