I worked in a warehouse before, too, and they had the same policy: run into something or drop a load, you have to take a drug test. My advice is stay clean while you learn how to operate a fork lift. Then, once you are proficient at operating the forklift, go ahead and get high again. Just don't show up to work stoned. And because you know you are showing up to work sober every day, *you* know that if anything happens, it's not because of the drugs. If an accident happens and you have to take a drug test when you smoke on your own time, tell them to fuck off and quit.

Like BigHomie said, it's just a low level retail job at Home Depot. Just make sure there are other places in town where you can work.