Horizontal Lines on Lab Scans

I've been shooting for years and sometimes my lab scans come back with horizontal lines in them. It's somewhat rare that I see them, but I was sad that it happened on this roll as I liked a lot of the shots. I asked one of the employees, and he was not certain. I think it might be something in the scanner or density adjustment, but can't say for sure.

The details:

• ProImage 100
• Nikon F100
• AF-S 85mm 1.8 G
• Noritsu scanner
• Processed in a rotary machine, as their mini lab is down for the moment.

I put a curve on this shot to emphasize the lines, but they were somewhat apparent. These lines look somewhat bowed, but other times they are straighter.