https://en.wikipedia.org/wiki/Perfluorooctanesulfonic_acid https://en.wikipedia.org/wiki/Perfluorooctanesulfonic_acid Thanks for posting the (ppt) 20 ppt. It

https://en.wikipedia.org/wiki/Perfluorooctanesulfonic_acid https://en.wikipedia.org/wiki/Perfluorooctanesulfonic_acid Thanks for posting the (ppt) 20 ppt. It looks like all the animals have higher levels. One example, with a Science(TM) paywall, cited on the wiki - Great tit near 3M, Port of Antwerp, Belgium 2007 liver 553–11,359[39] Had a 553-11,359ppb from liver tests published in 2006. Really happy we moved away from ppb to ppt.