New Job

Yesterday I was offered a new job 🙌 thank God, because I lost my other job that was a work at home job, after I had my LO. I'm happy to be starting work this week, but I'm nervous about asking to go pump. The job that I accepted is at an auto body shop, there's only one other female that wil be working there as well, and I'll be the receptionist, so I'm sure it'll be hard to go off for 15mins or so every few hours. I'll be working 10hrs a day, so I'm going to need to be able to pump at least 3 times a shift. Do anyone have any suggestions how to talk to my supervisor about it? Thanks