[BassMasterK]

My old singer was on parole and he had to pass them, as well as my drummer, although with him it was further back in high school.

First thing, don't assume that they will leave you alone while you take the piss. This is not the case anymore in most situations. There were too many people pulling the old "I'll just tuck a bottle of my buddes piss in my pocket to keep it body temp (which they do check for right away) and he doesn't smoke". So for the most part they watch you do it.

Next, if you really are only smoking two to three times a month, your best bet is to just stop it at least a month before the test. Chronic users, the THC can stay in their system for a long time. For light users such as yourself, it is often untracable several days after use. I would give yourself a month though to be on the safe side because this is a job and you don't want drama.

Things you can do to help flush your system. Exercise regularly. Stop a good week before the test. From what my friends told me, THC can be stored in your fat cells. Exercising resulting in the burning of fat can release THC that was stored earlier. Drink loads of water, but don't load up the day before the test. The other poster was right, if your piss is too diluted they will call the test a fail, or inconclusive.

Lastly, there is a product that my singer took and I can't remember the name (although I can find out if it is really important to you) where it masked THC. His first piss would come out almost orange. Then after that it looked normal. He passed several UA's while on parole using this stuff.

Since your so occational though, I would just stop it before the test like I mentioned.