In principle, what you need to do is remove the oil from the sand, or from the soil that it's attached to, with any process that will dislodge the oil from the sand. The way they used to do it in the oil sands, in the early days, was like a washing machine. You put all of the oil in a drum with some detergent, you tumble it around, and it detaches from the sand. This can be applied.
