Also...if you are fat it takes longer to clear from your system as you don't burn it off as fast as thinner people. It sits in your fat cells. Drinking lots of water and exercising helps.
When you give a sample, take it from the third (or more) **** off the day, don't take it from the start or end of the stream. **** a little, stop, fill cup, then finish. Start and end of stream is stronger.
Also...gas chromometer tests are expensive. I have heard a lot of firms do the paper strip test, which is very cheap, then if there is a positive reading they do more extensive testing.
Most masking agents either don't work, or they test for the agent.
Good info here: http://www.release.org.uk/
And this is what they have to say about testing:
Drug testing
Cannabis can be detected in urine samples (the usual method of testing). Smoking a joint a couple of nights a week may take 21-28 days to clear the system. Heavy cannabis use can be detected for around 42 -56 days after cessation.
The detection periods vary depending on the testing equipment used, your metabolism and amount of cannabis taken.
They are an excellent charity.
I recently had a few weeks off work (random testing) I haven't smoked for a year. Rang them and asked what tests likely to reveal if I smoked 3 grams of skunk. Was old maybe 21 days.
Had a urine test with them 14 days later and passed (just)
