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
|
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:
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)
