Which way do EMT's get drug tested in California?

theres many different ways of getting drug tested before getting hired for a job position. I want to know how emt's get their drug testing done (like pee test or hair follicle saliva etc) reason i want to know is i haven't smoked in almost 2 years now but my friend wants to try it one last go around. i want to do it with him but i am unsure of how i may be tested. if its hair follicle i nkow that lasts for a long time. if pee i know that is out of system pretty fast. let me know ur answers!