Statutes, codes, and regulations
Montana Administrative Code
Department 37 - PUBLIC HEALTH AND HUMAN SERVICESChapter 37.14 - RADIATION CONTROL
Subchapter 37.14.7 - Standards for Protection Against Radiation
Rule 37.14.758 - RECORDS, REPORTS, AND NOTIFICATION: NOTIFICATIONS AND REPORTS TO INDIVIDUALS

Mont. Admin. r. 37.14.758

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Current through Register Vol. 23, December 6, 2024
Rule 37.14.758 - RECORDS, REPORTS, AND NOTIFICATION: NOTIFICATIONS AND REPORTS TO INDIVIDUALS
(1) Requirements for notification and reports to individuals of exposure to radiation or radioactive material are specified in ARM 37.14.1707
(2) When a licensee or registrant is required pursuant to ARM 37.14.756 to report to the department any exposure of an individual to radiation or radioactive material, the licensee or registrant shall also notify the individual. Such notice shall be transmitted at a time not later than the transmittal to the department, and shall comply with the provisions of ARM 37.14.1707(1).

APPENDIX A

CONCENTRATIONS IN AIR AND WATER ABOVE NATURAL BACKGROUND

Table ITable II
Element (atomic number)Isotope1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Actinium (89) Ac-227 Ac-228

S

I

S

I

2x10-12

3x10-11

9x10-8

2x10-8

6x10-5 9x10-3 3x10-3 3x10-3 8x10-14 9x10-13 3x10-9 6x10-10 2x10-6 3x10-4 9x10-5 9x10-5
Americium (95) Am-241 Am-242m Am-242 Am-243 Am-244

S

I

S

I

S

I

S

I

S

I

6x10-12

1x10-10

6x10-12

3x10-10

4x10-8

5x10-8

6x10-12

1x10-10

4x10-6

2x10-5

1x10-4

8x10-4

1x10-4

3x10-3

4x10--3

4x10-3

1x10-4

8x10-4

1x10-1

1x10-1

2x10-13 4x10-12 2x10-13 9x10-12 1x10-9 2x10-9 2x10-13 4x10-12 1x10-7 8x10-74x10-6 3x10-5 4x10-6 9x10-5 1x10-4 1x10-4 4x10-6 3x10-5 5x10-3 5x10-3
Antimony (51) Sb-122 Sb-124 Sb-125

S

I

S

I

S

I

2x10-7 1x10-7 2x10-7 2x10-8 5x10-7 3x10-88x10-4 8x10-4 7x10-4 7x10-4 3x10-3 3x10-3

6x10-9

5x10-9

5x10-9

7x10-10

2x10-8

9x10-10

3x10-5

3x10-5

2x10-5

2x1

1x10-4

1x10-4

Argon (18) Ar-37 Ar-41 Sub2 Sub 6x10-3 2x10-6

---

---

1x10-4 4x10-8--- ---
Arsenic (33) As-73 As-74 As-76 As-77

S

I

S

I

S

I

S

I

2x10-6 4x10-7 3x10-7 1x10-7 1x10-7 1x10-7 5x10-7 4x10-71x10-2 1x10-2 2x10-3 2x10-3 6x10-4 6x10-4 2x10-3 2x10-37x10-8 1x10-8 1x10-8 4x10-9 4x10-9 3x10-9 2x10-8 1x10-8

5x10-4

5x10-4

5x10-5

5x10-5

2x10-5

2x10-5

8x10-5

8x10-5

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number)Isotope1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Astatine (85) At-211

S

I

7x10-9 3x10-85x10-5 2x10-32x10-10 1x10-92x10-6 7x10-5
Barium (56) Ba-131 Ba-140

S

I

S

I

1x10-6 4x10-7 1x10-7 4x10-85x10-3 5x10-3 8x10-4 7x10-44x10-8 1x10-8 4x10-9 1x10-92x10-4 2x10-4 3x10-5 2x10-5
Berkelium (97) Bk-249 Bk-250

S

I

S

I

9x10-10 1x10-7 1x10-7 1x10-62x10-2 2x10-2 6x10-3 6x10-3

3x10-11

4x10-9

5x10-9

4x10-8

6x10-4 6x10-4 2x10-4 2x10-4
Beryllium (4) Be-7

S

I

6x10-6 1x10-65x10-2 5x10-22x10-7 4x10-82x10-3 2x10-3
Bismuth (83) Bi-206 Bi-207 Bi-210 Bi-212

S

I

S

I

S

I

S

I

2x10-7 1x10-7 2x10-7 1x10-8 6x10-9 6x10-9 1x10-7 2x10-7

1x10-3

1x10-3

2x10-3

2x10-3

1x10-3

1x10-3

1x10-2

1x10-2

6x10-9

5x10-9

6x10-9

5x10-10

2x10-10

2x10-10

3x10-9

7x10-9

4x10-5 4x10-5 6x10-5 6x10-5 4x10-5 4x10-5 4x10-4 4x10-4
Bromine (35) Br-82

S

I

1x10-6 2x10-78x10-3 1x10-34x10-8 6x10-93x10-4 4x10-5
Cadmium (48) Cd-109 Cd-115m Cd-115

S

I

S

I

S

I

5x10-8 7x10-8 4x10-8 4x10-8 2x10-7 2x10-7

5x10-3

5x10-3

7x10-4

7x10-4

1x10-3

1x10-3

2x10-9

3x10-9

1x10-9

1x10-9

8x10-9

6x10-9

2x10-4 2x10-4 3x10-5 3x10-5 3x10-5 4x10-5
Calcium (20) Ca-45 Ca-47

S

I

S

I

3x10-8 1x10-7 2x10-7 2x10-73x10-4 5x10-3 1x10-3 1x10-31x10-9 4x10-9 6x10-9 6x10-99x10-6 2x10-4 5x10-5 3x10-5

