Thanks for the post Lookinout.

I have a pre-employment drug screen (probably) tomorrow and am trying to determine what method would be best to use. I smoked everyday from July to March, stopped for 18 days and passed an at home drug test. After passing that test, I smoked for about a week (1-2 spliffs per day) and stopped. The last time I smoked was 7 days ago, so it will be 8 on test day. I went to the the Sauna on Thursday and then again this afternoon (Sunday). In case I decide to opt for the dilution method, I had steak Friday and then again today to help with my creatinine levels. I was able to pass an at-home test this afternoon by drinking a 32 oz. Powerade and 64 oz. of water. The drug line was faint, but still visible.

If I am able to pass an at home test using the dilution method, will I be able to pass the test at LabCorp with good certainty?

I could also use the substitution method using my roommates urine. My main concern about this is the possibility of their being a two way mirror in the testing room. Why this is obviously a huge violation of privacy, I do not want to rule out the possibility that it could occur. My roommate recently took a pre-employment test at a different facility in town and there was a mirror set in the wall that he thought was suspicious. Although it was a different facility, I want to be as prepared as possible for the test. I couldn't find much on forums about two way mirrors so has anyone ever heard of that?

Any advice would be greatly appreciated. I will be up tonight practicing the substitution method in case I opt for that choice. Thanks!

Also, thanks to BurntToast for all the great advice you have littered throughout these forums.