R 325.5262 Appendix A2. Concentrations in air and water above natural background. Elements C.

Rule 262. (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) Cadmium (48) Cd-109 S 5 x 10-8 5 x 10-3 2 x 10-9 2 x 10-4 I 7 x 10-8 5 x 10-3 3 x 10-9 2 x 10-4 Cd-115m S 4 x 10-8 7 x 10-4 1 x 10-9 3 x 10-5 I 4 x 10-8 7 x 10-4 1 x 10-9 3 x 10-5 Cd-115 S 2 x 10-7 1 x 10-3 8 x 10-9 3 x 10-5 I 2 x 10-7 1 x 10-3 6 x 10-9 4 x 10-5 Calcium (20) Ca-45 S 3 x 10-8 3 x 10-4 1 x 10-9 9 x 10-6 I 1 x 10-7 5 x 10-3 4 x 10-9 2 x 10-4 Ca-47 S 2 x 10-7 1 x 10-3 6 x 10-9 5 x 10-5 I 2 x 10-7 1 x 10-3 6 x 10-9 3 x 10-5 Californium (98) Cf-249 S 2 x 10-12 1 x 10-4 5 x 10-14 4 x 10-6 I 1 x 10-10 7 x 10-4 3 x 10-12 2 x 10-5 Cf-250 S 5 x 10-12 4 x 10-4 2 x 10-13 1 x 10-5 I 1 x 10-10 7 x 10-4 3 x 10-12 3 x 10-5 Cf-251 S 2 x 10-12 1 x 10-4 6 x 10-14 4 x 10-6 I 1 x 10-10 8 x 10-4 3 x 10-12 3 x 10-5 Cf-252 S 6 x 10-12 2 x 10-4 2 x 10-13 7 x 10-6 I 3 x 10-11 2 x 10-4 1 x 10-12 7 x 10-6 Cf-253 S 8 x 10-10 4 x 10-3 3 x 10-11 1 x 10-4 I 8 x 10-10 4 x 10-3 3 x 10-11 1 x 10-4 Cf-254 S 5 x 10-12 4 x 10-6 2 x 10-13 1 x 10-7 I 5 x 10-12 4 x 10-6 2 x 10-13 1 x 10-7 Carbon (6) C-14 S 4 x 10-6 2 x 10-2 1 x 10-7 8 x 10-4 (CO2) Sub** 5 x 10-5 ---------- 1 x 10-6 ---------- Cerium (58) Ce-141 S 4 x 10-7 3 x 10-3 2 x 10-8 9 x 10-5 I 2 x 10-7 3 x 10-3 5 x 10-9 9 x 10-5 Ce-143 S 3 x 10-7 1 x 10-3 9 x 10-9 4 x 10-5 I 2 x 10-7 1 x 10-3 7 x 10-9 4 x 10-5 Ce-144 S 1 x 10-8 3 x 10-4 3 x 10-10 1 x 10-5 I 6 x 10-9 3 x 10-4 2 x 10-10 1 x 10-5 Cesium (55) Cs-131 S 1 x 10-5 7 x 10-2 4 x 10-7 2 x 10-3 I 3 x 10-6 3 x 10-2 1 x 10-7 9 x 10-4 Cs-134m S 4 x 10-5 2 x 10-1 1 x 10-6 6 x 10-3 I 6 x 10-6 3 x 10-2 2 x 10-7 1 x 10-3 Cs-134 S 4 x 10-8 3 x 10-4 1 x 10-9 9 x 10-6 I 1 x 10-8 1 x 10-3 4 x 10-10 4 x 10-5 Cs-135 S 5 x 10-7 3 x 10-3 2 x 10-8 1 x 10-4 I 9 x 10-8 7 x 10-3 3 x 10-9 2 x 10-4 Cs-136 S 4 x 10-7 2 x 10-3 1 x 10-8 9 x 10-5 I 2 x 10-7 2 x 10-3 6 x 10-9 6 x 10-5 Cs-137 S 6 x 10-8 4 x 10-4 2 x 10-9 2 x 10-5 I 1 x 10-8 1 x 10-3 5 x 10-10 4 x 10-5 Chlorine (17) Cl-36 S 4 x 10-7 2 x 10-3 1 x 10-8 8 x 10-5 I 2 x 10-8 2 x 10-3 8 x 10-10 6 x 10-5 Cl-38 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 Chromium (24) Cr-51 S 1 x 10-5 5 x 10-2 4 x 10-7 2 x 10-3 I 2 x 10-6 5 x 10-2 8 x 10-8 2 x 10-3 Cobalt (27) Co-57 S 3 x 10-6 2 x 10-2 1 x 10-7 5 x 10-4 I 2 x 10-7 1 x 10-2 6 x 10-9 4 x 10-4 Co-58m S 2 x 10-5 8 x 10-2 6 x 10-7 3 x 10-3 I 9 x 10-6 6 x 10-2 3 x 10-7 2 x 10-3 Co-58 S 8 x 10-7 4 x 10-3 3 x 10-8 1 x 10-4 I 5 x 10-8 3 x 10-3 2 x 10-9 9 x 10-5 Co-60 S 3 x 10-7 1 x 10-3 1 x 10-8 5 x 10-5 I 9 x 10-9 1 x 10-3 3 x 10-10 3 x 10-5 Copper (29) Cu-64 S 2 x 10-6 1 x 10-2 7 x 10-8 3 x 10-4 I 1 x 10-6 6 x 10-3 4 x 10-8 2 x 10-4 Curium (96) Cm-242 S 1 x 10-10 7 x 10-4 4 x 10-12 2 x 10-5 I 2 x 10-10 7 x 10-4 6 x 10-12 2 x 10-5 Cm-243 S 6 x 10-12 1 x 10-4 2 x 10-13 5 x 10-6 I 1 x 10-10 7 x 10-4 3 x 10-12 2 x 10-5 Cm-244 S 9 x 10-12 2 x 10-4 3 x 10-13 7 x 10-6 I 1 x 10-10 8 x 10-4 3 x 10-12 3 x 10-5 Cm-245 S 5 x 10-12 1 x 10-4 2 x 10-13 4 x 10-6 I 1 x 10-10 8 x 10-4 4 x 10-12 3 x 10-5 Cm-246 S 5 x 10-12 1 x 10-4 2 x 10-13 4 x 10-6 I 1 x 10-10 8 x 10-4 4 x 10-12 3 x 10-5 Cm-247 S 5 x 10-12 1 x 10-4 2 x 10-13 4 x 10-6 I 1 x 10-10 6 x 10-4 4 x 10-12 2 x 10-5 Cm-248 S 6 x 10-13 1 x 10-5 2 x 10-14 4 x 10-7 I 1 x 10-11 4 x 10-5 4 x 10-13 1 x 10-6 Cm-249 S 1 x 10-5 6 x 10-2 4 x 10-7 2 x 10-3 I 1 x 10-5 6 x 10-2 4 x 10-7 2 x 10-3