Tar sand deposits offer long term potential for satisfying future energy needs. Two large field scale extraction experiments near Vernal, Utah, employed either a sequenced reverse-forward combustion technique or a steam flood procedure to recover in place bitumen. This report documents the evaluation of activated carbon, ozone, and reverse osmosis in treating the two types of tar sand wastewaters. Substrates included untreated and pretreated TS-1S and TS-2C wastewaters.