1. Supervisor must certify that the material is obsolete and can no longer be used.
2. All equipment, including books, must be inventoried.
3. All DOE markings must be removed from books and equipment.
4. Efforts must be made to get rid of the material in a way that is advantageous financially. A minimum of three advertisements must be placed and the supervisor is responsible for responding to inquiries.
You can read the whole article here. I am sure the feet pushing the cart to the dumpster belong to custodians.