Items left on the beach after sunset aren't classified as lost & found, but rather as abandoned. As you know, but I'll repeat for those who might not know it, the county has a "remove it or lose it" policy, with emphasis on "lose it".
I would tell your friend to check with the TDC though. They may have a holing pen for some items. If items of real value (more value than umbrellas, tents and chairs) they may keep for awhile or turn over to the Sheriff's office, but I'm not sure.

TDC 267-1216
County Landfill 892-8180
Citizen Services 892-8530
Good luck!