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number)Isotope1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Californium (98)

Cf-249

Cf-250

Cf-251

Cf-252

Cf-253

Cf-254

S

I

S

I

S

I

S

I

S

I

S

I

2x10-12 1x10-10 5x10-12 1x10-10 2x10-12 1x10-10 6x10-12 3x10-11 8x10-10 8x10-10 5x10-12 5x10-121x10-4 7x10-4 4x10-4 7x10-4 1x10-4 8x10-4 2x10-4 2x10-4 4x10-3 4x10-3 4x10-6 4x10-65x10-14 3x10-12 2x10-13 3x10-12 6x10-14 3x10-12 2x10-13 1x10-12 3x10-11 3x10-11 2x10-13 2x10-134x10-6 2x10-5 1x10-5 3x10-5 4x10-6 3x10-5 7x10-6 7x10-6 1x10-4 1x10-4 1x10-7 1x10-7
Carbon (6)

C-14

(C02)

S

Sub2

4x10-6 5x10-5

2x10-2

---

1x10-7 1x10-6

8x10-4

---

Cerium (58)

Ce-141

Ce-143

Ce-144

S

I

S

I

S

I

4x10-7 2x10-7 3x10-7 2x10-7 1x10-8 6x10-93x10-3 3x10-3 1x10-3 1x10-3 3x10-4 3x10-42x10-8 5x10-9 9x10-9 7x10-9 3x10-10 2x10-109x10-5 9x10-5 4x10-5 4x10-5 1x10-5 1x10-5
Cesium (55)

Cs-131

Cs-134m

Cs-134

Cs-135

Cs-136

Cs-137

S

I

S

I

S

I

S

I

S

I

S

I

1x10-5 3x10-6 4x10-5 6x10-6 4x10-8 1x10-8 5x10-7 9x10-8 4x10-7 2x10-7 6x10-8 1x10-87x10-2 3x10-2 2x10-1 3x10-2 3x10-4 1x10-3 3x10-3 7x10-3 2x10-3 2x10-3 4x10-4 1x10-34x10-7 1x10-7 1x10-6 2x10-7 1x10-9 4x10-10 2x10-8 3x10-9 1x10-8 6x10-9 2x10-9 5x10-102x10-3 9x10-4 6x10-3 1x10-3 9x10-6 4x10-5 1x10-4 2x10-4 9x10-5 6x10-5 2x10-5 4x10-5
Chlorine (17)

Cl-36

Cl-38

S

I

S

I

4x10-7 2x10-8 3x10-6 2x10-62x10-3 2x10-3 1x10-2 1x10-21x10-8 8x10-10 9x10-8 7x10-88x10-5 6x10-5 4x10-4 4x10-4
______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number)Isotope1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Chromium (24) Cr-51

S

I

1x10-5 2x10-65x10-2 5x10-24x10-7 8x10-82x10-3 2x10-3
Cobalt (27)Co-57 Co-58m Co-58 Co-60

S

I

S

I

S

I

S

I

3x10-6

2x10-7

2x10-5

9x10-6

8x10-7

5x10-8

3x10-7

9x10-9

2x10-2

1x10-2

8x10- 2

6x10-2

4x10-3

3x10-3

1x10-3

1x10-3

1x10-7 6x10-9 6x10-7 3x10-7 3x10-8 2x10-9 1x10-8 3x10-105x10-4 4x10-4 3x10-3 2x10-3 1x10-4 9x10-5 5x10-5 3x10-5
Copper (29) Cu-64

S

I

2x10-6 1x10-61x10-2 6x10-37x10-8 4x10-83x10-4 2x10-4
Curium (96)Cm-242 Cm-243 Cm-244 Cm-245

S

I

S

I

S

I

S

I

1x10-10 2x10-10 6x10-12 1x10-10 9x10-12 1x10-10 5x10-12 1x10-107x10-4 7x10-4 1x10-4 7x10-4 2x10-4 8x10-4 1x10-4 8x10-44x10-12 6x10-12 2x10-13 3x10-12 3x10-13 3x10-12 2x10-13 4x10-122x10-5 2x10-5 5x10-6 2x10-5 7x10-6 3x10-5 4x10-6 3x10-5
Cm-246 Cm-247 Cm-248 Cm-249

S

I

S

I

S

I

S

I

5x10-12 1x10-10 5x10-12 1x10-10 6x10-13 1x10-11 1x10-5 1x10-51x10-4 8x10-4 1x10-4 6x10-4 1x10-5 4x10-5 6x10-2 6x10-22x10-13 4x10-12 2x10-13 4x10-12 2x10-14 4x10-13 4x10-7 4x10-74x10-6 3x10-5 4x10-6 2x10-5 4x10-7 1x10-6 2x10-3 2x10-3
Dysprosium (66) Dy-165 Dy-166

S

I

S

I

3x10-6 2x10-6 2x10-7 2x10-71x10-2 1x10-2 1x10-3 1x10-39x10-8 7x10-8 8x10-9 7x10-94x10-4 4x10-4 4x10-5 4x10-5
______________________________

(See notes at end of appendix)

Table I Table II
Element (atomic number)Isotope1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Einsteinium(99)

Es-253

Es-254m

Es-254

Es-255

S

I

S

I

S

I

S

I

8x10-10 6x10-10 5x10-9 6x10-9 2x10-11 1x10-10 5x10-10 4x10-107x10-4 7x10-4 5x10-4 5x10-4 4x10-4 4x10-4 8x10-4 8x10-43x10-11 2x10-11 2x10-10 2x10-10 6x10-13 4x10-12 2x10-11 1x10-112x10-5 2x10-5 2x10-5 2x10-5 1x10-5 1x10-5 3x10-5 3x10-5
Erbium (68)

