I've been exercizing really good for the last 1.5 months but I am still coming up with a faint line. I am not sure, if it is a 15/ng test, that I will come up positive.
By doing a Forum Search with the terms "functionally equivalent metabolites", and "selective methodology", you'll discover that even though their cutoffs numerically differ, a 50 ng assay screen is functionally equivalent to the 15 ng GC/MS.

Edit: Actually, read post#7 of this thread:
http://boards.cannabis.com/drug-test...d-testing.html
Burnt Toast Reviewed by Burnt Toast on . How many ng cutoff is a non federal drug test for marijuana I've been exercizing really good for the last 1.5 months but I am still coming up with a faint line. I am not sure, if it is a 15/ng test, that I will come up positive. I am just wondering what the specifics are. I can't find them on google :/ Rating: 5