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Schedules

§ 30.70 Schedule A--Exempt concentrations.

[See footnotes at the end of this table]

Element (atomic number) Isotope Col. I Col. II
Gas Concentration μCi/ml1 Liquid and Solid Concentration μCi/ml2
Antimony (51) Sb 122   3 x 10-4
Sb 124 2 x 10-4
Sb 125 1 x 10-3
Argon (18) A 37 1 x 10 -3  
A 41 4 x 10 -7
Arsenic (33) As 73   5 x 10-3
As 74 5 x 10-4
As 76 2 x 10-4
As 77 8 x 10-4
Barium (56) Ba 131   2 x 10-3
Ba 140 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   2 x 10-3
Cd 115M 3 x 10-4
Cd 115 3 x 10-4
Calcium (20) Ca 45   9 x 10-5
Ca 47 5 x 10-4
Carbon (6) C 14 1 x 10 -6 8 x 10-3
Cerium (58) Ce 141   9 x 10-4
Ce 143 4 x 10-4
Ce 144 1 x 10-4
Cesium (55) Cs 131   2 x 10-2
Cs 134m 6 x 10-2
Cs 134 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   5 x 10 -3
Co 58 1 x 10 -3
Co 60 5 x 10-4
Copper (29) Cu 64   3 x 10-3
Dysprosium (66) Dy 165   4 x 10-3
Dy 166 4 x 10-4
Erbium (68) Er 169   9 x 10-4
Er 171 1 x 10-3
Europium (63) Eu 152 (T/2=9.2 hrs)   6 x 10-4
Eu 155 2 x 10-3
Fluorine (9) F 18 2 x 10-6 8 x 10-3
Gadolinium (64) Gd 153   2 x 10-3
Gd 159 8 x `0-4
Gallium (31) Ga 72   4 x 10-4
Germanium (32) Ge 71   2 x 10-2
Gold (79) Au 196   2 x 10 -3
Au 198 5 x 10-4
Au 199 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   1 x 10 -2
In 114M 2 x 10-4
Iodine (53) I 126 3 x 10-9 2 x 10-5
I 131 3 x 10-9 2 x 10-5
I 132 8 x 10-8 6 x 10-4
I 133 1 x 10-8 7 x 10-5
I 134 2 x 10-7 1 x 10-3
Iridium (77) Ir 190   2 x 10-3
Ir 192 4 x 10-4
Ir 194 3 x 10-4
Iron (26) Fe 55   8 x 10-3
Fe 59 6 x 10-4
Krypton (36) Kr 85M 1 x 10-6  
Kr 85 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   3 x 10-4
Mn 54 1 x 10-3
Mn 56 1 x 10-3
Mercury (80) Hg 197M   2 x 10-3
Hg 197 3 x 10-3
Hg 203 2 x 10-4
Molybdenum (42) Mo 99   2 x 10-3
Neodymium (60) Nd 147   6 x 10-4
Nd 149 3 x 10-3
Nickel (28) Ni 65   1 x 10-3
Niobium (Columbium) (41) Nb 95   1 x 10-3
Nb 97 9 x 10-3
Osmium (76) Os 185   7 x 10-4
Os 191M 3 x 10-2
Os 191 2 x 10-3
Os 193 6 x 10-4
Palladium (46) Pd 103   3 x 10-3
Pd 109 9 x 10-4
Phosphorus (15) P 32   2 x 10-4
Platinum (78) Pt 191   1 x 10-3
Pt 193M 1 x 10-2
Pt 197M 1 x 10-2
Pt 197 1 x 10-3
Potassium (19) K 42   3 x 10-3
Praseodymium (59) Pr 142   3 x 10-4
Pr 143 5 x 10-4
Promethium (61) Pm 147   2 x 10-3
Pm 149 4 x 10-4
Rhenium (75) Re 183   6 x 10-3
Re 186 9 x 10-4
Re 188 6 x 10-4
Rhodium (45) Rh 103M   1 x 10-1
Rh 105 1 x 10-3
Rubidium (37) Rb 86   7 x 10-4
Ruthenium (44) Ru 97   4 x 10-4
Ru 103 8 x 10-4
Ru 105 1 x 10-3
Ru 106 1 x 10-4
Samarium (62) Sm 153   8 x 10-4
Scandium (21) Sc 46   4 x 10-4
Sc 47 9 x 10-4
Sc 48 3 x 10-4
Selenium (34) Se 75   3 x 10-3
Silicon (14) Si 31   9 x 10-3
Silver (47) Ag 105   1 x 10-3
Ag 110M 3 x 10-4
Ag 111 4 x 10-4
Sodium (11) Na 24   2 x 10-3
Strontium (38) Sr 85   1 x 10-4
Sr 89 1 x 10-4
Sr 91 7 x 10-4
Sr 92 7 x 10-4
Sulfur (16) S 35 9 x 10 -8 6 x 10-4
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   2 x 10-3
Te 127M 6 x 10-4
Te 127 3 x 10-3
Te 129M 3 x 10-4
Te 131M 6 x 10-4
Te 132 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 (Wolfram) (74) W 181
W 187
  4 x 10-3
7 x 10-4
Vanadium (23) V 48   3 x 10-4
Xenon (54) Xe 131M 4 x 10-6  
Xe 133 3 x 10-6
Xe 135 1 x 10-6
Ytterbium (70) Yb 175   1 x 10-3
Yttrium (39) Y 90   2 x 10-4
Y 91M 3 x 10-2
Y 91 3 x 10-4
Y 92 6 x 10-4
Y 93 3 x 10-4
Zinc (30) Zn 65   1 x 10-3
Zn 69M 7 x 10-4
Zn 69 2 x 10-2
Zirconium (40) Zr 95   6 x 10-4
Zr 97 2 x 10-4
Beta and/or gamma emitting byproduct not listed above with half-life less than three years   1 x 10-10 1 x 10-6

Footnotes to Schedule A

  1. Values are given only for those materials normally used as gases.
  2. μCi/gm for solids.

NOTE 1: Many radioisotopes disintegrate into isotopes which are also radioactive. In expressing the concentrations in Schedule A, the activity stated is that of the parent isotope and takes into account the daughters.

NOTE 2: For purposes of 30.14 where there is involved a combination of isotopes, the limit for the combination should be derived as follows: Determine for each isotope in the product the ratio between the concentration present in the product and the exempt concentration established in Schedule A for the specific isotope when not in combination. The sum of such ratios may not exceed "1" (i.e., unity).

Example:

Equation showing the relationship described in Note 2 for two example isotopes

[30 FR 8185, June 26, 1965, as amended at 35 FR 3982, Mar. 3, 1970; 38 FR 29314, Oct. 24, 1973; 59 FR 5520, Feb. 7, 1994]

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