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A standard urine test would be clean but, if they tested your hair it would show up.
When testing hair samples the common practice is to obtain enough hair to cover 90 days.
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We have been experiencing problems with the chat system for the last few days. Our engineers are working on it. However, I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)
As a board certified medical review officer (MRO) - I would like to give a 2nd opinion:
The detection period for marijuana is much shorter than most internet references would seem to suggest. Even NORML - a strong opponent of drug testing references this fact on their website:http://norml.org/news/2006/02/23/marijuana-detection-time-shorter-than-previously-assumedDetection beyond 30 days is really rare. Here is a link to the actual paper published in Drug Court Review (the article starts on page 23 of the journal)http://www.ndci.org/sites/default/files/ndci/DCRV5_1.pdfHere is a reference from a laboratory that offers the "zero tolerance" testing with thresholds of 20 ng/ml for the screening and 5 ng/ml for confirmation. They advertise an expected detection period of "up to 10 days".http://www.aegislabs.com/About_Aegis/Zero-Tolerance_Drug_Testing/Period_of_Detection_Table