WAC 246-240-272   Decay of strontium-90 sources for ophthalmic treatments.  (1) Only an authorized medical physicist shall calculate the activity of each strontium-90 source that is used to determine the treatment times for ophthalmic treatments. The decay must be based on the activity determined under WAC 246-240-269.

     (2) A licensee shall retain a record of the activity of each strontium-90 source in accordance with WAC 246-240-602.



[Statutory Authority: RCW 70.98.050. 06-05-019, § 246-240-272, filed 2/6/06, effective 3/9/06.]