The "at times" part could be in relation to "without breaks". He is working 14 hour shifts, at times without break. Still doesn't mean he would work 70 hours every week but I assume anyone who mentions they have to work 14 hour shifts does so regulary that they are working more than the standard 40 hour week. And that has to be considered when talking about the salary. The 70 hours would be "worst case scenario".