1. Regulations
  2. title 10
  3. chapter I
  4. part 30
  5. subjgrp 90
  6. § 30.70

View all text of Subjgrp 90 [§ 30.70 - § 30.72]

§ 30.70 - Schedule A—Exempt concentrations.

[See footnotes at end of this table]

Element (atomic number) Isotope Col. I Col. II Gas concentration µCi/ml 1Liquid and solid concentration µCi/ml 2Antimony (51)Sb 1223 × 10−4Sb 1242 × 10−4Sb 1251 × 10−3Argon (18)A 371 × 10−3A 414 × 10−7Arsenic (33)As 735 × 10−3As 745 × 10−4As 762 × 10−4As 778 × 10−4Barium (56)Ba 1312 × 10−3Ba 1403 × 10−4Beryllium (4)Be 72 × 10−2Bismuth (83)Bi 2064 × 10−4Bromine (35)Br 824 × 10−73 × 10−3Cadmium (48)Cd 1092 × 10−3Cd 115m3 × 10−4Cd 1153 × 10−4Calcium (20)Ca 459 × 10−5Ca 475 × 10−4Carbon (6)C 141 × 10−68 × 10−3Cerium (58)Ce 1419 × 10−4Ce 1434 × 10−4Ce 1441 × 10−4Cesium (55)Cs 1312 × 10−2Cs 134m6 × 10−2Cs 1349 × 10−5Chlorine (17)Cl 389 × 10−74 × 10−3Chromium (24)Cr 512 × 10−2Cobalt (27)Co 575 × 10−3Co 581 × 10−3Co 605 × 10−4Copper (29)Cu 643 × 10−3Dysprosium (66)Dy 1654 × 10−3Dy 1664 × 10−4Erbium (68)Er 1699 × 10−4Er 1711 × 10−3Europium (63)Eu 1526 × 10−4(T/2 = 9.2 Hrs) Eu 1552 × 10−3Fluorine (9)F 182 × 10−68 × 10−3Gadolinium (64)Gd 1532 × 10−3Gd 1598 × 10−4Gallium (31)Ga 724 × 10−4Germanium (32)Ge 712 × 10−2Gold (79)Au 1962 × 10−3Au 1985 × 10−4Au 1992 × 10−3Hafnium (72)Hf 1817 × 10−4Hydrogen (1)H 35 × 10−63 × 10−2Indium (49)In 113m1 × 10−2In 114m2 × 10−4Iodine (53)I 1263 × 10−92 × 10−5I 1313 × 10−92 × 10−5I 1328 × 10−86 × 10−4I 1331 × 10−87 × 10−5I 1342 × 10−71 × 10−3Iridium (77)Ir 1902 × 10−3Ir 1924 × 10−4Ir 1943 × 10−4Iron (26)Fe 558 × 10−3Fe 596 × 10−4Krypton (36)Kr 85m1 × 10−6Kr 853 × 10−6Lanthanum (57)La 1402 × 10−4Lead (82)Pb 2034 × 10−3Lutetium (71)Lu 1771 × 10−3Manganese (25)Mn 523 × 10−4Mn 541 × 10−3Mn 561 × 10−3Mercury (80)Hg 197m2 × 10−3Hg 1973 × 10−3Hg 2032 × 10−4Molybdenum (42)Mo 992 × 10−3Neodymium (60)Nd 1476 × 10−4Nd 1493 × 10−3Nickel (28)Ni 651 × 10−3Niobium (Columbium) (41)Nb 951 × 10−3Nb 979 × 10−3Osmium (76)Os 1857 × 10−4Os 191m3 × 10−2Os 1912 × 10−3Os 1936 × 10−4Palladium (46)Pd 1033 × 10−3Pd 1099 × 10−4Phosphorus (15)P 322 × 10−4Platinum (78)Pt 1911 × 10−3Pt 193m1 × 10−2Pt 197m1 × 10−2Pt 1971 × 10−3Potassium (19)K 423 × 10−3Praseodymium (59)Pr 1423 × 10−4Pr 1435 × 10−4Promethium (61)Pm 1472 × 10−3Pm 1494 × 10−4Rhenium (75)Re 1836 × 10−3Re 1869 × 10−4Re 1886 × 10−4Rhodium (45)Rh 103m1 × 10−1Rh 1051 × 10−3Rubidium (37)Rb 867 × 10−4Ruthenium (44)Ru 974 × 10−4Ru 1038 × 10−4Ru 1051 × 10−3Ru 1061 × 10−4Samarium (62)Sm 1538 × 10−4Scandium (21)Sc 464 × 10−4Sc 479 × 10−4Sc 483 × 10−4Selenium (34)Se 753 × 10−3Silicon (14)Si 319 × 10−3Silver (47)Ag 1051 × 10−3Ag 110m3 × 10−4Ag 1114 × 10−4Sodium (11)Na 242 × 10−3Strontium (38)Sr 851 × 10−4Sr 891 × 10−4Sr 917 × 10−4Sr 927 × 10−4Sulfur (16)S 359 × 10−86 × 10−4Tantalum (73)Ta 1824 × 10−4Technetium (43)Tc 96m1 × 10−1Tc 961 × 10−3Tellurium (52)Te 125m2 × 10−3Te 127m6 × 10−4Te 1273 × 10−3Te 129m3 × 10−4Te 131m6 × 10−4Te 1323 × 10−4Terbium (65)Tb 1604 × 10−4Thallium (81)Tl 2004 × 10−3Tl 2013 × 10−3Tl 2021 × 10−3Tl 2041 × 10−3Thulium (69)Tm 1705 × 10−4Tm 1715 × 10−3Tin (50)Sn 1139 × 10−4Sn 1252 × 10−4Tungsten (Wolfram) (74)W 1814 × 10−3W 1877 × 10−4Vanadium (23)V 483 × 10−4Xenon (54)Xe 131m4 × 10−6Xe 1333 × 10−6Xe 1351 × 10−6Ytterbium (70)Yb 1751 × 10−3Yttrium (39)Y 902 × 10−4Y 91m3 × 10−2Y 913 × 10−4Y 926 × 10−4Y 933 × 10−4Zinc (30)Zn 651 × 10−3Zn 69m7 × 10−4Zn 692 × 10−2Zirconium (40)Zr 956 × 10−4Zr 972 × 10−4Beta and/or gamma emitting byproduct material not listed above with half-life less than 3 years1 × 10−101 × 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:

[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]

AUTHORITY: Atomic Energy Act of 1954, secs. 11, 81, 161, 181, 182, 183, 184, 186, 187, 223, 234, 274 (42 U.S.C. 2014, 2111, 2201, 2231, 2232, 2233, 2234, 2236, 2237, 2273, 2282, 2021); Energy Reorganization Act of 1974, secs. 201, 202, 206, 211 (42 U.S.C. 5841, 5842, 5846, 5851); 44 U.S.C. 3504 note.

CITE AS: 10 CFR 30.70