A federal agency will conduct a study to determine the danger of drinking groundwater contaminated by the industrial solvent sulfolane (SULL-fo-lane) in the North Pole area. The research was sought by the state of Alaska as it tries to set a clean up level for wells tainted by sufolane from spills at a local oil refinery. As KUAC’s Dan Bross reports, the new study will delay a determination on what constitutes safe water.