In the event of a radiation safety related emergency, please contact the Health Physics Department at ext. 24226, or Security at ext. 88 after working hours.

Exemption Quantities

There is opportunity for lesser restriction for labs permitted less than an Exemption Quantity as determined by Health Physics.

Examples of Exemption Quantities are listed below:

Isotope	EQ (Bq)
H-3 (HTO)	1. E+09
H-3 (OBT)	1. E+09
C-11	1. E+06
C-14	1. E+07
F-18	1. E+06
Na-24	1. E+05
P-32	1. E+05
P-33	1. E+08
S-35	1. E+08
Cl-36	1. E+06
K-42	1. E+06
Ca-45	1. E+07
Ca-47	1. E+06
Cr-51	1. E+07
Co-57	1. E+06
Mn-54	1. E+06
Fe-55	1. E+06
Fe-59	1. E+06
Mn-56	1. E+05
Co-60	1. E+05
Cu-64	1. E+06
Zn-65	1. E+06
Br-82	1. E+06
Rb-86	1. E+05
Sr-90	1. E+04
Y-90	1. E+05
Tc-99	1. E+07
Cd-109	1. E+06
Ag-110m	1. E+06
In-111	1. E+06
I-123	1. E+07
I-125	1. E+06
I-129	1. E+05
I-131	1. E+06
Cs-134	1. E+04
Pm-147	1. E+04
TI-204	1. E+04
Am-241	1. E+04
Cm-244	1. E+04