Er-169

Er-171

S

I

S

I

6x10-7 4x10-7 7x10-7 6x10-73x10-3 3x10-3 3x10-3 3x10-32x10-8 1x10-8 2x10-8 2x10-89x10-5 9x10-5 1x10-4 1x10-4
Europium (63)

Eu-152

(Tr=9.2 hrs)

Eu-152

(Tr=13 yrs)

Eu-154

Eu-155

S

I

S

I

S

I

S

I

4x10-7 3x10-7 1x10-8 2x10-8 4x10-9 7x10-9 9x10-8 7x10-82x10-3 2x10-3 2x10-3 2x10-3 6x10-4 6x10-4 6x10-3 6x10-31x10-8 1x10-8 4x10-10 6x10-10 1x10-10 2x10-10 3x10-9 3x10-96x10-5 6x10-5 8x10-5 8x10-5 2x10-5 2x10-5 2x10-4 2x10-4
Fermium (100)

Fm-254

Fm-255

Fm-256

S

I

S

I

S

I

6x10-8 7x10-8 2x10-8 1x10-8 3x10-9 2x10-94x10-3 4x10-3 1x10-3 1x10-3 3x10-5 3x10-52x10-9 2x10-9 6x10-10 4x10-10 1x10-10 6x10-111x10-4 1x10-4 3x10-5 3x10-5 9x10-7 9x10-7
Fluorine (9) F-18

S

I

5x10-6 3x10-62x10-2 1x10-22x10-7 9x10-88x10-4 5x10-4
Gadolinium(64)

Gd-153

Gd-159

S

I

S

I

2x10-7 9x10-8 5x10-7 4x10-76x10-3 6x10-3 2x10-3 2x10-38x10-9 3x10-9 2x10-8 1x10-82x10-4 2x10-4 8x10-5 8x10-5
______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number)Isotope1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Gallium (31)Ga-72

S

I

2x10-7 2x10-71x10-3 1x10-38x10-9 6x10-94x10-5 4x10-5
Germanium (32)Ge-71

S

I

1x10-5 6x10-65x10-2 5x10-24x10-7 2x10-72x10-3 2x10-3
Gold (79) Au-196 Au-198 Au-199

S

I

S

I

S

I

1x10-6 6x10-7 3x10-7 2x10-7 1x10-6 8x10-75x10-3 4x10-3 2x1-3 1x10-3 5x10-3 4x10-34x10-8 2x10-8 1x10-8 8x10-9 4x10-8 3x10-82x10-4 1x10-4 5x10-5 5x10-5 2x10-4 2x10-4
Hafnium (72) Hf-181

S

I

4x10-8 7x10-82x10-3 2x10-31x10-9 3x10-97x10-5 7x10-5
Holmium (67) Ho-166

S

I

2x10-7 2x10-79x10-4 9x10-47x10-9 6x10-93x10-5 3x10-5
Hydrogen (1) H-3

S

I

Sub2

5x10-6 5x10-6 2x10-3

1x10-1

1x10-1

---

2x10-7 2x10-7 4x10-5

3x10-3

3x10-3

---

Indium (49) In-113m In-114m

S

I

S

I

8x10-6 7x10-6 1x10-7 2x10-84x10-2 4x10-2 5x10-4 5x10-43x10-7 2x10-7 4x10-9 7x10-101x10-3 1x10-3 2x10-5 2x10-5
In-115m In-115

S

I

S

I

2x10-6 2x10-6 2x10-7 3x10-81x10-2 1x10-2 3x10-3 3x10-38x10-8 6x10-8 9x10-9 1x10-94x10-4 4x10-4 9x10-5 9x10-5
______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Iodine (53)I-125

S

I

5x10-9 2x10-74x10-5 6x10-38x10-11 6x10-92x10-7 2x10-4
I-126S8x10-95x10-59x10-113x10-7
I3x10-73x10-31x10-89x10-5
I-129S2x10-91x10-52x10-116x10-8
I7x10-86x10-32x10-92x10-4
I-131S9x10-96x10-51x10-103x10-7
I3x10-72x10-31x10-86x10-5
I-132S2x10-72x10-33x10-98x10-6
I9x10-75x10-33x10-82x10-4
I-133S3x10-82x10-44x10-101x10-6
I2x10-71x10-37x10-94x10-5
I-134S5x10-74x10-36x10-92x10-5
I3x10-62x10-21x10-76x10-4
I-135S1x10-77x10-41x10-94x10-6
I4x10-72x10-31x10-87x10-5
Iridium (77)Ir-190S1x10-66x10-34x10-82x10-4
I4x10-75x10-31x10-82x10-4
Ir-192S1x10-71x10-34x10-94x10-5
I3x10-81x10-39x10-104x10-5
Ir-194S2x10-71x10-38x10-93x10-5
I2x10-79x10-45x10-93x10-5
Iron (26)Fe-55S9x10-72x10-23x10-88x10-4
I1x10-67x10-23x10-82x10-3
Fe-59S1x10-72x10-35x10-96x10-5
I5x10-82x10-32x10-95x10-5
Krypton (36)Kr-87mSub26x10-6---1x10-7---
Kr-85Sub1x10-5---3x10-7---
Kr-87Sub1x10-6---2x10-8---
Kr-88Sub1x10-6---2x10-8---
Lanthanum (57)La-140S2x10-77x10-45x10-92x10-5
I1x10-77x10-44x10-92x10-5

