The sticky thread on dillution at this site should be helpful. It is a long read but worth the time for folks in your spot. Only time can remove the THC from your body as previously stated. The dillution is just for the days prior and up the day when you are tested. It is just to make sure your sample is dilluted but does not raise alarms.

There is advice for folks who need to do a hair test on this site as well.

Update the site with the results.
rudy2010 Reviewed by rudy2010 on . Upcoming test... Please help!!! Hey everyone, I am a 5'11" male that weighs about 230 pounds and I used to smoke about 2 times a day for like 5 years. I have only smoked about 5-6 times since October 18th and have not smoked at all since October 27th. I have to take a urine test in order to be admitted into nursing school. The results of the test need to be in before December 15th and I was planning on taking the test on December 10th. Should i be clean by the 10th? That will have been 43 days since I last smoked but I was Rating: 5