Which of the following is the correct procedure for handling a small spill of petrol on the workshop floor?

1. Cover the spill with dry wood shavings and leave it indefinitely
2. Apply an inert absorbent material (like kitty litter or dry sand), allow it to soak, and sweep it into a dedicated closed steel waste container
3. Wash the petrol down the drain with a high-pressure water hose
4. Use a heat gun to quickly evaporate the fuel into the room air