Ok, here’s the situation:
I hadn’t smoked grass in years (about ten). Back in the college days I was an occasional smoker, and never did any other drugs.
About a week ago an opportunity presented itself and I smoked a little pot for old times sake. As an aside, the immediate sleepiness reminded me why I stopped.
Today I had a job offer out of the blue. However, there is a drug test.
Here is what I have been able to determine: 1. urinalysis will only show positive for a few days after a one-time user uses. No sweat. Besides, for light users the solution is dilution, as in drink lots of water and coffee (the effects of dilution can be compensated for by the tester with multiple tests to get the baseline of other analytes, but since pre-employment screens are one-shot deals, this isn’t an issue). 2. For urinalysis, there is a cutoff level below which the presence of THC metabolites is not considered positive (this allows for casual contact, such as attending a Greatful Dead concert without actually smoking). 3. Hair testing is all the rage, and a MA company recently got 510(k) approval for a hair test. Hair testing can pick up use from between 5 days (the time required for the contaminated part of the hair to exit the scalp) and 90 days.
Finally, here are the questions:
-Is there a lower cutoff level for hair testing (a level below which the presence of THC metabolites is not considered a positive result)?
-Is the hair test sensitive enough to detect one use in three to six months worth of hair growth?