2018-03-06 13:42:00.0 [tstevens] update PrefLabel (PETROLEUM HYDROCARBONS);
2018-03-06 13:00:24.0 [tstevens] Move Concepts delete broader relation (null); add broader relation (HYDROCARBONS [aef23021-81c1-4540-a0a5-35c590142a6d,86415] - CONTAMINANTS [42c6d91b-afef-4638-95c5-0d130828b2e7,84623]);
PETROLEUM HYDROCARBONS
Organic compounds composed entirely of carbon and hydrogen atoms.
CONTAMINANTS