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Lead (82)Pb-203S3x10-61x10-29x10-84x10-4
I2x10-61x10-26x10-84x10-4
Pb-210S1x10-104x10-64x10-121x10-7
I2x10-105x10-38x10-122x10-4
Pb-212S2x10-86x10-46x10-102x10-5
I2x10-85x10-47x10-102x10-5
Lutetium (71)Lu-177S6x10-73x10-32x10-81x10-4
I5x10-73x10-32x10-81x10-4
Manganese (25)Mn-52S2x10-71x10-37x10-93x10-5
I1x10-79x10-45x10-93x10-5
Mn-54S4x10-74x10-31x10-81x10-4
I4x10-83x10-31x10-91x10-4
Mn-56S8x10-74x10-33x10-81x10-4
I5x10-73x10-32x10-81x10-4
Mercury (80)Hg-197mS7x10-76x10-33x10-82x10-4
I8x10-75x10-33x10-82x10-4
Hg-197S1x10-69x10-34x10-83x10-4
I3x10-61x10-29x10-85x10-4
Hg-203S7x10-85x10-42x10-92x10-5
I1x10-73x10-34x10-91x10-4
Molybdenum(42)Mo-99S7x10-75x10-33x10-82x10-4
I2x10-71x10-37x10-94x10-5
Neodymium (60)Nd-144S8x10-112x10-33x10-127x10-5
I3x10-102x10-31x10-118x10-5
Nd-147S4x10-72x10-31x10-86x10-5
I2x10-72x10-38x10-96x10-5
Nd-149S2x10-68x10-36x10-83x10-4
I1x10-68x10-35x10-83x10-4
Neptunium (93)Np-237S4x10-129x10-51x10-133x10-6
I1x10-109x10-44x10-123x10-5
Np-239S8x10-74x10-33x10-81x10-4
I7x10-74x10-32x10-81x10-4

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Nickel (28)Ni-59S5x10-76x10-32x10-82x10-4
I8x10-76x10-23x10-82x10-3
Ni-63S6x10-88x10-42x10-93x10-5
I3x10-72x10-21x10-87x10-4
Ni-65S9x10-74x10-33x10-81x10-4
I5x10-73x10-32x10-81x10-4
Niobium (41)Nb-93mS1x10-71x10-24x10-94x10-4
I2x10-71x10-25x10-94x10-4
Nb-95S5x10-73x10-32x10-81x10-4
I1x10-73x10-33x10-91x10-4
Nb-97S6x10-63x10-22x10-79x10-4
I5x10-63x10-22x10-79x10-4
Osmium (76)Os-185S5x10-72x10-32x10-87x10-5
I5x10-82x10-32x10-97x10-5
Os-191mS2x10-57x10-26x10-73x10-3
I9x10-67x10-23x10-72x10-3
Os-191S1x10-65x10-34x10-82x10-4
I4x10-75x10-31x10-82x10-4
Os-193S4x10-72x10-31x10-86x10-5
I3x10-72x10-39x10-95x10-5
Palladium (46)Pd-103S1x10-61x10-25x10-83x10-4
I7x10-78x10-33x10-83x10-4
Pd-109S6x10-73x10-32x10-89x10-5
I4x10-72x10-31x10-87x10-5
Phosphorus(15)P-32S7x10-85x10-42x10-92x10-5
I8x10-87x10-43x10-92x10-5

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Platinum (78)Pt-191S8x10-74x10-33x10-81x10-4
I6x10-73x10-32x10-81x10-4
Pt-193mS7x10-63x10-22x10-71x10-3
I5x10-63x10-22x10-71x10-3
Pt-193S1x10-63x10-24x10-89x10-4
I3x10-75x10-21x10-82x10-3
Pt-197mS6x10-63x10-22x10-71x10-3
I5x10-63x10-22x10-79x10-4
Pt-197S8x10-74x10-33x10-81x10-4
I6x10-73x10-32x10-81x10-4
Plutonium (94)Pu-238S2x10-121x10-47x10-145x10-6
I3x10-118x10-41x10-123x10-5
Pu-239S2x10-121x10-46x10-145x10-6
I4x10-118x10-41x10-123x10-5
Pu-240S2x10-121x10-46x10-145x10-6
I4x10-118x10-41x10-123x10-5
Pu-241S9x10-117x10-33x10-122x10-4
I4x10-84x10-21x10-91x10-3
Pu-242S2x10-121x10-46x10-145x10-6
I4x10-119x10-41x10-123x10-5
Pu-243S2x10-61x10-26x10-83x10-4
I2x10-61x10-28x10-83x10-4
Pu-244S2x10-121x10-46x10-144x10-6
I3x10-113x10-41x10-121x10-5
Polonium (84)Po-210S5x10-102x10-52x10-117x10-7
I2x10-108x10-47x10-123x10-5
Potassium (19)K-42S2x10-69x10-37x10-83x10-4
I1x10-76x10-44x10-92x10-5
Praseodymium (59)Pr-142S2x10-79x10-47x10-93x10-5
I2x10-79x10-45x10-93x10-5
Pr-143S3x10-71x10-31x10-85x10-5
I2x10-71x10-36x10-95x10-5

