INTERCOMPARISON OF URANIUM METHODS IN HARD DRINKING WATERLatest News / By Dr. Robert Metzger Dr. Metzger’s presentation on an intercomparison of Uranium methods in hard drinking waters given at Radiobioassay and Radiochemical Measurements Conference can be found here.A Comparison of EPA Method 908.0 and ASTM D6239 for Uranium in Hard Water Matrices.