http://ap.google.com/article/ALeqM5iuGq6yeUvlwsIsXQiT3Qx23gcpswD8UQ1VM01
> The CDC, working with FEMA, hired a contractor. The firm Bureau
> Veritas North America tested air samples from 358 travel
> trailers, 82 park model and 79 mobile homes.
> Analysis of the samples, taken from Dec. 21 through Jan. 23, came
> back last week, McGeehin said.
> They found average levels of 77 parts formaldehyde per billion
> parts of air, significantly higher than the 10 to 17 parts per
> billion concentration seen in newer homes. Levels were as high as
> 590 parts per billion.
> The highest concentrations were in travel trailers, which are
> smaller and more poorly ventilated, McGeehin said.
How about this tidbit?
Terry