Earlier quoted context omitted.
Ozone is a well known cancerigen. Maybe they shouldn't do that anymore ?
Ignorant guy talking here: Wouldn't it just "fly away". I mean, its a gas. Why would there be any sticking around when delivered to the dealer?
There's unlikely to be any ozone left after 12 hours anyway, but cars aren't air tight so volatile or not within the weeks it takes to get to you the level should be down to zero.