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Promethium (61)Pm-147S6x10-86x10-32x10-92x10-4
I1x10-76x10-33x10-92x10-4
Pm-149S3x10-71x10-31x10-84x10-5
I2x10-71x10-38x10-94x10-5
Protactinium (91)Pa-230S2x10-97x10-36x10-112x10-4
I8x10-107x10-33x10-112x10-4
Pa-231S1x10-123x10-54x10-149x10-7
I1x10-108x10-44x10-122x10-5
Pa-233S6x10-74x10-32x10-81x10-4
I2x10-73x10-36x10-91x10-4
Radium (88)Ra-223S2x10-92x10-56x10-117x10-7
I2x10-101x10-48x10-124x10-6
Ra-224S5x10-97x10-52x10-102x10-6
I7x10-102x10-42x10-115x10-6
Ra-226S3x10-114x10-73x10-123x10-8
I5x10-119x10-42x10-123x10-5
Ra-228S7x10-118x10-72x10-123x10-8
I4x10-117x10-41x10-123x10-5
Radon (86)Rn-220S3x10-7---1x10-8---
Rn-2223S3x10-8---3x10-9---
Rhenium (75)Re-183S3x10-62x10-29x10-86x10-4
I2x10-78x10-35x10-93x10-4
Re-186S6x10-73x10-32x10-89x10-5
I2x10-71x10-38x10-95x10-5
Re-187S9x10-67x10-23x10-73x10-3
I5x10-74x10-22x10-82x10-3
Re-188S4x10-72x10-31x10-86x10-5
I2x10-79x10-46x10-93x10-5
Rhodium (45)Rh-103mS8x10-54x10-13x10-61x10-2
I6x10-53x10-12x10-61x10-2
Rh-105S8x10-74x10-33x10-81x10-4
I5x10-73x10-32x10-81x10-4

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Rubidium (37)Rb-86S3x10-72x10-31x10-87x10-5
I7x10-87x10-42x10-92x10-5
Rb-87S5x10-73x10-32x10-81x10-4
I7x10-85x10-32x10-92x10-4
Ruthenium (44)Ru-97S2x10-61x10-28x10-84x10-4
I2x10-61x10-26x10-83x10-4
Ru-103S5x10-72x10-32x10-88x10-5
I8x10-82x10-33x10-98x10-5
Ru-105S7x10-73x10-32x10-81x10-4
I5x10-73x10-32x10-81x10-4
Ru-106S8x10-84x10-43x10-91x10-5
I6x10-93x10-42x10-101x10-5
Samarium (62)Sm-147S7x10-112x10-32x10-126x10-5
I3x10-102x10-39x10-127x10-5
Sm-151S6x10-81x10-22x10-94x10-4
I1x10-71x10-25x10-94x10-4
Sm-153S5x10-72x10-32x10-88x10-5
I4x10-72x10-31x10-88x10-5
Scandium (21)Sc-46S2x10-71x10-38x10-94x10-5
I2x10-81x10-38x10-104x10-5
Sc-47S6x10-73x10-32x10-89x10-5
I5x10-73x10-32x10-89x10-5
Sc-48S2x10-78x10-46x10-93x10-5
I1x10-78x10-45x10-93x10-5
Selenium (34)Se-75S1x10-69x10-34x10-83x10-4
I1x10-78x10-34x10-93x10-4
Silicon (14)Si-31S6x10-63x10-22x10-79x10-4
I1x10-66x10-33x10-82x10-4

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Silver (47)Ag-105S6x10-73x10-32x10-81x10-4
I8x10-83x10-33x10-91x10-4
Ag-110mS2x10-79x10-47x10-93x10-5
I1x10-89x10-43x10-103x10-5
Ag-111S3x10-71x10-31x10-84x10-5
I2x10-71x10-38x10-94x10-5
Sodium (11)Na-22S2x10-71x10-36x10-94x10-5
I9x10-99x10-43x10-103x10-5
Na-24S1x10-66x10-34x10-82x10-4
I1x10-78x10-45x10-93x10-5
Strontium (38)Sr-85mS4x10-52x10-11x10-67x10-3
I3x10-52x10-11x10-67x10-3
Sr-85S2x10-73x10-38x10-91x10-4
I1x10-75x10-34x10-92x10-4
Sr-89S3x10-83x10-43x10-103x10-6
I4x10-88x10-41x10-93x10-6
Sr-90S1x10-91x10-53x10-113x10-7
I5x10-91x10-32x10-104x10-5
Sr-91S4x10-72x10-32x10-87x10-5
I3x10-71x10-39x10-95x10-5
Sr-92S4x10-72x10-32x10-87x10-5
I3x10-72x10-31x10-86x10-5
Sulfur (16)S-35S3x10-72x10-39x10-96x10-5
I3x10-78x10-39x10-93x10-4
Tantalum (73)Ta-182S4x10-81x10-31x10-94x10-5
I2x10-81x10-37x10-104x10-5

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Technetium(43)Tc-96mS8x10-54x10-13x10-61x10-2
I3x10-53x10-11x10-61x10-2
Tc-96S6x10-73x10-32x10-81x10-4
I2x10-71x10-38x10-95x10-5
Tc-97mS2x10-61x10-28x10-84x10-4
I2x10-75x10-35x10-92x10-4
Tc-97S1x10-55x10-24x10-72x10-3
I3x10-72x10-21x10-88x10-4
Tc-99mS4x10-52x10-11x10-66x10-3
I1x10-58x10-25x10-73x10-3
Tc-99S2x10-61x10-27x10-83x10-4
I6x10-85x10-32x10-92x10-4
Tellurium (52)Te-125mS4x10-75x10-31x10-82x10-4
I1x10-73x10-34x10-91x10-4
Te-127mS1x10-72x10-35x10-96x10-5
I4x10-82x10-31x10-95x10-5
Te-127S2x10-68x10-36x10-83x10-4
I9x10-75x10-33x10-82x10-4
Te-129mS8x10-81x10-33x10-93x10-5
I3x10-86x10-41x10-92x10-5
Te-129S5x10-62x10-22x10-78x10-4
I4x10-62x10-21x10-78x10-4
Te-131mS4x10-72x10-31x10-86x10-5
I2x10-71x10-36x10-94x10-5
Te-132S2x10-79x10-47x10-93x10-5
I1x10-76x10-44x10-92x10-5
Terbium (65)Tb-160S1x10-71x10-33x10-94x10-5
I3x10-81x10-31x10-94x10-5
Thallium (81)Tl-200S3x10-61x10-29x10-84x10-4
I1x10-67x10-34x10-82x10-4
Tl-201S2x10-69x10-37x10-83x10-4
I9x10-75x10-33x10-82x10-4
Tl-202S8x10-74x10-33x10-81x10-4
I2x10-72x10-38x10-97x10-5
Tl-204S6x10-73x10-32x10-81x10-4
I3x10-82x10-39x10-106x10-5

