R 325.5263 Appendix A3. Concentrations in air and water above natural background. Elements D to H.

Rules 263. (See notes in Rule 270.) TABLE I TABLE II Element (atomic number) Radionuclide* Column 1 Air (µCi/ml) Column 2 Water (µCi/ml) Column 1 Air (µCi/ml) Column 2 Water (µCi/ml) Dysprosium (66) Dy-165 S 3 x 10-6 1 x 10-2 9 x 10-8 4 x 10-4 I 2 x 10-6 1 x 10-2 7 x 10-8 4 x 10-4 Dy-166 S 2 x 10-7 1 x 10-3 8 x 10-9 4 x 10-5 I 2 x 10-7 1 x 10-3 7 x 10-9 4 x 10-5 Einsteinium (99) Es-253 S 8 x 10-10 7 x 10-4 3 x 10-11 2 x 10-5 I 6 x 10-10 7 x 10-4 2 x 10-11 2 x 10-5 Es-254m S 5 x 10-9 5 x 10-4 2 x 10-10 2 x 10-5 I 6 x 10-9 5 x 10-4 2 x 10-10 2 x 10-5 Es-254 S 2 x 10-11 4 x 10-4 6 x 10-13 1 x 10-5 I 1 x 10-10 4 x 10-4 4 x 10-12 1 x 10-5 Es-255 S 5 x 10-10 8 x 10-4 2 x 10-11 3 x 10-5 I 4 x 10-10 8 x 10-4 1 x 10-11 3 x 10-5 Erbium (68) Er-169 S 6 x 10-7 3 x 10-3 2 x 10-8 9 x 10-5 I 4 x 10-7 3 x 10-3 1 x 10-8 9 x 10-5 Er-171 S 7 x 10-7 3 x 10-3 2 x 10-8 1 x 10-4 I 6 x 10-7 3 x 10-3 2 x 10-8 1 x 10-4 Europium (63) Eu-152 (T1/2=9.2 hrs) S 4 x 10-7 2 x 10-3 1 x 10-8 6 x 10-5 I 3 x 10-7 2 x 10-3 1 x 10-8 6 x 10-5 Eu-152 (T1/2=13 yrs) S 1 x 10-8 2 x 10-3 4 x 10-10 8 x 10-5 I 2 x 10-8 2 x 10-3 6 x 10-10 8 x 10-5 Eu-154 S 4 x 10-9 6 x 10-4 1 x 10-10 2 x 10-5 I 7 x 10-9 6 x 10-4 2 x 10-10 2 x 10-5 Eu-155 S 9 x 10-8 6 x 10-3 3 x 10-9 2 x 10-4 I 7 x 10-8 6 x 10-3 3 x 10-9 2 x 10-4 Fermium (100) Fm-254 S 6 x 10-8 4 x 10-3 2 x 10-9 1 x 10-4 I 7 x 10-8 4 x 10-3 2 x 10-9 1 x 10-4 Fm-255 S 2 x 10-8 1 x 10-3 6 x 10-10 3 x 10-5 I 1 x 10-8 1 x 10-3 4 x 10-10 3 x 10-5 Fm-256 S 3 x 10-9 3 x 10-5 1 x 10-10 9 x 10-7 I 2 x 10-9 3 x 10-5 6 x 10-11 9 x 10-7 Fluorine (9) F-18 S 5 x 10-6 2 x 10-2 2 x 10-7 8 x 10-4 I 3 x 10-6 1 x 10-2 9 x 10-8 5 x 10-4 Gadolinium (64) Gd-153 S 2 x 10-7 6 x 10-3 8 x 10-9 2 x 10-4 I 9 x 10-8 6 x 10-3 3 x 10-9 2 x 10-4 Gd-159 S 5 x 10-7 2 x 10-3 2 x 10-8 8 x 10-5 I 4 x 10-7 2 x 10-3 1 x 10-8 8 x 10-5 Gallium (31) Ga-72 S 2 x 10-7 1 x 10-3 8 x 10-9 4 x 10-5 I 2 x 10-7 1 x 10-3 6 x 10-9 4 x 10-5 Germanium (32) Ge-71 S 1 x 10-5 5 x 10-2 4 x 10-7 2 x 10-3 I 6 x 10-6 5 x 10-2 2 x 10-7 2 x 10-3 Gold (79) Au-196 S 1 x 10-6 5 x 10-3 4 x 10-8 2 x 10-4 I 6 x 10-7 4 x 10-3 2 x 10-8 1 x 10-4 Au-198 S 3 x 10-7 2 x 10-3 1 x 10-8 5 x 10-5 I 2 x 10-7 1 x 10-3 8 x 10-9 5 x 10-5 Au-199 S 1 x 10-6 5 x 10-3 4 x 10-8 2 x 10-4 I 8 x 10-7 4 x 10-3 3 x 10-8 2 x 10-4 Hafnium (72) Hf-181 S 4 x 10-8 2 x 10-3 1 x 10-9 7 x 10-5 I 7 x 10-8 2 x 10-3 3 x 10-9 7 x 10-5 Holmium (67) Ho-166 S 2 x 10-7 9 x 10-4 7 x 10-9 3 x 10-5 I 2 x 10-7 9 x 10-4 6 x 10-9 3 x 10-5 Hydrogen (1) H-3 S 5 x 10-6 1 x 10-1 2 x 10-7 3 x 10-3 I 5 x 10-6 1 x 10-1 2 x 10-7 3 x 10-3 Sub** 2 x 10-3 ---------- 4 x 10-5 ----------