In a fueling incident gas leak, where should apparatus position itself?

• A. Upwind
• B. Uphill
• C. Downhill
• D. On the far side

Answer: (B)

The main idea is to keep responders elevated relative to the leak. In a fueling incident with a gas leak, vapors tend to migrate and pool in low areas due to gravity, and they can travel along the ground or be drawn into lower elevations. Positioning apparatus uphill from the leak places you above any accumulated vapors and reduces the chance that vapors will drift or pool into your location, lowering exposure and ignition risk.

If wind direction is known, staying upwind would also help, but uphill is the more protective single precaution on level ground because it directly counters vapor pooling at lower elevations. Being downhill or on the far side would place you closer to potential vapor buildup or allow vapors to reach you more easily.