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Thorium (90)Th-227S3x10-105x10-41x10-112x10-5
I2x10-105x10-46x10-122x10-5
Th-228S9x10-122x10-43x10-137x10-6
I6x10-124x10-42x10-131x10-5
Th-230S2x10-125x10-58x10-142x10-6
I1x10-119x10-43x10-133x10-5
Th-231S1x10-67x10-35x10-82x10-4
I1x10-67x10-34x10-82x10-4
Th-232S3x10-115x10-51x10-122x10-6
I3x10-111x10-31x10-124x10-5
Th-naturalS6x10-116x10-52x10-122x10-6
I6x10-116x10-42x10-122x10-5
Th-234S6x10-85x10-42x10-92x10-5
I3x10-85x10-41x10-92x10-5
Thulium (69)Tm-170S4x10-81x10-31x10-95x10-5
I3x10-81x10-31x10-95x10-5
Tm-171S1x10-71x10-24x10-95x10-4
I2x10-71x10-28x10-95x10-4
Tin (50)Sn-113S4x10-72x10-31x10-89x10-5
I5x10-82x10-32x10-98x10-5
Sn-125S1x10-75x10-44x10-92x10-5
I8x10-85x10-43x10-92x10-5
Tungsten (74)W-181S2x10-61x10-28x10-84x10-4
I1x10-71x10-24x10-93x10-4
W-185S8x10-74x10-33x10-81x10-4
I1x10-73x10-34x10-91x10-4
W-187S4x10-72x10-32x10-87x10-5
I3x10-72x10-31x10-86x10-5

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Uranium (92)U-230S3x10-101x10-41x10-115x10-6
I1x10-101x10-44x10-125x10-6
U-232S1x10-108x10-43x10-123x10-5
I3x10-118x10-49x10-133x10-5
U-233S5x10-109x10-42x10-113x10-5
I1x10-109x10-44x10-123x10-5
U-234S46x10-109x10-42x10-113x10-5
I1x10-109x10-44x10-123x10-5
U-235S45x10-108x10-42x10-113x10-5
I1x10-108x10-44x10-123x10-5
U-236S6x10-101x10-32x10-113x10-5
I1x10-101x10-34x10-123x10-5
U-238S47x10-111x10-33x10-124x10-5
I1x10-101x10-35x10-124x10-5
U-240S2x10-71x10-38x10-93x10-5
I2x10-71x10-36x10-93x10-5
U-naturalS41x10-101x10-35x10-123x10-5
I1x10-101x10-35x10-123x10-5
Vanadium (23)V-48S2x10-79x10-46x10-93x10-5
I6x10-88x10-42x10-93x10-5
Xenon (54)Xe-131mSub22x10-5---4x10-7---
Xe-133mSub1x10-5---3x10-7---
Xe-133Sub1x10-5---3x10-7---
Xe-135Sub4x10-6---1x10-7---
Ytterbium(70)Yb-175S7x10-73x10-32x10-81x10-4
I6x10-73x10-32x10-81x10-4

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
Yttrium (39)Y-90S1x10-76x10-44x10-92x10-5
I1x10-76x10-43x10-92x10-5
Y-91mS2x10-51x10-18x10-73x10-3
I2x10-51x10-16x10-73x10-3
Y-91S4x10-88x10-41x10-93x10-5
I3x10-88x10-41x10-93x10-5
Y-92S4x10-72x10-31x10-86x10-5
I3x10-72x10-31x10-86x10-5
Y-93S2x10-78x10-46x10-93x10-5
I1x10-78x10-45x10-93x10-5
Zinc (30)Zn-65S1x10-73x10-34x10-91x10-4
I6x10-85x10-32x10-92x10-4
Zn-69mS4x10-72x10-31x10-87x10-5
I3x10-72x10-31x10-86x10-5
Zn-69S7x10-65x10-22x10-72x10-3
I9x10-65x10-23x10-72x10-3
Zirconium (40)Zr-93S1x10-72x10-24x10-98x10-4
I3x10-72x10-21x10-88x10-4
Zr-95S1x10-72x10-34x10-96x10-5
I3x10-82x10-31x10-96x10-5
Zr-97S1x10-75x10-44x10-92x10-5
I9x10-85x10-43x10-92x10-5

______________________________

(See notes at end of appendix)

Table ITable II
Element (atomic number) Isotope 1Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)

Any single radionuclide not listed above with decay mode other than alpha emission or spontaneous fission and with radioactive half- life less than 2 hours.

Sub21x10-6---3x10-8---

Any single radionuclide not listed above with decay mode other than alpha emission or spontaneous fission and with radioactive half- life greater than 2 hours.

3x10-99x10-51x10-103x10-6

Any single radionuclide not listed above, which decays by alpha emission or spontaneous fission.

6x10-134x10-72x10-143x10-8

1 Soluble (S); Insoluble (I).

2 "Sub" means that values given are for submersion in a semi-spherical infinite cloud of airborne material.

3 These radon concentrations are appropriate for protection from radon-222 combined with its short-lived daughters. Alternatively, the value in Table I may be replaced by one-third "working level." (A "working level" is defined as any combination of short-lived radon-222 daughters, polonium-218, lead-214, bismuth-214, and polonium-214, in 1 liter of air, without regard to the degree of equilibrium, that will result in the ultimate emission of 1.3 x 105 MeV of alpha particle energy.) The Table II value may be replaced by one-thirtieth (1/30) of a "working level." The limit on radon-222 concentrations in restricted areas may be based on an annual average.

