Minn. R. 4731.2440
DISPOSAL OF SPECIFIC WASTES
A. A licensee may dispose of the following licensed material as if it were not radioactive: (1) 0.05 microcurie (1.85 kBq) or less of hydrogen-3 or carbon-14 per gram of medium used for liquid scintillation counting; and (2) 0.05 microcurie (1.85 kBq) or less of hydrogen-3 or carbon-14 per gram of animal tissue, averaged over the weight of the entire animal. B. A licensee may not dispose of tissue under item A, subitem (2), in a manner that would permit its use as food for humans or as animal feed. C. A licensee must maintain records of disposal under this part according to part 4731.2560 .