kordite

I have a pre-employment test tomorrow with Quest (at a Scott&White Clinic). My employer just told me to go in there and let them know who I am with and they would administer the test so I have no idea what kind of test it is going to be. (Lab or instant?)

The employer is not any type of government or safety type position (computer company) and they told me they do it for a discount on their health insurance.

I am about 5'7" 200~ pounds, drink water regularly. Last time I smoked was about 7 days ago, (1/2 bowl). I bought a few home drug tests and took one yesterday (From CVS - First Check Home) and I passed it. I took one today that was the same brand but checked also for methamphitamines and I passed it but the thing I am worried about is that the line on the THC side was very faint. I know the manual says that even though it is faint it is still considered negative but it has me worried that I may not pass a laboratory test.

Should I dilute? Or what should I do?

My employer told me that if for any reason I fail the test I can take it again but I don't want to fail it the first time for any reason.