[en] The Westinghouse Hanford Company has been testing various technologies for decontaminating groundwaters and liquid effluents. The results of preliminary testing of three technologies are reported. The technologies are iron coprecipitation/filtration, supported liquid membranes, and reverse osmosis. The processes were tested to determine their capability to remove uranium, chromium, nitrates, and technetium. All processes removed contaminants to less than maximum contaminant limits. The secondary waste volumes were estimated for each process. The supported liquid membranes secondary waste volume was the smallest, followed by iron coprecipitation, and the largest volume was created by the reverse osmosis process. 5 refs., 7 tabs