The method TVA and others are using to test and analyze the toxicity of the coal ash splayed through a neighborhood, fields and streams beside TVA's Kingston power plant can't adequately determine the potential risk, experts say.
The levels could be higher — or lower — than the tests show.
Documents from the U.S. Environmental Protection Agency and National Academy of Sciences back up the contention that the one-size-fits-all testing in use has major shortcomings.
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