Abstract: A sand disposal system is used with a sand management arrangement that handles flow-back of sand and other solid materials in a slurry of flow from well(s) at wellsite(s). The sand disposal system includes a tank filling module that mounts on a disposal tank at a wellsite. The module controls and weighs the disposal of the solid material or sand into the tank by actuating a flap and sensing weight with a weight sensor. The module also monitors the level in the tank to determine when emptying of the tank is needed. A control system can control operations of the module in conjunction with the other processes of the sand management arrangement.