I don't think they will negotiate it. You should also know that your yearly raises will only be at most 3% of your salary (HR will tell you it is potentially 5%, but I know of nobody who has received that much). As time goes by, the union worker who has been with the company the same amount of time will quickly surpass your salary. Also, the tuition reimbursment isn't all that. They only reimbursed about a third of mine. And finally, your benefits will cost about twenty dollars a week, and will have a 500 dollar deductible.
That's a freaking rip off. No wonder my sup, who I've known since she was an hourly, is always in a bad mood now. Do sups still get bonuses?