UST Systems with Field-Constructed Tanks and Airport Hydrant Fuel Distribution Systems
R. 61-92, Part 280.250(a) states that "Airport hydrant fuel distribution system (also called airport hydrant system)" means an UST system which fuels aircraft and operators under high pressure with large diameter piping that typically terminates into one or more hydrants (fill stands). The airport hydrant system begins where fuel enters one or more tanks from an external source such as a pipeline, barge, rail car, or other motor fuel carrier.
R.61-92, Part 280.250(b) states that "Field-Constructed tank" means a tank constructed in the field. For example, a tank constructed of concrete that is poured in the field, or a steel or fiberglass tank primarily fabricated in the field is considered field-constructed.
If you are planning to Install a UST system with Field-Constructed Tanks or Airport Hydrant Fuel Distribution System please submit an Application for Permit to Install:
- Application for Permit to Install Field-Constructed Tank (pdf)
- Application for Permit to Install Airport Hydrant System Tank (pdf)
Leak Detection Requirements
| Method | Requirement |
|---|---|
| Vapor Monitoring | Must be combined with Inventory Control and Tank Tightness Test |
| Groundwater Monitoring | Must be combined with Inventory Control and Tank Tightness Test |
| Automatic tank Gauge Option 1 | Can detect a 1 gallon/hour leak and must be used with a Tank Tightness Test every 3 years |
| Automatic Tank Gauge Option 2 | Can detect less than or equal to 2 gallon/hour leak with a Tank Tightness Test every 2 years |
| Inventory Control | Can detect less than or equal to 0.5 gallon/hr leak with a Tank Tightness Test every 2 years |
The methods listed in the table above are for Airport Hydrant and Field-Constructed Systems with a capacity of greater than 50,000 gallons only.
- You can refer to the following industry standards for further reference: API 1615; ANSI B31.3; Unified Facilities Criteria 3-460-01; Defense Directive 4140.25
- Field Constructed Systems only of greater than 50,000 gallon can use single walled piping