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...she stated under oath that she used to pass her drug test at work by putting a drop of bleach in her urine. Now, I believe this was to clear the marijuana from her urine but I just thought it was interesting - never heard of this before.
As I recall, bleach effectively destroys the sample, so a quick test (dipping a special card in the sample) might come up false negative, but if the sample were sent out to a lab, they would quickly detect that it was an altered sample, unsuitable for analysis. Most PO departments are well aware of this ruse, but many PO's (& apparently this woman's employer) might be too lazy or cheap to send the sample out for lab analysis.
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