Where State UST Rules Are Stricter Than Federal
The federal rule is a floor. States with programme approval set their own intervals above it, and the gaps are larger than most operators expect. Connecticut is the worked example because its regulator publishes the table.
Read from the regulator's own text and checked on 28 August 2026.
Connecticut against the federal floor
| Requirement | Federal | Connecticut | Citation | Notes |
|---|---|---|---|---|
| Overfill prevention equipment inspection | Every 3 years | Annually | RCSA 22a-449(d)-103(g)(2) | Three times as often. The most commonly missed difference. |
| Cathodic protection test | Every 3 years | Annually | RCSA 22a-449(d)-103(h)(2) | CT requires annual testing for any UST system using a cathodically protected component. |
| Line tightness test, pressurized piping | Annually | Annually, or every 6 months | RCSA 22a-449(d)-104(b)(4)(C) | Two piping categories move to a six month interval. |
| Automatic line leak detector test | Annually | Annually, or every 6 months | RCSA 22a-449(d)-104(b)(4)(B) | Same two categories. |
| Line tightness test, suction piping | Every 3 years | Every 3 years | RCSA 22a-449(d)-104(b)(5) | Matches. CT also carries the safe suction exemption. |
| Spill bucket, STP and UDC liquid tight test | Every 3 years | Every 3 years | RCSA 22a-449(d)-103(e)(2) | Matches. |
| Secondary containment test, tank and piping interstice | No general federal interval | Every 3 years | RCSA 22a-449(d)-103(d)(2) | Exempt for double walled components under continuous interstitial monitoring. |
| Monthly site inspection | Walkthrough, no named role | Class B operator, min 7 days apart | RCSA 22a-449(d)-103(b) | CT names the person, sets a minimum gap, and keeps the report on-site 3 years against the federal 1 year. |
| Third party annual inspection | No federal equivalent | Annually, within 90 days of the anniversary | RCSA 22a-449(d)-103(c) | By an independent qualified technician, who reviews the previous 12 monthly reports. |
| Operator A/B certification | Training required, no federal renewal interval | Expires 2 years after receipt | CT DEEP operator training notice |
Other states run their own programmes and set their own intervals. This page covers Connecticut because its regulator publishes the table. We would rather show one state sourced properly than fifty from memory.
Connecticut dates ahead
5 August 2025
All newly installed tanks must have continuous interstitial monitoring covering both primary and secondary containment, using inert gas, liquid or vacuum.
5 August 2025
Any entity intending to offer an A/B operator training programme in CT had to submit a new programme for DEEP approval.
7 May 2027
All interstitial spaces must be continuously monitored for double walled tanks and piping. Retrofitted tanks are treated as category 3A.
Sources
Longer write-ups at FastDragon
Fuel Data Portal is published by FastDragon Software, which sells compliance software to fuel operators. It publishes a longer piece on each of these requirements.