Hottubjoe: I mostly agree with you. The half life of Pu-239 is 25,000 years, total decay takes approximately 250,000 years. Unfortunately, it doesn't stay in one fixed spot. The ground water table at Rocky Flats is quite shallow. In supersaturated conditions such as the big flood (2013) the ground water table rises until it is at the surface pushing contaminants above and out to become surface water runoff and lateral seepage. Federal and local municipalities did not want to recharacterize the Rocky Flats site after the flood.

Studies we found indicated Plutonium was statically attracted to pine pollen (See Dr. Harvey Nichols' snow study), litter including twinkie wrappers and vegetation. It was found to be taken up in vegetation as well as the exterior of plants. George Setlock's 1986 Radioecology and Airborne Pathway Report indicated Pu was found in all the wildlife and feces. The prairie dogs were considered to be "spreaders of contamination." Hence concern regarding public access.