Code of Maine Rules › 10 - DEPARTMENT OF HEALTH AND HUMAN SERVICES › 144 - DEPARTMENT OF HEALTH AND HUMAN SERVICES - GENERAL › Chapter 220 - Rules Relating to Radiation Protection › Part C - LICENSING OF RADIOACTIVE MATERIAL › Schedule A - EXEMPT CONCENTRATIONS OF RADIOACTIVE MATERIALS WHICH ARE INTRODUCED INTO PRODUCTS (PART C.3.A)

Current through 2024-29, July 17, 2024
Column I
Column I
Element
(atomic number)
Isotope
Gas Concentration
µCi/ml11
Liquid and Solid Concentration
µCi/ml12
Antimony (51)
Sb-122
3X10-4
Sb-124
2X10-4
Sb-125
1X10-3
Argon (18)
Ar-37
1X10-3
Ar-41
4X10-7
Arsenic (33)
As-73
5X10-3
As-74
5X10-4
As-76
2X10-4
As-77
8X10-4
Barium (56)
Ba-131
2X10-3
Ba-140
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
2X10-3
Cd-115m
3X10-4
Cd-115
3X10-4
Calcium (20)
Ca-45
9X10-5
Ca-47
5X10-4
Carbon (6)
C-14
1X10-6
8X10-3
Cerium (58)
Ce-141
9X10-4
Ce-143
4X10-4
Ce-144
1X10-4
Cesium (55)
Cs-131
2X10-2
Cs-134m
6X10-2
Cs-134
9X10-5
Chlorine (17)
Cl-38
9X10-7
4X10-3
Chromium (24)
Cr-51
2X10-2
Cobalt (27)
Co-57
5X10-3
Co-58
1X10-3
Co-60
5X10-4
Copper (29)
Cu-64
3X10-3
Dysprosium (66)
Dy-165
4X10-3
Dy-166
4X10-4
Erbium (68)
Er-169
9X10-4
Er-171
1X10-3
11 Values are given in Column I
					 only for those materials normally used as gases.
12
										µCi/gm for
					 solids.
Column I
Column II
Element
(atomic number)
Isotope
Gas Concentration
µCi/ml13
Liquid and Solid Concentration
µCi/ml14
Europium (63)
Eu-152
6X10-4
(Tr=9.2 hr)
Eu-155
2X10-3
Fluorine (9)
F-18
2X10-6
8X10-3
Gadolinium (64)
Gd-153
2X10-3
Gd-159
8X10-4
Gallium (31)
Ga-72
4X10-4
Germanium (32)
Ge-71
2X10-2
Gold (79)
Au-196
2X10-3
Au-198
5X10-4
Au-199
2X10-3
Hafnium (72)
Hf-181
7X10-4
Hydrogen (1)
H-3
5X10-6
3X10-2
Indium (49)
In-113m
1X10-2
In-114m
2X10-4
Iodine (53)
I-126
3X10-9
2X10-5
I-131
3X10-9
2X10-5
I-132
8X10-8
6X10-4
I-133
1X10-8
7X10-5
I-134
2X10-7
1X10-3
Iridium (77)
Ir-190
2X10-3
Ir-192
4X10-4
Ir-194
3X10-4
Iron (26)
Fe-55
8X10-3
Fe-59
6X10-4
Krypton (36)
Kr-85m
1X10-6
Kr-85
3X10-6
Lanthanum (57)
La-140
2X10-4
Lead (82)
Pb-203
4X10-3
Lutetium (71)
Lu-177
1X10-3
Manganese (25)
Mn-52
3X10-4
Mn-54
1X10-3
Mn-56
1X10-3
Mercury (80)
Hg-197m
2X10-3
Hg-197
3X10-3
Hg-203
2X10-4
Molybdenum (42)
Mo-99
2X10-3
Neodymium (60)
Nd-147
6X10-4
Nd-149
3X10-3
Nickel (28)
Ni-65
1X10-3
Niobium (Columbium) (41)
Nb-95
1X10-3
Nb-97
9X10-3
13 Values are given in Column I
					 only for those materials normally used as gases.
