crop duster has just crashed outside of town downwind of the town

So what is downwind from the crop duster? Who is monitoring the wind conditions?
So long as the wind is away from populations there is no worry.
Most crop dust or spray is unlikely to drift on the wind from a crash site anyhow.
it isn't like a train car full of poison gas.

Next questions.
Who is handling the co-ordination of your EMS, Fire and Police units?

Assuming somebody responded to the crash already, (EMS, Fire, Police) have they reported any spillage?

Has anybody contacted the crop dusting company or got the MSDS?

Has anybody contacted the EPA?
Or the DOT?


Of course you are going to set up a cordon around the plane but that is pretty standard anyhow.

If the insecticides or herbicides were leaking somebody is going to want to know if they are leaking into water and if they need to do containment.
Even if they didn't leak they might need to be removed before sending inspectors in to investigate the wreck, and they almost certainly need to be removed before the wreckage is transported.

If the materials are solids they would still need cleanup.

Your hazmat crews might be cleaning up chemicals used by your Fire Dept too.

You may also going to need cleanup on spilled fuel from the plane.

Just a last thought. Do your first responders all have training in the placard system and a set of binoculars in their vehicle so they can read the placards on crashed trucks etc?