I assume it's a case of illegal dumping because the owner of the property on which the tree sits did not put the tree there. However, in spite of that, it seems that the announced procedure was that Waste Management trucks would pick up trees left streetside. The drivers don't know it's "illegally dumped" so why didn't they pick it up?

City of Oakland Public Works Department addressed this issue on 02/22/2016, service request #634369.

Thanks for fixing this issue!