FAIRBANKS - Public health officials say they're about a month away from determining the safety of water near the Flint Hills refinery in North Pole after numerous wells have been found tainted by chemicals.
Since November, officials have found the chemical sulfolane in the wells in the area.
The Fairbanks Daily News-Miner said sulfolane is a chemical used the fuel refining process. Flint Hills officials said the chemical may have been introduced to groundwater in a spill more than nine years ago.
Safe levels of sulfolane in drinking water have not been determined by the government because it is not regulated.