Sec. 2. The board may fix the solid waste management fees on the basis of the following:
(1) A flat charge for each residence or building in use in the waste management district.
(2) The weight or volume of the refuse received.
(3) The average number of containers or bags of refuse received.
(4) The relative difficulty associated with the collection or management of the solid waste received.
(5) Any other criteria that the board determines to be logically related to the service.
(6) Any combination of these criteria.