Fuel stations are flammable-liquid facilities transferring thousands of liters daily. NFPA 30A (Motor Fuel Dispensing Facilities) defines dispenser layout, UST (Underground Storage Tank) leak control, emergency shutoff and Class I electrical classification. The US logs ~5,000 station fires annually — most originate at the dispenser area.
Dispenser Separation Distances
- Dispenser to building exterior: 3 m min
- Dispenser to property line: 1.5 m
- Dispenser to combustible material: 6 m (optional under canopy)
- Tank fill pipe to dispenser: 7.6 m
- Tank vent: 3.7 m above grade
Underground Storage Tank
- Double-wall tank: interstitial sensor for leak detection
- Cathodic protection: bare-steel tanks corrode and leak
- Overfill prevention: 90 percent level shutoff valve
- Spill bucket: 15 L at the fill point
- ATG (Automatic Tank Gauging): inventory + leak test
Class I Electrical Classification
NFPA 30A Table 8.3:
- Class I Div 1: dispenser interior, tank interior
- Class I Div 2: 6 m radius from dispenser, 3 m radius from vent
- Unclassified: >6 m above canopy
All equipment (LED, camera, pump) must be Div 2 listed.
Emergency Shutdown and Fire Protection
- Emergency shutoff: at dispenser + remote 6-30 m away
- Crash valve: below dispenser with thermal fuse + shear
- Portable extinguisher: 2A:10B:C 9 kg within 30 m of each dispenser
- Canopy sprinkler: NFPA 13 OH2 0.20 gpm/ft2 (optional — depends on canopy construction)
- Fire alarm: UL/FM listed per AHJ
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Sources & Further Reading
NFPA 30A, NFPA 30, NFPA 70 (NEC Article 514), PEI RP100, UL 87 Dispenser. NFPA 30A Motor Fuel Dispensing standard.