Pre-Employment Test Detoxing

Hey all, hope this is the right place to post this.

So, a little background first. I've been looking for a job for after graduation for a while now, but only started really doing it seriously. I quit smoking completely for two weeks, but my coworker offered me a tiny bit of weed, so I decided to relax the job search for a week or so and indulge. I smoked about a bowl and a half on Monday night and half a bowl on Tuesday night.

Well, I actually got an e-mail today from the hiring manager of one of the companies I applied for asking to schedule a phone interview for Friday. Luckily, its a high paying job so there will multiple in-person interviews if I make it past the phone one and I live in California, so I can't be drug tested until I have been extended a formal offer of employment and I certainly don't expect that to happen for 2-3 weeks at the very earliest.

I'm 6"2' 140 pounds, very skinny. I don't go to the gym, but I work 7 hour shifts as a barista where I am on my feet all day and I walk about 3-4 miles per week outside of that. Because of the employment possibility, I'm planning to go on a vegetarian diet, drink lots of tea, and work out for an hour or so a day.

Anyone got any idea on my odds of passing assuming 2-3 weeks clean of use? I know people are different, but I figure people might be able to ballpark it.