At a crash scene involving a vehicle carrying hazardous materials (e.g., fuel tanker showing a hazard placard), what additional precaution must the traffic officer take?

1. Attempt to open the tank to inspect the contents.
2. Park far away (upwind), evacuate the area immediately, consult the Hazchem code, and contact specialized fire/rescue teams.
3. Hose the spill down into the nearest public storm drain.
4. Ignite a flare near the leak to see if the chemical is flammable.