2009 Annual Conference September 22, 2009 Tom Skebey, CFM

Wet Floodproofing

Wet Floodproofing Techniques Openings Flood resistant materials Protect equipment  Elevate  Protect in place Modify surfaces for easy cleanup Emergency preparedness planning O&M plan adjustments

Determine the FPL Establish system component vulnerability Develop alternatives ( elevate or protect in place) Verify with homeowner and code officials Construct/implement Wet Floodproofing Design Process

Typical Opening for Solid Foundation Wall

FLOORING MATERIALS CLASSIFICATIONS FOR FLOOD RESISTANCE Classes of Flooring AcceptableUnacceptable Asphalt tile Carpeting (glued down type) Pressure-treated lumber,.40 CCA 4 Flooring Materials

Modify Surfaces Contamination issues Ease of cleanup Paint Cladding Resurface

Wet Floodproofing Field Investigation Worksheet Can backflow prevention valves be used to minimize flow of sewage into the building? __Yes __ No Can equipment feasibly be relocated? __Yes __No Can the system be moved to a higher elevation on the property? __Yes __No Can the tank be relocated to a higher elevation or indoors? __Yes __No Can the drains and toilets be relocated above the DFE? __Yes __No Is space available for the equipment in the alternate location? __Yes __No Can existing spaces be modified to accept equipment? __Yes __No Is additional space needed? __Yes __No Do local codes restrict such relocations? __Yes __No Potable Water Systems Can the well be protected in-place? __Yes __No Is it feasible to install a curb or “pony” wall around equipment below the DFE? __Yes __No Can the wellhead and tank be protected from scour and impact forces? __Yes __No Can the supply lines be properly protected from scour and impact forces? __Yes __No Can backflow prevention valves be used to minimize flow of floodwaters into the water source? __Yes __No Can the equipment be feasibly relocated? __Yes __No Can the well be moved to a higher elevation on the property? __Yes __No Can the electric controls for the well be protected from inundation? __Yes __No Can the tank be relocated to a higher elevation or indoors? __Yes __No Can the taps be relocated above the DFE? __Yes __No Is space available for the equipment in the alternate location? __Yes __No Can existing spaces be modified to accept equipment? __Yes __No Is additional space needed? __Yes __No Do local codes restrict such relocations? __Yes __No

Utility Systems Electrical systems Heating, ventilation and air conditioning (HVAC) systems Fuel supply/storage systems Water systems Sewer systems

Electrical Systems Protective measures: Raise or relocate equipment and devices above the FPL Seal outside wall penetrations, mechanically protect wiring system in flood-prone locations Seal out moisture Add Ground Fault Interrupting Circuit (GFIC) breakers

Heating, Ventilating, and Air Conditioning (HVAC) Systems Maintenance of required equipment clearances and access dictated by code and/or manufacturer Provision of adequate combustion air for fuel-burning equipment Modification and/or maintenance of proper venting of fuel-burning equipment Eliminating ductwork below the DFE

Fuel Supply/Storage Systems Use of flexible connections Adequate support and anchorage to resist hydrostatic and hydrodynamic forces that act on tank Relocation of fuel tank because of equipment relocation Use of automatic cut-off valves

Water Systems Minimizing plumbing fixtures below the FPL Modification of fixtures to prevent backflow Protection of system components from high velocity flow Modification of the well top using watertight casing

Installation and/or maintenance of a check or sewer backflow prevention valve Installation of an effluent ejector pump Provision of a backup electrical source Sealing of septic tank to prevent contamination Adequate anchorage of septic tank to withstand buoyancy forces Sewer Systems

1. RETURN AND SUPPLY AIR 2. HORIZONTAL AIR FURNACE WITH ADD-ON COOLING, 2 to 5 TON CAPACITY 3. EXTERNAL DUCT AND EQUIPMENT INSTALLATION 4. EARTHQUAKE STRAPPING FLOORS NOT SHOWN FOR CLARITY Elevation of HVAC Components Below a Floor, Above DFE

Enclosure to Protect From Shallow Flooding

Elevated Water Heater

Protection of Service Equipment

Tank Buoyancy

Buoyancy Counteraction

Emergency Preparedness Planning Flood warning system Warning time Implementation time Examples

Operation and Maintenance Plans Flood warning system Warning time Active involvement Who does what? Drills Examples

References

Wet Floodproofing Questions?