“For more than three years, 3M Co. underreported its discharge of a class of potentially toxic chemicals into the Tennessee River by a factor of 1,000, according to a letter sent by a 3M official to regulators at the Alabama Department of Environmental Management.
In an April 20 letter to ADEM, 3M Environmental Engineer Jennifer Brown wrote that, from the last quarter of 2012 through the first half of 2016, 3M inadvertently had reported its discharge monitoring reports in milligrams per liter instead of micrograms per liter, but ADEM had recorded the data as micrograms without conversion.”