A tanker carrying a flammable liquid develops a leak from a bottom discharge valve while the vehicle is moving. What is the correct response?

A FLAMMABLE LIQUID LEAK from a moving tanker is an active emergency with the potential for catastrophic fire, explosion, and environmental damage. IMMEDIATE ACTIONS: STOP SAFELY — pull away from traffic, away from buildings, businesses, and populated areas; avoid areas with open flames, sparks, or electrical equipment (ignition sources for vapor); DO NOT RESTART ENGINE once stopped — the engine is an ignition source and prevents vapors from dispersing; ACTIVATE EMERGENCY SHUTOFF — many tankers have remote emergency shutoff valves that stop flow without accessing the leak directly; USE CORRECT PPE — approach only if properly equipped and trained; flammable liquid vapors are invisible, may have settled in low areas, and can ignite from a static spark; CALL 911 — fire department has foam, training, and equipment to manage flammable liquid spills; call carrier and hazmat emergency line; DO NOT attempt to cap or tighten a leaking fitting under pressure with a flammable liquid — the spray or vapor from a fitting disturbed under pressure is an immediate ignition risk; STAY UPWIND — position yourself and emergency responders upwind and uphill; EVACUATE if fire breaks out — a tanker fire requires complete evacuation; do not fight a tanker fire unless you are trained and equipped with the correct suppression agent.