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May 23, 2017

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Work continues around a storage tank with the chemical designation MCHM, 4-methylcyclohexane methanol, the chemical that leaked into the Elk River, at Freedom Industries storage facility in Charleston, W.Va., on Monday, Jan. 13, 2014.

Steve Helber / Associated Press

Work continues around a storage tank with the chemical designation MCHM, 4-methylcyclohexane methanol, the chemical that leaked into the Elk River, at Freedom Industries storage facility in Charleston, W.Va., on Monday, Jan. 13, 2014.