what is the cost to dispose of a tree we cut down. limbs and trunk?

The debris would be classified as Brush $18/cubic yd or Brush Mixed $33/cubic yd. You can find our disposal rates on our website here: https://www.zankerrecycling.com/zanker-recycling/how-we-recycle/disposal-fees/

What if I dump junk all in general no chemicals?

Costs are determined by cubic yards... Minimum cost is about $50 per yard and up