You should read this thread because you got railroaded by the tech.

http://boards.cannabis.com/drug-test...oz-enough.html

If they try to fail you for 60 mls then they have to write down why they are failing you and note how much you gave them on the chain of custody forms and eventually you'll win your case so to speak.

Estimate how much of your own urine you gave, how dirty it was in ng per ml and multiple those together then add that to how many mls of clean urine you gave multipled by zero and then divide that number by total mls of urine given.