Any athlete on ADAMS can be called upon for one hours aday to travel to the nesrest testing facility to provide a sample in completely sterile surroundings so that they can't get off doping by making allegations of contamination (I never realised that there were so many testosterone and clenbuterol particles flying around in the atmosphere).
Anyone not on ADAMS needs to be able to travel at any time to a testing facility for the same reason.
Obviously I am being ridiculous but that seems to be the only way that you will accept that a test isn't contaminated. Are you seriously suggesting thwat being in the same rooom as some clenbuterol can cause your sample to become contaminated. I can understand if there is contact with a banned substance, but since you hold the vessel yourself then unless you go wiping your hands on random surfaces, or heaven forbid wiping your genitalia on the surfaces how is this contamination during the test likely to occur.
