South Carolina Code of Regulations
Chapter 61 - DEPARTMENT OF HEALTH AND ENVIRONMENTAL CONTROL
Subchapter 61-63 - Radioactive Materials (Title A)
Part II - LICENSING OF RADIOACTIVE MATERIAL
Section 61-63.II.RHA 2.25 - Schedule C-Exempt Concentrations

Element (Atomic Number)

Isotope

Column I Gas concentrationuc/ml [FN1]

Column II Liquid and solid concentration uc/ml [FN2]

Antimony (51) .....

Sb 122

3 x 10-4

Sb 124

2 x 10-5

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 10-4

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 (85) ......

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

6 x 10-4

(T/2 = 9.2 Hrs)

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 10-4

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 10-5

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 149

3 x 10-3

Nd 147

6 x 10-4

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

Polonium (84) .....

Po 210

2 x 10-10

7 x 10-6

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

Radium (88) .......

Ra 226

1 x 10-11

1 x 10-7

Ra 228

2 x 10-11

3 x 10-7

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 10-3

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 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

1 x 10-1

Tc 96

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

4 x 10-3

Tl 201

3 x 10-3

Tl 202

1 x 10-3

Tl 204

1 x 10-3

Thulium (69) ......

Tm 170

5 x 10-4

Tm 171

5 x 10-3

Tin (50) ..........

Sn 113

9 x 10-4

Sn 125

2 x 10-4

Tungston (Wolfram) (74) ............

W 181

4 x 10-3

W 187

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

radioactive

material not

listed above

with half-life

less than 3

years................................

1 x 10-10

1 x 10-6

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

NOTE 2: For purposes of 2.19.2.1 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 C for the specific isotope when not in combination. The sum of such ratios may not exceed "1" (i.r., unity).

Example:

Concentration of Isotope A in Product x Exempt concentration of Isotope A Concentration of Isotope B in Product <

Exempt 1

concentration of

Isotope B =

[FN1] Values are given only for those materials normally used as gases.

[FN2] uc/gm for solids.