POL Government Elected Officials Auditor Mary Hull Caballero Charter, Code & Policies City Code & Charter Online Code & Charter Title 8 Health and Sanita Chapter 8.20 Housing and School Sanitation
8.20.230 Basements and Cellars.

The floor of the cellar or other lowest floors of every dwelling shall be free from dampness.  When it is necessary to secure such condition, it shall be concreted with not less than 3 inches of waterproof concrete of good quality with finished surface.