R 325.5146 Schedule A - Exempt concentrations.

Rule 146. See Rule 65. Element (atomic number) Radionuclide Column I Gas concentration µCi/ml* Column II Liquid and solid concentration µCi/ml** Antimony (51) Sb 122 Sb 124 Sb 125 3 x 10-4 2 x 10-4 1 x 10-3 Argon (18) Ar 37 Ar 41 1 x 10-3 4 x 10-7 Element (atomic number) Radionuclide Column I Gas concentration µCi/ml* Column II Liquid and solid concentration µCi/ml** Arsenic (33) As 73 As 74 As 76 As 77 5 x 10-3 5 x 10-4 2 x 10-4 8 x 10-4 Barium (56) Ba 131 Ba 140 2 x 10-3 3 x 10-4 Beryllium (4) Be 7 2 x 10-2 Bismuth (83) Bi 206 4 x 10-4 Bromine (35) Br 82 4 x 10-7 3 x 10-3 Cadmium (48) Cd 109 Cd 115m Cd 115 2 x 10-3 3 x 10-4 3 x 10-4 Calcium (20) Ca 45 Ca 47 9 x 10-5 5 x 10-4 Carbon (6) C 14 1 x 10-6 8 x 10-3 Cerium (58) Ce 141 Ce 143 Ce 144 9 x 10-4 4 x 10-4 1 x 10-4 Cesium (55) Cs 131 Cs 134m Cs 134 2 x 10-2 6 x 10-2 9 x 10-5 Chlorine (17) Cl 38 9 x 10-7 4 x 10-3 Chromium (24) Cr 51 2 x 10-2 Cobalt (27) Co 57 Co 58 Co 60 5 x 10-3 1 x 10-3 5 x 10-4 Copper (29) Cu 64 3 x 10-3 Dysprosium (66) Dy 165 Dy 166 4 x 10-3 4 x 10-4 Erbium (68) Er 169 Er 171 9 x 10-4 1 x 10-3 Europium (63) Eu 152 (T1/2=9.2 hrs) Eu 155 6 x 10-4 2 x 10-3 Fluorine (9) F 18 2 x 10-6 8 x 10-3 Gadolinium (64) Gd 153 Gd 159 2 x 10-3 8 x 10-4 Gallium (31) Ga 72 4 x 10-4 Germanium (32) Ge 71 2 x 10-2 Element (atomic number) Radionuclide Column I Gas concentration µCi/ml* Column II Liquid and solid concentration µCi/ml** Gold (79) Au 196 Au 198 Au 199 2 x 10-3 5 x 10-4 2 x 10-3 Hafnium (72) Hf 181 7 x 10-4 Hydrogen (1) H 3 5 x 10-6 3 x 10-2 Indium (49) In 113m In 114m 1 x 10-2 2 x 10-4 Iodine (53) I 126 I 131 I 132 I 133 I 134 3 x 10-9 3 x 10-9 8 x 10-8 1 x 10-8 2 x 10-7 2 x 10-5 2 x 10-5 6 x 10-4 7 x 10-5 1 x 10-3 Iridium (77) Ir 190 Ir 192 Ir 194 2 x 10-3 4 x 10-4 3 x 10-4 Iron (26) Fe 55 Fe 59 8 x 10-3 6 x 10-4 Krypton (36) Kr 85m Kr 85 1 x 10-6 3 x 10-6 Lanthanum (57) La 140 2 x 10-4 Lead (82) Pb 203 4 x 10-3 Lutetium (71) Lu 177 1 x 10-3 Manganese (25) Mn 52 Mn 54 Mn 56 3 x 10-4 1 x 10-3 1 x 10-3 Mercury (80) Hg 197m Hg 197 Hg 203 2 x 10-3 3 x 10-3 2 x 10-4 Molybdenum (42) Mo 99 2 x 10-3 Neodymium (60) Nd 147 Nd 149 6 x 10-4 3 x 10-3 Nickel (28) Ni 65 1 x 10-3 Niobium (41) (Columbium) Nb 95 Nb 97 1 x 10-3 9 x 10-3 Osmium (76) Os 185 Os 191m Os 191 Os 193 7 x 10-4 3 x 10-2 2 x 10-3 6 x 10-4 Palladium (46) Pd 103 Pd 109 3 x 10-3 9 x 10-4 Element (atomic number) Radionuclide Column I Gas concentration µCi/ml* Column II Liquid and solid concentration µCi/ml** Phosphorous (15) P 32 2 x 10-4 Platinum (78) Pt 191 Pt 193m Pt 197m Pt 197 1 x 10-3 1 x 10-2 1 x 10-2 1 x 10-3 Polonium (84) Po 210 