re: #226 Amory Blaine

One problem is that we’ve established legal limits for blood alcohol above which an individual is considered impaired, and we have simple, easy methods for determing whether you are or are not above that limit.

IIRC, tests for THC don’t report a concentration, and even if they did, there’s not a legal limit below which one is not considered impaired. If an employee tests positive for THC, he might have gotten baked on Friday night and be totally sober by Monday, or he might have smoked up on his coffee break. How can you distinguish those?

Add to that the fact that it’s illegal in most of the United States, and you have little to stand on to argue against testing, at least in workplaces where impairment is a significant safety issue.