Quote Originally Posted by Anonymous1987
Morning of the test. I had a terrible nightmare so I am definitely scared. Home testing kit was for 50ng and the second line was so faint I'm pretty sure I won't pass. I had my friend pee in a bag for me and I'm going to put it in a 2oz bottle and crotch it. Weather is 105 today so I'm not worried about the temp. Just in case something goes awry, I'm continuing to drink cranberry juice and my natural detox tea (the tea isn't to help you pass a drug test it's one of those natural healthy lifestyle things). I know back in 2005 using older pee wasn't a good idea, when I take the test my friends urine will be 15 hours old. Should I dilute hers with some of my own in the test just to make sure the pH levels and smell and everything is "normal"? Again, I'm assuming this test will be for 15ng.
continuing where Burnt left off, if you check out the substitution stickie here: http://boards.cannabis.com/drug-test...uidelines.html
the suggestion is if the urine is going to be sitting for more than 8 hours, it should be refrigerated or frozen. The reason is not completely clear, but I do know after 24 hours or so it WILL begin to culture bacteria.

Burnt is right, adding in your own dirty urine too is counterproductive and pointless if you already have enough volume of clean urine. Remember, yellow doesn't necessarily mean not diluted, like Burnt said too, just make sure the donor didn't drink large amounts of fluid before donating your sample.