Table 2 Exempt Concentrations
|
Element (atomic
number)
|
|
Column I
Gas
concentration
( C/ml1) |
Column II
Liquid and solid
concentration
( C/ml2) |
|
|
|
|
|
|
Antimony (51)
|
Sb 122
|
. . . . . .
|
3E-4
|
|
|
Sb 124
|
. . . . . .
|
2E-4
|
|
|
Sb 125
|
. . . . . .
|
1E-3
|
|
Argon (18)
|
A 37
|
1E-8
|
. . . . . . .
|
|
|
A 41
|
4E-7
|
. . . . . . .
|
|
Arsenic (33)
|
As 73
|
. . . . . .
|
5E-3
|
|
|
As 74
|
. . . . . .
|
5E-4
|
|
|
As 76
|
. . . . . .
|
2E-4
|
|
|
As 77
|
. . . . . .
|
8E-4
|
|
Barium (56)
|
Ba 131
|
. . . . . .
|
2E-3
|
|
|
Ba 140
|
. . . . . .
|
3E-4
|
|
Beryllium (4)
|
Be 7
|
. . . . . .
|
2E-2
|
|
Bismuth (83)
|
Bi 206
|
. . . . . .
|
4E-4
|
|
Bromine (35)
|
Br 82
|
4E-7
|
3E-3
|
|
Cadmium (48)
|
Cd 109
|
. . . . . .
|
2E-3
|
|
|
Cd 115m
|
. . . . . .
|
3E-4
|
|
|
Cd 115
|
. . . . . .
|
3E-4
|
|
Calcium (20)
|
Ca 45
|
. . . . . .
|
9E-5
|
|
|
Ca 47
|
. . . . . .
|
5E-4
|
|
Carbon (6)
|
C 14
|
1E-6
|
8E-3
|
|
Cerium (58)
|
Ce 141
|
. . . . . .
|
9E-4
|
|
|
Ce 143
|
. . . . . .
|
4E-4
|
|
|
Ce 144
|
. . . . . .
|
1E-4
|
|
Cesium (55)
|
Cs 131
|
. . . . . .
|
2E-2
|
|
|
Cs 134m
|
. . . . . .
|
6E-2
|
|
|
Cs 134
|
. . . . . .
|
9E-5
|
|
Chlorine (17)
|
Cl 38
|
9E-7
|
4E-3
|
|
Chromium (24)
|
Cr 51
|
. . . . . .
|
2E-2
|
|
Cobalt (27)
|
Co 57
|
. . . . . .
|
5E-3
|
|
|
Co 58
|
. . . . . .
|
1E-3
|
|
|
Co 60
|
. . . . . .
|
5E-4
|
|
Copper (29)
|
Cu 64
|
. . . . . .
|
3E-3
|
|
Dysprosium (66)
|
Dy 165
|
. . . . . .
|
4E-3
|
|
|
Dy 166
|
. . . . . .
|
4E-4
|
|
Erbium (68)
|
Er 169
|
. . . . . .
|
9E-4
|
|
|
Er 171
|
. . . . . .
|
1E-3
|
|
Europium (63)
|
Eu 152
|
. . . . . .
|
6E-4
|
|
|
(T/2=9.2Hrs.)
|
|
|
|
|
Eu 155
|
. . . . . .
|
2E-3
|
|
Fluorine (9)
|
F 18
|
2E-6
|
8E-3
|
|
Gadolinium (64)
|
Gd 153
|
. . . . . .
|
2E-3
|
|
|
Gd 159
|
. . . . . .
|
8E-4
|
|
Gallium (31)
|
Ga 72
|
. . . . . .
|
4E-4
|
|
Germanium(32)
|
Ge 71
|
. . . . . .
|
2E-2
|
|
Gold (79)
|
Au 196
|
. . . . . .
|
2E-3
|
|
|
Au 198
|
. . . . . .
|
5E-4
|
|
|
Au 199
|
. . . . . .
|
2E-3
|
|
Hafnium (72)
|
Hf 181
|
. . . . . .
|
7E-4
|
|
Hydrogen (1)
|
H 3
|
5E-6
|
3E-2
|
|
Indium (49)
|
In 113m
|
. . . . . .
|
1E-2
|
|
|
In 114m
|
. . . . . .
|
2E-4
|
|
Iodine (53)
|
I 126
|
3E-9
|
2E-5
|
|
|
I 131
|
3E-9
|
2E-5
|
|
|
I 132
|
8E-8
|
6E-4
|
|
|
I 133
|
1E-8
|
7E-5
|
|
|
I 134
|
2E-7
|
1E-3
|
|
Iridium (77)
|
Ir 190
|
. . . . . .
