FAIRBANKS, Alaska (AP) - A decision on who is liable for cleanup of pollution that seeped from a North Pole oil refinery into groundwater is in the hands of a judge.

The Fairbanks Daily News-Miner reports state Superior Court Judge Warren Matthews heard closing arguments Tuesday in a trial focused on sulfolane, a manmade compound used in refining.

Sulfolane in late 2009 was detected in wells near the North Pole Refinery, which had been sold in 2004 by Williams Alaska Petroleum Inc. to Flint Hills Resources.

The two companies and the state have been in litigation regarding the pollution plume for nearly a decade.

An attorney for the state asked the court to hold Williams liable for decades of hazardous substance pollution.

An attorney representing Williams said state regulations on sulfolane were flawed.

Information from: Fairbanks (Alaska) Daily News-Miner, http://www.newsminer.com

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