7 x 10-6 Potassium (19) K 42 3 x 10-3 Praseodymium(59) Pr 142 Pr 143 3 x 10-4 5 x 10-4 Promethium (61) Pm 147 Pm 149 2 x 10-3 4 x 10-4 Radium (88) Ra 226 Ra 228 1 x 10-7 3 x 10-7 Radon (86) Rn 220 Rn 222 1 x 10-8 1 x 10-7 Rhenium (75) Re 183 Re 186 Re 188 6 x 10-3 9 x 10-4 6 x 10-4 Rhodium (45) Rh 103m Rh 105 1 x 10-1 1 x 10-3 Rubidium (37) Rb 86 7 x 10-4 Ruthenium (44) Ru 97 Ru 103 Ru 105 Ru 106 4 x 10-3 8 x 10-4 1 x 10-3 1 x 10-4 Samarium (62) Sm 153 8 x 10-4 Scandium (21) Sc 46 Sc 47 Sc 48 4 x 10-4 9 x 10-4 3 x 10-4 Selenium (34) Se 75 3 x 10-3 Silicon (14) Si 31 9 x 10-3 Silver (47) Ag 105 Ag 110m Ag 111 1 x 10-3 3 x 10-4 4 x 10-4 Sodium (11) Na 24 2 x 10-3 Strontium (38) Sr 85 Sr 89 Sr 91 Sr 92 1 x 10-3 1 x 10-4 7 x 10-4 7 x 10-4 Sulfur (16) S 35 9 x 10-8 6 x 10-4 Element (atomic number) Radionuclide Column I Gas concentration µCi/ml* Column II Liquid and solid concentration µCi/ml** Tantalum (73) Ta 182 4 x 10-4 Technetium (43) Tc 96m Tc 96 1 x 10-1 1 x 10-3 Tellurium (52) Te 125m Te 127m Te 127 Te 129m Te 131m Te 132 2 x 10-3 6 x 10-4 3 x 10-3 3 x 10-4 6 x 10-4 3 x 10-4 Terbium (65) Tb 160 4 x 10-4 Thallium (81) Tl 200 Tl 201 Tl 202 Tl 204 4 x 10-3 3 x 10-3 1 x 10-3 1 x 10-3 Thulium (69) Tm 170 Tm 171 5 x 10-4 5 x 10-3 Tin (50) Sn 113 Sn 125 9 x 10-4 2 x 10-4 Tungsten (74) (Wolfram) W 181 W 187 4 x 10-3 7 x 10-4 Vanadium (23) V 48 3 x 10-4 Xenon (54) Xe 131m Xe 133 Xe 135 4 x 10-6 3 x 10-6 1 x 10-6 Ytterbium (70) Yb 175 1 x 10-3 Yttrium (39) Y 90 Y 91m Y 91 Y 92 Y 93 2 x 10-4 3 x 10-2 3 x 10-4 6 x 10-4 3 x 10-4 Zinc (30) Zn 65 Zn 69m Zn 69 1 x 10-3 7 x 10-4 2 x 10-2 Zirconium (40) Zr 95 Zr 97 6 x 10-4 2 x 10-4 Beta and/or gamma emitting radioactive material not listed above with half-life less than 3 years. 1 x 10-10 1 x 10-6 * Values are given in Column 1 only for those materials normally used as gases. ** µCi/gm for solids. NOTE 1: Many radionuclides disintegrate into nuclides which are also radioactive. In expressing the concentrations in Schedule A the activity stated is that of the parent nuclide and takes into account the daughters. NOTE 2: For purposes of Rule 65 where there is involved a combination of nuclides, the limit for the combination should be derived as follows: Determine for each nuclide in the product the ratio between the concentration present in the product and the exempt concentration established in Schedule A for the specific nuclide when not in combination. The sum of such ratios may not exceed "1" (i.e., unity). EXAMPLE: Concentration of Nuclide A in Product + Concentration of Nuclide B in Product ≤ 1 Exempt concentration of Nuclide A Exempt concentration of Nuclide B