They can only test the last 1 & 1/2 or about 90 days because it becomes inaccurate.

They say over 1 & 1/2 inches of hair that if you smoke 3 times over those 90 days then you could test positive.

What was this "good amount" on 7-4? I do think though if you haven't heard back yet you probably are ok.
FakeBoobsRule Reviewed by FakeBoobsRule on . Am I in the clear? So I went in for a drug test on August 24. I expected it to be just urine testing, but was surprised when it was also hair testing. I passed the urine test, which they tested on the spot, but the hair had to be sent away to the psychemedics lab. I had stopped smoking for the most part in late May. Since then I have smoked twice, July 3rd and 4th, with the time on the 4th being a relatively good quantity. I hadn't cut my hair or anything before going in, and my hair had last been cut Rating: 5