The Tennessee Valley Authority's coal-burning Allen Fossil Plant on Friday, July 14, 2017 in Memphis, Tenn. Groundwater in wells at the plant have tested for excessive levels of arsenic and lead. (AP Photo/Adrian Sainz)
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The Tennessee Valley Authority's coal-burning Allen Fossil Plant on Friday, July 14, 2017 in Memphis, Tenn. Groundwater in wells at the plant have tested for excessive levels of arsenic and lead. (AP Photo/Adrian Sainz)
