If you are running a 5 day per week schedule, it means 10 paid days off, but generally most employees expect to get the entire week off with the weekend being unpaid. Depending on your work week, that's Sunday through Saturday or Monday through Sunday. If you happen to schedule work for the weekend of the vacation, you shouldn't expect the person on vacation to show up for it. Well, I suppose you could, but my last employer never did.
Now that I am working continuous run, I get 80 hours of vacation. You get 7 days off in a row by scheduling two vacation days for the middle of the week where you are scheduled for a 3-day weekend. And since continuous run is 12 hour days and 80 is not evenly divisible by 12, you end up with 6 full days of vacation and getting paid for only part of a seventh or you just cash in the left over hours at the end of the year.
My last employer didn't pay only 40 hours pay , but 2% of the last year's gross for each week's vacation with 40 hours pay being the minimum. If you worked a lot of overtime, you received a substantial increase over a 40 hour check.