What is Sand Hauling? Sand hauling is the process of transporting frac sand from a sand plant to a well site by truck. Sand haulers bring fracing sand from a sand mine to drill sites that require the use of proppants (proppant, propant) and help reduce job site costs. Frac sand can be hauled directly by truck to drilling and completion sites or stacked at nearby oilfield storage facilities in specialist cargo containers known as “sand boxes”.