It was originally used to launder protective clothing used by employees in the Uranium-handling areas of Building 444. Later, the structure included a filter-testing laboratory and storage area for high efficiency particulate air filters and respirator cartridges. The newer portion, completed in 1975, is a pre-engineered metal building and encompasses approximately 5,420 square feet. The original structure is constructed of corrugated metal walls and has a flat roof. The windows are multi-paned with metal sashes, arranged in sets of three.
Partition walls are concrete masonry and fiberboard.
The filter laboratory is housed in this section of the building. The newer part of the building contained the warehouse operation for the staging of filters for the filter test laboratory. Incoming filters that needed to be tested were stored until testing was completed. Filters that had been tested were repacked and stored for distribution. The structure is constructed of rigid tapered-steel bents with no interior columns.