Although laboratory tests are pending, Corson said a state inspector found reason to believe that the underground 87-octane fuel tank had been contaminated with water. It’s not a common problem, he said, but can happen in the early spring when there is a quick snow melt while the ground is still frozen.
Read more: http://www.startribune.com/marathon-gas-station-in-chanhassen-partially-shut-down-after-motorists-find-water-in-fuel/413745033/