After reading this whole thread, the stealth vape makes most sense in response to predicament OP is up against. Perhaps if we weren't on a vaping forum, I'd feel differently. Unlikely, but perhaps.
With stealth vaping comes the inherent risk of - I'd have to be caught for it to matter. And to get caught, you'd have to be abusing the risk involved, which I would think in well paying job, one wouldn't but of course, like everything, this could vary by individual.
Not vaping for 10 hours out of the working day doesn't make sense if one is a vaper. To agree to that making sense, it could, rather easily, be argued that the individual ought to consider going cold turkey. Especially if the premise is: this high paying job matters more to me than vaping. If you can't go cold turkey (which I would have tough time believing, but for argument sake, let's say you can't), then you are saying in your own roundabout way that vaping is more important than the job. Own that. Take responsibility for that.
The most sensible post I've read in this thread is:
In my interview for my current job I asked;
Is smoking allowed?
Is vaping allowed?
Does the insurance premium depend upon cotinine test results?
Would there be a pre employment physical and what might it entail?
The wrong answer to any of these questions could have easily ended the interview. Pay is important, yes. But it's merely a means to an end. The end is a comfortable life. Can't have one if you're miserable at your job.
This says that the employee's individual choices matter. It also says, in my reading, that a desire to vape (and live a comfortable life) is more important than a high paying job with an otherwise unnecessary rule in place.
As this thread deals with stuff that was agree upon after the fact, though sprung on OP the day after the job was accepted, well how I roll is I would be fighting that rule in my own strategic way that wouldn't necessarily draw lots of unwanted attention on myself unless some arrogant supervisor tried (feebly) to play hard ball. I'd be fighting for a rule that allows vaping in a designated area, by showing all the scientific evidence currently available that provides for relative harmlessness of passive vaping. If that was met with someone playing hardball who essentially is coming from position of - science doesn't matter, this is policy we are going with because we said so, then I would really question why I am in business with these people. Am I really that happy selling my soul to gain money? Really? And if somehow the answer to that was, sure I'll suck it all up and agree to this policy, well then I'd be on lookout for all possible situations that could possibly offend another person, to even a slight degree, and seek company policies in the company (maybe even lawsuits outside of the company) whereby no one should be comfortable working here unless there is a 100% clear indication they are only doing their job. As I've never seen that, or even heard of that, and can barely even imagine that, then I'm pretty sure I could get some mileage ought of this approach, even while I would be coming off like a D-bag. But, keep in mind how I, or we, got to this place where all this actually kind of makes sense, within the context that apparently we all agreed upon when we decided this company's policies trump any (and I really mean any) one that feels their individual choices could matter more.
Also just want to add, especially on vaping forum, that I think we ought to be fighting these workplace laws rather than going with principle of "my house, my rules." I realize that is seen as the end all, be all, but in my world it is not. As in clearly is not the overriding principle at work on this planet. Way closer to illusion to accept that as overriding principle. You can fight that both respectfully and boldly and unless dealing with D-bags, you can gain something in the fight, not the least of which is integrity. You could lose in that fight, but you'll know how far you are willing to push and when pushing for you is taking things too far. But I truly think not fighting it stands much more to lose than fighting it in a strategic and respectful way.
Which makes the clearest sense possible. But admittedly, I too could be persuaded by "high paying" job that I think I like, and so temptation would be there to not rock the boat. Though greater temptation would be to stealth vape. And as I started with that, I'll end with that. Stealth vaping makes most sense in response to predicament OP is up against.