The Tarmiya site had no security fence and no visible electrical capacity; only later did inspectors discover that it was powered by a 30-kV underground electrical feed from a 150 MWe substation several kilometers away. Tarmiya was also situated within a large military security zone, thereby needing no additional perimeter security or military defenses at the site. At this same site, the Iraqis built a multimillion-dollar “chemical wash” facility for recovering uranium from refurbished calutron components. This facility was reportedly as sophisticated and clean as any in the West, and triple-filtered so as not to release any trace effluents into the atmosphere that might have led to its detection once it began operation.

Prior to the first IAEA inspection after the Gulf War, the only known nuclear facilities in Iraq were those at the Al Tuwaitha nuclear center, where nuclear material was being safeguarded. No other facilities were declared in the initial Iraqi statements. That the Tarmiya facility housed a substantial piece of the Iraqi nuclear program was only confirmed after the Gulf War in the early summer of 1991, when the movement there of large saucer-like objects (just prior to the first IAEA inspection of the site) led to the positive identification of the Iraqi calutron program. Much of the equipment at this site was disassembled unilaterally by Iraq, and the components hidden from IAEA inspector teams. These pasts were eventually turned over to IAEA personnel and destroyed in place.