At which point does ewaste become hazardous material?

I should probably wear a mask when I break them down from the sounds of things.

When the dozers at the land fills run over the e-waste it becomes loose and broken up and starts leaking into the soil.Landfills are required to have a liner and a leach pound so I do not believe it ever really becomes hazardous unless someone goes to the landfill and eats some dirt contaminated with e-waste seepage or drinks the leach water lol oh yea I forgot a lot of the landfills will take the leach water and spray it on the roads for dust control, I guess that might become an issue some how? lol fun fun fun