There is no penalty for not signing up for company health insurance. Since the company pays for around 2/3rds of the plan, they save money if you do not sign up.

And the spousal surcharge was over a long time ago (the union just recently won a grievance against the company for this). For a couple years they would add a $100 surcharge per month if your spouse was on your plan if that spouse worked (they wanted to force spouses onto their own employers plan so that they would not have to pay 2/3rds of their health insurance). It does not exist anymore.