4 For soluble mixtures of U-238, U-234 and U-235 in air chemical toxicity may be the limiting factor. If the percent by weight (enrichment) of U-235 is less than 5, the concentration value for a 40-hour workweek, Table I, is 0.2 milligrams uranium per cubic meter of air average. For any enrichment, the product of the average concentration and time of exposure during a 40-hour workweek shall not exceed 8 x 10-3 SA mCi-hr/ml, where SA is the specific activity of the uranium inhaled. The concentration value for Table II is 0.007 milligrams uranium per cubic meter of air. The specific activity for natural uranium is 6.77 x 10-7 curies per gram uranium. The specific activity for other mixtures of U-238, U-235 and U-234, if not known, shall be:

SA= 3.6 x 10-7 curies/gram U U-depleted

SA= (C.4 + 0.38 E + 0.0034 E2) 10-6 E > 0.72

where E is the percentage by weight of U-235, expressed as percent. Note: In any case where there is a mixture in air or water of more than 1 radionuclide, the limiting values for purposes of this Appendix should be determined as follows:

1. If the identity and concentration of each radionuclide in the mixture are known, the limiting values should be derived as follows: Determine, for each radionuclide in the mixture, the ratio between the quantity present in the mixture and the limit otherwise established in Appendix A for the specific radionuclide when not in a mixture. The sum of such ratios for all the radionuclides in the mixture may not exceed "1" (i.e., "unity"). Example: If radionuclides a, b, and c are present in concentrations Ca, Cb, and Cc, and if the applicable MPC's are MPCa, MPCb, and MPCc respectively, then the concentrations shall be limited so that the following relationship exists:

Ca /MPCa + Cb/ MPCb+ Cc/MPCc <=1

2. If either the identity or the concentration of any radionuclide in the mixture is not known, the limiting values for purposes of Appendix A shall be:
a. For purposes of Table I, Col. 1 - 6x10-13
b. For purposes of Table I, Col. 2 - 4x10-7
c. For purposes of Table II, Col. 1 - 2x10-14
d. For purposes of Table II, Col. 2 - 3x10-8
3. If any of the conditions specified below are met, the corresponding values specified below may be used in lieu of those specified in paragraph 2 above.
a. If the identity of each radionuclide in the mixture is known but the concentration of 1 or more of the radionuclides in the mixture is not known, the concentration limit for the mixture is the limit specified in Appendix A for the radionuclide in the mixture having the lowest concentration limit; or
b. If the identity of each radionuclide in the mixture is not known, but it is known that certain radionuclides specified in Appendix A are not present in the mixture, the concentration limit for the mixture is the lowest concentration limit specified in Appendix A for any radionuclide which is not known to be absent from the mixture; or

Table ITable II
c. Radionuclide Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)Column 1 Air (µCi/ml)Column 2 Water (µCi/ml)
If it is known that SR-90, I-125, I-126, I-129, I-131, (I-133 Table II only), Fb-210, Po-210, At-211, Ra-223, Ra-224, Ra-226, Ac-227, Ra-228, Th-230, Pa-231, Th-232, Th-nat, Cm-248, Cf-254, and Fm-256 are not present............... ---9x10-5---3x10-6
If it is known that SR-90, I-125, I-126, I-129, (I-131, I-133 Table II only), Pb-210, Po-210, Ra-223, Ra-226, Ra-228, Pa-231, Th-nat, Cm-248, Cf-254, and Fm-256 are not present............... ---6x10-5---2x10-6
If it is known that Sr-90, I-129, (I-125, I-126, I-131, Table II only), Pb-210, Ra-226, Ra-228, Cm-248, and Cf-254 are not present................... ---2x10-5---6x10-7
If it is known that (I-129, Table II only), Ra-226, and Ra-228 are not present........... ---3x10-6---1x10-7
If it is known that alpha-emitters and Sr-90, I-129, Pb-210, Ac-227, Ra-228, Pa-230, Pu-241, and Bk-249 are not present........... 3x10-9---1x10-10---
If it is known that alpha-emitters and Pb-210, Ac-227, Ra-228, and Pu-241 are not present.... 3x10-10---11x10-11---
If it is known that alpha-emitters and Ac-227 are not present................... 3x10-12---11x10-12---
If it is known that Ac-227, Th-230, Pa-231, Pu-238, Pu-239, Pu-240, Pu-242, Pu-244, Cm-248, Cf-249 and Cf-241 are not present.... 3x10-12---1x10-13---

4. If a mixture of radionuclides consists of uranium and its daughters in ore dust prior to chemical separation of the uranium from the ore, the values specified below may be used for uranium and its daughters through radium-226, instead of those from paragraph 1, 2, or 3 above.
a. For purposes of Table I, Column 1, 1x10-10 F Ci/ml gross alpha activity; or 5x10-11 F Ci/ml natural uranium; or 75 micrograms per cubic meter of air natural uranium.
b. For purposes of Table II, Column 1, 3x10-12 F Ci/ml gross alpha activity; 2x10-12 F Ci/ml natural uranium; or 3 micrograms per cubic meter of air natural uranium.
5. For purposes of this note, a radionuclide may be considered as not present in a mixture if (a) the ratio of the concentration of that radionuclide in the mixture (Ca) to the concentration limit for that radionuclide specified in Table II of Appendix A (MPCa) does not exceed 1/10, (i.e., Ca/MPCa # 1/10) and (b) the sum of such ratios for all radionuclides considered as not present in the mixture does not exceed 1/4, (i.e., Ca/MPCa + Cb/MPCb +....... # 1/4).

