Fireball Diameter
168 m
Thermal duration: 11.4 s
5 kW/m² Burn Radius
412 m
2nd-degree burn threshold in 30s
Initial Isolation Dist.
300 m
ERG 2024 Guide 128 Standard
BLEVE Exclusion Perimeter
800 m
Mandatory full apparatus standoff
Casualty Mitigation & Evacuation Directive
30,000L gasoline road tanker collision with post-crash fire and vapor explosion risk
- 1 Establish 800m initial BLEVE evacuation perimeter for burning tanker
- 2 Divert approaching traffic at 1.5 km intersections
- 3 Deploy uncrewed water monitors for shell cooling if safe water supply exists
- 4 Isolate downwind toxic combustion vapor corridor
Highway Diversion Directive: All traffic on immediate roadway closed within 1,500 m radius. Divert to parallel relief routes immediately.
Incident Command & Hazmat Water Monitor Guide
NFPA 11 / ERG 2024
Shell Impingement Alert: If water monitors are applied, minimum required flow is 500 gpm (1,900 L/min) directly to the vapor space of the tank to arrest structural steel weakening.
Safety Warning: If tank pressure-relief valves open with rising pitch or shell discoloration occurs, withdraw all personnel beyond 800 meters immediately.
Atmospheric Vapor Migration: Current wind speed of 18 km/h directs heavy hydrocarbon vapor towards the Northeast (45°) corridor.
Calculations derive from CCPS (Center for Chemical Process Safety) BLEVE fireball equations and US DOT Emergency Response Guidebook (Guide 128 & 115).