Take each of the errors like

Table error: Object ID 1993058136. The text, ntext, or image node at page (1:10088548), slot 0, text ID 312662884352 is not referenced.

And use DBCC PAGE to do a dump of that page. E.g.

DBCC TRACEON (3604)

go

DBCC PAGE (yourdb, 1, 10088548, 3)

go

Variety of things that could have caused this, including SQL bugs. Unreferenced pages are usually orphans, but it's very hard to determine whether the data wasn't cleaned up properly during a delete, or whether some corruption has occured. I'd need a few hours poking around on the system so I'd say you're not going to find out.

If you don't have any backups to restore from, you have no option but to run REPAIR, or live with the corruption in the database and it's possible effect on SharePoint. No way to tell what effect it will have without examining the database.

Hope this helps.