After a tree has been removed, stumps can be from unsightly to dangerous. TREE LOVING CARE has 2 machines that grind those stumps into chips below ground.
The larger machine is generally used for larger stumps and for front yards and other open areas. The smaller machine fits easily through most back yard gates and is used in less accessible places.
Generally we grind the stumps low enough to accommodate whatever landscaping will follow the tree. For instance, in a ground cover bed, we may only grind 3-4" deep, whereas if another tree is to be planted in the same spot, we would want to grind the entire mass of wood.
The chips may be spread and incorporated into the soil or spread as a mulch.