Wet Floodproofing Requirements for Structures Located in Special Flood Hazard Areas in Accordance with the National Flood Insurance Program [open pdf - 4MB]
"This Bulletin describes planning, design, and construction requirements for wet floodproofing certain types of structures and their uses under the National Flood Insurance Program (NFIP). The basic characteristic that distinguishes wet floodproofing is the internal flooding of a structure as opposed to providing essential watertight protection."
Technical Bulletin 7-93
Federal Emergency Management Agency: http://www.fema.gov/