What happened to the second-hand smoke that supposedly gets in your system? Can they refuse to hire someone who lives with a smoker?
What about if you're using the gum or patch?
The gum/patch question is interesting. I'd like to know how they handle cases like that.
In the link I posted earlier in this thread about nicotine in vegetables, it gave one microgram (millionth of a gram, thousandth of a mg) as the amount of nicotine a "passive" smoker gets in a room with a "minimal" amount of tobacco smoke
for three hours.
"Minimal" here is like a cigarette smoked in a room. Most of the air is still air, you know?
In other words, second-hand smokers would also have far lower concentrations than a smoker, a vaper, or someone taking NRT. A nicotine test should have no trouble differentiating. The nicotine isn't what's bad for the second-hand smokers-- it's the smoke. Second-hand smokers show the same symptoms as firefighters exposed to too much smoke occupationally.
Again, intaking tobacco or a tobacco derivative (like e-juice) is the only way to realistically fail one of these tests. A non-smoker can't just stumble on getting that much nicotine in themselves.