3M’s own studies showed PFAS compounds were not breaking down in the environment, were in their employees’ blood, and harmed laboratory test animals This conversation is moderated according to USA TODAY’s community rules. Please read the rules before joining the discussion. The chemical contaminant PFAs is emerging as a big problem in Michigan. Keith Matheny, Detroit Free Press A 3M environmental specialist, in a scathing resignation letter, accused company officials of being ”unethical” and more “concerned with markets, legal defensibility and image over environmental safety” when it came to PFAS, the emerging contaminant causing a potential crisis throughout Michigan and the country. PFOS, one of 3M’s chief PFAS products, ”is the most insidious pollutant since PCB,” Richard Purdy stated in his March 28, 1999, resignation letter, referring to a compound used in 3M’s ScotchGard stain-protection product line, among other uses. “It is probably more damaging than PCB because it does not degrade, whereas PCB does; it is more toxic to wildlife,” he stated, adding that PFOS’s end point in the environm...