|
2E-3
|
|
|
Ir 192
|
. . . . . .
|
4E-4
|
|
|
Ir 194
|
. . . . . .
|
3E-4
|
|
Iron (26)
|
Fe 55
|
. . . . . .
|
8E-3
|
|
|
Fe 59
|
. . . . . .
|
6E-4
|
|
Krypton (36)
|
Kr 85m
|
1E-6
|
. . . . . .
|
|
|
Kr 85
|
3E-6
|
. . . . . .
|
|
Lanthanum (57)
|
La 140
|
. . . . . .
|
2E-4
|
|
Lead (82)
|
Pb 203
|
. . . . . .
|
4E-3
|
|
Lutetium (71)
|
Lu 177
|
. . . . . .
|
1E-3
|
|
Manganese (25)
|
Mn 52
|
. . . . . .
|
3E-4
|
|
|
Mn 54
|
. . . . . .
|
1E-3
|
|
|
Mn 56
|
. . . . . .
|
1E-3
|
|
Mercury (80)
|
Hg 197m
|
. . . . . .
|
2E-3
|
|
|
Hg 197
|
. . . . . .
|
3E-3
|
|
|
Hg 203
|
. . . . . .
|
2E-4
|
|
Molybdenum (42)
|
Mo 99
|
. . . . . .
|
2E-3
|
|
Neodymium (60)
|
Nd 147
|
. . . . . .
|
6E-4
|
|
|
Nd 149
|
. . . . . .
|
3E-3
|
|
Nickel (28)
|
Ni 65
|
. . . . . .
|
1E-3
|
|
Niobium (Columbium)
(41)
|
Nb 95
|
. . . . . .
|
1E-3
|
|
|
Nb 97
|
. . . . . .
|
9E-3
|
|
Osmium (76)
|
Os 185
|
. . . . . .
|
7E-4
|
|
|
Os 191m
|
. . . . . .
|
3E-2
|
|
|
Os 191
|
. . . . . .
|
2E-3
|
|
|
Os 193
|
. . . . . .
|
6E-4
|
|
Palladium (46)
|
Pd 103
|
. . . . . .
|
3E-3
|
|
|
Pd 109
|
. . . . . .
|
9E-4
|
|
Phosphorus (15)
|
P 32
|
. . . . . .
|
2E-4
|
|
Platinum (78)
|
Pt 191
|
. . . . . .
|
1E-3
|
|
|
Pt 193m
|
. . . . . .
|
1E-2
|
|
|
Pt 197m
|
. . . . . .
|
1E-2
|
|
|
Pt 197
|
. . . . . .
|
1E-3
|
|
Polonium (84)
|
Po 210
|
2E-10
|
7E-6
|
|
Potassium (19)
|
K 42
|
. . . . . .
|
3E-3
|
|
Praseodymium (59)
|
Pr 142
|
. . . . . .
|
3E-4
|
|
|
Pr 143
|
. . . . . .
|
5E-4
|
|
Promethium (61)
|
Pm 147
|
. . . . . .
|
2E-3
|
|
|
Pm 149
|
. . . . . .
|
4E-4
|
|
Radium (88)
|
Ra 226
|
1E-11
|
1E-7
|
|
|
Ra 228
|
2E-11
|
3E-7
|
|
Rhenium (75)
|
Re 183
|
. . . . . .
|
6E-3
|
|
|
Re 186
|
. . . . . .
|
9E-4
|
|
|
Re 188
|
. . . . . .
|
6E-4
|
|
Rhodium (45)
|
Rh 103m
|
. . . . . .
|
1E-1
|
|
|
Rh 105
|
. . . . . .
|
1E-3
|
|
Rubidium (37)
|
Rb 86
|
. . . . . .
|
7E-4
|
|
Ruthenium (44)
|
Ru 97
|
. . . . . .
|
4E-3
|
|
|
Ru 103
|
. . . . . .
|
8E-4
|
|
|
Ru 105
|
. . . . . .
|
1E-3
|
|
|
Ru 106
|
. . . . . .
|
1E-4
|
|
Samarium (62)
|
Sm 153
|
. . . . . .
|
8E-4
|
|
Scandium (21)
|
Sc 46
|
. . . . . .
|
4E-4
|
|
|
Sc 47
|
. . . . . .
|
9E-4
|
|
|
Sc 48
|
. . . . . .
