10 CFR 39.39 - Records of material use.
(2) In the case of unsealed licensed material used for subsurface tracer studies, the radionuclide and quantity of activity used in a particular well and the disposition of any unused tracer materials;
(3) The identity of the logging supervisor who is responsible for the licensed material and the identity of logging assistants present; and
Title 10 published on 2015-01-01.
No entries appear in the Federal Register after this date, for 10 CFR Part 39.