I wish you had updated how this went. I would be curious to know for sure.
I would say that they cannot possibly have you there for 8 hours, even in interviewing, without a break. That isn't typical. Even in interviews & training, typically you would have a morning break of 10-15mins, a lunch break period and then another afternoon break. I worked & pumped & this routine was workable for me. Most working mothers that I know that breastfed did the same routine, with the 3 breaks. It's not ideal at all. I really think I would have done better with 25min breaks because I did have issues with plugged ducts by not being able to drain fully & ideally my body seemed to prefer to pump for 20mins (so the other five is setup/cleanup). It wasn't feasible in my job though & the federal law that is so often cited actually only applies to business with over 50 employees. So only 38% of Americans work for businesses that this applies to. 54% work for businesses where it has no enforcement or application & the remaining people work in various other capacities (self employed, contractors, etc).