@farmerman,
I had an amusing experience at Rocky Flats Co in the late '90s. We were negotiating closure criteria for the site with EPA Region 8. They raised the issue of Plutonium contamination in the soil at the site - hard to deny in that there was the unmistakable signature of Americium gamma decay (it is a Plutonium decay product) in the soil. The inferred concentration was vanishingly low (about 1/100,000th that of the naturally occurring Thorium, but EPA's demanded remedy was the removal of the top meter of soil from a 2mile by 2 mile reservation - about 12 million cubic yards. The potential human health hazard was vanishingly small and well below that already presented by naturally occurring elements in the soil around the Rocky Mountains but the EPA folks were insistent,
We pointed out using, NTSB statistics, the hundreds of deaths that would occur as a result of the truck traffic, and noted the inherent silliness of simply dumping the stud in the Utah desert, but to no avail. One of my deputies then pointed out that a new and "threatened" subspecies of jumping mouse had just been named -- the "Prebles Meadow Jumping Mouse " and it inhabited the foothills around the Front Range, including Rocky Flats.
So we set up Fish & Wildlife against the EPA and the Mouse won ! Years later I accidentally came across an obscure note in a journal noting that the formerly known distinct subspecies of jumping mouse, known as the Preble Meadows mouse was found not to have been a subspecies at all. I thought to myself "that's OK mouse, you did your job."