DES MOINES, Iowa (AP) — Iowa's Department of Natural Resources says results from several monitoring stations along the Mississippi River show much of the ethanol that leaked into the water after several train cars derailed has dissolved.

DNR spokesman Kevin Baskins says the highest levels of ethanol have been detected nearest the site where 14 cars containing the fuel went off the tracks Wednesday in a remote area north of Dubuque.

Baskins says ethanol dissipated fairly quickly in the first mile downstream, with fuel levels undetectable 10 miles away.

Officials say they're still unsure how much ethanol spilled into the Mississippi, but Baskins says the approximately 55,000 gallons that remain unaccounted for were involved in a three-car fire, pooled over an acre of ice, soaked into soil in the area and leaked into the river.

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