When I was under the "random testing" procedure, a positive reading was all it took. If you wanted to dispute the findings, they retested, using the same urine supplied during the prior test. We made various things for many different airlines, so we fell under FAA rules. No doubt a different standard. This was prior to 9/11/2001.
When we gave samples, we could turn away from the observer. Are you saying they had to face you? I would be in there for days! It took a long time before even my wife could watch me go.