APPENDIX B

(For use in ARM 37.14.725, 37.14.742, and 37.14.743)

MaterialMicrocuries
Americium-2410.01
Antimony-122100
Antimony-12410
Antimony-12510
Arsenic-73100
Arsenic-7410
Arsenic-7610
Arsenic-77100
Barium-13110
Barium-13310
Barium-14010
Bismuth-2101
Bromine-8210
Cadmium-10910
Cadmium-115m10
Cadmium-115100
Calcium-4510
Calcium-4710
Carbon-14100
Cerium-141100
Cerium-143100
Cerium-1441
Cesium-1311,000
Cesium-134m100
Cesium-1341
Cesium-13510
Cesium-13610
Cesium-13710
Chlorine-3610
Chlorine-3810
Chromium-511,000
Cobalt-58m10
Cobalt-5810
Cobalt-601
Copper-64100
Dysprosium-16510
Dysprosium-166100
Erbium-169100
Erbium-171100
Europium-152 (9.2h)100
Europium-152 (13 yr)1
Europium-1541
Europium-15510
Fluorine-181,000

MaterialMicrocuries
Gadolinium-15310
Gadolinium-159100
Gallium-7210
Germanium-71100
Gold-198100
Gold-199100
Hafnium-18110
Holmium-166100
Hydrogen-31,000
Indium-113m100
Indium-114m10
Indium-115m100
Indium-11510
Iodine-1251
Iodine-1261
Iodine-1290.1
Iodine-1311
Iodine-13210
Iodine-1331
Iodine-13410
Iodine-13510
Iridium-19210
Iridium-194100
Iron-55100
Iron-5910
Krypton-85100
Krypton-8710
Lanthanum-14010
Lutetium-177100
Manganese-5210
Manganese-5410
Manganese-5610
Mercury-197m100
Mercury-197100
Mercury-20310
Molybdenum-99100
Neodymium-147100
Neodymium-149100
Nickel-59100
Nickel-6310
Nickel-65100
Niobium-93m10
Niobium-9510
Niobium-9710
Osmium-18510
Osmium-191m100
Osmium-191100
Osmium-193100
Palladium-103100

MaterialMicrocuries
Palladium-109100
Phosphorus-3210
Platinum-191100
Platinum-193m100
Platinum-193100
Platinum-197m100
Platinum-197100
Plutonium-2390.01
Polonium-2100.1
Potassium-4210
Praseodymium-142100
Praseodymium-143100
Promethium-14710
Promethium-14910
Radium-2260.01
Rhenium-186100
Rhenium-188100
Rhodium-103m100
Rhodium-105100
Rubidium-8610
Rubidium-8710
Ruthenium-97100
Ruthenium-10310
Ruthenium-10510
Ruthenium-1061
Samarium-15110
Samarium-153100
Scandium-4610
Scandium-47100
Scandium-4810
Selenium-7510
Silicon-31100
Silver-10510
Silver-110m1
Silver-111100
Sodium-2210
Sodium-2410
Strontium-8510
Strontium-891
Strontium-900.1
Strontium-9110
Strontium-9210
Sulphur-35100
Tantalum-18210
Technetium-9610
Technetium-97m100
Technetium-97100
Technetium-99m100

MaterialMicrocuries
Technetium-9910
Tellurium-125m10
Tellurium-127m10
Tellurium-127100
Tellurium-129m10
Tellurium-129100
Tellurium-131m10
Tellurium-13210
Terbium-16010
Thallium-200100
Thallium-201100
Thallium-202100
Thallium-20410
Thorium (natural) 1100
Thulium-17010
Thulium-17110
Tin-11310
Tin-12510
Tungsten-18110
Tungsten-18510
Tungsten-187100
Uranium (natural) 2100
Uranium-2330.01
Uranium-234
Uranium-2350.01
Vanadium-4810
Xenon-131m1,000
Xenon-133100
Xenon-135100
Ytterbium-175100
Yttrium-9010
Yttrium-9110
Yttrium-92100
Yttrium-93100
Zinc-6510
Zinc-69m100
Zinc-691,000
Zirconium-9310
Zirconium-9510
Zirconium-9710

__________________________

1 Based on alpha disintegration rate of Th-232, Th-230 and their daughter products.

2 Based on alpha disintegration rate of U-238, U-234, and U-235.

Material

Microcuries

Any alpha emitting radionuclide not listed above or mixtures of alpha emitters of unknown composition

 0.01

Any radionuclide other than alpha emitting radionuclides, not listed above or mixtures of beta emitters of unknown composition

 0.1

Note: For purposes of ARM 37.14.725, 37.14.742 and 37.14.743, where there is involved a combination of isotopes in known amounts, the limit for the combination should be derived as follows: determine, for each isotope in the combination, the ratio between the quantity present in the combination and the limit otherwise established for the specific isotope when not in combination may not exceed "1" (i.e., "unity"). Example: For purposes of ARM 37.14.743, if a particular batch contains 20,000 F Ci of Au-198 and 50,000 F Ci of C-14, it may also include not more than 300 F Ci of I-131. This limit was determined as follows:

20,000 µCi Au-198/100,000 µCi + 50,000 µCi C-14/100,000 µCi

+ 300 µCi I-131/1,000 µCi = 1

The denominator in each of the above ratios was obtained by multiplying the figure in the table by 1,000 as provided in ARM 37.14.743.

Mont. Admin. r. 37.14.758

NEW, 1980 MAR p. 1069, Eff. 3/28/80; TRANS, from DHES, 1996 MAR p. 433; TRANS, from DEQ, 2000 MAR p. 189.

Sec. 75-3-201, MCA; IMP, Sec. 75-3-201 and 75-3-204, MCA;