Yes. However, you don't worth with concrete cutters or 1k volt lines.

Someone who smoked a joint a couple days ago can absolutely work with concrete cutters or 1k volt lines.

It's not about whether they can or can't. It's about the massive liability for the company if they fuck up on the job and cause property damage or bodily injury.

Are the same standards applied for alcohol?

Yeah, but a non-pot smoking worker (vs the pot smoker), both sober while on the job, are equally as likely to make a mistake.

That could be true in a causative sense, but not a correlative* one. Not that it's ethical to do so, but by testing for marijuana smokers, businesses/insurance companies may by proxy be testing for other traits likely to cause accidents

Can someone who smoked a joint 30 minutes ago?

Can someone who smoked a joint a couple days ago be trusted not to smoke one 30 minutes before starting work with the concrete cutters? Trusted enough to bet your company on? (Because you know that if the worker smokes a joint just before working with the concrete cutters, and someone gets injured or killed, the owner loses the company in the lawsuit.)

> Can someone who drank a beer a couple days ago be trusted not to drink one 30 minutes before starting work with the concrete cutters? Trusted enough to bet your company on? (Because you know that if the worker drinks a beer just before working with the concrete cutters, and someone gets injured or killed, the owner loses the company in the lawsuit.)

OK, fair point.

What's insurance?

Yeah, but your job likely doesn't involve hard, physical labor, and you're likely paying more.