STCs = Special Tritium Compounds
1 = Water (HTO) form
21 = Methyl
2 = Elemental (HT form)
22 = 12 h half-life
3 = water and elemental
23 = 34 yr half-life
4 = Insoluble
24 = 24 h half-life
5 = Soluble
25 = 5 h half-life
6 = Vapor form
26 = 64 h half-life
7 = As CO
27 = 12 h half-life
2
8 = As CO
28 = 16 h half-life
9 = compounds
29 = 2 h half-life
10 = Vapor
30 = 3 h half-life
11 = Inorganic
31 = 1 h half-life
12 = Carbonyl
32 = Organic
13 = 66 min half-life
33 = radon-220 with short-
14 = 122 min half-life
lived progeny
15 = 69 min half-life
34 = with progeny removed
16 = 5 h half-life
35 = with progeny present
17 = 16 min half-life
36 = 1E+05 yr half-life
18 = 6 d half-life
37 = 22 h half-life
19 = 9 h half-life
38 = half-life less than
20 = 10 min half-life
2 hours
For any radionuclide not listed in these tables with decay
mode other than alpha emission or spontaneous fission and
with radioactive half-life less than two hours, the DAC value
shall be 6E-06 uCi/mL (2E+04 Bq/M ).
3
The DAC values listed for both 10CFR20 and 10CFR835
were truncated after being calculated from the appropriate
ALI values. For 10CFR835 the ALI values were taken from
ICRP 68.
105
STCs = Special Tritium Compounds
1 = Water (HTO) form
21 = Methyl
2 = Elemental (HT form)
22 = 12 h half-life
3 = water and elemental
23 = 34 yr half-life
4 = Insoluble
24 = 24 h half-life
5 = Soluble
25 = 5 h half-life
6 = Vapor form
26 = 64 h half-life
7 = As CO
27 = 12 h half-life
2
8 = As CO
28 = 16 h half-life
9 = compounds
29 = 2 h half-life
10 = Vapor
30 = 3 h half-life
11 = Inorganic
31 = 1 h half-life
12 = Carbonyl
32 = Organic
13 = 66 min half-life
33 = radon-220 with short-
14 = 122 min half-life
lived progeny
15 = 69 min half-life
34 = with progeny removed
16 = 5 h half-life
35 = with progeny present
17 = 16 min half-life
36 = 1E+05 yr half-life
18 = 6 d half-life
37 = 22 h half-life
19 = 9 h half-life
38 = half-life less than
20 = 10 min half-life
2 hours
For any radionuclide not listed in these tables with decay
mode other than alpha emission or spontaneous fission and
with radioactive half-life less than two hours, the DAC value
shall be 6E-06 uCi/mL (2E+04 Bq/M ).
3
The DAC values listed for both 10CFR20 and 10CFR835
were truncated after being calculated from the appropriate
ALI values. For 10CFR835 the ALI values were taken from
ICRP 68.
105
STCs = Special Tritium Compounds
1 = Water (HTO) form
21 = Methyl
2 = Elemental (HT form)
22 = 12 h half-life
3 = water and elemental
23 = 34 yr half-life
4 = Insoluble
24 = 24 h half-life
5 = Soluble
25 = 5 h half-life
6 = Vapor form
26 = 64 h half-life
7 = As CO
27 = 12 h half-life
2
8 = As CO
28 = 16 h half-life
9 = compounds
29 = 2 h half-life
10 = Vapor
30 = 3 h half-life
11 = Inorganic
31 = 1 h half-life
12 = Carbonyl
32 = Organic
13 = 66 min half-life
33 = radon-220 with short-
14 = 122 min half-life
lived progeny
15 = 69 min half-life
34 = with progeny removed
16 = 5 h half-life
35 = with progeny present
17 = 16 min half-life
36 = 1E+05 yr half-life
18 = 6 d half-life
37 = 22 h half-life
19 = 9 h half-life
38 = half-life less than
20 = 10 min half-life
2 hours
For any radionuclide not listed in these tables with decay
mode other than alpha emission or spontaneous fission and
with radioactive half-life less than two hours, the DAC value
shall be 6E-06 uCi/mL (2E+04 Bq/M ).
3
The DAC values listed for both 10CFR20 and 10CFR835
were truncated after being calculated from the appropriate
ALI values. For 10CFR835 the ALI values were taken from
ICRP 68.
105
STCs = Special Tritium Compounds
1 = Water (HTO) form
21 = Methyl
2 = Elemental (HT form)
22 = 12 h half-life
3 = water and elemental
23 = 34 yr half-life
4 = Insoluble
24 = 24 h half-life
5 = Soluble
25 = 5 h half-life
6 = Vapor form
26 = 64 h half-life
7 = As CO
27 = 12 h half-life
2
8 = As CO
28 = 16 h half-life
9 = compounds
29 = 2 h half-life
10 = Vapor
30 = 3 h half-life
11 = Inorganic
31 = 1 h half-life
12 = Carbonyl
32 = Organic
13 = 66 min half-life
33 = radon-220 with short-
14 = 122 min half-life
lived progeny
15 = 69 min half-life
34 = with progeny removed
16 = 5 h half-life
35 = with progeny present
17 = 16 min half-life
36 = 1E+05 yr half-life
18 = 6 d half-life
37 = 22 h half-life
19 = 9 h half-life
38 = half-life less than
20 = 10 min half-life
2 hours
For any radionuclide not listed in these tables with decay
mode other than alpha emission or spontaneous fission and
with radioactive half-life less than two hours, the DAC value
shall be 6E-06 uCi/mL (2E+04 Bq/M ).
3
The DAC values listed for both 10CFR20 and 10CFR835
were truncated after being calculated from the appropriate
ALI values. For 10CFR835 the ALI values were taken from
ICRP 68.
105
