Why did I test positive for cocaine when I've never touched …
In the case of cocaine, 150 nanograms per milliliter of benzoylecgonine would result in a positive test. All of this is to say that although there's a lot of science that goes into the workings of a UDS, they're susceptible to the occasional false positive. A false positive happens when the epitopes bind to a metabolite that is structurally ...
