What to know about Cleaning Commercial Buildings
Cleaning Flooded Buildings:
This Fact Sheet was developed to help building owners, operators, contractors, and volunteer assistance groups deal with the challenges of working in structures that were not fully cleaned and dried shortly after the flooding. Remember that when first returning to a flood-damaged building, responders should follow the initial precautions and restoration steps detailed in the FEMA Recovery Advisory, The ABC’s of Returning to Flooded Buildings (Appendix E of FEMA 549, 2005). When a flooded home has not been cleaned and dried within a few weeks of the flood event, mold contamination should be expected, and specific steps are needed to clean and restore the home. Basic cleaning and drying information is presented in the FEMA Recovery Advisory Initial Restoration for Flooded Buildings (FEMA 549, 2005), which specifies five steps for post-flood building restoration, including (1) air out, (2) move out, (3) tear out, (4) clean out, and (5) dry out. This Fact Sheet builds on the last two of these steps and assumes that the majority of the muck-out and gutting process has been completed and the home is ready for cleaning and drying. Key Issues • Floodwaters carry a variety of contaminants such as bacteria, oil, heavy metals, and pesticides. While first responders’ initial evaluations of Hurricane Sandy floodwaters indicated that exposure to such items are below current limits for safe occupancy, proper cleaning and preparation for rebuilding is critical to protect workers and occupants from both short-term hazards and long-term risk. • Other hazards are present in addition to the substances brought in with the floodwaters, especially in homes that were not dried out within a week of the flooding. Safety issues related to wet mechanical and electrical systems, exposure to lead and asbestos released from building materials, and mold growth need to be addressed. • Mold is a serious health hazard if the home is reoccupied without proper cleaning. Although a variety of products and techniques can reduce and control mold, the cleaning and drying process described in this Fact Sheet also helps to remove other floodwater contaminants. Personal Safety Flooded buildings can pose a number of health and safety risks, for both individuals who wish to maintain occupancy and those who work to repair them. Eliminating hazards is the best way to protect occupants and workers; however, until conditions can be returned to normal, anyone working in a flooded building should use appropriate personal safety equipment and take appropriate safety precautions.
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