NEW ORLEANS AP – Federal officials issued trailers to Hurricane Katrina victims even though some workplace safety tests detected high levels of formaldehyde at government staging areas for the structures just weeks after the storm, a lawyer for hundreds of occupants said Wednesday.

Documents from the Occupational Safety and Health Administration raise new questions about how much federal officials knew about the units, which were sent to tens of thousands of displaced residents, said attorney Anthony Buzbee. But they don’t say whether the tests in the weeks after the August 2005 storm were conducted inside or outside the trailers.