Retail · Distribution
Underground Storage Tanks
The buried tanks and piping at a fuel station, with the leak detection that watches them every month.
What it does
Under US EPA rules, tanks installed after April 2016 are double walled with interstitial monitoring checked at least every 30 days. Pressurized piping also has an automatic line leak detector that must catch 3 gallons per hour at 10 psi within an hour. Automatic tank gauges track level, water and inventory.
Basics
| Tanks (new) | Double wall, interstitial monitoring |
| Check | At least every 30 days |
| Line leak detector | 3 gph at 10 psi within 1 h |
| Sumps | Tightness test every 3 years |
Common failures
- Slow leak from tank or piping into the soil and groundwater
Troubleshooting
- Symptom
- Inventory loss that does not match sales
- Likely cause
- Leak, theft or meter error
- What to check
- Run a tank tightness test, check the line leak detector and reconcile dispenser meters