Different samples of the organic components of coal gasification and oil shale processing waste waters which have previously been tritiated by a Ranel nickel/THO catalytic procedure have been stored at -4 degrees C under acid and alkaline conditions in order to ascertain that the tritium label is located in stable positions. A comparison of the 3H nmr spectra both at the beginning and end of the experiment shows that very little release of tritium has occurred during this time interval. This finding is consistent with previous results on the Omega-9 product.