Code of Massachusetts Regulations › 105 CMR - DEPARTMENT OF PUBLIC HEALTH › Title 105 CMR 120.000 - The Control of Radiation › RECORDS › Section 120.195 - Appendix A - Exempt Concentrations

Current through Register 1525, July 5, 2024
Element (Atomic Number)
Isotope
Column I Gas Concentration µCi/ml
1
/
Column II Liquid and solid concentration
								µCi/ml
2
/
Antimony (51)
Sb-122
Sb-124
Sb-125
3X10-4
2X10-4
1X10-3
Argon (18)
Ar-37
Ar-41
1X10-3
4X10-7
Arsenic (33)
As-73
As-74
As-76
As-77
5X10-3
5X10-4
2X10-4
8X10-4
Barium (56)
Ba-131
Ba-140
2X10-3
3X10-4
Beryllium (4)
Be-7
2X10-2
Bismuth (83)
Bi-206
4X10-4
Bromine (35)
Br-82
4X10-7
3X10-3
Cadmium (48)
Cd-109
Cd-115m
Cd-115
2X10-3
3X10-4
3X10-4
Calcium (20)
Ca-45
Ca-47
9X10-5
5X10-4
Carbon (6)
C-14
1X10-6
8X10-3
Cerium (58)
Ce-141
Ce-143
Ce-144
9X10-4
4X10-4
1X10-4
Cesium (55)
Cs-131
Cs-134m
Cs-134
2X10-2
6X10-2
9X10-5
Chlorine (17)
Cl-38
9X10-7
4X10-3
Chromium (24)
Cr-51
2X10-2
Cobalt (27)
Co-57
Co-58
Co-60
5X10-3
1X10-3
5X10-4
Copper (29)
Cu-64
3X10-3
Dysprosium (66)
Dy-165
Dy-166
4X10-3
4X10-4
Erbium (68)
Er-169
Er-171
9X10-4
1X10-3
Europium (63)
Eu-152/ (9.2h)
Eu-155
6X10-4
2X10-3
Fluorine (9)
F-18
2X10-6
8X10-3
Gadolinium (64)
Gd-153
Gd-159
2X10-3
8X10-4
Gallium (31)
Ga-72
4X10-4
Germanium (32)
Ge-71
2X10-2
Gold (79)
Au-196
Au-198
Au-199
2X10-3
5X10-4
2X10-3
Hafnium (72)
Hf-181
7X10-4
Hydrogen (1)
H-3
5X10-6
3X10-2
Indium (49)
In-113m
In-114m
1X10-2
2X10-4
Iodine (53)
I-126
I-131
I-132
I-133
I-134
3X10-9
3X10-9
8X10-8
1X10-8
2X10-7
2X10-5
2X10-5
6X10-4
7X10-5
1X10-3
Iridium (77)
Ir-190
Ir-192
Ir-194
2X10-3
4X10-4
3X10-4
Iron (26)
Fe-55
Fe-59
8X10-3
6X10-4
Krypton (36)
Kr-85m
Kr-85
1X10-6
3X10-6
Lanthanum (57)
La-140
2X10-4
Lead (82)
Pb-203
4X10-3
Lutetium (71)
Lu-177
1X10-3
Manganese (25)
Mn-52
Mn-54
Mn-56
3X10-4
1X10-3
1X10-3
Mercury (80)
Hg-197m
Hg-197
Hg-203
2X10-3
3X10-3
2X10-4
Molybdenum (42)
Mo-99
2X10-3
Neodymium (60)
Nd-147
Nd-149
6X10-4
3X10-3
Nickel (28)
Ni-65
1X10-3
Niobium (Columbium) (41)
Nb-95
Nb-97
1X10-3
9X10-3
Osmium (76)
Os-185
Os-191m
Os-191
Os-193
7X10-4
3X10-2
2X10-3
6X10-4
Palladium (46)
Pd-103
Pd-109
3X10-3
9X10-4
Phosphorus (15)
P-32
P-33
2X10-4
1X10-3
Platinum (78)
Pt-191
Pt-193m
Pt-197m
Pt-197
1X10-3
1X10-2
1X10-2
1X10-3
Potassium (19)
K-42
3X10-3
Praseodymium (59)
Pr-142
Pr-143
3X10-4
5X10-4
Promethium (61)
Pm-147
Pm-149
2X10-3
4X10-4
Rhenium (75)
Re-183
Re-186
Re-188
6X10-3
9X10-4
6X10-4
Rhodium (45)
Rh-103m
Rh-105
1X10-1
1X10-3
Rubidium (37)
Rb-86
7X10-4
Ruthenium (44)
Ru-97
Ru-103
Ru-105
Ru-106
4X10-3
8X10-4
1X10-3
1X10-4
Samarium (62)
Sm-153
8X10-4
Scandium (21)
Sc-46
Sc-47
Sc-48
4X10-4
9X10-4
3X10-4
Selenium (34)
Se-75
3X10-3
Silicon (14)
Si-31
9X10-3
Silver (47)
Ag-105
Ag-110m
Ag-111
1X10-3
3X10-4
4X10-4
Sodium (11)
Na-24
2X10-3
Strontium (38)
Sr-85
Sr-89
Sr-91
Sr-92
1X10-3
1X10-4
7X10-4
7X10-4
Sulfur (16)
S-35
9X10-8
6X10-4
Tantalum (73)
Ta-182
4X10-4
Technetium (43)
Tc-96m
Tc-96
1X10-1
1X10-3
Tellurium (52)
Te-125m
Te-127m
Te-127
Te-129m
Te-131m
Te-132
2X10-3
6X10-4
3X10-3
3X10-4
6X10-4
3X10-4
Terbium (65)
Tb-160
4X10-4
Thallium (81)
Tl-200
Tl-201
Tl-202
Tl-204
4X10-3
3X10-3
1X10-3
1X10-3
Thulium (69)
Tm-170
Tm-171
5X10-4
5X10-3
Tin (50)
Sn-113
Sn-125
9X10-4
2X10-4
Tungsten (Wolfram) (74)
W-181
W-187
4X10-3
7X10-4
Vanadium (23)
V-48
3X10-4
Xenon (54)
Xe-131m
Xe-133
Xe-135
4X10-6
3X10-6
1X10-6
Ytterbium (70)
Yb-175
1X10-3
Yttrium (39)
Y-90
Y-91m
Y-91
Y-92
Y-93
2X10-4
3X10-2
3X10-4
6X10-4
3X10-4
Zinc (30)
Zn-65
Zn-69m
Zn-69
1X10-3
7X10-4
2X10-2
Zirconium (40)
Zr-95
Zr-97
6X10-4
2X10-4
Beta and/or gamma emitting radioactive material not
								listed above with half-life of less than three years.
1X10-10
1X10-6
Note 1:
Many radioisotopes transform
				  into isotopes which are also radioactive. In expressing the concentrations in
				  105 CMR 120.195:
Appendix A
, the activity stated is that of
				  the parent isotope and takes into account the daughters.
Note 2:
For purposes of
				  105 CMR
				  120.104(A)  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 radioactivity concentration present in the product and the exempt
				  radioactivity concentration established in 120.195:
Appendix A
for the specific isotope when not in combination. The sum of such ratios may
				  not exceed "1".
Example:
Click to view
				  image
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				  image
Note 3
: To convert µCi/ml to
				  SI units of mega becquerels per liter multiply the above values by 37.
Example: Zirconium (40) Zr-97 (2x10-4 µCi/ml multiplied
				  by 37 is equivalent to 74 x 10-4 MBq/l)