The Iowa River crested on June 15, 2008, at 31.5 feet, almost 10 feet above flood stage in Iowa City and 22 buildings at the University of Iowa (UI) were inundated with floodwater. After a building was cleaned by the cleanup contractors, Terracon's field staff collected air and surface samples to assess whether the cleanup contractors had mitigated the bacterial and fungal hazards left behind by the floodwaters. Utilizing a team of more than 60 staff from more than 15 different offices across the country, Terracon was able to cover multiple building sites simultaneously. Terracon's industrial hygienists interpreted the laboratory results and reported them to the UI with approval for reoccupancy or recommendations for further cleaning, if necessary. With rapid turnaround response times from the analytical laboratory, all the top priority buildings were ready for occupancy by the deadline. Phase two involved observing the cleanup contractors as they cleaned and restored the heating, ventilating, and air-conditioning (HVAC) systems in the remaining flood-affected buildings. For phase three, the UI brought in more than 20 mobile trailers to use as temporary classrooms and offices for the spring semester of 2009. Prior to occupying the trailers, Terracon conducted formaldehyde testing of the ambient air in some of the new trailers to address concerns of formaldehyde out-gassing from the building materials.