14
										µCi/gm for
					 solids.
Column I
Column II
Element
(atomic number)
Isotope
Gas Concentration
µCi/ml15
Liquid and Solid Concentration
µCi/ml16
Osmium (76)
Os-185
7X10-4
Os-191m
3X10-2
Os-191
2X10-3
Os-193
6X10-4
Palladium (46)
Pd-103
3X10-3
Pd-109
9X10-4
Phosphorus (15)
P-32
2X10-4
Platinum (78)
Pt-191
1X10-3
Pt-193m
1X10-2
Pt-197m
1X10-2
Pt-197
1X10-3
Potassium (19)
K-42
3X10-3
Praseodymium (59)
Pr-142
3X10-4
Pr-143
5X10-4
Promethium (61)
Pm-147
2X10-3
Pm-149
4X10-4
Rhenium (75)
Re-183
6X10-3
Re-186
9X10-4
Re-188
6X10-4
Rhodium (45)
Rh-103m
1X10-1
Rh-105
1X10-3
Rubidium (37)
Rb-86
7X10-4
Ruthenium (44)
Ru-97
4X10-3
Ru-103
8X10-4
Ru-105
1X10-3
Ru-106
1X10-4
Samarium (62)
Sm-153
8X10-4
Scandium (21)
Sc-46
4X10-4
Sc-47
9X10-4
Sc-48
3X10-4
Selenium (34)
Se-75
3X10-3
Silicon (14)
Si-31
9X10-3
Silver (47)
Ag-105
1X10-3
Ag-110m
3X10-4
Ag-111
4X10-4
Sodium (11)
Na-24
2X10-3
Strontium (38)
Sr-85
1X10-3
Sr-91
7X10-4
Sr-92
7X10-4
Sulfur (16)
S-35
9X10-8
6X10-4
Tantalum (73)
Ta-182
4X10-4
15 Values are given in Column I
					 only for those materials normally used as gases.
16
										µCi/gm for
					 solids.
Column I
Column II
Element
(atomic number)
Isotope
Gas Concentration
µCi/ml17
Liquid and Solid Concentration
µCi/ml18
Technetium (43)
Tc-96m
1X10-1
Sr-89
1X10-4
Tc-96
1X10-3
Tellurium (52)
Te-125m
2X10-3
Te-127m
6X10-4
Te-127
3X10-3
Te-129m
3X10-4
Te-131m
6X10-4
Te-132
3X10-4
Terbium (65)
Tb-160
4X10-4
Thallium (81)
Tl-200
4X10-3
Tl-201
3X10-3
Tl-202
1X10-3
Tl-204
1X10-3
Thulium (69)
Tm-170
5X10-4
Tm-171
5X10-3
Tin (50)
Sn-113
9X10-4
Sn-125
2X10-4
Tungsten (Wolfram) (74)
W-181
4X10-3
W-187
7X10-4
Vanadium (23)
V-48
3X10-4
Xenon (54)
Xe-131m
4X10-6
Xe-133
3X10-6
Xe-135
1X10-6
Ytterbium (70)
Yb-175
1X10-3
Yttrium (39)
Y-90
2X10-4
Y-91m
3X10-2
Y-91
3X10-4
Y-92
6X10-4
Y-93
3X10-4
Zinc (30)
Zn-65
1X10-3
Zn-69m
7X10-4
Zn-69
2X10-2
Zirconium (40)
Zr-95
6X10-4
Zr-97
2X10-4
Beta and/or gamma emitting radioactive
								material not listed above with half-life fewer than three years
1X10-10
1X10-6
17 Values are given in Column I
					 only for those materials normally used as gases.
18 Ci/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 Part C 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 Schedule A for the specific isotope when not in
					 combination. The sum of such ratios may not exceed "1" ((i)e., unity).
EXAMPLE:
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					 to view image
NOTE 3: To convert µCi/ml to SI units of
					 megabecquerels per liter multiply the above values by 37.