The staples that I goto here by Norco scans full size plans for $2.99 each and will put it on your own usb drive. Don't be afraid to tell the clerk that does the scan to scan it in Black and White and at 400 dpi. The reason for black and white is that it clarifies smuges and dirty spots so your scan comes out better.

I've found that most will scan in color if you don't say to scan at black and white.If your getting a scan don't forget to bring a usb dirve as it gets expensive if you show up to get your plans scanned and have to by one at the store.