How Long Does Marijuana Stay In The System If I Only Smoked Once How Long Does Marijuana Stay In My System?

How long does marijuana stay in my system? - how long does marijuana stay in the system if i only smoked once

Smoking In 16, 6'3 and 150 kilos of marijuana in that year and the current date june/14th/2009. In my previous life I smoked weed about 5 times viewed. The last time I was smoking June/10/2009 and as I said not much smoke, me and my friends share, represented a cent bag grass regularly. How long does it take from my system? I can not detox pills. Perhaps soon find a job and ask to test a drug. I drink lots of water. What are household items that are not for my system? It relies heavily on the water? Please help me, my parents would be upset if they found that I find to be smoked, especially if I smoked marijuana.
Thank you guys for help