|
3E-4
|
|
Selenium (34)
|
Se 75
|
. . . . . .
|
3E-3
|
|
Silicon (14)
|
Si 31
|
. . . . . .
|
9E-3
|
|
Silver (47)
|
Ag 105
|
. . . . . .
|
1E-3
|
|
|
Ag 110m
|
. . . . . .
|
3E-4
|
|
|
Ag 111
|
. . . . . .
|
4E-4
|
|
Sodium (11)
|
Na 24
|
. . . . . .
|
2E-3
|
|
Strontium (38)
|
Sr 85
|
. . . . . .
|
1E-3
|
|
|
Sr 89
|
. . . . . .
|
1E-4
|
|
|
Sr 91
|
. . . . . .
|
7E-4
|
|
|
Sr 92
|
. . . . . .
|
7E-4
|
|
Sulfur (16)
|
S 35
|
9E-8
|
6E-4
|
|
Tantalum (73)
|
Ta 182
|
. . . . . .
|
4E-4
|
|
Technetium (43)
|
Tc 96m
|
. . . . . .
|
1E-1
|
|
|
Tc 96
|
. . . . . .
|
1E-3
|
|
Tellurium (52)
|
Te 125m
|
. . . . . .
|
2E-3
|
|
|
Te 127m
|
. . . . . .
|
6E-4
|
|
|
Te 127
|
. . . . . .
|
3E-3
|
|
|
Te 129m
|
. . . . . .
|
3E-4
|
|
|
Te 131m
|
. . . . . .
|
6E-4
|
|
|
Te 132
|
. . . . . .
|
3E-4
|
|
Terbium (65)
|
Tb 160
|
. . . . . .
|
4E-4
|
|
Thallium (81)
|
Tl 200
|
. . . . . .
|
4E-3
|
|
|
Tl 201
|
. . . . . .
|
3E-3
|
|
|
Tl 202
|
. . . . . .
|
1E-3
|
|
|
Tl 204
|
. . . . . .
|
1E-3
|
|
Thulium (69)
|
Tm 170
|
. . . . . .
|
5E-4
|
|
|
Tm 171
|
. . . . . .
|
5E-3
|
|
Tin (50)
|
Sn 113
|
. . . . . .
|
9E-4
|
|
|
Sn 125
|
. . . . . .
|
2E-4
|
|
Tungsten (Wolfram)
(74)
|
W 181
|
. . . . . .
|
4E-3
|
|
|
W 187
|
. . . . . .
|
7E-4
|
|
Vanadium (23)
|
V 48
|
. . . . . .
|
3E-4
|
|
Xenon (54)
|
Xe 131m
|
4E-6
|
. . . . . .
|
|
|
Xe 133
|
3E-6
|
. . . . . .
|
|
|
Xe 135
|
1E-6
|
. . . . . .
|
|
Ytterbium (70)
|
Yb 175
|
. . . . . .
|
1E-3
|
|
Yttrium (39)
|
Y 90
|
. . . . . .
|
2E-4
|
|
|
Y 91m
|
. . . . . .
|
3E-2
|
|
|
Y 91
|
. . . . . .
|
3E-4
|
|
|
Y92
|
. . . . . .
|
6E-4
|
|
|
Y 93
|
. . . . . .
|
3E-4
|
|
Zinc (30)
|
Zn 65
|
. . . . . .
|
1E-3
|
|
|
Zn 69m
|
. . . . . .
|
7E-4
|
|
|
Zn 69
|
. . . . . .
|
2E-2
|
|
Zirconium (40)
|
Zr 95
|
. . . . . .
|
6E-4
|
|
|
Zr 97
|
. . . . . .
|
2E-4
|
|
Beta and/or gamma
emitting radioactive material not listed above with half-life less than 3
years.
|
|
1E-10
|
1E-6
|
|
Alpha emitting
radioactive material (other than special nuclear material) not listed above.
|
|
1E-12
|
1E-8
|
1 Values are given only for those radionuclides normally used as
gases.
2 c/gm for solids.
Note 1: Many radionuclides disintegrate into daughter products which are also radioactive. In expressing the concentrations in Table 2 the activity stated is that of the parent radionuclide and takes into account the radioactive daughter products.
Note 2: For purposes of Table 1, subdivision (a), where there is present a combination of radionuclides, the limit for the combination shall be derived as follows: Determine for each radionuclide present the ratio between the concentration of the radionuclide in the combination and the exempt concentration listed in Table 2. The sum of such ratios shall not exceed unity.

Appendix 16-A Index
|