I can see someone else has already gone here. About what I would say as well, but with the following addition... You actually believed a manager about this?!!! Most managers I have worked for have absolutely no clue about the real work - only how to delegate responsibility to someone who does know the ins and outs of a certain work station’s function or area of expertise. I have yet to see a manager be able to accomplish the work of their delegated employee, let alone explain it properly in all my 26 years of working in several industries.
“You actually believed a manager about this?”
No, I did not. He said there were security issues that I was not aware of (I was a commercial customer, showing up with the stuff to be irradiated). Why should I believe someone whose job depended on the security of his company?