What is the immediate primary action of a commercial driver upon discovering a hazardous material spill or chemical leak from their vehicle?

1. Wash the spill into the nearest storm sewer with water
2. Park in a safe, isolated area away from populated centers, shut off the engine and electrical master switch, isolate ignition sources, notify emergency responders (Bomberos 100 / Police 911 / CNRT), and keep bystanders upwind
3. Attempt to taste or smell the leaking liquid to identify it
4. Continue driving to reach the delivery warehouse before the tank empties