These calculations are mine. The depleted uranium tested is the product where plutonium pu239 has already been seperated from reactor run spent enriched uranium 235. The fresh out of the ore deposit yellow cake processed to uranium oxide and then a metal enriched uranium u235 before it went into the reactor was 100% free of plutonium. As was the depleted uranium u238 left over. However by the equation nuclear fission reactors produce dense slow neutron clouds which uranium u238 in the enriched uranium reactor fuel captures and changes to pu239 thus spent enriched uranium u235 reactor fuel contains significant quantities of pu239. This pu239 which is very very valuable was extracted along with u235 from the spent fuel and stored as depleted uranium. As it still had some u235 value it was taken out of depleted uranium storage and enriched a second time. The plutonium levels in it were tested and most of the plutonium had been extracted from it earlier as a spent fuel extraction. There was found to be only roughly one ounce of plutonium per 10,000 pounds of u238 (the depleted uranium tailings) of the depleted uranium in government storage. Thus the U.S. government is very efficient at extracting very very valuable plutonium from spent enriched uranium 235 reactor fuel in manufacturing depleted uranium This depleted uranium with one ounce of plutonium per 10,000 tons of uranium 238 has been under secutity since 1993. On a comparison basis the FAT MAN Robert Oppenheimer compression pu239 fission bomb over Nagasaki used 13 pounds of plutonium of which only two pounds fissioned and eleven pounds were blown into the atmosphere as plutonium dust. For a span of three decades in comparison depleted U.S. government uranium manufactured contained only one ounce of plutonium per 10,000 pounds. This information is exceptionally helpfull in understanding Gulf War Syndrome. Levels of this poor quality of depleted uranium - because it contains plutonium as one example - are very very low in plutonium. The deduction being even if for some foolish reason this type of uranium was used in war shell casings one must look beyond the powdered dangerous metal plutonium to understand and find the cure for Gulf War Syndrome.