Archeologist Dr. Ronald Williamson and his crew removed a cubic meter of soil at the location of each of 90 caissons before the contractor began work. All the soil was screened and artifacts recorded and photo-documented. Similarly, to avoid disturbing the existing soil during landscaping, berms were created on the eastern edge of the site and densely planted with trees and shrubs. The building's interior is intended to lend dignity and comfort to customs procedures. Materials and finishes are simple and maintenance-free.
Beech wood cladding on upper walls adds warmth.