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sigh, it's amazing how little people know about drug tests...
Here's what I learned when I was working for the BOP and had to deal with all the lab corespondense on drug tests...
First of all, if you buy any of the head shop shit or use bleach or anything, the test WILL show up as tampered with or diluted. They not only test for drugs but for concentration of certain chemicals that are in urine naturally. Depending on who's testing him, a diluted test IS A DIRTY TEST.
Second, the duration of marijuana detectability entirely depends on how much your bro smoked. A single use is detectable for 3 days at the most. Moderate use (4x a week): 4 days, Heavy use (daily) 10 days, Chronic Heavy Use: 21-27 days.
There you go, straight from the CA BOP testing labs. Hope it was helpful.
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