The solution depends on the nature of the stream. If there are several solvents mixed together with other materials we blend them with similar streams and have them used for fuel at cement kilns. If there is a larger volume of one or two different solvents we may have them separated and cleaned through distillation for re-use. If it’s a large, relatively clean stream we can often find direct alternate uses for them by other industrial concerns in lower spec applications. It’s always nice when we can turn a waste product into a commodity.