R 325.5269 Appendix A9. Concentrations in air and water above natural background. Elements U to Z and certain unlisted radionuclides.

Rule 269. (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) Uranium (92) U-230 S 3 x 10-10 1 x 10-4 1 x 10-11 5 x 10-6 I 1 x 10-10 1 x 10-4 4 x 10-12 5 x 10-6 U-232 S 1 x 10-10 8 x 10-4 3 x 10-12 3 x 10-5 I 3 x 10-11 8 x 10-4 9 x 10-13 3 x 10-5 U-233 S 5 x 10-10 9 x 10-4 2 x 10-11 3 x 10-5 I 1 x 10-10 9 x 10-4 4 x 10-12 3 x 10-5 U- 234**** S 6 x 10-10 9 x 10-4 2 x 10-11 3 x 10-5 I 1 x 10-10 9 x 10-4 4 x 10-12 3 x 10-5 U- 235**** S 5 x 10-10 8 x 10-4 2 x 10-11 3 x 10-5 I 1 x 10-10 8 x 10-4 4 x 10-12 3 x 10-5 U-236 S 6 x 10-10 1 x 10-3 2 x 10-11 3 x 10-5 I 1 x 10-10 1 x 10-3 4 x 10-12 3 x 10-5 U- 238**** S 7 x 10-11 1 x 10-3 3 x 10-12 4 x 10-5 I 1 x 10-10 1 x 10-3 5 x 10-12 4 x 10-5 U-240 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 3 x 10-5 U-natural **** S 1 x 10-10 1 x 10-3 5 x 10-12 3 x 10-5 I 1 x 10-10 1 x 10-3 5 x 10-12 3 x 10-5 Vanadium (23) V-48 S 2 x 10-7 9 x 10-4 6 x 10-9 3 x 10-5 I 6 x 10-8 8 x 10-4 2 x 10-9 3 x 10-5 Xenon (54) Xe-131m Sub** 2 x 10-5 ---------- 4 x 10-7 ---------- Xe-133m Sub 1 x 10-5 ---------- 3 x 10-7 ---------- Xe-133 Sub 1 x 10-5 ---------- 3 x 10-7 ---------- Xe-135 Sub 4 x 10-6 ---------- 1 x 10-7 ---------- Ytterbium (70) Yb-175 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 Yttrium (39) Y-90 S 1 x 10-7 6 x 10-4 4 x 10-9 2 x 10-5 I 1 x 10-7 6 x 10-4 3 x 10-9 2 x 10-5 Y-91m S 2 x 10-5 1 x 10-1 8 x 10-7 3 x 10-3 I 2 x 10-5 1 x 10-1 6 x 10-7 3 x 10-3 Y-91 S 4 x 10-8 8 x 10-4 1 x 10-9 3 x 10-5 I 3 x 10-8 8 x 10-4 1 x 10-9 3 x 10-5 Y-92 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 Y-93 S 2 x 10-7 8 x 10-4 6 x 10-9 3 x 10-5 I 1 x 10-7 8 x 10-4 5 x 10-9 3 x 10-5 Zinc (30) Zn-65 S 1 x 10-7 3 x 10-3 4 x 10-9 1 x 10-4 I 6 x 10-8 5 x 10-3 2 x 10-9 2 x 10-4 Zn-69m S 4 x 10-7 2 x 10-3 1 x10-8 7 x 10-5 I 3 x 10-7 2 x 10-3 1 x 10-8 6 x 10-5 Zn-69 S 7 x 10-6 5 x 10-2 2 x 10-7 2 x 10-3 I 9 x 10-6 5 x 10-2 3 x 10-7 2 x 10-3 Zirconium (40) Zr-93 S 1 x 10-7 2 x 10-2 4 x 10-9 8 x 10-4 I 3 x 10-7 2 x 10-2 1 x 10-8 8 x 10-4 Zr-95 S 1 x 10-7 2 x 10-3 4 x 10-9 6 x 10-5 I 3 x 10-8 2 x 10-3 1 x 10-9 6 x 10-5 Zr-97 S 1 x 10-7 5 x 10-4 4 x 10-9 2 x 10-5 I 9 x 10-8 5 x 10-4 3 x 10-9 2 x 10-5 Any single radionuclide not listed in Appendix A1 to A9 with decay mode other than alpha emission or spontaneous fission and with radioactive half-life less than 2 hours. Sub 1 x 10-6 ---------- 3 x 10-8 ---------- Any single radionuclide not listed in Appendix A1 to A9 with decay mode other than alpha emission or spontaneous fission and with radioactive half-life greater than 2 hours. 3 x 10-9 9 x 10-5 1 x 10-10 3 x 10-6 Any single radionuclide not listed in Appendix A1 to A9 which decays by alpha emission or spontaneous fission. 6 x 10-13 4 x 10-7 2 x 10-14 3 x 10-8