I would say you'll pass OK, with that length of time passed ... it's all about 'accumulated levels', (as it was explained to me by a 'professional pisspot holder' with a phD) ... occasional use usually won't trigger it ... as previously mentioned, the typical 'scans' aren't real scientific, but 'post-accident testing' is usually very thorough, they'll spend the $$ for the high-tech test ... I had to piss-test immediately once, because an old lady scraped my properly-parked truck, while I was inside the warehouse :wtf: ... ANY incident, will require post-accident testing, the potential liability really has the trucking companies running scared ... :smokin: