EMIT drug test for new job

[IHrtHalucingens]

So swim is getting a new job requiring a full physical and drug test. He went in the other day and had the physical and took the emit drug test. He passed but was flagged for dilute urine. So he is going back in to retake the drug test. This is his last chance at it. The issue is he was told by the doctor that the test looked normal so he smoked weed at a concert later that night. He has 7 days to prepare.

Swims questions are: How effective is the aspirin method? If he doesnt dilute will the aspirin be sufficient? If not will creatine loading work? He took a bunch about 24 hours before the first test but still turned up dilute. Is more time needed for ut to be metabolized into creatinine? Swim has creatine monohydrate powder the suggested dose is 5g he took 15g last time. How many grams should he take per day and for how many days in advance?

Swim has done his research but the info varies. Id like some advice from someone with a more scientific knowledge of the test and methods. Thank you in advance.