Police look on toward a plume of smoke or steam rising in the area where there is a possible leak at the Exxon Mobil Refinery in Channahon, Illinois, Friday, October 19, 2012. | Joseph P. Meier~Sun Times Media
Police look on toward a plume of smoke or steam rising in the area where there is a possible leak at the Exxon Mobil Refinery in Channahon, Illinois, Friday, October 19, 2012. | Joseph P. Meier~Sun Times Media
An Exxon Mobil Joliet Refinery truck heads west on Arsenal Road where there is a possible leak at the Exxon Mobil Refinery in Channahon, Illinois, Friday, October 19, 2012. | Joseph P. Meier~Sun Times Media
Police redirect traffic away from west bound Arsenal Road where there is a possible leak at the Exxon Mobil Refinery in Channahon, Illinois, Friday, October 19, 2012. | Joseph P. Meier~Sun Times Media
A truck spreads sand at the intersection of Baseline Road and Arsenal Road where there is a possible leak at the Exxon Mobil Refinery in Channahon, Illinois, Friday, October 19, 2012. | Joseph P. Meier~Sun Times Media
Police redirect traffic away from west bound Arsenal Road where there is a possible leak at the Exxon Mobil Refinery in Channahon, Illinois, Friday, October 19, 2012. | Joseph P. Meier~Sun Times Media
CHANNAHON TOWNSHIP — The state is seeking legal action against the ExxonMobil Oil Corp. refinery because of the Friday incident that shot an airborne oil mist as far as four miles away. State regulators announced Wednesday they have asked the Illinois Attorney General to take …