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LUKE, Md. (AP) — A government commission that treats wastewater from a western Maryland paper mill says a chemical spill that tainted the Potomac River last month did not violate pollution limits.

The Maryland Department of the Environment said Thursday it's investigating whether the Upper Potomac River Commission violated its permit in the Sept. 23 spill of 9,500 gallons of synthetic latex from the Verso Corp. mill in Luke.

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Verso properly notified MDE within 24 hours after the liquid spilled into a sewer leading to the wastewater plant.

MDE says the commission is also obligated to report within 24 hours if it knowingly discharges wastewater that exceeds pollution limits. MDE tells the Cumberland Times-News (http://bit.ly/1JVlYHA ) it received no such report, and that the commission says the discharge was within permitted limits.

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