before work, i observed two co-workers smoking a substance out of a glass pipe in their car in the parking lot before work. afterwards, they show symptoms of pot consumption, slow reaction time, annoying to be around, slurred speech, half-closed eyes. these employees operate company vehicles throughout their shift and they're horrible to work around, especially when they start burning out towards the end of the shift. i do not want to talk to my supervisor about it because i do not trust this supervisor. is the 1800 number an appropriate number to use? will it really work? what is the number?