High Anxiety, seeking input

[Burnt Toast]

But does a positive test have to be positive for both EMIT and GC/MS??

Yes it does.

What if I'm negative EMIT and positive GC/MS?

It doesnt work that way. Labs will not run a confirmation GC/MS on a urine sample that tested negative on the initial EMIT screen. It would be a big waste of time and most importantly, money. GC/MS testing is not cheap. It must be understood that labs are like any other business - they are in to making a profit and they are not going to run unnecessary tests which could eat away at their bottom line.

If a urine sample tests negative on the initial screen, the testing is over then as a "passing" status.