Ruthenium-106   0.1   0.001

Samarium-151   1   0.01

Samarium-153   10   0.1

Scandium-46   1   0.01

Scandium-47   10   0.1

Scandium-48   1   0.01

Selenium-75   1   0.01

Silicon-31   10   0.1

Silver-105   1   0.01

Silver-110m   0.1   0.001

Silver-111   10   0.1

Sodium-22   0.1   0.001

Sodium-24   1   0.01

Strontium-85m   1,000   10

Type B License Type C License

Column I Column II

Radioactive Material curies curies

Strontium-85   1   0.01

Strontium-89   1   0.01

Strontium-90   0.01   0.0001

Strontium-91   10   0.1

Strontium-92   10   0.1

Sulphur-35   10   0.1

Tantalum-182   1   0.01

Technetium-96   10   0.1

Technetium-97m   10   0.1

Technetium-97   10   0.1

Technetium-99m   100   1.

Technetium-99   1   0.01