One last thing....since he was such a heavy smoker make sure he completely loads up with water (takes about 1 1/2 hours) and pee about 8-9 times before testing. I'm not sure if it would work, but I would sure love to hear the outcome. OH....if he is starting to get nausious then his electrolytes are down due to water loading...drink a shot of salty water and he will feel better in about 15-20 minutes. If you get the result you want today, repeat for Monday.