Opinions - popped two days prior to drug test

[gehseh]

my cousin (let's call him "bill") applied for an entry level job that is highly relevant to his future career choice, sadly he did not anticipate a response so quickly from the company and got a call the morning after he popped for an interview scheduled two days later...
now this is a highly corporate company and will more than likely test him for recreational drug use, are there any system cleansers out that could help him get clean before the impending test?
for perspective "bill" has not popped for 8 months since this latest time and hasn't used any other illegal substances this entire year, will that play a factor in how quickly his metabolism handles the e?