Urban management department, transportation enterprise. The certificate of muck disposal shall be examined and approved by the urban management department, and the expenses shall be borne by the muck transport enterprise itself. According to the principle of "who approves, who is responsible", the approving unit is responsible for the safety management of the muck disposal site within its jurisdiction, and the operation and management unit of the muck disposal site is the main body responsible for safety management and is responsible for the implementation of the safety management of this disposal site.